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Investment Securities - Schedule of Investment Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Marketable Securities [Line Items] |  |
Amortized Cost | $ 664,271 | $ 338,047
Gross Unrealized Gains | 13,138 | 19,679
Gross Unrealized Losses | (3,956) | 0
Fair Value | 673,453 | 357,726
State and political subdivisions |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 359,187 | 287,059
Gross Unrealized Gains | 12,931 | 18,915
Gross Unrealized Losses | (990) | 0
Fair Value | 371,128 | 305,974
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 170,711 | 50,988
Gross Unrealized Gains | 135 | 764
Gross Unrealized Losses | (2,200) | 0
Fair Value | 168,646 | $ 51,752
Corporate bonds |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 84,538 |
Gross Unrealized Gains | 72 |
Gross Unrealized Losses | (272) |
Fair Value | 84,338 |
Asset backed securities issued or guaranteed by U.S. Government agencies or sponsored enterprises |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 49,835 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | (494) |
Fair Value | $ 49,341 |

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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=123581744&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss 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 (c) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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- Definition Amortized cost excluding accrued interest, after allowance for credit loss, of 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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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