Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Details) - Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Income Statements, Captions [Line Items]
Revenues	$ 156,148,000	$ 127,777,000	$ 304,851,000	$ 251,515,000
Costs and expenses:
Costs of revenues	102,118,000	84,223,000	199,502,000	165,396,000
Selling, general and administrative expenses	34,076,000	27,729,000	67,333,000	56,361,000
Depreciation and amortization	15,822,000	13,762,000	32,148,000	27,787,000
Total costs and expenses	152,016,000	125,714,000	298,983,000	249,544,000
Income from operations	4,132,000	2,063,000	5,868,000	1,971,000
Interest and other expenses, net	7,700,000	6,174,000	15,230,000	12,747,000
Loss before income taxes	(3,568,000)	(4,111,000)	(9,362,000)	(10,776,000)
Benefit for income taxes	(785,000)	(804,000)	(2,987,000)	(3,146,000)
Net loss	(2,783,000)	(3,307,000)	(6,375,000)	(7,630,000)
Comprehensive Loss:
Foreign currency translation adjustments, net of tax	(5,731,000)	(1,736,000)	(9,982,000)	714,000
Total comprehensive loss	(8,514,000)	(5,043,000)	(16,357,000)	(6,916,000)
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	95,493,000	88,462,000	186,671,000	175,657,000
Costs and expenses:
Costs of revenues	67,073,000	62,307,000	131,204,000	122,722,000
Selling, general and administrative expenses	17,280,000	15,424,000	35,404,000	32,446,000
Depreciation and amortization	8,256,000	8,682,000	16,879,000	17,401,000
Total costs and expenses	92,609,000	86,413,000	183,487,000	172,569,000
Income from operations	2,884,000	2,049,000	3,184,000	3,088,000
Interest and other expenses, net	5,788,000	5,142,000	11,347,000	10,454,000
Loss before income taxes	(2,904,000)	(3,093,000)	(8,163,000)	(7,366,000)
Benefit for income taxes	(1,820,000)	(761,000)	(4,878,000)	(3,246,000)
Net loss	(1,084,000)	(2,332,000)	(3,285,000)	(4,120,000)
Comprehensive Loss:
Foreign currency translation adjustments, net of tax	2,757,000		2,682,000
Total comprehensive loss	1,673,000	(2,332,000)	(603,000)	(4,120,000)
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	60,655,000	39,315,000	118,180,000	75,858,000
Costs and expenses:
Costs of revenues	35,045,000	21,916,000	68,298,000	42,674,000
Selling, general and administrative expenses	16,796,000	12,305,000	31,929,000	23,915,000
Depreciation and amortization	7,566,000	5,080,000	15,269,000	10,386,000
Total costs and expenses	59,407,000	39,301,000	115,496,000	76,975,000
Income from operations	1,248,000	14,000	2,684,000	(1,117,000)
Interest and other expenses, net	1,912,000	1,032,000	3,883,000	2,293,000
Loss before income taxes	(664,000)	(1,018,000)	(1,199,000)	(3,410,000)
Benefit for income taxes	1,035,000	(43,000)	1,891,000	100,000
Net loss	(1,699,000)	(975,000)	(3,090,000)	(3,510,000)
Comprehensive Loss:
Foreign currency translation adjustments, net of tax	(8,488,000)	(1,736,000)	(12,664,000)	714,000
Total comprehensive loss	$ (10,187,000)	$ (2,711,000)	$ (15,754,000)	$ (2,796,000)