CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 253,443	$ 165,496
Accounts Receivable, after Allowance for Credit Loss, Current	361,953	325,741
Inventories	326,807	331,969
Contract assets	33,871	32,125
Income taxes receivable	0	7,504
Prepaid expenses and other current assets	70,926	66,818
Total current assets	1,047,000	929,653
Property and equipment, net of accumulated depreciation	368,378	345,466
Operating lease right-of-use assets	136,540	139,907
Customer relationship intangible assets, net of accumulated amortization	175,150	185,049
Other intangible assets, net of accumulated amortization	450	580
Goodwill	295,402	297,146
Other long-term assets	7,443	8,300
Total assets	2,030,363	1,906,101
Current liabilities
Accounts payable	237,029	189,644
Accrued expenses and other liabilities	97,127	117,825
Contract liabilities	42,610	31,094
Income taxes payable	2,640	0
Interest payable	4,947	4,759
Current portion: Long-term debt and finance lease obligations	4,214	5,577
Current portion: Operating lease liabilities	27,411	26,147
Current portion: Insurance reserves	18,487	16,328
Total current liabilities	434,465	391,374
Insurance reserves	42,473	43,536
Long-term debt	346,450	346,032
Long-term portion of finance lease obligations	5,131	6,959
Long-term portion of operating lease liabilities	118,705	120,832
Deferred income taxes	25,601	15,195
Other long-term liabilities	7,474	661
Total liabilities	980,299	924,589
Commitments and contingencies (Note 8)
Stockholders’ equity
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	688	683
Additional paid-in capital	694,113	687,255
Retained earnings	385,841	320,190
Treasury Stock, Value	(30,578)	(26,616)
Total stockholders’ equity	1,050,064	981,512
Total liabilities and stockholders’ equity	$ 2,030,363	$ 1,906,101