v3.26.1
Investment and Equity Securities - Amortized Cost and Fair Value of Available for Sale Securities Portfolio (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]    
Due within twelve months, Amortized cost $ 2,250  
Due after one but within five years, Amortized Cost 56,799  
Due after five but within ten years, Amortized Cost 64,633  
Due after ten years, Amortized Cost 258,343  
Available-for-sale Securities, Amortized Cost 382,025 $ 379,272
Due within twelve months, Estimated Fair Value 2,236  
Due after one but within five years, Estimated Fair Value 53,483  
Due after five but within ten years, Estimated Fair Value 59,984  
Due after ten years, Estimated Fair Value 244,068  
Available-for-sale Securities, Estimated Fair Value $ 359,771 $ 357,740
Due within twelve months, Book Yield 1.12%  
Due after one but within five years, Book Yield 1.75%  
Due after five but within ten years, Book Yield 2.84%  
Due after ten years, Book Yield 3.71%  
Total securities available for sale, Book Yield 3.26%