Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Income Statement [Abstract]
Services	$ 144,614	$ 207,763	$ 292,861	$ 434,527
Products	13,932	4,710	16,929	6,122
Revenue, Net	158,546	212,473	309,790	440,649
Services	137,611	198,863	279,037	416,870
Products	11,733	3,200	13,821	4,420
Contract costs	149,344	202,063	292,858	421,290
Selling, general and administrative expenses	1,929	457	2,750	755
Operating income	7,273	9,953	14,182	18,604
Interest expense (income), net	440	19	584	14
Income before income taxes	6,833	9,934	13,598	18,590
Provision for income taxes	2,622	3,831	5,215	7,089
Net income	$ 4,211	$ 6,103	$ 8,383	$ 11,501
Basic and diluted weighted average shares outstanding	5,237,337	5,191,909	5,225,899	5,186,191
Basic and diluted earnings per share	$ 0.80	$ 1.18	$ 1.60	$ 2.22
Dividends declared per share	$ 0.07	$ 0.06	$ 0.13	$ 0.11