CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Revenue	$ 322,597	$ 272,065	$ 268,661
Cost of revenue	265,967	228,175	223,694
Gross profit	56,630	43,890	44,967
Selling, general and administrative expenses	26,469	21,534	23,754
Amortization of intangible assets	3,792	1,541	3,305
Operating income	26,369	20,815	17,908
Interest expense, net	(6,928)	(1,084)	(2,024)
Other income, net	122	453	691
Income from continuing operations before provision for income taxes	19,563	20,184	16,575
Provision for income taxes	8,106	7,871	6,262
Income from continuing operations	11,457	12,313	10,313
Gain (loss) from discontinued operations (Note 3)	0	392	(141)
Net income	$ 11,457	$ 12,705	$ 10,172
Basic
Income from continuing operations (in dollars per share)	$ 1.13	$ 1.24	$ 1.08
Gain (loss) from discontinued operations (in dollars per share)	$ 0	$ 0.04	$ (0.02)
Net income (in dollars per share)	$ 1.13	$ 1.28	$ 1.06
Diluted
Income from continuing operations (in dollars per share)	$ 1.12	$ 1.22	$ 1.06
Gain (loss) from discontinued operations (in dollars per share)	$ 0	$ 0.04	$ (0.02)
Net income (in dollars per share)	$ 1.12	$ 1.26	$ 1.04
Weighted average shares outstanding
Basic (in shares)	10,108,907	9,893,322	9,551,614
Diluted (in shares)	10,219,408	10,078,937	9,772,722