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INVESTMENT SECURITIES - Securities with unrealized losses (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale And Held-to-maturity [Line Items]    
Held to maturity, Less than 12 months, Fair Value $ 66,654,000  
Held to maturity, Less than 12 months, Unrealized losses (4,501,000)  
Held to maturity, 12 months or Longer, Fair Value 11,104,000  
Held to maturity, 12 months or Longer, Unrealized losses (1,148,000)  
Held to maturity, Total fair value 77,758,000  
Held to maturity, Total unrealized losses (5,649,000)  
Less than 12 months, Fair Value   $ 17,937,000
Less than 12 months, Unrealized Losses   (164,000)
12 months or Longer, Fair Value   521,000
12 months or Longer, Unrealized Losses   (18,000)
Total Fair Value   18,458,000
Total Unrealized Losses   (182,000)
Sales 0 0
U.S. Treasury debt    
Debt Securities, Available-for-sale And Held-to-maturity [Line Items]    
Held to maturity, 12 months or Longer, Fair Value 232,000  
Held to maturity, 12 months or Longer, Unrealized losses (9,000)  
Held to maturity, Total fair value 232,000  
Held to maturity, Total unrealized losses (9,000)  
Less than 12 months, Fair Value   247,000
Less than 12 months, Unrealized Losses   (3,000)
Total Fair Value   247,000
Total Unrealized Losses   (3,000)
U.S. Government Agency    
Debt Securities, Available-for-sale And Held-to-maturity [Line Items]    
Held to maturity, Less than 12 months, Fair Value 249,000  
Held to maturity, Less than 12 months, Unrealized losses (2,000)  
Held to maturity, Total fair value 249,000  
Held to maturity, Total unrealized losses (2,000)  
Corporate bonds    
Debt Securities, Available-for-sale And Held-to-maturity [Line Items]    
Held to maturity, Less than 12 months, Fair Value 21,764,000  
Held to maturity, Less than 12 months, Unrealized losses (1,629,000)  
Held to maturity, 12 months or Longer, Fair Value 460,000  
Held to maturity, 12 months or Longer, Unrealized losses (12,000)  
Held to maturity, Total fair value 22,224,000  
Held to maturity, Total unrealized losses (1,641,000)  
Less than 12 months, Fair Value   485,000
Less than 12 months, Unrealized Losses   (15,000)
Total Fair Value   485,000
Total Unrealized Losses   (15,000)
Government National Mortgage Association ("GNMA") mortgage-backed securities - residential    
Debt Securities, Available-for-sale And Held-to-maturity [Line Items]    
Held to maturity, Less than 12 months, Fair Value 28,987,000  
Held to maturity, Less than 12 months, Unrealized losses (1,605,000)  
Held to maturity, 12 months or Longer, Fair Value 10,000,000  
Held to maturity, 12 months or Longer, Unrealized losses (1,105,000)  
Held to maturity, Total fair value 38,987,000  
Held to maturity, Total unrealized losses (2,710,000)  
Less than 12 months, Fair Value   17,205,000
Less than 12 months, Unrealized Losses   (146,000)
Total Fair Value   17,205,000
Total Unrealized Losses   (146,000)
Federal National Mortgage Association ("FNMA") mortgage-backed securities - residential    
Debt Securities, Available-for-sale And Held-to-maturity [Line Items]    
Held to maturity, Less than 12 months, Fair Value 6,300,000  
Held to maturity, Less than 12 months, Unrealized losses (634,000)  
Held to maturity, Total fair value 6,300,000  
Held to maturity, Total unrealized losses (634,000)  
Government CMO and MBS    
Debt Securities, Available-for-sale And Held-to-maturity [Line Items]    
Held to maturity, Less than 12 months, Fair Value 5,731,000  
Held to maturity, Less than 12 months, Unrealized losses (498,000)  
Held to maturity, Total fair value 5,731,000  
Held to maturity, Total unrealized losses (498,000)  
Corporate CMO and MBS    
Debt Securities, Available-for-sale And Held-to-maturity [Line Items]    
Held to maturity, Less than 12 months, Fair Value 3,623,000  
Held to maturity, Less than 12 months, Unrealized losses (133,000)  
Held to maturity, 12 months or Longer, Fair Value 412,000  
Held to maturity, 12 months or Longer, Unrealized losses (22,000)  
Held to maturity, Total fair value 4,035,000  
Held to maturity, Total unrealized losses $ (155,000)  
12 months or Longer, Fair Value   521,000
12 months or Longer, Unrealized Losses   (18,000)
Total Fair Value   521,000
Total Unrealized Losses   $ (18,000)