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	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residential mortgage servicing rights, at fair value	$ 123,615	$ 92,907	$ 115,010	$ 169,025
Derivative assets	177,423	342,510
Junior subordinated debentures, at fair value	293,081	255,217
Residential mortgage servicing rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residential mortgage servicing rights, at fair value	123,615
Interest rate lock commitments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	4,641	28,144
Junior Subordinated Debentures
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Junior subordinated debentures, at fair value	293,081
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residential mortgage servicing rights, at fair value	123,615	92,907
Junior subordinated debentures, at fair value	293,081	255,217
Level 3 | Interest rate lock commitments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	$ 4,641	$ 28,144
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	0.1275
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	0.0957
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	0.1024
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	0.0900
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	0.3519
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	0.1488
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	0.0373
Level 3 | Discounted cash flow | Junior Subordinated Debentures | Minimum | Credit spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.0295
Level 3 | Discounted cash flow | Junior Subordinated Debentures | Maximum | Credit spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.0417
Level 3 | Internal pricing model | Interest rate lock commitments | Weighted Average | Pull-through rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset, Measurement Input	0.8783
Level 3 | Internal pricing model | Interest rate lock commitments | Minimum | Pull-through rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset, Measurement Input	0.7699
Level 3 | Internal pricing model | Interest rate lock commitments | Maximum | Pull-through rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset, Measurement Input	1.0000