Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue	$ 436,689	$ 401,572	$ 333,167
Cost of revenue	360,424	329,601	276,533
Gross profit	76,265	71,971	56,634
Selling, general and administrative expenses	39,589	35,500	30,249
Gain on reversal of deferred rent liability	0	0	1,041
Gain (loss) on change in fair value of contingent consideration, net	1,676	(789)	517
Operating income	38,352	35,682	27,943
Interest expense	366	269	209
Other income (including interest income of $56 in 2013, $29 in 2012 and $57 in 2011)	502	389	657
Income before income taxes	38,488	35,802	28,391
Income tax expense	14,732	13,114	10,531
Net income	$ 23,756	$ 22,688	$ 17,860
Basic weighted average shares outstanding (in shares)	19,103	18,956	18,766
Diluted weighted average shares outstanding (in shares)	19,362	19,275	19,010
Per common share data:
Basic earnings per share (in dollars per share)	$ 1.24	$ 1.20	$ 0.95
Diluted earnings per share (in dollars per share)	$ 1.23	$ 1.18	$ 0.94