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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		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Junior subordinated debentures, at fair value
Unrealized (losses) gains arising during the period	$ (384)	$ (14,638)	$ 6,069	$ 11,174
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	(7,548)	(7,049)	(15,131)	(13,728)
Change in unrealized gains or losses for the period included in other comprehensive income for assets and liabilities held at end of period	(384)	(14,638)	6,069	11,174
Junior subordinated debentures, at fair value
Beginning Balance	(309,544)	(297,721)	(316,440)	(323,639)
Change included in earnings	(7,548)	(7,049)	(15,131)	(13,728)
Change in fair values included in comprehensive income/loss	(384)	(14,638)	6,069	11,174
Purchases and issuances	0	0	0	0
Sales and settlements	7,289	6,536	15,315	13,321
Ending Balance	(310,187)	(312,872)	(310,187)	(312,872)
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	(452)	(51)	(452)	(51)
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	16	137	(137)	32
Change included in earnings	(70)	(134)	(86)	(166)
Change in fair values included in comprehensive income/loss	0	0	0	0
Purchases and issuances	(1,238)	(316)	(1,191)	22
Sales and settlements	840	262	962	61
Ending Balance	(452)	(51)	(452)	(51)
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	1,238	(2,242)	4,355	(5,179)
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	110,444	178,800	109,243	185,017
Change included in earnings	(1,945)	(7,039)	(1,981)	(14,857)
Change in fair values included in comprehensive income/loss	0	0	0	0
Purchases and issuances	1,540	1,168	2,777	2,769
Sales and settlements	0	0	0	0
Ending balance	$ 110,039	$ 172,929	$ 110,039	$ 172,929

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