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13. Debt and Lines of Credit (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Total debt $ 301,424 $ 316,826
Debt - current 11,103 13,335
Debt - long term 290,321 303,491
Wells Fargo Credit Facility    
Total debt 14,000 15,000
4.25% Convertible Notes    
Total debt 104,071 99,776
Treximet Secured Notes    
Total debt $ 183,353 $ 202,050