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
Net revenues	$ 184,433	$ 136,335	$ 72,146
Cost of revenues	154,220	111,596	57,414
Gross profit	30,213	24,739	14,732
Selling and administrative expenses:
Selling	3,935	3,822	2,914
Administrative	11,106	9,069	8,148
Total selling and administrative expenses	15,041	12,891	11,062
Gain on transfer of assets		172
Gain (loss) on sale or disposal of assets	11	(22)	(17)
Income from operations	15,183	11,998	3,653
Equity in income (loss) of joint venture	(189)	582	(890)
Other income (expense), net	71	(188)	(13)
Earnings before income taxes	15,065	12,392	2,750
Income tax expense	(4,718)	(3,958)	(679)
Net earnings	$ 10,347	$ 8,434	$ 2,071
Basic earnings per share (in dollars per share)	$ 0.72	$ 0.60	$ 0.15
Diluted earnings per share (in dollars per share)	$ 0.71	$ 0.59	$ 0.15
Weighted average shares outstanding:
Basic (in shares)	14,427	14,163	14,003
Diluted (in shares)	14,485	14,371	14,161