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5. Debt - Schedule of Long Term Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Debt Disclosure [Abstract]    
Kinergy operating line of credit $ 63,916 $ 61,003
Plant term debt 155,070 162,622
Total debt 218,986 223,625
Less unamortized discount (1,369) (2,299)
Less unamortized debt financing costs (364) (462)
Less short-term portion (153,701) (17,003)
Long-term debt $ 63,552 $ 203,861