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Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | $ 790,294 | $ 547,711
Gross Unrealized Gains | 19,970 | 28,395
Gross Unrealized Losses | (7,398) | (506)
Fair Value | 802,866 | 575,600
U.S. Treasury and U.S. government sponsored entities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 17,356 | 11,798
Gross Unrealized Gains | 79 | 101
Gross Unrealized Losses | (370) | (54)
Fair Value | 17,065 | 11,845
State and political subdivisions |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 447,203 | 344,160
Gross Unrealized Gains | 15,903 | 22,350
Gross Unrealized Losses | (2,689) | (204)
Fair Value | 460,417 | 366,306
Mortgage-backed securities - residential |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 301,457 | 157,106
Gross Unrealized Gains | 3,366 | 4,919
Gross Unrealized Losses | (4,301) | (243)
Fair Value | 300,522 | 161,782
Collateralized mortgage obligations - residential |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 15,499 | 25,654
Gross Unrealized Gains | 440 | 742
Gross Unrealized Losses | (4) | (3)
Fair Value | 15,935 | 26,393
Corporate bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 3,679 | 3,582
Gross Unrealized Gains | 92 | 132
Gross Unrealized Losses | (34) | (2)
Fair Value | 3,737 | 3,712
Small Business Administration |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 5,100 | 5,411
Gross Unrealized Gains | 90 | 151
Gross Unrealized Losses | 0 | 0
Fair Value | $ 5,190 | $ 5,562

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