CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 6,939	$ 23,846
Accounts receivable, net of allowances of $442 and $432, respectively	222,549	234,642
Costs and estimated earnings in excess of billings on uncompleted contracts	72,903	69,950
Receivable for insurance claims in excess of deductibles	18,524	18,477
Refundable income taxes	2,518	2,474
Other current assets	7,275	8,202
Total current assets	330,708	357,591
Property and equipment, net of accumulated depreciation of $215,968 and $209,466, respectively	156,458	154,891
Goodwill	46,781	46,781
Intangible assets, net of accumulated amortization of $4,872 and $4,684, respectively	11,385	11,566
Other assets	3,376	2,666
Total assets	548,708	573,495
Current liabilities:
Current portion of capital lease obligations	1,093	1,085
Accounts payable	91,048	99,942
Billings in excess of costs and estimated earnings on uncompleted contracts	49,448	42,321
Accrued self insurance	44,419	42,584
Other current liabilities	36,722	42,382
Total current liabilities	222,730	228,314
Deferred income tax liabilities	18,423	18,565
Long-term debt	39,580	59,070
Capital lease obligations, net of current maturities	3,556	3,833
Other liabilities	525	539
Total liabilities	284,814	310,321
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, 2017 and December 31, 2016	0	0
Common stock—$0.01 par value per share; 100,000,000 authorized shares;16,73,065 and 16,333,139 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively	163	162
Additional paid-in capital	140,386	140,100
Accumulated other comprehensive loss	(482)	(433)
Retained earnings	123,827	123,345
Total stockholders’ equity	263,894	263,174
Total liabilities and stockholders’ equity	$ 548,708	$ 573,495