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Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jun. 30, 2013	Aug. 05, 2013
Document Information [Line Items]
Entity Registrant Name	INNERWORKINGS INC
Entity Central Index Key	0001350381
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	INWK
Entity Common Stock, Shares Outstanding		50,957,708
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2013

CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue	$ 210,875,626	$ 201,397,471	$ 415,191,751	$ 389,943,873
Cost of goods sold	162,699,024	153,551,408	321,022,654	300,704,427
Gross profit	48,176,602	47,846,063	94,169,097	89,239,446
Operating expenses:
Selling, general and administrative expenses	42,257,681	37,644,103	83,993,470	70,727,367
Depreciation and amortization	2,648,396	2,936,981	5,114,063	5,381,077
Income from operations	3,270,525	7,264,979	5,061,564	13,131,002
Other income (expense):
Gain on sale of investment	0	247,875	0	495,572
Interest income	555	43,047	7,889	94,788
Interest expense	(514,825)	(660,492)	(999,932)	(1,358,586)
Other, net	25,510	(124,329)	(420,653)	13,939
Total other expense	(488,760)	(493,899)	(1,412,696)	(754,287)
Income before income taxes	2,781,765	6,771,080	3,648,868	12,376,715
Income tax expense	878,420	2,296,680	850,393	4,214,627
Net income	$ 1,903,345	$ 4,474,400	$ 2,798,475	$ 8,162,088
Basic earnings per share (in dollars per share)	$ 0.04	$ 0.09	$ 0.06	$ 0.17
Diluted earnings per share (in dollars per share)	$ 0.04	$ 0.09	$ 0.05	$ 0.16
Comprehensive income	$ 1,705,075	$ 3,493,203	$ 749,009	$ 7,582,597

CONDENSED CONSOLIDATED BALANCE SHEET - USD ($)	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 14,164,356	$ 17,218,899
Accounts receivable, net of allowance for doubtful accounts of $1,553,926 and $1,475,854, respectively	151,357,448	149,246,568
Unbilled revenue	27,041,664	30,798,230
Inventories	16,390,726	17,406,863
Prepaid expenses	16,276,354	16,210,053
Deferred income taxes	1,440,660	1,513,414
Other current assets	18,715,608	21,051,907
Total current assets	245,386,816	253,445,934
Property and equipment, net	19,516,534	17,078,384
Intangibles and other assets:
Goodwill	262,004,506	214,086,880
Intangible assets, net of accumulated amortization of $18,195,508 and $19,847,228, respectively	39,367,233	36,396,865
Deferred income taxes	0	413,244
Other assets	699,262	822,275
Total Other Assets	302,071,001	251,719,264
Total assets	566,974,351	522,243,582
Liabilities and stockholders' equity
Accounts payable-trade	117,661,216	121,132,051
Current portion of contingent consideration	29,241,446	7,795,489
Due to seller	685,114	10,796,850
Other liabilities	9,394,107	8,111,051
Accrued expenses	13,405,782	17,558,675
Total current liabilities	170,387,665	165,394,116
Revolving credit facility	78,300,000	65,000,000
Deferred income taxes	6,960,274	5,000,740
Contingent consideration, net of current portion	80,249,969	63,869,281
Total liabilities	335,897,908	299,264,137
Stockholders' equity:
Common stock, par value $0.0001 per share, 200,000,000 and 200,000,000 shares authorized, 60,735,561 and 61,268,422 shares issued, 50,200,098 and 50,932,298 shares outstanding, respectively	6,127	6,074
Additional paid-in capital	203,233,352	198,117,936
Treasury stock at cost, 10,535,463 and 10,336,124 shares, respectively	(64,824,042)	(67,071,323)
Accumulated other comprehensive income (loss)	(1,844,004)	205,462
Retained earnings	94,505,010	91,721,296
Total stockholders' equity	231,076,443	222,979,445
Total liabilities and stockholders' equity	$ 566,974,351	$ 522,243,582

CONDENSED CONSOLIDATED BALANCE SHEET [Parenthetical] - USD ($)	Jun. 30, 2013	Dec. 31, 2012
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 1,475,854	$ 1,553,926
Intangible assets, accumulated amortization (in dollars)	$ 19,847,228	$ 18,195,508
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	61,268,422	60,735,561
Common stock, shares outstanding	50,932,298	50,200,098
Treasury stock at cost, shares	10,336,124	10,535,463

CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities
Net income	$ 2,798,475	$ 8,162,088
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	5,114,063	5,381,077
Stock-based compensation expense	2,054,106	2,451,374
Deferred income taxes	720,547	806,152
Gain on sale of investment	0	(495,572)
Excess tax benefit from exercise of stock awards	(1,066,357)	(7,447,068)
Change in fair value of contingent consideration liability	(1,040,557)	466,685
Other operating activities	269,988	434,060
Change in assets, net of acquisitions:
Accounts receivable and unbilled revenue	5,692,347	(16,611,005)
Inventories	1,029,174	2,455,852
Prepaid expenses and other	4,244,632	(6,895,351)
Change in liabilities, net of acquisitons:
Accounts payable	(6,379,266)	(5,364,653)
Accrued expenses and other	(5,132,129)	6,659,812
Net cash provided by (used in) operating activities	8,305,023	(9,996,549)
Cash flows from investing activities
Purchases of property and equipment	(5,822,741)	(5,045,823)
Payments for acquisitions, net of cash acquired	(11,559,092)	287,396
Payments to seller for acquisitions completed prior to 2009	0	(3,000,000)
Proceeds from sale of marketable securities	0	499,122
Other investing activities	0	11,567
Net cash used in investing activities	(17,381,833)	(7,247,738)
Cash flows from financing activities
Net borrowings from revolving credit facility	13,300,000	13,000,000
Payments of contingent consideration	(10,059,238)	(5,491,958)
Proceeds from exercise of stock options	1,842,044	1,171,660
Excess tax benefit from exercise of stock awards	1,066,357	7,447,068
Other financing activities	(36,642)	(7,270)
Net cash provided by financing activites	6,112,521	16,119,500
Effect of exchange rate changes on cash and cash equivalents	(90,254)	(123,182)
Decrease in cash and cash equivalents	(3,054,543)	(1,247,969)
Cash and cash equivalents, beginning of period	17,218,899	13,219,385
Cash and cash equivalents, end of period	$ 14,164,356	$ 11,971,416

Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Significant Accounting Policies [Text Block]

Summary of Significant Accounting Policies

Basis of Presentation of Interim Financial Statements

The accompanying unaudited consolidated financial statements of InnerWorkings, Inc. and subsidiaries (the “Company”) included herein have been prepared to conform to the rules and regulations of the Securities and Exchange Commission (“SEC”) and accounting principles generally accepted in the United States (“GAAP”) for interim financial information. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, all adjustments considered necessary for a fair presentation of the accompanying unaudited financial statements have been included, and all adjustments are of a normal and recurring nature. The operating results for the three and six months ended June 30, 2013 are not necessarily indicative of the results to be expected for the full year of 2013. These condensed interim consolidated financial statements and notes should be read in conjunction with the Company’s Consolidated Financial Statements and Notes thereto as of December 31, 2012 included in the Company’s Annual Report on Form 10-K filed with the SEC on February 28, 2013.

Foreign Currency Translation

The functional currency for the Company’s foreign operations is the local currency. Assets and liabilities of these operations are translated into U.S. currency at the rates of exchange at the balance sheet date. The resulting translation adjustments are included in accumulated other comprehensive income (loss), a separate component of stockholders’ equity. Income and expense items are translated at average monthly rates of exchange. The net realized losses on foreign currency transactions were $0.1 million and immaterial during the three months ended June 30, 2012 and 2013, respectively, and were immaterial and $0.4 million during the six months ended June 30, 2012 and 2013, respectively.

Goodwill and Other Intangibles

Goodwill represents the excess of purchase price and related costs over the value assigned to the net tangible and identifiable intangible assets of businesses acquired. In accordance with ASC 350, Intangibles—Goodwill and Other, goodwill is not amortized, but instead is tested for impairment annually, or more frequently if circumstances indicate a possible impairment may exist. Absent any interim indicators of impairment, the Company has elected to test for goodwill impairment as of December 31 of each year. ASU 2011-08, “Testing Goodwill for Impairment,” permits an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the quantitative goodwill impairment test. If the quantitative test is required, in the first step, the fair value for each reporting unit is compared to its book value including goodwill. In the case that the fair value is less than the book value, a second step is performed which compares the implied fair value of goodwill to the book value of goodwill. The fair value for the goodwill is determined based on the difference between the fair value of the reporting unit and the net fair values of the identifiable assets and liabilities. If the implied fair value of the goodwill is less than the book value of the goodwill, the difference is recognized as an impairment.

The Company defines its two reporting units as North America and International. The provisions of ASU 2011-08 were adopted in the fourth quarter of 2012. Based on the qualitative factors assessed, the Company concluded it was not more likely than not that the fair value of the North America reporting unit was less than its carrying amount primarily because (1) the Company’s overall financial performance has been positive in the face of mixed economic environments and (2) forecasts of operating income and cash flows generated by the North America reporting unit appear sufficient to support the book value of its net assets. However, due to economic factors internationally, it was determined that the quantitative test was necessary for the International reporting unit. No impairment was identified as a result of this test as of December 31, 2012.

The following is a summary of the goodwill balance for each operating segment as of June 30, 2013:

	North America		International		Total
Balance as of December 31, 2012		120,453,194		93,633,686		214,086,880
Goodwill acquired related to 2013 acquisitions		42,322,899		6,764,441		49,087,340
Finalization of purchase accounting for prior year acquisitions		176,886		177,879		354,765
Foreign exchange impact		(46,339)		(1,478,140)		(1,524,479)
Balance as of June 30, 2013	$	162,906,640	$	99,097,866	$	262,004,506

In accordance with ASC 350, Intangibles – Goodwill and Other, the Company amortizes its intangible assets with finite lives over their respective estimated useful lives and reviews for impairment whenever impairment indicators exist. The Company’s intangible assets consist of customer lists, noncompete agreements, trade names and patents. The Company’s customer lists, which have an estimated weighted-average useful life of fourteen years, are being amortized using the economic life method. The Company’s noncompete agreements, trade names and patents are being amortized on the straight-line basis over their estimated weighted-average useful lives of approximately four years, twelve years and ten years, respectively.

The following is a summary of the intangible assets:

	December 31, 2012		June 30, 2013		Weighted Average Life
Customer lists	$	50,008,913	$	54,612,561		14.4 years
Noncompete agreements		1,077,349		1,077,349		3.9 years
Trade names		3,467,655		3,467,655		12.4 years
Patents		38,456		56,896		10.0 years
		54,592,373		59,214,461
Less accumulated amortization		(18,195,508)		(19,847,228)
Intangible assets, net	$	36,396,865	$	39,367,233

Amortization expense related to these intangible assets was $1.3 million and $0.9 million during the three month periods ended June 30, 2012 and 2013, respectively, and $2.2 million and $1.8 million during the six month periods ended June 30, 2012 and 2013, respectively.

The estimated amortization expense for the next five years is as follows:

Remainder of 2013	$	2,117,891
2014		3,997,043
2015		3,797,357
2016		3,649,324
2017		3,502,014
Thereafter		22,303,604
	$	39,367,233

Stock-Based Compensation

The Company accounts for stock-based compensation awards to employees and directors in accordance with ASC 718, Compensation-Stock Compensation. Compensation expense for stock options is measured by determining the fair value using the Black-Scholes option valuation model and is then recognized over the requisite service period of the awards, which is generally the vesting period, on a straight-line basis for the entire award.

Stock-based compensation cost recognized during the period is based on the portion of the share-based payment awards that are ultimately expected to vest. Accordingly, stock-based compensation cost recognized has been reduced for estimated forfeitures. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.

During the six month periods ended June, 2012 and 2013, the Company granted 131,660 and 226,971 options, respectively. In addition, during the six month periods ended June 30, 2012 and 2013, the Company granted 115,361 and 216,649 restricted common shares, respectively. During the six month periods ended June 30, 2012 and 2013, 1,930,048 and 553,838 options were exercised and restricted common shares vested, respectively. The Company recorded stock-based compensation expense of $1.4 million and $1.1 million for the three months ended June 30, 2012 and 2013, respectively, and $2.5 million and $2.1 million for the six months ended June 30, 2012 and 2013, respectively

Acquisitions

6 Months Ended

Jun. 30, 2013

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

Acquisitions

During the second quarter of 2013, the Company acquired 100% of the voting equity interests of one domestic and one international company. Neither of these acquisitions were individually material.

These acquisitions contributed revenues and gross profit which represent approximately 2% of the Company’s consolidated results for the three months ended June 30, 2013. Pro forma results of these acquisitions are not disclosed as they would not have a material impact on the Company’s financial statements.

The following table summarizes the total consideration paid and the amount of identified assets acquired and liabilities assumed at the acquisition dates. At June 30, 2013, the purchase price allocations are preliminary and subject to change as more detailed analyses are completed and additional information about the fair value of assets and liabilities becomes available. Specifically, the Company is finalizing the determination of the fair values of the intangible assets acquired and the contingent consideration liabilities. Changes to these fair values will also impact the amount of goodwill recorded in connection with the acquisitions. These valuations will be completed within one year of the acquisition date.

Cash	$	5,462,557
Contingent consideration		6,924,514
Total consideration transferred	$	12,387,071

Cash and cash equivalents	$	471,106
Accounts receivable		2,878,098
Inventory		136,642
Other assets		126,056
Customer list		1,916,805
Goodwill		9,729,812
Accounts payable		(2,036,060)
Other current liabilities		(263,835)
Deferred income taxes		(571,553)
Total identifiable net assets and goodwill	$	12,387,071

Goodwill generally consists of expected synergies from combining operations of these acquisitions with the Company’s existing operations. Acquisition related costs were included in selling, general and administrative expenses and were immaterial. The goodwill is not expected to be deductible for tax purposes.

Contingent Consideration

In connection with certain of the Company’s acquisitions, contingent consideration is payable in cash or common stock upon the achievement of certain performance measures over future periods. For the acquisitions occurring subsequent to January 1, 2009, the Company has recorded the acquisition date fair value of the contingent consideration liability as additional purchase price. The Company has recorded $109.5 million in contingent consideration at June 30, 2013 related to these arrangements. Any adjustments made to the fair value of the contingent consideration liability subsequent to the acquisition date will be recorded in the Company’s results of operations.

As of June 30, 2013, the potential maximum contingent payments are payable as follows:

	Cash		Common Stock		Total
2013	$	4,598,333	$	332,500	$	4,930,833
2014		11,726,235		16,412,963		28,139,198
2015		14,746,860		19,877,910		34,624,770
2016		31,411,905		27,493,645		58,905,550
2017		-		20,050,000		20,050,000
	$	62,483,333	$	84,167,018	$	146,650,351

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

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+ Details

Income Taxes

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

Income Taxes

The Company’s effective income tax rate was 33.9% and 31.6% in the three months ended June 30, 2012 and 2013, respectively, and 34.1% and 23.3% in the six months ended June 30, 2012 and 2013, respectively. The company’s effective income tax rate differs from the U.S. federal statutory rate each year due to certain operations that are subject to tax incentives, state and local taxes, and foreign taxes that are different than the U.S. federal statutory rate. In addition, the effective tax rate can be impacted each period by discrete factors and events.

The decrease in the effective tax rate for the six months ended June 30, 2013 was primarily due to the 2012 R&D tax credit which was recognized in the first quarter of 2013. On January 2, 2013, the President signed the American Taxpayer Relief Act of 2012. The legislation retroactively extended the R&D tax credit for two years, from January 1, 2012 through December 31, 2013. The company’s effective income tax rate for the six months ended June 30, 2013 reflected the 2012 R&D tax credit of $0.3 million.Excluding the impact of this discrete event, the effective tax rate for the six months ended June 30, 2013 was 31.8% which decreased from the prior year due to international expansion into countries with lower statutory tax rates, as well as the 2013 R&D tax credit.

Earnings Per Share

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Earnings Per Share

Basic earnings per common share is calculated by dividing net income by the weighted average number of common shares outstanding. Diluted earnings per share is calculated by dividing net income by the weighted average shares outstanding plus share equivalents that would arise from the exercise of stock options and vesting of restricted common shares. Shares which would have an antidilutive effect on diluted earnings per share are excluded from the calculation. There were 742,331 and 1,328,086 antidilutive shares excluded for the three month periods ended June 30, 2012 and 2013, respectively, and 742,331 and 1,125,995 antidilutive shares excluded for the six month periods ended June 30 2012 and 2013. The computations of basic and diluted earnings per common share for the three and six months ended June 30, 2012 and 2013 are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2013		2012		2013
Numerator:
Net Income	$	4,474,400	$	1,903,345	$	8,162,088	$	2,798,475

Denominator:
Denominator for basic earnings per share—weighted-average shares		48,617,646		50,728,372		47,904,961		50,533,521
Effect of dilutive securities:
Employee stock options and restricted common shares		2,089,310		1,237,167		2,649,681		1,512,479

Denominator for dilutive earnings per share		50,706,956		51,965,539		50,554,642		52,046,000

Basic earnings per share	$	0.09	$	0.04	$	0.17	$	0.06
Diluted earnings per share	$	0.09	$	0.04	$	0.16	$	0.05

Accumulated Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2013

Accumulated Other Comprehensive Income (Loss), Net Of Tax [Abstract]

Comprehensive Income (Loss) Note [Text Block]

Accumulated Other Comprehensive Income (Loss)

The table below presents changes in the components of accumulated other comprehensive income (loss) for the six months ended June 30, 2013:

	Foreign currency		Unrealized holding gains on available- for-sale securities		Total
Balance as of December 31, 2012	$	204,124	$	1,338	$	205,462
Other comprehensive income before reclassifications		(2,048,128)		-		(2,048,128)
Amounts reclassified from accumulated other comprehensive income		-		(1,338)		(1,338)
Net current-period other comprehensive income		(2,048,128)		(1,338)		(2,049,466)
Balance as of June 30, 2013	$	(1,844,004)	$	-	$	(1,844,004)

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

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-URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e709-108580

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Reclassification Adjustments
-URI http://asc.fasb.org/extlink&oid=6522872

+ Details

Related Party Transactions

6 Months Ended

Jun. 30, 2013

Related Party Transactions

Investment in Echo Global Logistics, Inc.

As previously disclosed, in February 2005 the Company acquired shares of common stock of Echo Global Logistics, Inc. (“Echo”), a technology enabled transportation and logistics business process outsourcing firm.Two former members of our Board of Directors, Eric P. Lefkofsky and Peter J. Barris, were also directors of Echo during 2012. In addition, Jack M. Greenberg and Eric D. Belcher have a direct and/or an indirect ownership interest in Echo. Following Echo’s initial public offering in October 2009, the Company has periodically sold shares of Echo common stock. The Company sold 13,655 and 28,398 of its shares of Echo’s common stock for $249,582 and $499,122 ,respectively, recorded a gain on sale of investment of $247,875 and $495,572 during the three and six months ended June 30, 2012.respectively. During the first quarter of 2013, the Company sold the remaining 123 shares of Echo’s common stock, and the proceeds and realized gain were immaterial. The Company classified its shares of Echo’s common stock as “available for sale” in accordance with ASC 320, Investments—Debt and Equity Securities. The investment was stated at fair value based on market prices, with any unrealized gains and losses included as a separate component of stockholders’ equity. Any realized gains and losses and interest and dividends have been determined using the specific identification method and included in other income. At June 30, 2013, the Company no longer owned any shares of Echo’s common stock.

Agreements and Services with Related Parties

The Company provides print procurement services to Echo. The total amount billed for such print procurement services was $25,044 and $20,668 during the three months ended June 30, 2012 and 2013, respectively, and $52,185 and $54,193 during the six months ended June 30, 2012 and 2013, respectively. In addition, Echo has provided transportation services to the Company. As consideration for these services, Echo billed the Company $2,944,296 and $2,344,162 during the three months ended June 30, 2012 and 2013, respectively, and $5,099,982 and $5,513,162 during the six months ended June 30, 2012 and 2013, respectively. The net amount payable to Echo at June 30, 2013 was $255,368.

The Company provides print procurement services to Arthur J. Gallagher & Co. J. Patrick Gallagher, Jr., who was appointed to the Company’s Board of Directors in August 2011, is the Chairman, President and Chief Executive Officer of Arthur J. Gallagher & Co. and has a direct ownership interest in Arthur J. Gallagher & Co. The total amount billed for such print procurement services was $123,145 and $190,607 during the three months ended June 30, 2012 and 2013, respectively, and $262,219 and $280,933 during the six months ended June 30, 2012 and 2013, respectively. Additionally, Arthur J. Gallagher & Co. provides insurance brokerage and risk management services to the Company. As consideration of these services, Arthur J. Gallagher & Co. billed the Company $52,400 and $179,238 during the three months ended June 30, 2012 and 2013, respectively, and $52,400 and $277,546 during the six months ended June 30, 2012 and 2013, respectively. The net amount receivable from Arthur J. Gallagher & Co. at June 30, 2013 was $45,270.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References + Details

Fair Value Measurement

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

Fair Value Measurement

ASC 820 includes a fair value hierarchy that is intended to increase consistency and comparability in fair value measurements and related disclosures. The fair value hierarchy is based on observable or unobservable inputs to valuation techniques that are used to measure fair value. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon its own market assumptions.

The fair value hierarchy consists of the following three levels:

	•	Level 1: Inputs are quoted prices in active markets for identical assets or liabilities.
	•	Level 2: Inputs are quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs other than quoted prices that are observable and market-corroborated inputs, which are derived principally from or corroborated by observable market data.
	•	Level 3: Inputs that are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable.

The Company's potential contingent consideration payments relating to acquisitions occurring subsequent to January 1, 2009 are its only Level 3 liabilities as of December 31, 2012 and June 30, 2013. The fair value of the liabilities determined by this analysis is primarily driven by the probability of reaching the performance measures required by the purchase agreements and the associated discount rate. Probabilities are estimated by reviewing financial forecasts and assessing the likelihood of reaching the required performance measures based on factors specific to each acquisition as well as the Company’s historical experience with similar arrangements. If an acquisition reaches the required performance measure, the estimated probability would be increased to 100%, and if the measure is not reached, the probability would be reduced to reflect the amount earned, if any, depending on the terms of the agreement. Discount rates are estimated by using the local government bond yields plus the Company’s credit spread. A one percentage point increase in the discount rate across all contingent consideration liabilities would result in a decrease to the fair value of approximately $2.1 million.

The following table sets forth the Company’s financial assets and financial liabilities measured at fair value on a recurring basis and the basis of measurement at December 31, 2012 and June 30, 2013, respectively:

At June 30, 2013	Total Fair Value Measurement		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Money market funds(1)	$	667,174	$	667,174	$	-	$	-
Liabilities:
Contingent consideration	$	(109,491,415)	$	-	$	-	$	(109,491,415)

At December 31, 2012	Total Fair Value Measurement		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Money market funds(1)	$	667,045	$	667,045	$	-	$	-
Liabilities:
Contingent consideration	$	(71,664,770)	$	-	$	-	$	(71,664,770)

(1)

Included in cash and cash equivalents on the balance sheet.

The following table provides a reconciliation of the beginning and ending balances for the liabilities measured at fair value using significant unobservable inputs (Level 3):

	Fair Value Measurements at Reporting Date Using Significant Unobservable Inputs (Level 3)
	Contingent Consideration
Balance as of December 31, 2012		(71,664,770)
Contingent consideration from 2013 acquisitions		(42,924,165)
Contingent consideration payments paid in cash		720,821
Contingent consideration payments paid in common stock		614,216
Reclassified to Due to seller		1,628,512
Change in fair value (1)		1,040,557
Foreign exchange impact (2)		1,093,414
Balance as of June 30, 2013		(109,491,415)

(1)

Adjustments to original contingent consideration obligations recorded were the result of using revised financial forecasts and updated fair value measurements. These changes are recognized within selling, general and administrative expenses on the consolidated statement of comprehensive income.

(2)

Changes in the contingent consideration liability which are caused by foreign exchange rate fluctuations are recognized in other comprehensive income.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Commitments and Contingencies

6 Months Ended

Jun. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure [Text Block]

Commitments and Contingencies

In November 2010, in connection with the Circuit City Stores, Inc. (“Circuit City”) bankruptcy proceedings, the Trustee of the Circuit City Liquidating Trust (the “Trust”) filed a lawsuit against the Company in United States Bankruptcy Court in the Eastern District of Virginia for the avoidance of payments as allegedly preferential transfers of $3.2 million paid to the Company during the 90 days preceding the filing of the bankruptcy petition of Circuit City on November 10, 2008. In January 2013, the Company and the Trust entered into a settlement agreement resolving this preference claim as well the Company’s administrative and general unsecured claims against the Trust for a net payment to the Trust of $900,000.

In May 2011, Her Majesty’s Revenue and Customs (“HMRC”) contacted the Company’s United Kingdom subsidiary, InnerWorkings Europe Limited (formerly Etrinsic), to request information relating to its position that certain printed matter and direct mail products are zero-rated under the U.K.’s VAT law. Although Etrinsic has voluntarily exchanged information with the HMRC as to its position that the products at issue are zero-rated for VAT pursuant to UK law and HMRC’s guidance, HMRC has stated that it disagrees with Etrinsic’s position and in March 2012, HMRC issued Etrinsic a VAT assessment of £2,316,008 for VAT periods covering the 2008, 2009, 2010 and 2011 calendar years. Etrinsic sought independent review of the assessment with HMRC, and HMRC upheld the assessment. Etrinsic appealed the HMRC’s assessment at the UK Tax Tribunal. In order to appeal the claim, the Company paid £2,316,008 to the HMRC on July 6, 2012. This payment was included in other current assets. In the fourth quarter of 2012, the Company accrued a loss reserve reflecting an anticipated settlement of £925,000, inclusive of all VAT periods for the 2008 through 2012 calendar years. In July 2013, the Company finalized settlement with the HMRC and received a refund of the amounts paid to HMRC in July 2012 less the settlement amount which was not materially different than the estimated reserve of £925,000.

In December 2010, e-Lynxx Corporation filed a complaint against the Company and numerous other defendants for patent infringement in the United States District Court for the Middle District of Pennsylvania. As to the Company, the complaint alleges, among other things, that certain aspects of the Company’s PPM4 TM technology infringe on two patents owned by e-Lynxx purporting to cover a system and method for competitive pricing and procurement of customized goods and services, and seeks monetary damages, interest, costs, attorneys’ fees, punitive damages and a permanent injunction. In May 2013, e-Lynxx asserted that the monetary damages it seeks from the Company are in the range of $35 million to $88 million for the period from May 2009 through December 2012; e-Lynxx has not yet specified damages sought for 2013 and future periods. The Company disputes the allegations contained in e-Lynxx’s complaint and intends to vigorously defend this matter. Specifically, the Company contends that the patents at issue are invalid and not infringed, and, therefore, e-Lynxx is not entitled to any relief and the complaint should be dismissed. Further, even if e-Lynxx could establish liability, the Company contends that e-Lynxx is not entitled to the excessive monetary relief it seeks. On July 25, 2013, the Court granted the Company’s motion for summary judgment, finding that the Company did not infringe the patents-in-suit. The time for filing an appeal of this judgment has not yet expired. The Company believes that an unfavorable outcome is reasonably possible or remote but not probable, and therefore, no reserve has been recorded for a potential loss. The loss that is reasonably possible or remote cannot be estimated.

In October 2012, a former sales employee of the Company filed an arbitration claim against the Company arising from the Company’s termination of his employment in November 2011. He alleges disability discrimination, defamation, breach of employment agreement, invasion of privacy, and wage payment claims, and seeks monetary damages of $2.75 million, interest, punitive damages, injunctive relief, declaratory relief, and attorneys’ fees and costs. The Company disputes these allegations and intends to vigorously defend itself in the matter. Specifically, the Company contends that it lawfully terminated his employment for cause, and, therefore, that he is not entitled to any relief and his claims should be dismissed. The matter is currently in the discovery phase, and an arbitration hearing is scheduled for November 2013.

Recently Issued Accounting Pronouncements

6 Months Ended

Jun. 30, 2013

Accounting Changes and Error Corrections [Abstract]

New Accounting Pronouncements and Changes in Accounting Principles [Text Block]

Recently Issued Accounting Pronouncements

In February 2012, the FASB issued ASU 2013-02 which requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under GAAP to be reclassified in its entirety to net income. For other amounts that are not required under GAAP to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures required under GAAP that provide additional detail about those amounts. These requirements are effective for public companies for reporting periods beginning after December 15, 2012. The Company adopted ASU 2013-02 in the first quarter of 2013 and included the required disclosures in Note 5.

- Definition

The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6507316

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Direct Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6510796

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6515603

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-URI http://asc.fasb.org/extlink&oid=6523989

Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 01
-Paragraph b
-Subparagraph 6
-Article 10

+ Details

Business Segments

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

10.

Business Segments

The Company is organized and managed as two business segments, North America and International, and is viewed as two operating segments by the chief operating decision maker for purposes of resource allocation and assessing performance. “Other” consists of shared service activities and unallocated corporate expenses.

Management evaluates the performance of its operating segments based on net revenues and Adjusted EBITDA which is a non-GAAP financial measure. The accounting policies of each of the operating segments are the same as those described in the summary of significant accounting policies in Note 1. Adjusted EBITDA represents income from operations with the addition of depreciation and amortization and stock-based compensation expense, less income/expense related to changes in the fair value of contingent consideration liabilities. Management does not evaluate the performance of its operating segments using asset measures.

The table below presents financial information for the Company’s reportable operating segments and Other for the three and six month periods noted (in thousands):

	North America		International		Other		Total
Three Months Ended June 30, 2013:
Net revenue from third parties	$	162,135	$	48,741	$	-	$	210,876
Net revenue from other segments		2		589		(591)		-
Total net revenues		162,137		49,330		(591)		210,876
Adjusted EBITDA (1)		12,978		287		(7,914)		5,351
Three Months Ended June 30, 2012:
Net revenue from third parties	$	161,762	$	39,635	$	-	$	201,397
Net revenue from other segments		23		233		(256)		-
Total net revenues		161,785		39,868		(256)		201,397
Adjusted EBITDA (1)		16,872		1,561		(6,561)		11,872

	North America		International		Other		Total
Six Months Ended June 30, 2013:
Net revenue from third parties	$	327,094	$	88,098	$	-	$	415,192
Net revenue from other segments		20		855		(875)		-
Total net revenues		327,114		88,953		(875)		415,192
Adjusted EBITDA (1)		25,760		475		(15,046)		11,189
Six Months Ended June 30, 2012:
Net revenue from third parties	$	318,746	$	71,198	$	-	$	389,944
Net revenue from other segments		66		632		(698)		-
Total net revenues		318,812		71,830		(698)		389,944
Adjusted EBITDA (1)		31,623		1,853		(12,046)		21,430

(1)

Adjusted EBITDA, which represents income from operations with the addition of depreciation and amortization, stock-based compensation expense and income/expense related to changes in the fair value of contingent consideration liabilities, is considered a non-GAAP financial measure under SEC regulations. Income from operations is the most directly comparable financial measure calculated in accordance with GAAP. The Company presents this measure as supplemental information to help investors better understand trends in its business results over time. The Company's management team uses Adjusted EBITDA to evaluate the performance of the business. Adjusted EBITDA is not equivalent to any measure of performance required to be reported under GAAP, nor should this data be considered an indicator of the Company's overall financial performance and liquidity. Moreover, the Adjusted EBITDA definition the Company uses may not be comparable to similarly titled measures reported by other companies.

The table below reconciles the total of the reportable segments' Adjusted EBITDA and the Adjusted EBITDA included in Other to income before income taxes (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2013		2012		2013

Adjusted EBITDA	$	11,872	$	5,351	$	21,430	$	11,189
Depreciation and amortization		(2,937)		(2,648)		(5,381)		(5,114)
Stock-based compensation		(1,404)		(1,081)		(2,451)		(2,054)
Change in fair value of contingent consideration		(266)		1,649		(467)		1,041
Total other income (expense)		(494)		(489)		(754)		(1,413)

Income before income taxes	$	6,771	$	2,782	$	12,377	$	3,649

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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+ Details

Subsequent Event

6 Months Ended

Jun. 30, 2013

Subsequent Events [Abstract]

Subsequent Events [Text Block]

11.

Subsequent Event

On July 25, 2013, the Company acquired 100% of the outstanding shares of capital stock and other equity interests of the U.S. and international businesses of EYELEVEL, a leading global provider of permanent retail displays and store fixtures, pursuant to two purchase agreements for an aggregate purchase price of up to $54,000,000 (the “Consideration”). The Consideration will be payable as follows: (A) $11,900,000 paid in cash at closing, subject to an adjustment for estimated working capital; (B) a holdback of $600,000 payable in cash pending confirmation of actual working capital; (C) up to $17,500,000 to be paid in shares of Company Common Stock if certain financial milestones are achieved during annual measurement periods between July 1, 2013 and June 30, 2017; and (D) up to $24,000,000 payable in shares of Company Common Stock if Cumulative EBITDA (as defined in the purchase agreements) equals or exceeds $40,000,000 for the period beginning on July 1, 2013 and ending on June 30, 2017; provided that if Cumulative EBITDA falls below $40,000,000 but equals or exceeds $30,000,000, the sellers will be entitled to receive a partial payment as set forth in the purchase agreements. As a result of this acquisition, EYELEVEL will extend the Company’s permanent display capabilities to international markets. EYELEVEL’s current and future clients will have the ability to benefit from the Company’s enterprise print management services. The purchase price allocation is not yet finalized and will be prepared during the third quarter. Results of operations for EYELEVEL will be included in our consolidated financial statements from the date of acquisition.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation of Interim Financial Statements

Foreign Currency Transactions and Translations Policy [Policy Text Block]

Foreign Currency Translation

Goodwill and Intangible Assets, Policy [Policy Text Block]

Goodwill and Other Intangibles

The following is a summary of the goodwill balance for each operating segment as of June 30, 2013:

	North America		International		Total
Balance as of December 31, 2012		120,453,194		93,633,686		214,086,880
Goodwill acquired related to 2013 acquisitions		42,322,899		6,764,441		49,087,340
Finalization of purchase accounting for prior year acquisitions		176,886		177,879		354,765
Foreign exchange impact		(46,339)		(1,478,140)		(1,524,479)
Balance as of June 30, 2013	$	162,906,640	$	99,097,866	$	262,004,506

The following is a summary of the intangible assets:

	December 31, 2012		June 30, 2013		Weighted Average Life
Customer lists	$	50,008,913	$	54,612,561		14.4 years
Noncompete agreements		1,077,349		1,077,349		3.9 years
Trade names		3,467,655		3,467,655		12.4 years
Patents		38,456		56,896		10.0 years
		54,592,373		59,214,461
Less accumulated amortization		(18,195,508)		(19,847,228)
Intangible assets, net	$	36,396,865	$	39,367,233

The estimated amortization expense for the next five years is as follows:

Remainder of 2013	$	2,117,891
2014		3,997,043
2015		3,797,357
2016		3,649,324
2017		3,502,014
Thereafter		22,303,604
	$	39,367,233

Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]

Stock-Based Compensation

Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Schedule of Goodwill [Table Text Block]

The following is a summary of the goodwill balance for each operating segment as of June 30, 2013:

	North America		International		Total
Balance as of December 31, 2012		120,453,194		93,633,686		214,086,880
Goodwill acquired related to 2013 acquisitions		42,322,899		6,764,441		49,087,340
Finalization of purchase accounting for prior year acquisitions		176,886		177,879		354,765
Foreign exchange impact		(46,339)		(1,478,140)		(1,524,479)
Balance as of June 30, 2013	$	162,906,640	$	99,097,866	$	262,004,506

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The following is a summary of the intangible assets:

	December 31, 2012		June 30, 2013		Weighted Average Life
Customer lists	$	50,008,913	$	54,612,561		14.4 years
Noncompete agreements		1,077,349		1,077,349		3.9 years
Trade names		3,467,655		3,467,655		12.4 years
Patents		38,456		56,896		10.0 years
		54,592,373		59,214,461
Less accumulated amortization		(18,195,508)		(19,847,228)
Intangible assets, net	$	36,396,865	$	39,367,233

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

The estimated amortization expense for the next five years is as follows:

Remainder of 2013	$	2,117,891
2014		3,997,043
2015		3,797,357
2016		3,649,324
2017		3,502,014
Thereafter		22,303,604
	$	39,367,233

Acquisitions (Tables)

6 Months Ended

Jun. 30, 2013

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

Cash	$	5,462,557
Contingent consideration		6,924,514
Total consideration transferred	$	12,387,071

Cash and cash equivalents	$	471,106
Accounts receivable		2,878,098
Inventory		136,642
Other assets		126,056
Customer list		1,916,805
Goodwill		9,729,812
Accounts payable		(2,036,060)
Other current liabilities		(263,835)
Deferred income taxes		(571,553)
Total identifiable net assets and goodwill	$	12,387,071

Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]

As of June 30, 2013, the potential maximum contingent payments are payable as follows:

	Cash		Common Stock		Total
2013	$	4,598,333	$	332,500	$	4,930,833
2014		11,726,235		16,412,963		28,139,198
2015		14,746,860		19,877,910		34,624,770
2016		31,411,905		27,493,645		58,905,550
2017		-		20,050,000		20,050,000
	$	62,483,333	$	84,167,018	$	146,650,351

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The computations of basic and diluted earnings per common share for the three and six months ended June 30, 2012 and 2013 are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2013		2012		2013
Numerator:
Net Income	$	4,474,400	$	1,903,345	$	8,162,088	$	2,798,475

Denominator:
Denominator for basic earnings per share—weighted-average shares		48,617,646		50,728,372		47,904,961		50,533,521
Effect of dilutive securities:
Employee stock options and restricted common shares		2,089,310		1,237,167		2,649,681		1,512,479

Denominator for dilutive earnings per share		50,706,956		51,965,539		50,554,642		52,046,000

Basic earnings per share	$	0.09	$	0.04	$	0.17	$	0.06
Diluted earnings per share	$	0.09	$	0.04	$	0.16	$	0.05

Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2013

Accumulated Other Comprehensive Income (Loss), Net Of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The table below presents changes in the components of accumulated other comprehensive income (loss) for the six months ended June 30, 2013:

	Foreign currency		Unrealized holding gains on available- for-sale securities		Total
Balance as of December 31, 2012	$	204,124	$	1,338	$	205,462
Other comprehensive income before reclassifications		(2,048,128)		-		(2,048,128)
Amounts reclassified from accumulated other comprehensive income		-		(1,338)		(1,338)
Net current-period other comprehensive income		(2,048,128)		(1,338)		(2,049,466)
Balance as of June 30, 2013	$	(1,844,004)	$	-	$	(1,844,004)

Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2013

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

At June 30, 2013	Total Fair Value Measurement		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Money market funds(1)	$	667,174	$	667,174	$	-	$	-
Liabilities:
Contingent consideration	$	(109,491,415)	$	-	$	-	$	(109,491,415)

At December 31, 2012	Total Fair Value Measurement		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Money market funds(1)	$	667,045	$	667,045	$	-	$	-
Liabilities:
Contingent consideration	$	(71,664,770)	$	-	$	-	$	(71,664,770)

(1)

Included in cash and cash equivalents on the balance sheet.

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following table provides a reconciliation of the beginning and ending balances for the liabilities measured at fair value using significant unobservable inputs (Level 3):

	Fair Value Measurements at Reporting Date Using Significant Unobservable Inputs (Level 3)
	Contingent Consideration
Balance as of December 31, 2012		(71,664,770)
Contingent consideration from 2013 acquisitions		(42,924,165)
Contingent consideration payments paid in cash		720,821
Contingent consideration payments paid in common stock		614,216
Reclassified to Due to seller		1,628,512
Change in fair value (1)		1,040,557
Foreign exchange impact (2)		1,093,414
Balance as of June 30, 2013		(109,491,415)

(1)

(2)

Changes in the contingent consideration liability which are caused by foreign exchange rate fluctuations are recognized in other comprehensive income.

Business Segments (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The table below presents financial information for the Company’s reportable operating segments and Other for the three and six month periods noted (in thousands):

	North America		International		Other		Total
Three Months Ended June 30, 2013:
Net revenue from third parties	$	162,135	$	48,741	$	-	$	210,876
Net revenue from other segments		2		589		(591)		-
Total net revenues		162,137		49,330		(591)		210,876
Adjusted EBITDA (1)		12,978		287		(7,914)		5,351
Three Months Ended June 30, 2012:
Net revenue from third parties	$	161,762	$	39,635	$	-	$	201,397
Net revenue from other segments		23		233		(256)		-
Total net revenues		161,785		39,868		(256)		201,397
Adjusted EBITDA (1)		16,872		1,561		(6,561)		11,872

	North America		International		Other		Total
Six Months Ended June 30, 2013:
Net revenue from third parties	$	327,094	$	88,098	$	-	$	415,192
Net revenue from other segments		20		855		(875)		-
Total net revenues		327,114		88,953		(875)		415,192
Adjusted EBITDA (1)		25,760		475		(15,046)		11,189
Six Months Ended June 30, 2012:
Net revenue from third parties	$	318,746	$	71,198	$	-	$	389,944
Net revenue from other segments		66		632		(698)		-
Total net revenues		318,812		71,830		(698)		389,944
Adjusted EBITDA (1)		31,623		1,853		(12,046)		21,430

(1)

Schedule Of Earnings Before Interest Tax Depreciation And Amortization Reconciliation [Table Text Block]

The table below reconciles the total of the reportable segments' Adjusted EBITDA and the Adjusted EBITDA included in Other to income before income taxes (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2013		2012		2013

Adjusted EBITDA	$	11,872	$	5,351	$	21,430	$	11,189
Depreciation and amortization		(2,937)		(2,648)		(5,381)		(5,114)
Stock-based compensation		(1,404)		(1,081)		(2,451)		(2,054)
Change in fair value of contingent consideration		(266)		1,649		(467)		1,041
Total other income (expense)		(494)		(489)		(754)		(1,413)

Income before income taxes	$	6,771	$	2,782	$	12,377	$	3,649

Summary of Significant Accounting Policies (Details)	6 Months Ended
Summary of Significant Accounting Policies (Details)	Jun. 30, 2013 USD ($)
Balance	$ 214,086,880
Goodwill acquired related to 2013 acquisitions	49,087,340
Finalization of purchase accounting for prior year acquisitions	354,765
Foreign exchange impact	(1,524,479)
Balance	262,004,506
North America [Member]
Balance	120,453,194
Goodwill acquired related to 2013 acquisitions	42,322,899
Finalization of purchase accounting for prior year acquisitions	176,886
Foreign exchange impact	(46,339)
Balance	162,906,640
International [Member]
Balance	93,633,686
Goodwill acquired related to 2013 acquisitions	6,764,441
Finalization of purchase accounting for prior year acquisitions	177,879
Foreign exchange impact	(1,478,140)
Balance	$ 99,097,866