Accounts Receivable - Reserve For Uncollectible Overdrawn Accounts (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Uncollectible Overdrawn Accounts [Roll Forward]
Provision for uncollectible overdrawn accounts from purchase transactions	$ 1,316	$ 2,496
Overdrawn cardholder balances from purchase transactions
Uncollectible Overdrawn Accounts [Roll Forward]
Balance, beginning of period	3,398	2,710
Provision for uncollectible overdrawn accounts from purchase transactions	1,316	2,496
Charge-offs	(1,034)	(1,877)
Balance, end of period	$ 3,680	$ 3,329