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Securities - Schedule of Required Fair Value Disclosures for Equity Securities (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]      
Fair value at beginning of period $ 2,170 $ 2,363 $ 2,363
Fair value at beginning of period, including equity securities acquired in business combination     2,170
Unrealized Gains 382 16 25
Unrealized Losses 17 491 218
Fair value at end of period 2,535 1,888 2,170
CRA Mutual Fund      
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]      
Fair value at beginning of period 1,065 1,045 1,045
Fair value at beginning of period, including equity securities acquired in business combination     1,065
Unrealized Gains 0 16 25
Unrealized Losses 17 0 5
Fair value at end of period 1,048 1,061 1,065
Stock in other banks      
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]      
Fair value at beginning of period 1,105 1,318 1,318
Fair value at beginning of period, including equity securities acquired in business combination     1,105
Unrealized Gains 382 0 0
Unrealized Losses 0 491 213
Fair value at end of period $ 1,487 $ 827 $ 1,105