CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Contract revenues	$ 373,502	$ 283,259	$ 1,029,816	$ 798,827
Contract costs	338,649	249,196	941,706	706,048
Gross profit	34,853	34,063	88,110	92,779
Selling, general and administrative expenses	23,814	23,203	74,617	69,579
Amortization of intangible assets	195	188	593	691
Gain on sale of property and equipment	(576)	(467)	(2,602)	(1,079)
Income from operations	11,420	11,139	15,502	23,588
Other income (expense)
Interest income	0	0	4	5
Interest expense	(685)	(408)	(1,793)	(833)
Other, net	(1,413)	(417)	212	(361)
Income before provision for income taxes	9,322	10,314	13,925	22,399
Income tax expense	4,177	4,168	6,350	8,766
Net income	$ 5,145	$ 6,146	$ 7,575	$ 13,633
Income per common share:
—Basic (in dollars per share)	$ 0.32	$ 0.39	$ 0.47	$ 0.78
—Diluted (in dollars per share)	$ 0.31	$ 0.38	$ 0.46	$ 0.77
Weighted average number of common shares and potential common shares outstanding:
—Basic (in shares)	16,314	15,805	16,263	17,489
—Diluted (in shares)	16,474	16,177	16,476	17,817
Net income	$ 5,145	$ 6,146	$ 7,575	$ 13,633
Other comprehensive income (loss):
Foreign currency translation adjustment	206	19	216	(65)
Other comprehensive income (loss)	206	19	216	(65)
Total comprehensive income	$ 5,351	$ 6,165	$ 7,791	$ 13,568