CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
CONSOLIDATED STATEMENTS OF OPERATIONS
Contract revenues	$ 213,916	$ 260,410	$ 415,258	$ 500,638
Contract costs	182,663	230,348	356,702	444,473
Gross profit	31,253	30,062	58,556	56,165
Selling, general and administrative expenses	16,144	14,515	32,151	30,433
Amortization of intangible assets	83	83	167	167
Gain on sale of property and equipment	(336)	(193)	(514)	(320)
Income from operations	15,362	15,657	26,752	25,885
Other income (expense)
Interest income		1	3	1
Interest expense	(179)	(204)	(362)	(386)
Other, net	(22)	(32)	(17)	(59)
Income before provision for income taxes	15,161	15,422	26,376	25,441
Income tax expense	5,699	5,887	9,954	9,696
Net income	$ 9,462	$ 9,535	$ 16,422	$ 15,745
Income per common share:
-Basic (in dollars per share)	$ 0.45	$ 0.46	$ 0.79	$ 0.77
-Diluted (in dollars per share)	$ 0.44	$ 0.45	$ 0.76	$ 0.74
Weighted average number of common shares and potential common shares outstanding:
-Basic (in shares)	20,785	20,338	20,723	20,319
-Diluted (in shares)	21,397	21,094	21,383	21,098