CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 24,888	$ 55,287
Contract receivables, net	60,535	72,474
Contract retainage	1,298	4,313
Costs and estimated earnings in excess of billings on uncompleted contracts	26,317	12,982
Prepaid subcontractor costs	33,145	9,731
Prepaid expenses and other	4,457	3,344
Inventory	5,024	6,278
Deferred tax assets	13,039	10,157
Income tax receivable	4,901	3,347
Total current assets	173,604	177,913
Property, plant and equipment, net	229,216	216,722
Long-term contracts receivable, net		625
Other receivables
Other assets	675	675
Total assets	403,495	395,935
Current liabilities:
Accounts payable	49,485	20,502
Billings in excess of costs and estimated earnings on uncompleted contracts	28,498	49,363
Accrued employee costs	5,340	3,512
Accrued expenses	5,161	2,610
Accrued contract losses	3,790
Total current liabilities	92,274	75,987
Deferred tax liabilities	37,721	37,149
Total liabilities	129,995	113,136
Shareholders' equity:
Preferred stock, no par value, 5,000,000 shares authorized, no shares issued and outstanding
Common stock, no par value, 20,000,000 shares authorized, 14,452,660 and 14,376,443 shares issued and outstanding at December 31, 2012 and December 31, 2011	9,956	9,921
Additional paid-in capital	92,512	91,933
Retained earnings	171,032	180,945
Total shareholders' equity	273,500	282,799
Total liabilities and shareholders' equity	$ 403,495	$ 395,935