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2. Finance Receivables (Details - Finance credit losses) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Finance Receivables    
Balance at beginning of year $ 109,187 $ 95,578
Provision for credit losses 40,507 47,167
Charge-offs (56,102) (50,299)
Recoveries 7,252 6,809
Balance at end of year $ 100,844 $ 99,255