CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenue	$ 307,832	$ 248,286	$ 311,529
Cost of revenue:
Contract costs	295,614	225,015	272,064
Asset impairments	7,690
Total cost of revenue	303,304	225,015	272,064
Gross profit	4,528	23,271	39,465
General and administrative expenses	8,187	7,947	8,257
Operating income (loss)	(3,659)	15,324	31,208
Other income (expense):
Interest expense	(173)	(76)	(77)
Interest income	1,075	5,097	1,063
Other, net	309	1,014	(55)
Nonoperating Income (Expense), Total	1,211	6,035	931
Income (loss) before income taxes	(2,448)	21,359	32,139
Income taxes	(644)	8,266	11,335
Net income (loss)	$ (1,804)	$ 13,093	$ 20,804
Per share data:
Basic earnings (loss) per share-common shareholders	$ (0.13)	$ 0.90	$ 1.44
Diluted earnings (loss) per share-common shareholders	$ (0.13)	$ 0.90	$ 1.44
Cash dividend declared per common share	$ 0.24	$ 0.04	$ 0.13