3. Fair Value Measurement (Debt Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Debt instruments, fair value	$ 183,665	$ 271,375
Debt instruments, carrying value	295,106	325,046
4.25% Convertible Notes
Debt instruments, fair value	31,350	68,637
Debt instruments, carrying value	102,953	99,776
Derivative Liability
Debt instruments, fair value	2,421	9,165
Debt instruments, carrying value	2,421	9,165
Contingent Consideration
Debt instruments, fair value	5,097	14,055
Debt instruments, carrying value	5,097	14,055
Treximet Secured Notes
Debt instruments, fair value	144,797	179,518
Debt instruments, carrying value	$ 184,635	$ 202,050