CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) [Abstract]
Revenues	$ 185,656	$ 166,615	$ 543,047		$ 494,049
Cost of services (exclusive of depreciation and amortization of $9,392, $9,115, $28,368, and $26,826, respectively, included below)	148,950	131,109	443,574		405,835
Selling, general and administrative expenses	15,756	16,440	49,086		43,816
Depreciation and amortization	13,378	12,952	40,250		39,499
Legal settlement charges	0	0	9,363		0
Operating income	7,572	6,114	774		4,899
Interest expense	4,574	5,006	13,472		11,486
Income (loss) before income taxes	2,998	1,108	(12,698)		(6,587)
Income tax expense (benefit)	1,025	(691)	(4,559)		(3,336)
Net income (loss)	1,973	1,799	(8,139)		(3,251)
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.06	$ 0.05	$ (0.23)		$ (0.09)
Diluted (in dollars per share)	$ 0.05	$ 0.05	$ (0.23)	[1]	$ (0.09)	[1]
Comprehensive income (loss)	$ 849	$ 2,444	$ (8,853)		$ (2,444)
Weighted average common shares and equivalents:
Basic (in shares)	35,351	34,682	35,263		34,288
Diluted (in shares)	36,477	35,834	35,263	[1]	34,288	[1]

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