Details of Certain Balance Sheet Accounts (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Receivables, net [Abstract]
Trade accounts	$ 16,451	$ 26,681
Vendor programs	57,304	50,302
Other, net	1,920	3,511
Total receivables	75,675	80,494
Less allowance for doubtful accounts	(6,182)	(3,897)
Receivables, net	69,493	76,597
Prepaid expenses and other current assets [Abstract]
Prepaid expenses	15,114	14,700
Other current assets	3,392	4,869
Prepaid expenses and other current assets	18,506	19,569
Property and equipment, net [Abstract]
Land	3,193	3,003
Buildings	5,318	4,255
Leasehold improvements	45,098	41,908
Autos and trucks	82,216	70,570
Machinery and equipment	61,945	55,128
Computer equipment	39,307	38,194
Furniture and fixtures	9,778	9,670
Fixed assets in progress	1,751	1,072
Total property and equipment	248,606	223,800
Less accumulated depreciation	(141,642)	(122,861)
Property and equipment, net	106,964	100,939
Accrued expenses and other current liabilities [Abstract]
Salaries and payroll deductions	12,475	9,987
Performance-based compensation	25,261	31,807
Taxes payable	8,337	7,970
Other current liabilities	12,534	15,718
Accrued expenses and other current liabilities	$ 58,607	$ 65,482