Details of Certain Balance Sheet Accounts (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Receivables, net [Abstract]
Trade accounts	$ 14,150	$ 86,177
Vendor incentives	33,779	31,451
Other, net	1,756	1,708
Total receivables	49,685	119,336
Less allowance for doubtful accounts	(4,547)	(5,477)
Receivables, net	45,138	113,859
Prepaid expenses and other current assets [Abstract]
Prepaid expenses	9,670	8,647
Other current assets	132	2,633
Prepaid expenses and other current assets	9,802	11,280
Property and equipment, net [Abstract]
Land	1,641	1,641
Buildings	2,196	2,188
Leasehold improvements	28,048	26,254
Autos and trucks	19,994	14,221
Machinery and equipment	30,181	26,871
Computer equipment	34,779	32,875
Furniture and fixtures	8,827	8,388
Fixed assets in progress	4,336	2,384
Total property and equipment	130,002	114,822
Less accumulated depreciation	(77,674)	(68,256)
Property and equipment, net	52,328	46,566
Accrued expenses and other current liabilities [Abstract]
Salaries	2,996	7,625
Bonuses	26,728	22,549
Other	19,577	18,012
Accrued expenses and other current liabilities	$ 49,301	$ 48,186