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10. Fair Value Measurements (Details Narrative) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Fair Value Measurements Details Narrative    
Finance receivables related to reposessed vehicles in inventory $ 32,032 $ 40,069
Valuation adjustment, loss allowance $ 22,848 28,924
Recovery rate 29.00%  
Estimated fair value and carrying amount of repossed inventory $ 9,184 $ 11,145