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Fair Value Measurements - Fair value of assets measured at fair value on a recurring basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Securities available-for-sale:    
Securities available-for-sale, at fair value $ 366,546 $ 239,300
Equity securities, at fair value 1,913 1,869
U.S Treasuries    
Securities available-for-sale:    
Securities available-for-sale, at fair value 58,819 30,543
U.S. government and federal agencies    
Securities available-for-sale:    
Securities available-for-sale, at fair value 34,456 34,537
Corporate bonds    
Securities available-for-sale:    
Securities available-for-sale, at fair value 2,692 1,031
Collateralized mortgage obligations    
Securities available-for-sale:    
Securities available-for-sale, at fair value 40,211 39,049
Tax-exempt municipal    
Securities available-for-sale:    
Securities available-for-sale, at fair value 4,373 5,262
Taxable municipal    
Securities available-for-sale:    
Securities available-for-sale, at fair value 578 1,685
Mortgage-backed    
Securities available-for-sale:    
Securities available-for-sale, at fair value 225,417 127,193
Fair Value, Recurring    
Securities available-for-sale:    
Equity securities, at fair value 1,913 1,869
Total assets at fair value 368,459 241,169
Fair Value, Recurring | U.S Treasuries    
Securities available-for-sale:    
Securities available-for-sale, at fair value 58,819 30,543
Fair Value, Recurring | U.S. government and federal agencies    
Securities available-for-sale:    
Securities available-for-sale, at fair value 34,456 34,537
Fair Value, Recurring | Corporate bonds    
Securities available-for-sale:    
Securities available-for-sale, at fair value 2,692 1,031
Fair Value, Recurring | Collateralized mortgage obligations    
Securities available-for-sale:    
Securities available-for-sale, at fair value 40,211 39,049
Fair Value, Recurring | Tax-exempt municipal    
Securities available-for-sale:    
Securities available-for-sale, at fair value 4,373 5,262
Fair Value, Recurring | Taxable municipal    
Securities available-for-sale:    
Securities available-for-sale, at fair value 578 1,685
Fair Value, Recurring | Mortgage-backed    
Securities available-for-sale:    
Securities available-for-sale, at fair value 225,417 127,193
Fair Value, Recurring | Fair Value, Inputs, Level 1    
Securities available-for-sale:    
Equity securities, at fair value 1,913 1,869
Total assets at fair value 1,913 1,869
Fair Value, Recurring | Fair Value, Inputs, Level 2    
Securities available-for-sale:    
Total assets at fair value 366,546 239,300
Fair Value, Recurring | Fair Value, Inputs, Level 2 | U.S Treasuries    
Securities available-for-sale:    
Securities available-for-sale, at fair value 58,819 30,543
Fair Value, Recurring | Fair Value, Inputs, Level 2 | U.S. government and federal agencies    
Securities available-for-sale:    
Securities available-for-sale, at fair value 34,456 34,537
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Corporate bonds    
Securities available-for-sale:    
Securities available-for-sale, at fair value 2,692 1,031
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Collateralized mortgage obligations    
Securities available-for-sale:    
Securities available-for-sale, at fair value 40,211 39,049
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Tax-exempt municipal    
Securities available-for-sale:    
Securities available-for-sale, at fair value 4,373 5,262
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Taxable municipal    
Securities available-for-sale:    
Securities available-for-sale, at fair value 578 1,685
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Mortgage-backed    
Securities available-for-sale:    
Securities available-for-sale, at fair value $ 225,417 $ 127,193