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		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
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	$ (4,348)	$ (2,344)	$ (9,941)	$ (7,087)
Change in unrealized gains or losses for the period included in other comprehensive income for assets and liabilities held at end of period	(4,043)	(11,946)	(31,810)	(44,504)
Junior subordinated debentures, at fair value
Beginning Balance	(321,268)	(287,723)	(293,081)	(255,217)
Change included in earnings	(4,348)	(2,344)	(9,941)	(7,087)
Change in fair values included in comprehensive income/loss	(4,043)	(11,946)	(31,810)	(44,504)
Purchases and issuances	0	0	0	0
Sales and settlements	3,915	2,505	9,088	7,300
Ending Balance	(325,744)	(299,508)	(325,744)	(299,508)
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	(2,266)	8,258	(2,266)	8,258
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	(117)	13,210	4,641	28,144
Change included in earnings	(1,072)	1,301	(7,779)	199
Change in fair values included in comprehensive income/loss	0	0	0	0
Purchases and issuances	1,376	16,007	9,074	67,730
Sales and settlements	(2,453)	(22,260)	(8,202)	(87,815)
Ending Balance	(2,266)	8,258	(2,266)	8,258
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	16,403	(634)	67,451	(4,326)
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	179,558	102,699	123,615	92,907
Change included in earnings	11,425	(5,315)	52,165	(17,918)
Change in fair values included in comprehensive income/loss	0	0	0	0
Purchases and issuances	5,194	8,450	20,397	30,845
Sales and settlements	0	0	0	0
Ending balance	$ 196,177	$ 105,834	$ 196,177	$ 105,834