v3.26.1
Loans and ACL - Summary of Aging Analysis of Amortized Cost of Loans Designated as TLMs (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount $ 5,940 $ 5,950
Commercial and Industrial [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 3,102 4,580
Commercial [Member] | Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 490 501
Residential [Member] | Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 2,346 863
Consumer [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 2 6
Current Loans [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 1,660 3,007
Current Loans [Member] | Commercial and Industrial [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 691 2,270
Current Loans [Member] | Commercial [Member] | Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 490 501
Current Loans [Member] | Residential [Member] | Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 479 236
Current Loans [Member] | Consumer [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
30-89 Days Past Due [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 331 0
30-89 Days Past Due [Member] | Commercial and Industrial [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 331 0
30-89 Days Past Due [Member] | Commercial [Member] | Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
30-89 Days Past Due [Member] | Residential [Member] | Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
30-89 Days Past Due [Member] | Consumer [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
Greater than 90 Days Past Due & Accruing [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
Greater than 90 Days Past Due & Accruing [Member] | Commercial and Industrial [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
Greater than 90 Days Past Due & Accruing [Member] | Commercial [Member] | Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
Greater than 90 Days Past Due & Accruing [Member] | Residential [Member] | Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
Greater than 90 Days Past Due & Accruing [Member] | Consumer [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
Non Accrual [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 3,949 2,943
Non Accrual [Member] | Commercial and Industrial [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 2,080 2,310
Non Accrual [Member] | Commercial [Member] | Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 0 0
Non Accrual [Member] | Residential [Member] | Real Estate [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount 1,867 627
Non Accrual [Member] | Consumer [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Financing Receivable, Modified in Period, Amount $ 2 $ 6