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RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Related Party Transactions [Line Items]    
Deposit liabilities $ 28,400 $ 46,700
Rent expense 1,000 1,000
Fee income 68,051 58,861
Management | WMG | Operating Segments | Trust Services    
Related Party Transactions [Line Items]    
Fee income 600 700
1365 New Scotland Road, Slingerlands, New York    
Related Party Transactions [Line Items]    
Monthly rent expense 4  
1365 New Scotland Road, Slingerlands, New York | Director    
Related Party Transactions [Line Items]    
Rent expense 25 50
2 Rush Street, Schenectady, New York    
Related Party Transactions [Line Items]    
Monthly rent expense 8  
2 Rush Street, Schenectady, New York | Director    
Related Party Transactions [Line Items]    
Rent expense $ 102 $ 101
Minimum    
Related Party Transactions [Line Items]    
Related party principal ownership threshold (in hundredths) 10.00%