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Basis of Presentation (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]          
Customer deposits $ 470,745   $ 470,745   $ 512,580
Contract asset insurance renewals 90,600   90,600   91,100
Residential mortgage loans available-for-sale fair value 486,066   486,066   629,582
Residential mortgage loans available-for-sale aggregate outstanding principal balance 488,500   488,500   645,700
Net gains from the sale of mortgages 59,600 $ 62,000 $ 169,100 $ 173,200  
Variability in future cash flows of derivative instruments in days     90 days    
Interest rate lock commitments          
Finite-Lived Intangible Assets [Line Items]          
Derivative, notional amount 758,300   $ 758,300   469,400
Forward contracts          
Finite-Lived Intangible Assets [Line Items]          
Derivative, notional amount 1,200,000   1,200,000   977,000
Whole loan commitments          
Finite-Lived Intangible Assets [Line Items]          
Derivative, notional amount $ 192,600   $ 192,600   $ 237,100