ACCRUED EXPENSES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
ACCRUED EXPENSES
Payroll and related expenses	$ 16,568	$ 15,048
Royalty expenses	10,171	10,949
Research and development expenses	6,137	2,972
Sales and marketing expenses	10,613	8,017
Rebates, discounts and returns accrual	41,158	38,066
Accrued interest	2,188	0
Purchase option payable	7,000	0
Other	16,672	5,688
Total accrued expenses	$ 110,507	$ 80,740