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Advances Schedule of Changes in Allowance for Losses (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Advances [Abstract]    
Beginning balance $ 23,259 $ 16,465
Provision 1,762 2,524
Net charge-offs and other (1,886) (2,009)
Ending balance $ 23,135 $ 16,980