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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) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Junior subordinated debentures, at fair value
Unrealized (losses) gains arising during the period	$ (2,061)	$ (19,677)	$ 4,008	$ (8,503)
Level 3 | 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	(7,588)	(7,603)	(22,719)	(21,331)
Change in unrealized gains or losses for the period included in other comprehensive income for assets and liabilities held at end of period	(2,061)	(19,677)	4,008	(8,503)
Junior subordinated debentures, at fair value
Beginning Balance	(310,187)	(312,872)	(316,440)	(323,639)
Change included in earnings	(7,588)	(7,603)	(22,719)	(21,331)
Change in fair values included in comprehensive income/loss	(2,061)	(19,677)	4,008	(8,503)
Purchases and issuances	0	0	0	0
Sales and settlements	7,940	8,607	23,255	21,928
Ending Balance	(311,896)	(331,545)	(311,896)	(331,545)
Level 3 | 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	82	(427)	82	(427)
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	0	0
Interest rate lock commitments, net
Beginning Balance	(452)	(51)	(137)	32
Change included in earnings	142	(122)	56	(288)
Change in fair values included in comprehensive income/loss	0	0	0	0
Purchases and issuances	297	(685)	(894)	(663)
Sales and settlements	95	431	1,057	492
Ending Balance	82	(427)	82	(427)
Level 3 | 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	(6,540)	5,308	(2,185)	129
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	0	0
Residential mortgage servicing rights
Beginning balance	110,039	172,929	109,243	185,017
Change included in earnings	(9,667)	507	(11,648)	(14,350)
Change in fair values included in comprehensive income/loss	0	0	0	0
Purchases and issuances	1,547	1,658	4,324	4,427
Sales and settlements	0	(57,454)	0	(57,454)
Ending balance	$ 101,919	$ 117,640	$ 101,919	$ 117,640

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