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Debt - Subordinated Debt Facility (Details) - USD ($)
$ in Thousands
Dec. 27, 2016
Mar. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]      
Current portion of note payable   $ 8,185 $ 15,501
Subordinated debt—affiliate   0 $ 5,000
Subordinated Debt | Retailco      
Debt Instrument [Line Items]      
Subordinated borrowing, interest rate 5.00%    
Subordinated debt—affiliate $ 25,000 $ 0  
Subordinated debt, advances $ 1,000    
Subordinated debt, interest rate on advances 5.00%    
Minimum availability under the borrowing base $ 5,000