CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Revenues	$ 663,285		$ 677,170		$ 688,765
Cost of services (exclusive of depreciation and amortization of $36,183, $36,094, and $36,248, respectively, included below)	547,387		533,880		510,724
Selling, general and administrative expenses	61,205		60,888		64,843
Depreciation and amortization	52,791		51,734		49,988
Impairment loss	0		0		183,288
Restructuring and related charges	0		1,773		9,036
Operating income (loss)	1,902		28,895		(129,114)
Interest expense	16,079		14,149		13,193
Income (loss) before income taxes	(14,177)		14,746		(142,307)
Income tax expense (benefit)	(5,636)		6,722		15,386
Net income (loss)	(8,541)		8,024		(157,693)
Earnings (loss) per share:
Basic (in dollars per share)	$ (0.25)		$ 0.24		$ (4.68)
Diluted (in dollars per share)	$ (0.25)	[1]	$ 0.24	[1]	$ (4.68)	[1]
Weighted average common shares and equivalents
Basic (in shares)	34,489		33,597		33,677
Diluted (in shares)	34,489	[1]	33,836	[1]	33,677	[1]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (8,019)		$ 8,884		$ (156,049)

[1] The assumed exercise of stock-based compensation awards for the years ended December 31, 2013 and December 31, 2011 was not considered because the impact would be anti-dilutive.