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Investment Securities - Textual (Details) | 12 Months Ended
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Dec. 31, 2020 USD ($) security | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Schedule of Available-for-sale Securities |  |  |
Unrealized gain (loss) on available for sale portfolio | $ 21,091,000 | $ 3,999,000 |
Tax liabilities (benefits) associated with available-for-sale portfolio | 6,235,000 | 1,182,000 |
Remaining unaccreted balance of HTM securities |  | 0 |
Income tax impact from the reclassification of unrealized net gains on available-for-sale securities to | 1,257,000 | $ 1,537,000 | $ 388,000
Threshold Period of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment |  | 12 months |
Threshold Percentage of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment |  | 10.00% |
Threshold Amount of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment |  | $ 10,000 |
Other than temporary impairment losses on investment securities | 0 |  |
Debt securities, amortized cost | 689,001,000 | 466,747,000 |
Available-for-sale investment securities, Amortized cost | 689,001,000 | 466,747,000 |
Securities pledged as collateral | $ 185,053,000 | 91,677,000 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security | 1 |  |
Securities Pledged as Collateral |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale investment securities, Amortized cost | $ 178,561,000 | 89,158,000 |
U.S. Government agencies |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale Securities, Number of Positions | security | 1 |  |
Debt securities, amortized cost | $ 651,000 | 14,740,000 |
Obligations of states and political subdivisions |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale Securities, Number of Positions | security | 106 |  |
Debt securities, amortized cost | $ 361,734,000 | 89,574,000 |
Obligations of states and political subdivisions | Less than 12 months |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | security | 6 |  |
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale Securities, Number of Positions | security | 113 |  |
Debt securities, amortized cost | $ 214,203,000 | 198,125,000 |
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations | Less than 12 months |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | security | 9 |  |
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations | Greater than 12 months |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | security | 16 |  |
Private label residential mortgage and asset backed securities |  |  |
Schedule of Available-for-sale Securities |  |  |
Unrealized gain (loss) on available for sale portfolio | $ 1,095,000 |  |
Available-for-sale Securities, Number of Positions | security | 31 |  |
Debt securities, amortized cost | $ 82,413,000 | 155,308,000 |
Private label residential mortgage and asset backed securities | External Credit Rating, Non Investment Grade [Member] |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale Securities, Number of Positions | security | 7 |  |
Debt securities, amortized cost | $ 812,000 |  |
Private label residential mortgage and asset backed securities | Less than 12 months |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | security | 6 |  |
Private label residential mortgage and asset backed securities | Greater than 12 months |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions | security | 0 |  |
Corporate Debt Securities [Member] |  |  |
Schedule of Available-for-sale Securities |  |  |
Available-for-sale Securities, Number of Positions | security | 9 |  |
Debt securities, amortized cost | $ 30,000,000 | $ 9,000,000 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security | 3 |  |

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