SEGMENT INFORMATION (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 item	Mar. 31, 2012
SEGMENT INFORMATION
Number of reportable segments	2
Segment information
Net sales	$ 484,223,000	$ 454,605,000
Contribution margin	139,356,000	151,249,000
Corporate and unallocated expense	(32,050,000)	(24,964,000)
Operating income	107,306,000	126,285,000
Other income (expense)	(1,902,000)	346,000
Income before provision for income taxes	105,404,000	126,631,000
Depreciation and amortization	(5,048,000)	(4,956,000)
Trademark amortization	(12,000)	(12,000)
Stock-based compensation expense	7,000,000	6,600,000
Direct Store Delivery ("DSD")
Segment information
Net sales	460,175,000	431,182,000
Contribution margin	138,974,000	149,092,000
Other income (expense)	188,000	100,000
Depreciation and amortization	(4,421,000)	(3,783,000)
Warehouse ("Warehouse")
Segment information
Net sales	24,048,000	23,423,000
Contribution margin	382,000	2,157,000
Depreciation and amortization	(47,000)	(29,000)
Trademark amortization	(11,000)	(11,000)
Corporate and Unallocated
Segment information
Corporate and unallocated expense	(32,050,000)	(24,964,000)
Other income (expense)	(2,090,000)	246,000
Depreciation and amortization	(580,000)	(1,144,000)
Trademark amortization	(1,000)	(1,000)
Payroll cost	19,400,000	17,700,000
Stock-based compensation expense	7,000,000	6,600,000
Professional service expenses	7,600,000	4,700,000
Other operating expenses	$ 5,000,000	$ 2,600,000