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, 2024	Mar. 31, 2023
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	$ (7,583)	$ (6,679)
Change in unrealized gains or losses for the period included in other comprehensive income for assets and liabilities held at end of period	6,453	25,812
Junior subordinated debentures, at fair value
Beginning Balance	(316,440)	(323,639)
Change included in earnings	(7,583)	(6,679)
Change in fair values included in comprehensive income/loss	6,453	25,812
Purchases and issuances	0	0
Sales and settlements	8,026	6,785
Ending Balance	(309,544)	(297,721)
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	16	137
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	(137)	32
Change included in earnings	(16)	(32)
Change in fair values included in comprehensive income/loss	0	0
Purchases and issuances	47	338
Sales and settlements	122	(201)
Ending Balance	16	137
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	3,117	(2,937)
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	109,243	185,017
Change included in earnings	(36)	(7,818)
Change in fair values included in comprehensive income/loss	0	0
Purchases and issuances	1,237	1,601
Sales and settlements	0	0
Ending balance	$ 110,444	$ 178,800