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Securities - Schedule of Book Values and Fair Values of Investment Securities by Contractual Maturity (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Amortized Cost    
Due within one year $ 0  
Due after one year but within five years 149,881  
Due after five years but within ten years 35,416  
Due after ten years 0  
Mortgage-backed securities 2,057,381  
Amortized Cost 2,242,678 $ 2,411,117
Fair Value    
Due within one year 0  
Due after one year but within five years 152,847  
Due after five years but within ten years 35,352  
Due after ten years 0  
Mortgage-backed securities 1,860,357  
Total securities 2,048,556 2,043,062
Amortized Cost    
Due within one year 0  
Due after one year but within five years 8,872  
Due after five years but within ten years 243,080  
Due after ten years 254,412  
Mortgage-backed securities 6,735  
Amortized Cost 513,099 519,998
Fair Value    
Due within one year 0  
Due after one year but within five years 8,587  
Due after five years but within ten years 214,751  
Due after ten years 218,578  
Mortgage-backed securities 6,536  
Total securities $ 448,452 $ 428,571