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Investment Securities - Schedule of Investment Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 946,511 | $ 372,231
Gross Unrealized Gains | 3,562 | 8,997
Gross Unrealized Losses | (11,909) | (414)
Fair Value | 938,164 | 380,814
U.S. treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 88,638 | 245
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (1,087) | 0
Fair Value | 87,551 | 245
U.S. agency |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 17,916 | 1,000
Gross Unrealized Gains | 5 | 4
Gross Unrealized Losses | (140) | 0
Fair Value | 17,781 | 1,004
State, county and municipal securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 252,632 | 61,298
Gross Unrealized Gains | 877 | 1,155
Gross Unrealized Losses | (3,356) | (65)
Fair Value | 250,153 | 62,388
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 48,153 | 4,250
Gross Unrealized Gains | 520 | 1
Gross Unrealized Losses | (265) | (1)
Fair Value | 48,408 | 4,250
Mortgage-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 539,172 | 305,438
Gross Unrealized Gains | 2,160 | 7,837
Gross Unrealized Losses | (7,061) | (348)
Fair Value | $ 534,271 | $ 312,927

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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, before 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/2003/role/disclosureRef -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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