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2. Finance Receivables (Details-Allowance for finance credit losses) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Finance Receivables        
Balance at beginning of period $ 90,168 $ 74,541 $ 75,603 $ 61,460
Provision for credit losses on finance receivables 46,262 37,411 134,881 106,533
Charge-offs (46,839) (38,608) (134,674) (105,273)
Recoveries 7,252 5,415 21,033 16,037
Balance at end of period $ 96,843 $ 78,759 $ 96,843 $ 78,759