Quarterly report [Sections 13 or 15(d)]

Fair Value Measurements - Quantitative Information about Level 3 Fair Value Assumptions for Assets Measured at Fair Value on Non-Recurring Basis (Detail)

v3.25.3
Fair Value Measurements - Quantitative Information about Level 3 Fair Value Assumptions for Assets Measured at Fair Value on Non-Recurring Basis (Detail) - Significant Unobservable Inputs - Non-recurring Basis
$ in Thousands
Sep. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 11,821 $ 3,467
Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 11,821 3,467
Retail | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 554 $ 1,377
Alternative Investment, Valuation Technique [Extensible List] us-gaap:MarketApproachValuationTechniqueMember us-gaap:MarketApproachValuationTechniqueMember
Retail | Minimum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.045) (0.045)
Retail | Maximum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range 0.006 0.030
Retail | Weighted Average | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.025) (0.010)
Hospitality | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 399 $ 215
Alternative Investment, Valuation Technique [Extensible List] us-gaap:MarketApproachValuationTechniqueMember us-gaap:MarketApproachValuationTechniqueMember
Hospitality | Minimum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.005) (0.011)
Hospitality | Maximum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range 0 0.017
Hospitality | Weighted Average | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0) 0.005
Office | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 10,566  
Alternative Investment, Valuation Technique [Extensible List] us-gaap:MarketApproachValuationTechniqueMember  
Office | Minimum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.026)  
Office | Maximum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.004)  
Office | Weighted Average | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.014)  
Residential | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 302 $ 1,875
Alternative Investment, Valuation Technique [Extensible List] us-gaap:MarketApproachValuationTechniqueMember us-gaap:MarketApproachValuationTechniqueMember
Residential | Minimum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.014) (0.011)
Residential | Maximum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range 0.003 0.008
Residential | Weighted Average | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.005) (0.002)
Repossessed Personal Property    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 412 $ 568
Alternative Investment, Valuation Technique [Extensible List] us-gaap:MarketApproachValuationTechniqueMember us-gaap:MarketApproachValuationTechniqueMember
Other Real Estate Owned    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 1,995 $ 117
Alternative Investment, Valuation Technique [Extensible List] us-gaap:MarketApproachValuationTechniqueMember us-gaap:MarketApproachValuationTechniqueMember
Other Real Estate Owned | Minimum    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.011) 0
Other Real Estate Owned | Maximum    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range 0.017 0.005
Other Real Estate Owned | Weighted Average    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range 0.001 0.004