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Advances - Schedule of Changes in Allowance for Losses (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Sep. 30, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]      
Beginning balance $ 9,925 $ 23,259  
Provision (reversal) (761) 1,762  
Net charge-offs and other (1,791) (1,886)  
Ending balance 7,373 23,135  
Allowance for losses $ 7,373 $ 23,135  
Sold Advances      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Allowance for losses     $ 18,000