Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Details) - Condensed Consolidating Balance Sheet (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013	Jun. 30, 2013		Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 7,891		$ 12,829	$ 9,167		$ 8,627
Accounts receivable, net	202,815		169,905
Prepaid expenses	9,841		5,785
Deferred tax assets	1,817		433
Other current assets	1,279		1,298
Total current assets	223,643		190,250
Property, equipment and leasehold improvements, net	12,747		10,950
Goodwill	509,884		369,312
Intangible assets, net	134,524		94,864
Long-term accounts receivable, less current portion	44,533		35,952
Deferred tax assets, noncurrent	15,008		21,491
Deferred financing costs, net	7,290		8,193
Other assets	2,063		1,501
Total assets	949,692	[1],[2],[3]	732,513	717,459	[1],[2],[3]
Current liabilities:
Accounts payable	61,745		52,672
Accrued expenses	44,509		38,448
Accrued interest expense	10,671		10,431
Deferred revenue	6,119		5,795
Current portion of subordinated unsecured notes payable			318
Current portion of contingent earnout obligation	6,529		2,032
Current portion of working capital facilities	40,410
Other current liabilities	10,442		6,438
Total current liabilities	180,425		116,134
Senior unsecured notes payable	250,000		250,000
Senior revolving credit facility and working capital facilities	187,022		82,970
Long-term contingent earnout obligation, less current portion	5,128		2,373
Other long-term liabilities	9,144		8,165
Total liabilities	631,719		459,642
Commitments and contingencies
Stockholders’ equity (deficit)	317,973		272,871
Total liabilities and stockholders' equity (deficit)	949,692		732,513
Consolidation, Eliminations [Member]
Current assets:
Intercompany receivable	(47,137)		(29,551)
Deferred tax assets	(4)		(4)
Total current assets	(47,141)		(29,555)
Investment in subsidiaries	(818,503)		(631,836)
Intercompany notes receivable	(349,764)		(349,652)
Deferred financing costs, net			(8,100)
Total assets	(1,215,408)		(1,019,143)
Current liabilities:
Intercompany payable	(47,137)		(29,551)
Deferred tax liability, noncurrent	(4)		(4)
Total current liabilities	(47,141)		(29,555)
Intercompany notes payable	(349,764)		(349,652)
Total liabilities	(396,905)		(379,207)
Commitments and contingencies
Stockholders’ equity (deficit)	(818,503)		(639,936)
Total liabilities and stockholders' equity (deficit)	(1,215,408)		(1,019,143)
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	999		760	1,570		4,125
Accounts receivable, net	59,495		46,828
Intercompany receivable	36,466		19,120
Prepaid expenses	3,880		2,889
Deferred tax assets	1,821		437
Other current assets	0		61
Total current assets	102,661		70,095
Property, equipment and leasehold improvements, net	8,517		6,760
Investment in subsidiaries	215,156		217,034
Intercompany notes receivable	174,882		174,826
Goodwill	385,144		259,316
Intangible assets, net	79,039		37,172
Long-term accounts receivable, less current portion	0
Deferred tax assets, noncurrent	8,283		15,470
Deferred financing costs, net	7,226		8,100
Other assets	585		497
Total assets	981,493		789,270
Current liabilities:
Accounts payable	20,834		17,524
Intercompany payable	10,671		10,431
Accrued expenses	14,945		10,839
Accrued interest expense	0
Deferred revenue	305		100
Current portion of subordinated unsecured notes payable			318
Deferred tax liability, noncurrent	0
Current portion of contingent earnout obligation	0
Other current liabilities	5,136		2,116
Total current liabilities	51,891		41,328
Senior unsecured notes payable	0
Senior revolving credit facility and working capital facilities			0
Intercompany notes payable	174,882		174,826
Long-term contingent earnout obligation, less current portion	0
Other long-term liabilities	1,631		1,791
Total liabilities	228,404		217,945
Commitments and contingencies
Stockholders’ equity (deficit)	753,089		571,325
Total liabilities and stockholders' equity (deficit)	981,493		789,270
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	6,892		12,069	7,597		4,502
Accounts receivable, net	143,320		123,077
Prepaid expenses	5,961		2,896
Other current assets	1,279		1,237
Total current assets	157,452		139,279
Property, equipment and leasehold improvements, net	4,230		4,190
Goodwill	124,740		109,996
Intangible assets, net	55,485		57,692
Long-term accounts receivable, less current portion	44,533		35,952
Deferred tax assets, noncurrent	6,725		6,021
Deferred financing costs, net	64		93
Other assets	1,478		1,004
Total assets	394,707		354,227
Current liabilities:
Accounts payable	40,911		35,148
Intercompany payable	36,466		19,120
Accrued expenses	29,564		27,609
Deferred revenue	5,814		5,695
Deferred tax liability, noncurrent	4		4
Current portion of contingent earnout obligation	6,529		2,032
Current portion of working capital facilities	40,410
Other current liabilities	5,306		4,322
Total current liabilities	165,004		93,930
Senior revolving credit facility and working capital facilities			37,943
Intercompany notes payable	174,882		174,826
Long-term contingent earnout obligation, less current portion	5,128		2,373
Other long-term liabilities	7,513		6,374
Total liabilities	352,527		315,446
Commitments and contingencies
Stockholders’ equity (deficit)	42,180		38,781
Total liabilities and stockholders' equity (deficit)	394,707		354,227
Parent Company [Member]
Current assets:
Intercompany receivable	10,671		10,431
Total current assets	10,671		10,431
Investment in subsidiaries	603,347		414,802
Intercompany notes receivable	174,882		174,826
Deferred financing costs, net			8,100
Total assets	788,900		608,159
Current liabilities:
Accrued interest expense	10,671		10,431
Total current liabilities	10,671		10,431
Senior unsecured notes payable	250,000		250,000
Senior revolving credit facility and working capital facilities	187,022		45,027
Total liabilities	447,693		305,458
Commitments and contingencies
Stockholders’ equity (deficit)	341,207		302,701
Total liabilities and stockholders' equity (deficit)	$ 788,900		$ 608,159

[1] 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.

[2] Long-lived assets are noncurrent assets excluding deferred tax assets and deferred financing costs.

[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.