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Investment Securities - Schedule of Unrealized Loss on Investments and Fair Value for Securities for Which Allowance for Credit Losses has not been Recorded (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Schedule Of Investments [Line Items]    
Available-for-sale, less than 12 months, fair value $ 2,439 $ 59,240
Available-for-sale, less than 12 months, unrealized losses (216) (2,946)
Available-for-sale, 12 months or more, fair value 117,287 69,650
Available-for-sale, 12 months or more, unrealized losses (12,569) (8,150)
Held-to-maturity, less than 12 months, fair value   1,413
Held-to-maturity, less than 12 months, unrealized losses   (60)
Held-to-maturity, 12 months or more, fair value 1,183 356
Held-to-maturity, 12 months or more, unrealized losses (89) (33)
Residential Mortgage Backed Securities [Member]    
Schedule Of Investments [Line Items]    
Available-for-sale, less than 12 months, fair value 105 19,876
Available-for-sale, less than 12 months, unrealized losses (5) (952)
Available-for-sale, 12 months or more, fair value 36,860 23,903
Available-for-sale, 12 months or more, unrealized losses (4,066) (2,752)
Commercial Mortgage Backed Securities [Member]    
Schedule Of Investments [Line Items]    
Available-for-sale, less than 12 months, fair value 1,532 9,720
Available-for-sale, less than 12 months, unrealized losses (13) (357)
Available-for-sale, 12 months or more, fair value 7,934 1,247
Available-for-sale, 12 months or more, unrealized losses (508) (123)
Held-to-maturity, less than 12 months, fair value   1,126
Held-to-maturity, less than 12 months, unrealized losses   (41)
Held-to-maturity, 12 months or more, fair value 674  
Held-to-maturity, 12 months or more, unrealized losses (30)  
US Government Agencies Debt Securities [Member]    
Schedule Of Investments [Line Items]    
Available-for-sale, 12 months or more, fair value 4,176 4,270
Available-for-sale, 12 months or more, unrealized losses (919) (846)
Held-to-maturity, less than 12 months, fair value   214
Held-to-maturity, less than 12 months, unrealized losses   (7)
Held-to-maturity, 12 months or more, fair value 453 356
Held-to-maturity, 12 months or more, unrealized losses (49) (33)
US States and Political Subdivisions Debt Securities [Member]    
Schedule Of Investments [Line Items]    
Available-for-sale, less than 12 months, fair value   1,559
Available-for-sale, less than 12 months, unrealized losses   (41)
Available-for-sale, 12 months or more, fair value 1,543 513
Available-for-sale, 12 months or more, unrealized losses (90) (53)
Held-to-maturity, less than 12 months, fair value   73
Held-to-maturity, less than 12 months, unrealized losses   (12)
Held-to-maturity, 12 months or more, fair value 56  
Held-to-maturity, 12 months or more, unrealized losses (10)  
Corporate Notes [Member]    
Schedule Of Investments [Line Items]    
Available-for-sale, less than 12 months, fair value 802 6,845
Available-for-sale, less than 12 months, unrealized losses (198) (898)
Available-for-sale, 12 months or more, fair value 13,879 8,075
Available-for-sale, 12 months or more, unrealized losses (2,893) (1,000)
US Treasury Securities [Member]    
Schedule Of Investments [Line Items]    
Available-for-sale, less than 12 months, fair value   21,240
Available-for-sale, less than 12 months, unrealized losses   (698)
Available-for-sale, 12 months or more, fair value 52,895 31,642
Available-for-sale, 12 months or more, unrealized losses $ (4,093) $ (3,376)