SEGMENT INFORMATION (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 year segment day statement	Sep. 30, 2010
SEGMENT INFORMATION
Number of reportable segments			2
Segment information
Net sales	$ 474,709,000	$ 381,466,000	$ 1,293,273,000	$ 985,277,000
Contribution margin	155,580,000	128,653,000	417,174,000	333,199,000
Corporate and unallocated expense	(23,490,000)	(21,098,000)	(64,148,000)	(65,182,000)
Operating income	132,090,000	107,555,000	353,026,000	268,017,000
Other income (expense)	(862,000)	(186,000)	(286,000)	1,119,000
Income before provision for income taxes	131,228,000	107,369,000	352,740,000	269,136,000
Depreciation and amortization	4,484,000	3,001,000	12,152,000	8,450,000
Intangible amortization	16,000	12,000	39,000	36,000
Stock-based compensation expense	4,900,000	4,300,000	12,800,000	12,800,000
Bad debt expense			49,000	1,344,000
Direct Store Delivery ("DSD")
Segment information
Net sales	447,113,000	356,737,000	1,218,491,000	915,182,000
Contribution margin	153,098,000	130,557,000	413,629,000	333,006,000
Other income (expense)	(73,000)	(5,000)	(81,000)	49,000
Depreciation and amortization	3,358,000	1,709,000	8,975,000	4,738,000
Warehouse ("Warehouse")
Segment information
Net sales	27,596,000	24,729,000	74,782,000	70,095,000
Contribution margin	2,482,000	(1,904,000)	3,545,000	193,000
Depreciation and amortization	25,000	16,000	61,000	39,000
Intangible amortization	11,000	11,000	33,000	31,000
Corporate and Unallocated
Segment information
Corporate and unallocated expense	(23,490,000)	(21,098,000)	(64,148,000)	(65,182,000)
Other income (expense)	(789,000)	(181,000)	(205,000)	1,070,000
Depreciation and amortization	1,101,000	1,276,000	3,116,000	3,673,000
Intangible amortization	5,000	1,000	6,000	5,000
Payroll cost	14,100,000	12,800,000	39,100,000	37,500,000
Stock-based compensation expense	4,900,000	4,300,000	12,800,000	12,800,000
Professional service expenses	4,500,000	5,000,000	13,100,000	15,300,000
Other operating expenses	4,900,000	2,000,000	11,900,000	7,100,000
Bad debt expense				$ 1,600,000