Consolidated Balance Sheets (Unaudited) - Scenario, Unspecified [Domain] - USD ($) $ in Thousands		Jun. 30, 2015		Dec. 31, 2014
Current assets:
Cash and cash equivalents		$ 105,093		$ 9,751
Accounts receivable, net		223,903		203,189
Prepaid expenses		13,633		13,805
Deferred tax assets		4,034		3,776
Other current assets		1,179		1,437
Total current assets		347,842		231,958
Property, equipment and leasehold improvements, net		17,485		15,726
Goodwill	[1]	496,482		495,679
Intangible assets, net		84,196		102,583
Long-term accounts receivable, less current portion		52,109		46,401
Deferred tax assets, noncurrent		50,682		29,682
Deferred financing costs, net		10,096		6,169
Other assets		2,293		1,946
Total assets		1,061,185	[2],[3]	930,144
Current liabilities:
Accounts payable		57,257		57,033
Accrued expenses		51,881		53,978
Accrued interest expense		5,860		10,667
Deferred revenue		4,908		6,402
Current portion of contingent earnout obligation		4,567		4,473
Current portion of working capital facilities				40,396
Other current liabilities		9,250		6,950
Total current liabilities		133,723		179,899
Senior unsecured notes payable		500,000		250,000
Senior secured revolving credit facility and working capital facilities, less current portion		41,730		143,853
Long-term contingent earnout obligation, less current portion				2,114
Deferred tax liability, noncurrent		9,554
Other long-term liabilities		12,505		9,403
Total liabilities		$ 697,512		$ 585,269
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.0001 par value; Authorized 50,000 shares; no shares issued and outstanding at December 31, 2014 and June 30, 2015		$ 0		$ 0
Common stock, $0.0001 par value; Authorized 250,000 shares; issued and outstanding 40,371 and 41,537 shares at December 31, 2014 and June 30, 2015, respectively		4		4
Additional paid-in capital		432,645		403,945
Accumulated other comprehensive loss		(18,439)		(14,376)
Accumulated deficit		(42,049)		(36,210)
Treasury stock, at cost; Outstanding 905 shares at December 31, 2014 and June 30, 2015		(8,488)		(8,488)
Total stockholders’ equity		363,673		344,875
Total liabilities and stockholders' equity		$ 1,061,185		$ 930,144

[1] Goodwill recorded in connection with certain tax benefits to be realized in the Company's U.S. income tax returns has been reflected in the United States segment.

[2] For segment purposes, the Company defines "segment profit" as earnings before interest expenses, income taxes, depreciation and amortization, share-based compensation expenses, acquisition related transaction costs and other expenses. A consolidated reconciliation from segment profit to income from operations is included below.

[3] Total assets and long-lived assets include goodwill. Goodwill recorded in connection with certain tax benefits to be realized in the Company's U.S. income tax returns has been reflected in the United States segment.