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Advances - Schedule of Activity in Advances (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Advances [Roll Forward]    
Beginning balance $ 211,793 $ 257,882
Sales of advances (439) (3)
Collections of advances, charge-offs and other, net (13,719) (25,814)
(Increase) decrease in allowance for losses (515) 2,108
Ending balance $ 197,120 $ 234,173