Purchased Receivables - Summary of ACL on Purchased Receivables (Details) - Purchased Receivable - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of year	$ 73	$ 94	$ 190
Charge-offs	0	0	0
Recoveries	0	0	0
Charge-offs net of recoveries	0	0	0
Benefit for purchased receivables	0	(21)	(96)
Balance at end of year	0	73	$ 94
Cumulative effect, period of adoption, adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of year	$ (73)
Balance at end of year		$ (73)