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7. Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Total debt $ 304,096 $ 316,826
Debt - current 0 13,335
Debt - long term 304,096 303,491
Wells Fargo Credit Facility    
Total debt 14,000 15,000
4.25% Convertible Notes    
Total debt 100,818 99,776
Treximet Secured Notes    
Total debt $ 189,278 $ 202,050