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Residential Mortgage Servicing Rights (Schedule Of Changes In Mortgage Servicing Rights) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Servicing Asset at Fair Value, Amount [Roll Forward]        
Balance, beginning of period $ 100,413 $ 94,346 $ 92,907 $ 115,010
Additions for new MSR capitalized 8,330 13,447 22,395 23,470
Changes due to collection/realization of expected cash flows over time (4,366) (5,042) (8,911) (10,371)
Changes due to valuation inputs or assumptions (1,678) (6,395) (3,692) (31,753)
Balance, end of period $ 102,699 $ 96,356 $ 102,699 $ 96,356