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	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Condensed Income Statements, Captions [Line Items]
Revenues	$ 196,316	$ 173,028
Costs and expenses:
Costs of revenues	128,176	111,035
Selling, general and administrative expenses	42,152	40,528
Depreciation and amortization	14,848	14,342
Total costs and expenses	185,176	165,905
Income from operations	11,140	7,123
Interest and other expenses, net	8,004	7,577
Income (loss) before income taxes	3,136	(454)
Provision (benefit) for income taxes	1,112	(165)
Net income (loss) before earnings of consolidated subsidiaries	2,024	(289)
Net income (loss)	2,024	(289)
Consolidation, Eliminations [Member]
Costs and expenses:
Net income (loss) of consolidated subsidiaries	(1,760)	3,592
Net income (loss)	(1,760)	3,592
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	121,718	106,049
Costs and expenses:
Costs of revenues	82,334	71,067
Selling, general and administrative expenses	23,014	21,705
Depreciation and amortization	9,411	7,720
Total costs and expenses	114,759	100,492
Income from operations	6,959	5,557
Interest and other expenses, net	6,409	5,692
Income (loss) before income taxes	550	(135)
Provision (benefit) for income taxes	(594)	(1,642)
Net income (loss) before earnings of consolidated subsidiaries	1,144	1,507
Net income (loss) of consolidated subsidiaries	880	(1,796)
Net income (loss)	2,024	(289)
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	74,598	66,979
Costs and expenses:
Costs of revenues	45,842	39,968
Selling, general and administrative expenses	19,138	18,823
Depreciation and amortization	5,437	6,622
Total costs and expenses	70,417	65,413
Income from operations	4,181	1,566
Interest and other expenses, net	1,595	1,885
Income (loss) before income taxes	2,586	(319)
Provision (benefit) for income taxes	1,706	1,477
Net income (loss) before earnings of consolidated subsidiaries	880	(1,796)
Net income (loss)	880	(1,796)
Parent Company [Member]
Costs and expenses:
Net income (loss) of consolidated subsidiaries	880	(1,796)
Net income (loss)	$ 880	$ (1,796)