Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Details) - Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Condensed Income Statements, Captions [Line Items]
Revenues	$ 775,615		$ 616,016		$ 521,237
Costs and expenses:
Costs of revenues	497,038		405,329		344,051
Selling, general and administrative expenses	171,197		133,870		113,510
Depreciation and amortization	60,280	[1],[2]	62,748	[1],[2]	58,551	[1],[2]
Total costs and expenses	728,515		601,947		516,112
Income from operations	47,100		14,069		5,125
Interest and other expenses, net	32,171		29,641		28,051
Income (loss) before income taxes	14,929		(15,572)		(22,926)
Provision (benefit) for income taxes	4,435		(5,356)		(7,987)
Net income (loss) before earnings of consolidated subsidiaries	10,494		(10,216)		(14,939)
Net income (loss)	10,494		(10,216)		(14,939)
Consolidation, Eliminations [Member]
Costs and expenses:
Net income (loss) of consolidated subsidiaries	(620)		13,998		10,346
Net income (loss)	(620)		13,998		10,346
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	468,419		374,817		340,200
Costs and expenses:
Costs of revenues	308,962		264,999		241,281
Selling, general and administrative expenses	92,213		70,681		60,255
Depreciation and amortization	34,302		31,787		34,339
Total costs and expenses	435,477		367,467		335,875
Income from operations	32,942		7,350		4,325
Interest and other expenses, net	24,909		22,107		24,411
Income (loss) before income taxes	8,033		(14,757)		(20,086)
Provision (benefit) for income taxes	(2,151)		(11,540)		(10,320)
Net income (loss) before earnings of consolidated subsidiaries	10,184		(3,217)		(9,766)
Net income (loss) of consolidated subsidiaries	310		(6,999)		(5,173)
Net income (loss)	10,494		(10,216)		(14,939)
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	307,196		241,199		181,037
Costs and expenses:
Costs of revenues	188,076		140,330		102,770
Selling, general and administrative expenses	78,984		63,189		53,255
Depreciation and amortization	25,978		30,961		24,212
Total costs and expenses	293,038		234,480		180,237
Income from operations	14,158		6,719		800
Interest and other expenses, net	7,262		7,534		3,640
Income (loss) before income taxes	6,896		(815)		(2,840)
Provision (benefit) for income taxes	6,586		6,184		2,333
Net income (loss) before earnings of consolidated subsidiaries	310		(6,999)		(5,173)
Net income (loss)	310		(6,999)		(5,173)
Parent Company [Member]
Costs and expenses:
Net income (loss) of consolidated subsidiaries	310		(6,999)		(5,173)
Net income (loss)	$ 310		$ (6,999)		$ (5,173)

[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.