Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 34,734	$ 38,893
Accounts receivable:
Trade, net of allowance of $0	27,387	36,905
Retainage	15,011	15,883
Other	1,619	1,998
Income taxes receivable	101	333
Inventory	6,723	6,487
Deferred tax asset	1,733	1,755
Costs and estimated earnings in excess of billings on uncompleted contracts	47,104	44,581
Asset held for sale	375	375
Prepaid expenses and other	3,739	3,924
Total current assets	138,526	151,134
Property and equipment, net	162,057	161,773
Inventory, non-current	5,508	5,508
Goodwill	33,798	33,798
Intangible assets, net of amortization	59	87
Total assets	339,948	352,300
Current liabilities:
Current debt	29,642	33,527
Accounts payable:
Trade	23,233	21,889
Retainage	1,788	1,706
Accrued liabilities	13,474	15,803
Taxes payable	512	997
Billings in excess of costs and estimated earnings on uncompleted contracts	9,152	16,704
Total current liabilities	77,801	90,626
Long-term debt	3,348	3,480
Other long-term liabilities	512	566
Deferred income taxes	20,997	20,877
Deferred revenue	15	34
Total liabilities	102,673	115,583
Commitments and contingencies
Stockholders’ equity:
Preferred stock -- $0.01 par value, 10,000,000 authorized, none issued	0	0
Common stock -- $0.01 par value, 50,000,000 authorized, 27,953,929 and 27,969,783 issued; 27,592,699 and 27,525,365 outstanding at March 31,2015 and December 31, 2014, respectively	279	279
Treasury stock, 361,231 shares, at cost	(3,439)	(3,439)
Additional paid-in capital	167,249	166,433
Retained earnings	73,186	73,444
Equity attributable to common stockholders	237,275	236,717
Total stockholders’ equity	237,275	236,717
Total liabilities and stockholders’ equity	$ 339,948	$ 352,300