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Basis of Presentation (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]          
Customer deposits $ 654,427   $ 654,427   $ 675,091
Contract asset insurance renewals 82,900   82,900   74,000
Residential mortgage loans available-for-sale fair value 569,387   569,387   516,064
Residential mortgage loans available-for-sale aggregate outstanding principal balance 570,200   570,200   508,500
Net gains from the sale of mortgages 60,700 $ 48,600 $ 111,300 $ 69,200  
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 671,100   $ 671,100   404,700
Forward contracts          
Finite-Lived Intangible Assets [Line Items]          
Derivative, notional amount 947,000   947,000   745,000
Whole loan commitments          
Finite-Lived Intangible Assets [Line Items]          
Derivative, notional amount $ 408,300   $ 408,300   $ 207,900