v3.26.1
Qualified Affordable Housing Project Investments - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Investment Program, Proportional Amortization Method, Elected [Line Items]          
Investments in qualified affordable housing projects included in other assets $ 17,643   $ 17,643   $ 16,386
Unfunded commitments related to the investments in qualified affordable housing projects 5,981   5,981   $ 5,113
Recognized amortization expense 371 $ 366 743 $ 716  
Recognized tax credits and other benefits from its investments in affordable housing tax credits 456 416 913 832  
Impairment losses related to its investments in qualified affordable housing projects $ 0 $ 0 $ 0 $ 0  
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] Other Assets   Other Assets   Other Assets
Investment Program Proportional Amortization Method Applied Income Tax Credit And Other Tax Benefit Amortization Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag true true true true  
Investment Program, Proportional Amortization Method Elected Income Tax Credit And Other Income Tax Benefit Before Amortization Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag true true true true  
Investment Program, Proportional Amortization Method Elected Income Tax Credit And Other Income Tax Benefit Before Amortization Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag true true true true