Loan Servicing (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Transfers and Servicing of Financial Assets [Abstract]
Serviced sold mortgage loans	$ 2,040,000,000.00	$ 1,470,000,000	$ 1,970,000,000
Serviced sold mortgage loans with recourse	2,300,000	2,300,000	1,700,000
Servicing fees included in other service income	1,300,000	$ 900,000
Mortgage Loans Sold with Recourse, Reserve	$ 61,000		$ 30,000