ACCRUED LIABILITIES (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ACCRUED LIABILITIES
Accrued compensation	$ 11,306	$ 13,196
Royalties payable	11,220	20,555
Other accrued liabilities	30,837	29,180
Total accrued liabilities	$ 53,363	$ 62,931