ACCRUED LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ACCRUED LIABILITIES
Accrued royalties	$ 42,700	$ 72,103
Accrued clinical trials	39,921	29,143
Accrued Medicaid and Medicare rebates	14,707	20,565
Accrued bonus	18,141	13,971
Accrued benefits and incentive compensation	14,359	8,603
Other accrued costs	30,816	19,248
Accrued liabilities	$ 160,644	$ 163,633