Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-Term Debt And Financing Lease Obligations	$ 462,155	$ 443,092
Less current portion	(16,636)	(13,872)
Long term portion	445,519	429,220
Convertible notes, net
Debt Instrument [Line Items]
Long-Term Debt And Financing Lease Obligations	166,635	164,438
Royalty financing, net
Debt Instrument [Line Items]
Long-Term Debt And Financing Lease Obligations	46,885	46,921
Facility lease obligation
Debt Instrument [Line Items]
Long-Term Debt And Financing Lease Obligations	$ 248,635	$ 231,733