BUSINESS SEGMENTS (Details) (USD $) In Thousands, unless otherwise specified	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	Dec. 31, 2011	Dec. 31, 2010
Segment reporting information
Revenue, net	$ 342,034	$ 255,352	$ 239,536	$ 262,367	$ 314,077	$ 239,738	$ 234,992	$ 265,470	$ 1,099,289	$ 1,054,277	$ 1,089,873
Cost of goods sold	280,823	208,810	196,367	214,859	263,216	201,365	195,222	215,386	900,859	875,189	900,233
Gross profit	61,211	46,542	43,169	47,508	50,861	38,373	39,770	50,084	198,430	179,088	189,640
Operating expenses	(53,319)	(44,767)	(43,150)	(45,033)	(53,049)	(46,314)	(47,188)	(50,071)	(186,269)	(196,622)	(174,675)
Other income (expense), net									2,993	(2,046)	(717)
Provision (benefit) for income taxes	303	131	42	9	60	(240)	16	22	485	(142)	359
Net income (loss)	8,787	2,693	470	2,719	(3,409)	(7,787)	(7,798)	(444)	14,669	(19,438)	13,889
Direct
Segment reporting information
Revenue, net									155,516	163,609	209,646
Cost of goods sold									140,536	149,660	187,124
Gross profit									14,980	13,949	22,522
Fulfillment partner
Segment reporting information
Revenue, net									943,773	890,668	880,227
Cost of goods sold									760,323	725,529	713,109
Gross profit									$ 183,450	$ 165,139	$ 167,118