Quarterly report pursuant to Section 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)

v3.21.2
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, 2021
USD ($)
Dec. 31, 2020
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 12,325 $ 63,114
Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 12,325 63,073
Retail | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 2,628 $ 6,330
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 (0.028) (0.045)
Retail | Maximum [Member] | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range 0.023 0.035
Retail | Weighted Average | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.006) 0.014
Other | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 128 $ 8,410
Alternative Investment, Valuation Technique [Extensible List] us-gaap:MarketApproachValuationTechniqueMember us-gaap:MarketApproachValuationTechniqueMember
Other | Minimum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.010) (0.055)
Other | Maximum [Member] | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range 0.005 0.034
Other | Weighted Average | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.003) 0.015
Hospitality | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value   $ 20,612
Alternative Investment, Valuation Technique [Extensible List]   us-gaap:MarketApproachValuationTechniqueMember
Construction | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 7,046 $ 24,854
Alternative Investment, Valuation Technique [Extensible List] us-gaap:MarketApproachValuationTechniqueMember us-gaap:MarketApproachValuationTechniqueMember
Construction | Minimum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.020) (0.020)
Construction | Maximum [Member] | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range 0.010 0.012
Construction | Weighted Average | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.010) (0.008)
Residential/Consumer Loans | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 2,523 $ 2,867
Alternative Investment, Valuation Technique [Extensible List] us-gaap:MarketApproachValuationTechniqueMember us-gaap:MarketApproachValuationTechniqueMember
Residential/Consumer Loans | Minimum | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.020) (0.013)
Residential/Consumer Loans | Maximum [Member] | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range 0.008 0.015
Residential/Consumer Loans | Weighted Average | Real Estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.015) 0.006
Repossessed Personal Property    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 180 $ 857
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 $ 675 $ 2,360
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 (0.020) (0.035)
Other Real Estate Owned | Maximum [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.005) 0.015
Other Real Estate Owned | Weighted Average    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range (0.012) (0.014)
Commercial lines of credit | Commercial and Industrial    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value   $ 41
Alternative Investment, Valuation Technique [Extensible List]   us-gaap:MarketApproachValuationTechniqueMember
Commercial lines of credit | Minimum | Commercial and Industrial    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range   (0.009)
Commercial lines of credit | Maximum [Member] | Commercial and Industrial    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range   0.015
Commercial lines of credit | Weighted Average | Commercial and Industrial    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Range   0.006