CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 54,552	$ 76,454
Accounts receivable, net of allowances of $1,168 and $1,132, respectively	177,022	173,468
Costs and estimated earnings in excess of billings on uncompleted contracts	56,236	40,519
Deferred income tax assets	14,591	14,550
Receivable for insurance claims in excess of deductibles	12,739	11,389
Refundable income taxes	1,970	1,286
Other current assets	5,551	6,283
Total current assets	322,661	323,949
Property and equipment, net of accumulated depreciation of $131,506 and $115,679, respectively	152,644	142,931
Goodwill	46,599	46,599
Intangible assets, net of accumulated amortization of $3,060 and $2,893, respectively	10,032	10,199
Other assets	1,524	1,744
Total assets	533,460	525,422
Current liabilities:
Accounts payable	73,307	79,605
Billings in excess of costs and estimated earnings on uncompleted contracts	53,400	52,952
Accrued self insurance	40,269	39,111
Other current liabilities	30,360	32,711
Total current liabilities	197,336	204,379
Deferred income tax liabilities	23,719	23,719
Other liabilities	1,291	1,233
Total liabilities	222,346	229,331
Commitments and contingencies
Stockholders' equity:
Preferred stock-$0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at June 30, 2014 and December 31, 2013
Common stock-$0.01 par value per share; 100,000,000 authorized shares; 21,322,196 and 21,223,076 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	211	210
Additional paid-in capital	162,211	161,202
Retained earnings	148,692	134,679
Total stockholders' equity	311,114	296,091
Total liabilities and stockholders' equity	$ 533,460	$ 525,422