Fair Value Measurement (Schedule Of Reconciliation Of Assets And Liabilities Measured At Fair Value Using Significant Unobservable Inputs (Level 3) On A Recurring Basis) (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Junior subordinated debentures, at fair value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized gains or losses for the period included in earnings for assets and liabilities held at end of period	$ (6,555)	$ (7,583)
Change in unrealized gains or losses for the period included in other comprehensive income for assets and liabilities held at end of period	9,551	6,453
Junior subordinated debentures, at fair value
Beginning Balance	(330,895)	(316,440)
Change included in earnings	(6,555)	(7,583)
Change in fair values included in comprehensive income/loss	9,551	6,453
Purchases and issuances	0	0
Sales and settlements	7,125	8,026
Ending Balance	(320,774)	(309,544)
Interest rate lock commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized gains or losses for the period included in earnings for assets and liabilities held at end of period	278	16
Change in unrealized gains or losses for the period included in other comprehensive income for assets and liabilities held at end of period	0	0
Interest rate lock commitments, net
Beginning Balance	(16)	(137)
Change included in earnings	40	(16)
Change in fair values included in comprehensive income/loss	0	0
Purchases and issuances	813	47
Sales and settlements	(559)	122
Ending Balance	278	16
Residential mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized gains or losses for the period included in earnings for assets and liabilities held at end of period	(983)	3,117
Change in unrealized gains or losses for the period included in other comprehensive income for assets and liabilities held at end of period	0	0
Residential mortgage servicing rights
Beginning balance	108,358	109,243
Change included in earnings	(4,124)	(36)
Change in fair values included in comprehensive income/loss	0	0
Purchases and issuances	1,429	1,237
Sales and settlements	0	0
Ending balance	$ 105,663	$ 110,444

Fair Value Measurement (Schedule Of Reconciliation Of Assets And Liabilities Measured At Fair Value Using Significant Unobservable Inputs (Level 3) On A Recurring Basis) (Details) - Level 3 - USD ($)
$ in Thousands

3 Months Ended

Mar. 31, 2025

Mar. 31, 2024

Junior subordinated debentures, at fair value

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Change in unrealized gains or losses for the period included in earnings for assets and liabilities held at end of period

$ (6,555)

$ (7,583)

Change in unrealized gains or losses for the period included in other comprehensive income for assets and liabilities held at end of period

9,551

6,453

Junior subordinated debentures, at fair value