Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Details) - Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Income Statements, Captions [Line Items]
Revenues	$ 819,567	$ 775,615	$ 616,016
Costs and expenses:
Costs of revenues	536,494	497,038	405,329
Selling, general and administrative expenses	166,650	171,197	133,870
Depreciation and amortization	55,691	60,280	62,748
Total costs and expenses	758,835	728,515	601,947
Income from operations	60,732	47,100	14,069
Interest and other expenses, net	52,537	32,171	29,641
Income (loss) before income taxes	8,195	14,929	(15,572)
Provision (benefit) for income taxes	2,604	4,435	(5,356)
Net income (loss) before earnings of consolidated subsidiaries	5,591	10,494	(10,216)
Net income (loss)	5,591	10,494	(10,216)
Consolidation, Eliminations [Member]
Costs and expenses:
Net income (loss) of consolidated subsidiaries	(29,432)	(620)	13,998
Net income (loss)	(29,432)	(620)	13,998
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	511,324	468,419	374,817
Costs and expenses:
Costs of revenues	346,733	308,962	264,999
Selling, general and administrative expenses	91,064	92,213	70,681
Depreciation and amortization	36,101	34,302	31,787
Total costs and expenses	473,898	435,477	367,467
Income from operations	37,426	32,942	7,350
Interest and other expenses, net	46,600	24,909	22,107
Income (loss) before income taxes	(9,174)	8,033	(14,757)
Provision (benefit) for income taxes	(49)	(2,151)	(11,540)
Net income (loss) before earnings of consolidated subsidiaries	(9,125)	10,184	(3,217)
Net income (loss) of consolidated subsidiaries	14,716	310	(6,999)
Net income (loss)	5,591	10,494	(10,216)
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	308,243	307,196	241,199
Costs and expenses:
Costs of revenues	189,761	188,076	140,330
Selling, general and administrative expenses	75,586	78,984	63,189
Depreciation and amortization	19,590	25,978	30,961
Total costs and expenses	284,937	293,038	234,480
Income from operations	23,306	14,158	6,719
Interest and other expenses, net	5,937	7,262	7,534
Income (loss) before income taxes	17,369	6,896	(815)
Provision (benefit) for income taxes	2,653	6,586	6,184
Net income (loss) before earnings of consolidated subsidiaries	14,716	310	(6,999)
Net income (loss)	14,716	310	(6,999)
Parent Company [Member]
Costs and expenses:
Net income (loss) of consolidated subsidiaries	14,716	310	(6,999)
Net income (loss)	$ 14,716	$ 310	$ (6,999)