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Summary of Significant Accounting Policies - Schedule of CECL adoption (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2022
Sep. 30, 2020
Dec. 31, 2019
Dec. 31, 2022
Dec. 31, 2021
Oct. 01, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Accounting Standards Update [Extensible List]   Accounting Standards Update 2016-13 Accounting Standards Update 2016-13 Accounting Standards Update 2016-13      
Allowance for credit losses on loans $ 22,874   $ 22,113   $ 22,983 $ 23,023  
Allowance for credit losses on unfunded commitments     1,697        
Unallocated              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans     1,265        
Commercial | Commercial and industrial              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans 2,530   2,525   1,794 1,709  
Commercial real estate | Commercial owner-occupied              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans 2,778   3,135   2,487 2,776  
Commercial real estate | Commercial investor-owned              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans 12,682   11,624   12,676 12,739  
Commercial real estate | Construction              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans 1,557   860   1,937 1,653  
Residential loans | Home equity              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans 738   1,038   558 595  
Residential loans | Other residential              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans 998   1,260   595 644  
Consumer loans | Installment and other consumer loans              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans 291   406   $ 868 $ 621  
Cumulative Effect, Period of Adoption, Adjustment              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans 748            
Financing receivable, current expected credit loss, cumulative adjustment on retained earnings, before tax (1,604)            
Financing receivable, current expected credit loss, cumulative adjustment on retained earnings, tax 474            
Financing receivable, current expected credit loss, cumulative adjustment on retained earnings, after tax (1,130)            
Financing receivable, current expected credit loss, cumulative adjustment on net income, before tax 856            
Financing receivable, current expected credit loss, cumulative adjustment on net income, tax (253)            
Financing receivable, current expected credit loss, cumulative adjustment on net income, after tax 603            
Off-balance sheet, credit loss, liability, current expected credit loss, cumulative adjustment, before tax 1,082            
Off-balance sheet, credit loss, liability, current expected credit loss, cumulative adjustment on retained earnings, before tax (122)            
Off-balance sheet, credit loss, liability, current expected credit loss, cumulative adjustment on retained earnings, tax 36            
Off-balance sheet, credit loss, liability, current expected credit loss, cumulative adjustment on retained earnings, after tax (86)            
Off-balance sheet, credit loss, liability, current expected credit loss, cumulative adjustment on net income, before tax (960)            
Off-balance sheet, credit loss, liability, current expected credit loss, cumulative adjustment on net income, tax 284            
Off-balance sheet, credit loss, liability, current expected credit loss, cumulative adjustment on net income, after tax $ (676)            
Allowance for credit losses on loans     1,604       $ 23,717
Cumulative Effect, Period of Adoption, Adjustment | Commercial | Commercial and industrial              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans     (278)       2,247
Cumulative Effect, Period of Adoption, Adjustment | Commercial real estate | Commercial owner-occupied              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans     138       3,273
Cumulative Effect, Period of Adoption, Adjustment | Commercial real estate | Commercial investor-owned              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans     1,755       13,379
Cumulative Effect, Period of Adoption, Adjustment | Commercial real estate | Construction              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans     201       1,061
Cumulative Effect, Period of Adoption, Adjustment | Residential loans | Home equity              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans     (361)       677
Cumulative Effect, Period of Adoption, Adjustment | Residential loans | Other residential              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans     (212)       1,048
Cumulative Effect, Period of Adoption, Adjustment | Consumer loans | Installment and other consumer loans              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans     $ (125)       281
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             1,604
Allowance for credit losses on unfunded commitments             122
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Unallocated              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             486
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Commercial | Commercial and industrial              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             (278)
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Commercial real estate | Commercial owner-occupied              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             138
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Commercial real estate | Commercial investor-owned              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             1,755
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Commercial real estate | Construction              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             201
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Residential loans | Home equity              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             (361)
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Residential loans | Other residential              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             (212)
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Consumer loans | Installment and other consumer loans              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             (125)
Cumulative Effect, Period of Adoption, Adjusted Balance              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             23,717
Allowance for credit losses on unfunded commitments             1,819
Cumulative Effect, Period of Adoption, Adjusted Balance | Unallocated              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             1,751
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial | Commercial and industrial              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             2,247
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial real estate | Commercial owner-occupied              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             3,273
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial real estate | Commercial investor-owned              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             13,379
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial real estate | Construction              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             1,061
Cumulative Effect, Period of Adoption, Adjusted Balance | Residential loans | Home equity              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             677
Cumulative Effect, Period of Adoption, Adjusted Balance | Residential loans | Other residential              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             1,048
Cumulative Effect, Period of Adoption, Adjusted Balance | Consumer loans | Installment and other consumer loans              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit losses on loans             $ 281