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2. Finance Receivables (Details-Repossessions) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Finance Receivables    
Gross balance of repossessions in inventory $ 32,032 $ 40,069
Allowance for losses on repossessed inventory (22,848) (28,924)
Net repossessed inventory included in other assets $ 9,184 $ 11,145