v3.26.1
Related Party and Party-in-Interest Transactions (Details) - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Morgan Stanley    
Related Party and Party-in-Interest Transactions    
Investment advisory services cost $ 61,485  
Bar Harbor Bankshares 401(k) Plan    
Related Party and Party-in-Interest Transactions    
Investments, at fair value 72,936,966 $ 62,114,885
Net appreciation in fair value of investments $ 7,216,373  
Bar Harbor Bankshares 401(k) Plan | Common Stock of BHB | Company    
Related Party and Party-in-Interest Transactions    
Number of shares held 139,616 145,762
Investments, at fair value $ 4,307,444 $ 4,457,388
Purchases of investment 166,508  
Sale of investment 533,824  
Net appreciation in fair value of investments 13,120  
Dividend income $ 178,621