BUSINESS SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment reporting information
Revenue, net	$ 391,211	$ 352,991	$ 1,177,568	$ 1,026,743
Cost of goods sold	318,760	285,933	956,023	833,064
Gross profit	72,451	67,058	221,545	193,679
Operating expenses	(75,822)	(64,703)	(218,990)	(183,464)
Other income (expense), net	739	(325)	2,576	717
Provision for income taxes	(15)	413	3,774	3,436
Consolidated net income (loss)	(2,617)	1,617	1,357	7,496	$ 2,662	$ 76,946
Inter-segment sales or transfers
Segment reporting information
Revenue, net	0	0	0	0
Direct
Segment reporting information
Revenue, net	33,621	33,592	104,184	104,854
Cost of goods sold	31,989	29,385	95,751	91,955
Gross profit	1,632	4,207	8,433	12,899
Partner
Segment reporting information
Revenue, net	357,590	319,399	1,073,384	921,889
Cost of goods sold	286,771	256,548	860,272	741,109
Gross profit	$ 70,819	$ 62,851	$ 213,112	$ 180,780