CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) [Abstract]
Revenues	$ 180,613		$ 162,270		$ 357,391		$ 327,435
Cost of services (exclusive of depreciation and amortization of $9,604, $8,886, $18,976, and $17,712, respectively, included below)	146,476		133,468		294,624		274,726
Selling, general and administrative expenses	16,899		14,279		33,331		27,377
Depreciation and amortization	13,536		13,015		26,872		26,548
Legal settlement charges	0		0		9,363		0
Operating income (loss)	3,702		1,508		(6,799)		(1,216)
Interest expense	4,516		3,158		8,899		6,479
Loss before income taxes	(814)		(1,650)		(15,698)		(7,695)
Income tax benefit	(297)		(549)		(5,585)		(2,644)
Net loss	(517)		(1,101)		(10,113)		(5,051)
Loss per share:
Basic (in dollars per share)	$ (0.01)		$ (0.03)		$ (0.29)		$ (0.15)
Diluted (in dollars per share)	$ (0.01)	[1]	$ (0.03)	[1]	$ (0.29)	[1]	$ (0.15)	[1]
Comprehensive loss	$ (449)		$ (1,136)		$ (9,702)		$ (4,888)
Weighted average common shares and equivalents:
Basic (in shares)	35,285		34,188		35,219		34,089
Diluted (in shares)	35,285	[1]	34,188	[1]	35,219	[1]	34,089	[1]

[1] The assumed exercise of stock-based compensation awards for the three and six months ended June 30, 2014 and 2013 was not considered because the impact would be anti-dilutive.