Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Details) - Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014
Condensed Income Statements, Captions [Line Items]
Revenues	$ 206,033		$ 204,078	$ 611,087		$ 573,551
Costs and expenses:
Costs of revenues	134,446		130,597	399,047		366,483
Selling, general and administrative expenses	40,455		43,534	125,328		126,652
Depreciation and amortization	12,997	[1]	15,705	41,574	[1]	44,905
Total costs and expenses	187,898		189,836	565,949		538,040
Income from operations	18,135		14,242	45,138		35,511
Interest and other expenses, net	8,000		8,355	44,571		24,027
Income (loss) before income taxes	10,135		5,887	567		11,484
Provision (benefit) for income taxes	2,980		2,472	(749)		4,826
Net income (loss) before earnings of consolidated subsidiaries	7,155		3,415	1,316		6,658
Net income (loss)	7,155		3,415	1,316		6,658
Consolidation, Eliminations [Member]
Costs and expenses:
Net income (loss) of consolidated subsidiaries	(6,276)		(1,176)	(10,856)		2,580
Net income (loss)	(6,276)		(1,176)	(10,856)		2,580
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	128,768		123,112	382,611		346,504
Costs and expenses:
Costs of revenues	86,779		80,796	257,735		228,346
Selling, general and administrative expenses	21,904		22,970	68,607		66,521
Depreciation and amortization	8,519		9,149	27,001		25,037
Total costs and expenses	117,202		112,915	353,343		319,904
Income from operations	11,566		10,197	29,268		26,600
Interest and other expenses, net	6,579		6,346	40,001		18,154
Income (loss) before income taxes	4,987		3,851	(10,733)		8,446
Provision (benefit) for income taxes	970		1,024	(6,621)		498
Net income (loss) before earnings of consolidated subsidiaries	4,017		2,827	(4,112)		7,948
Net income (loss) of consolidated subsidiaries	3,138		588	5,428		(1,290)
Net income (loss)	7,155		3,415	1,316		6,658
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	77,265		80,966	228,476		227,047
Costs and expenses:
Costs of revenues	47,667		49,801	141,312		138,137
Selling, general and administrative expenses	18,551		20,564	56,721		60,131
Depreciation and amortization	4,478		6,556	14,573		19,868
Total costs and expenses	70,696		76,921	212,606		218,136
Income from operations	6,569		4,045	15,870		8,911
Interest and other expenses, net	1,421		2,009	4,570		5,873
Income (loss) before income taxes	5,148		2,036	11,300		3,038
Provision (benefit) for income taxes	2,010		1,448	5,872		4,328
Net income (loss) before earnings of consolidated subsidiaries	3,138		588	5,428		(1,290)
Net income (loss)	3,138		588	5,428		(1,290)
Parent Company [Member]
Costs and expenses:
Net income (loss) of consolidated subsidiaries	3,138		588	5,428		(1,290)
Net income (loss)	$ 3,138		$ 588	$ 5,428		$ (1,290)

[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.