3. Fair Value Measurement (Debt Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt instruments, fair value	$ 182,779	$ 271,375
Debt instruments, carrying value	290,057	325,046
4.25% Convertible Notes
Debt instruments, fair value	32,595	68,637
Debt instruments, carrying value	104,071	99,776
Derivative Liability
Debt instruments, fair value	230	9,165
Debt instruments, carrying value	230	9,165
Contingent Consideration
Debt instruments, fair value	2,403	14,055
Debt instruments, carrying value	2,403	14,055
Treximet Secured Notes
Debt instruments, fair value	147,551	179,518
Debt instruments, carrying value	$ 183,353	$ 202,050