SEGMENT INFORMATION (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012 item	Dec. 31, 2011	Dec. 31, 2010
SEGMENT INFORMATION
Number of reportable segments									2
Segment information
Net sales	$ 471,517,000	$ 541,940,000	$ 592,640,000	$ 454,605,000	$ 409,957,000	$ 474,709,000	$ 462,145,000	$ 356,419,000	$ 2,060,702,000	$ 1,703,230,000	$ 1,303,942,000
Contribution margin									664,103,000	547,501,000	435,965,000
Corporate & unallocated expense									(113,480,000)	(91,078,000)	(88,151,000)
Operating income									550,623,000	456,423,000	347,814,000
Interest and other income, net									(1,469,000)	847,000	1,488,000
Income before provision for income taxes									549,154,000	457,270,000	349,302,000
Depreciation & amortization									(20,513,000)	(17,032,000)	(11,728,000)
Trademark amortization									(49,000)	(52,000)	(48,000)
Stock-based compensation expense									28,400,000	19,400,000	16,900,000
Bad debt expense									(10,000)	52,000	1,659,000
Direct Store Delivery ("DSD")
Segment information
Net sales									1,966,481,000	1,608,326,000	1,212,645,000
Contribution margin									660,607,000	543,210,000	436,742,000
Interest and other income, net									494,000	(12,000)	(51,000)
Depreciation & amortization									(15,660,000)	(12,684,000)	(6,933,000)
Warehouse ("Warehouse")
Segment information
Net sales									94,221,000	94,904,000	91,297,000
Contribution margin									3,496,000	4,291,000	(777,000)
Interest and other income, net									(2,000)	(1,000)
Depreciation & amortization									(139,000)	(87,000)	(55,000)
Trademark amortization									(44,000)	(44,000)	(42,000)
Corporate and Unallocated
Segment information
Corporate & unallocated expense									(113,480,000)	(91,078,000)	(88,151,000)
Interest and other income, net									(1,961,000)	860,000	1,539,000
Depreciation & amortization									(4,714,000)	(4,261,000)	(4,740,000)
Trademark amortization									(5,000)	(8,000)	(6,000)
Payroll cost									73,000,000	55,800,000	51,200,000
Stock-based compensation expense									28,400,000	19,400,000	16,900,000
Professional service expenses									19,700,000	17,800,000	20,700,000
Depreciation expenses									4,400,000	4,100,000	4,700,000
Bad debt expense											1,700,000
Other operating expenses									$ 16,400,000	$ 13,400,000	$ 10,000,000