XML 61 R53.htm IDEA: XBRL DOCUMENT v3.24.0.1
Summary of Significant Accounting Policies - Additional Information (Details)
 12 Months Ended
Dec. 31, 2023
USD ($)
Portfolio
TradingSecurities
Dec. 31, 2022
USD ($)
TradingSecurities
Jan. 01, 2023
USD ($)
Dec. 31, 2021
USD ($)
Finite Lived Intangible Assets [Line Items]        
Maximum maturity period for cash equivalents 90 days      
Number of investment portfolios | Portfolio 3      
Number of securities held as trading securities | TradingSecurities 0 0    
Decrease to retained earnings $ 90,593,000 $ 85,135,000   $ 90,064,000
Allowance for credit losses $ 10,507,000 9,422,000   8,320,000
Core Deposits [Member]        
Finite Lived Intangible Assets [Line Items]        
Finite-lived intangible asset, useful life 7 years      
Minimum [Member]        
Finite Lived Intangible Assets [Line Items]        
Useful lives of premises and equipment 3 years      
Maximum [Member]        
Finite Lived Intangible Assets [Line Items]        
Useful lives of premises and equipment 40 years      
Impact of Adopting CECL [Member]        
Finite Lived Intangible Assets [Line Items]        
Transition adjustment increase in allowance for credit losses     $ 2,400,000  
Decrease to retained earnings $ (1,811,000)      
Allowance for credit losses 2,123,000   2,123,000  
Retained Earnings [Member]        
Finite Lived Intangible Assets [Line Items]        
Decrease to retained earnings 109,959,000 104,460,000   $ 98,428,000
Retained Earnings [Member] | Impact of Adopting CECL [Member]        
Finite Lived Intangible Assets [Line Items]        
Decrease to retained earnings (1,811,000)   (1,800,000)  
Reserve for Unfunded Commitments [Member]        
Finite Lived Intangible Assets [Line Items]        
Allowance for credit losses $ 600,000 $ 0    
Reserve for Unfunded Commitments [Member] | Impact of Adopting CECL [Member]        
Finite Lived Intangible Assets [Line Items]        
Allowance for credit losses     $ 300,000