Business Segments - Other (Details)	6 Months Ended
	Jun. 30, 2023 item
Mortgage Banking
Business Segments
Number of intersegment lines of credit	2
Mortgage Banking | FHLB Advances | Minimum
Business Segments
Variable rate, spread (as a percent)	0.50%
Mortgage Banking | FHLB Advances | Maximum
Business Segments
Variable rate, spread (as a percent)	1.75%
Consumer Finance.
Business Segments
Floor variable rate (as a percent)	3.50%
Ceiling rate (as a percent)	6.00%
Consumer Finance. | Minimum
Business Segments
Fixed rate (as a percent)	2.90%
Consumer Finance. | Maximum
Business Segments
Fixed rate (as a percent)	5.10%
Consumer Finance. | One month SOFR | Minimum
Business Segments
Variable rate, spread (as a percent)	2.115%