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Securities - Held-to-Maturity Securities Held by Company (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
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Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 284,009,000 | $ 0
Gross Unrealized Gains | 668,000 |
Gross Unrealized Losses | 2,389,000 |
Fair Value | 282,288,000 | $ 0
U.S. Treasuries |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 86,689,000 |
Gross Unrealized Gains | 279,000 |
Gross Unrealized Losses | 600,000 |
Fair Value | 86,368,000 |
Obligations of U.S. Government sponsored entities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 197,320,000 |
Gross Unrealized Gains | 389,000 |
Gross Unrealized Losses | 1,789,000 |
Fair Value | $ 195,920,000 |

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- Definition Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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- Definition Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123581744&loc=SL120269820-111563 + Details
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