Loan Servicing (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Transfers and Servicing of Financial Assets [Abstract]
Serviced sold mortgage loans	$ 1,470,000,000	$ 1,390,000,000	$ 1,450,000,000
Serviced sold mortgage loans with recourse	2,300,000	2,400,000	2,300,000
Servicing fees included in other service income	900,000	$ 900,000
Mortgage Loans Sold with Recourse, Reserve	$ 3,000		$ 25,000