CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 3,750	$ 34,013
Accounts receivable, net of allowances of $1,160 and $1,078, respectively	155,329	126,911
Costs and estimated earnings in excess of billings on uncompleted contracts	53,873	43,694
Construction materials inventory	1,542	4,003
Deferred income tax assets	13,253	13,253
Receivable for insurance claims in excess of deductibles	9,942	10,122
Refundable income taxes		884
Other current assets	3,335	3,071
Total current assets	241,024	235,951
Property and equipment, net of accumulated depreciation of $69,957 and $64,345, respectively	120,547	117,178
Goodwill	46,599	46,599
Intangible assets, net of accumulated amortization of $2,307 and $2,223, respectively	10,785	10,869
Other assets	1,978	1,971
Total assets	420,933	412,568
Current liabilities:
Short-term borrowings		10,000
Accounts payable	80,853	73,924
Billings in excess of costs and estimated earnings on uncompleted contracts	28,750	24,945
Accrued self insurance	38,203	38,850
Accrued income taxes	2,064
Other current liabilities	28,013	29,078
Total current liabilities	177,883	176,797
Deferred income tax liabilities	19,354	19,354
Other liabilities	1,144	679
Total liabilities	198,381	196,830
Commitments and contingencies
Stockholders' equity:
Preferred stock-$0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at March 31, 2012 and December 31, 2011
Common stock-$0.01 par value per share; 100,000,000 authorized shares; 20,500,394 and 20,405,044 shares issued and outstanding at March 31, 2012 and December 31, 2011, respectively	203	203
Additional paid-in capital	150,481	149,877
Retained earnings	71,868	65,658
Total stockholders' equity	222,552	215,738
Total liabilities and stockholders' equity	$ 420,933	$ 412,568