CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 7,341	$ 8,917
Accounts receivable, net of allowances	370,594	313,304
Inventories, net	315,823	272,276
Costs in excess of billings on uncompleted contracts	25,963	26,373
Income taxes receivable	0	2,437
Prepaid expenses and other current assets	53,821	43,635
Total current assets	773,542	666,942
Property and equipment, net of accumulated depreciation	302,050	286,741
Deferred income taxes	0	550
Customer relationship intangible assets, net of accumulated amortization	173,138	164,191
Other intangible assets, net of accumulated amortization	2,356	3,024
Goodwill	262,077	254,832
Other long-term assets	18,669	18,734
Total assets	1,531,832	1,395,014
Current liabilities
Accounts payable	202,743	165,540
Accrued expenses and other liabilities	91,937	88,786
Billings in excess of costs on uncompleted contracts	19,831	15,691
Income taxes payable	2,697	0
Interest payable	4,944	5,619
Current portion: Long-term debt and capital lease obligations	8,704	11,155
Current portion: Insurance reserves	14,494	16,021
Total current liabilities	345,350	302,812
Insurance reserves	38,315	39,184
Long-term debt	410,952	344,827
Long-term portion of capital lease obligations	18,531	20,581
Deferred income taxes	3,605	0
Other long-term liabilities	7,511	7,009
Total liabilities	824,264	714,413
Commitments and contingencies (Note 8)
Stockholders' equity
Preferred stock, $0.01 par value, 50.0 million shares authorized, no shares issued and outstanding at June 30, 2017 and December 31, 2016	0	0
Common stock, $0.01 par value, 300.0 million shares authorized, 67.1 million and 66.8 million shares issued, and 66.9 million and 66.7 million outstanding at June 30, 2017 and December 31, 2016, respectively	671	668
Additional paid-in capital	655,217	649,280
Retained earnings	54,522	33,182
Treasury stock, at cost, 0.2 million and 0.1 million shares at June 30, 2017 and December 31, 2016, respectively	(2,842)	(2,529)
Total stockholders' equity	707,568	680,601
Total liabilities and stockholders' equity	$ 1,531,832	$ 1,395,014