v3.26.1
Available-for-Sale and Held-to-Maturity Securities (Contractual Maturities) (Details) - USD ($)
$ in Thousands
Mar. 31, 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 $ 97,018 $ 103,686
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 185,654  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 147,558 241,770
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 1,158,319 1,112,750
Available-for-sale Securities, debt maturities, Fair Value 1,588,549 1,593,390
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost 1,145,693 1,494,530
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost 5,539,285 4,896,754
Held-to-maturity securities, at amortized cost [1] 6,861,227 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 2,386  
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 2,386  
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 2,326  
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 2,326  
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 97,012  
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 163,625  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 74,068  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 0  
Available-for-sale Securities, debt maturities, Fair Value 334,705  
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 6  
Available-for-sale Securities, debt maturities, after one year through five, Fair Value 17,317  
Available-for-sale Securities, debt maturities, after five year through ten years, fair value 56,656  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 1,077,152  
Available-for-sale Securities, debt maturities, Fair Value 1,151,131 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 1,318  
Available-for-sale Securities, debt maturities, Fair Value 1,318 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 138  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 0  
Available-for-sale Securities, debt maturities, Fair Value 138 152
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 16,696  
Availably-for-sale Securities, debt maturities, after ten years, Fair Value 79,849  
Available-for-sale Securities, debt maturities, Fair Value 96,545 $ 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 176,249  
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost 1,145,693  
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost 5,539,285  
Held-to-maturity securities, at amortized cost $ 6,861,227  
[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.