CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 24,300	$ 34,013
Accounts receivable, net of allowances of $1,142 and $1,078, respectively	154,171	126,911
Costs and estimated earnings in excess of billings on uncompleted contracts	54,166	43,694
Construction materials inventory		4,003
Deferred income tax assets	13,253	13,253
Receivable for insurance claims in excess of deductibles	9,881	10,122
Refundable income taxes		884
Other current assets	2,679	3,071
Total current assets	258,450	235,951
Property and equipment, net of accumulated depreciation of $75,742 and $64,345, respectively	127,070	117,178
Goodwill	46,599	46,599
Intangible assets, net of accumulated amortization of $2,390 and $2,223, respectively	10,702	10,869
Other assets	1,948	1,971
Total assets	444,769	412,568
Current liabilities:
Short-term borrowings	10,000	10,000
Accounts payable	86,899	73,924
Billings in excess of costs and estimated earnings on uncompleted contracts	28,863	24,945
Accrued self insurance	38,338	38,850
Accrued income taxes	15
Other current liabilities	27,080	29,078
Total current liabilities	191,195	176,797
Deferred income tax liabilities	19,354	19,354
Other liabilities	1,230	679
Total liabilities	211,779	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 June 30, 2012 and December 31, 2011
Common stock-$0.01 par value per share; 100,000,000 authorized shares; 20,532,426 and 20,405,044 shares issued and outstanding at June 30, 2012 and December 31, 2011, respectively	203	203
Additional paid-in capital	151,384	149,877
Retained earnings	81,403	65,658
Total stockholders' equity	232,990	215,738
Total liabilities and stockholders' equity	$ 444,769	$ 412,568