Residential Mortgage Servicing Rights (Sensitivity Analysis of Current Fair Value to Changes in Discount and Prepayment Speed Assumptions) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Transfers and Servicing [Abstract]
Effect on fair value of a 10% adverse change	$ (6,442)	$ (5,611)
Effect on fair value of a 20% adverse change	(12,092)	(10,833)
Effect on fair value of a 100 basis point adverse change	(4,643)	(3,339)
Effect on fair value of a 200 basis point adverse change	$ (8,942)	$ (6,448)