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Fair Value - Summary of Quantitative Information about Level 3 Fair Value Measurements (Detail) - Fair Value, Nonrecurring [Member] - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Impaired loans, net   $ 54,906
Selling Costs [Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Range   7.00%
OREO   $ 195
Valuation Technique   Discounted appraised value technique
Selling Costs [Member] | Appraised Value Technique Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Collateral dependent loans $ 68,612  
Valuation Technique Discounted appraised value technique  
Unobservable Input Selling Costs  
Impaired loans, net   $ 54,761
Valuation Technique   Discounted appraised value technique
Selling Costs [Member] | Cash Flows Technique [Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Impaired loans, net   $ 145
Selling Costs [Member] | Maximum [Member] | Appraised Value Technique Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Range 10.00%  
Range   10.00%
Selling Costs [Member] | Maximum [Member] | Cash Flows Technique [Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Range   11.00%
Selling Costs [Member] | Minimum [Member] | Appraised Value Technique Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Range 7.00%  
Range   7.00%
Selling Costs [Member] | Minimum [Member] | Cash Flows Technique [Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Range   4.00%
Discount Rate [Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Unobservable Input   Selling Costs
Discount Rate [Member] | Appraised Value Technique Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Unobservable Input   Selling Costs
Discount Rate [Member] | Cash Flows Technique [Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Valuation Technique   Discounted cash flows technique
Unobservable Input   Discount Rate