Fair Value Measurement (Schedule Of A Description Of The Valuation Technique, Unobservable Input, And Qualitative Information For The Company's Assets And Liabilities Classified As Level 3) (Details) $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residential mortgage servicing rights, at fair value	$ 110,444	$ 109,243	$ 178,800	$ 185,017
Asset Derivatives	114,763	38,085
Junior subordinated debentures, at fair value	309,544	316,440
Residential mortgage servicing rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residential mortgage servicing rights, at fair value	110,444
Interest rate lock commitments, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset Derivatives	16
Junior subordinated debentures
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Junior subordinated debentures, at fair value	309,544
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residential mortgage servicing rights, at fair value	110,444	109,243
Junior subordinated debentures, at fair value	$ 309,544	$ 316,440
Level 3 | Discounted cash flow | Residential mortgage servicing rights | Weighted Average | Constant prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.0674
Level 3 | Discounted cash flow | Residential mortgage servicing rights | Weighted Average | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.1024
Level 3 | Discounted cash flow | Residential mortgage servicing rights | Minimum | Constant prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.0607
Level 3 | Discounted cash flow | Residential mortgage servicing rights | Minimum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.0950
Level 3 | Discounted cash flow | Residential mortgage servicing rights | Maximum | Constant prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.2752
Level 3 | Discounted cash flow | Residential mortgage servicing rights | Maximum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.1608
Level 3 | Discounted cash flow | Junior subordinated debentures | Weighted Average | Credit spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.0379
Level 3 | Discounted cash flow | Junior subordinated debentures | Minimum | Credit spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.0211
Level 3 | Discounted cash flow | Junior subordinated debentures | Maximum | Credit spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.0613
Level 3 | Internal pricing model | Interest rate lock commitments, net | Weighted Average | Pull-through rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Liability, Measurement Input	0.8571
Level 3 | Internal pricing model | Interest rate lock commitments, net | Minimum | Pull-through rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Liability, Measurement Input	0.6427
Level 3 | Internal pricing model | Interest rate lock commitments, net | Maximum | Pull-through rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Liability, Measurement Input	1.0000