Loans Receivable - Aging of the Loans Receivable Balance (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Past due loans receivable	14.10%	15.50%
Current loans receivable	85.90%	84.50%
Balance of Credit Card Loans on Nonaccrual Status	$ 2,562	$ 2,284
30-59 days past due
Financing Receivable, Past Due [Line Items]
Past due loans receivable	6.20%	6.90%
60-89 days past due
Financing Receivable, Past Due [Line Items]
Past due loans receivable	3.20%	3.60%
90 or more days past due
Financing Receivable, Past Due [Line Items]
Past due loans receivable	4.70%	5.00%
Balance of Loans Receivable 90 or More Days Past Due and Still Accruing Interest and Fees	$ 0	$ 0