v3.26.1
Available-for-Sale and Held-to-Maturity Securities (Contractual Maturities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available-for-sale Securities, debt maturities, within one year, Fair Value $ 97,619 $ 103,686
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 232,969  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 98,855 241,770
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 1,100,062 1,112,750
Available-for-sale Securities, debt maturities, Fair Value 1,529,505 1,593,390
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost 717,517 1,494,530
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost 5,926,326 4,896,754
Held-to-maturity securities, at amortized cost [1] 6,881,353 6,549,054
U.S. Government Agency Securities [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available-for-sale Securities, debt maturities, within one year, Fair Value 0  
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 2,395  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 0  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 0  
Available-for-sale Securities, debt maturities, Fair Value 2,395  
State and Municipal Securities [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available-for-sale Securities, debt maturities, within one year, Fair Value 0  
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 2,320  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 0  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 0  
Available-for-sale Securities, debt maturities, Fair Value 2,320  
Corporate Fixed Income Securities [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available-for-sale Securities, debt maturities, within one year, Fair Value 97,615  
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 212,442  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 26,404  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 0  
Available-for-sale Securities, debt maturities, Fair Value 336,461  
Mortgage-Backed Securities [Member] | Agency Securities [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available-for-sale Securities, debt maturities, within one year, Fair Value 4  
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 15,812  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 69,409  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 1,024,455  
Available-for-sale Securities, debt maturities, Fair Value 1,109,680 1,101,412
Mortgage-Backed Securities [Member] | Commercial [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available-for-sale Securities, debt maturities, within one year, Fair Value 0  
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 0  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 0  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 1,269  
Available-for-sale Securities, debt maturities, Fair Value 1,269 2,113
Mortgage-Backed Securities [Member] | Non-Agency [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available-for-sale Securities, debt maturities, within one year, Fair Value 0  
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 0  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 133  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 0  
Available-for-sale Securities, debt maturities, Fair Value 133 152
Asset-Backed Securities [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available-for-sale Securities, debt maturities, within one year, Fair Value 0  
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 0  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 2,909  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 74,338  
Available-for-sale Securities, debt maturities, Fair Value 77,247 $ 109,256
Held-to-maturity Securities, debt maturities, within one year, Amortized Cost 0  
Held-to-maturity Securities, debt maturities, after one year through five, Amortized Cost 237,510  
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost 717,517  
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost 5,926,326  
Held-to-maturity securities, at amortized cost $ 6,881,353  
[1] Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.