v3.26.1
Investments - Fair Value and Amortized Cost of Debt Securities by Contractual Maturity (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]    
Available-for-Sale, Amortized Cost, Within one year $ 63,328  
Available-for-Sale, Amortized Cost, One to five years 38,597  
Available-for-Sale, Amortized Cost, Five to ten years 73,618  
Available-for-Sale, Amortized Cost, After ten years 7,311  
Available-for-Sale, Amortized Cost, Small Business Administration loan pools 83,591  
Available-for-Sale, Amortized Cost, Mortgage-backed securities 969,509  
Available-for-Sale, Amortized Cost 1,235,954 $ 1,022,470
Available-for-Sale, Fair Value, Within one year 63,350  
Available-for-Sale, Fair Value, One to five years 38,761  
Available-for-Sale, Fair Value, Five to ten years 72,857  
Available-for-Sale, Fair Value, After ten years 7,215  
Available-for-Sale, Fair Value, Small Business Administration loan pools 83,242  
Available-for-Sale, Fair Value, Mortgage-backed securities 964,267  
Available-for-Sale, Fair Value, Total debt securities 1,229,692 1,030,568
Held-to-Maturity, Amortized Cost, Five to ten years 169  
Held-to-Maturity, Amortized Cost, After ten years 1,110  
Held-to-Maturity, Amortized Cost, Mortgage-backed securities 3,889  
Held-to-Maturity, Amortized Cost 5,168 5,248
Held-to-Maturity, Fair Value, Five to ten years 167  
Held-to-Maturity, Fair Value, After ten years 1,139  
Held-to-Maturity, Fair Value, Mortgage-backed securities 3,931  
Held-to-Maturity, Fair Value, Total debt securities $ 5,237 $ 5,409