Segment Reporting - Summary of Financial Information of Reportable Segments and Reconciliation to Consolidated Financial Results (Parenthetical) (Details) - CCBX - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Reimbursement of expenses	$ 372,000	$ 183,000
Credit Enhancement Recovery
Segment Reporting Information [Line Items]
Revenue not from contracts with customer	13,100,000
Servicing and Other BaaS Fees
Segment Reporting Information [Line Items]
Noninterest income	1,700,000	730,000
Fraud Recovery
Segment Reporting Information [Line Items]
Revenue not from contracts with customer	4,600,000
Interchange Income
Segment Reporting Information [Line Items]
Noninterest income	432,000	$ 35,000
Other
Segment Reporting Information [Line Items]
Noninterest income	$ 69,000