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Securities Available for Sale (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | $ 547,711 | $ 419,795
Gross Unrealized Gains | 28,395 | 13,504
Gross Unrealized Losses | (506) | (1,066)
Fair Value | 575,600 | 432,233
U.S. Treasury and U.S. government sponsored entities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 11,798 | 3,773
Gross Unrealized Gains | 101 | 41
Gross Unrealized Losses | (54) | (3)
Fair Value | 11,845 | 3,811
State and political subdivisions |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 344,160 | 250,905
Gross Unrealized Gains | 22,350 | 10,944
Gross Unrealized Losses | (204) | (424)
Fair Value | 366,306 | 261,425
Mortgage-backed securities - residential |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 157,106 | 145,886
Gross Unrealized Gains | 4,919 | 2,396
Gross Unrealized Losses | (243) | (372)
Fair Value | 161,782 | 147,910
Collateralized mortgage obligations |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 25,654 | 11,459
Gross Unrealized Gains | 742 | 101
Gross Unrealized Losses | (3) | (213)
Fair Value | 26,393 | 11,347
Corporate bonds |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 3,582 | 1,238
Gross Unrealized Gains | 132 | 22
Gross Unrealized Losses | (2) | 0
Fair Value | 3,712 | 1,260
Small Business Administration |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 5,411 | 6,534
Gross Unrealized Gains | 151 | 0
Gross Unrealized Losses | 0 | (54)
Fair Value | $ 5,562 | $ 6,480

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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