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Investment Securities - Securities in Continuous Unrealized Loss Position (Details) - USD ($) | Sep. 30, 2022 | Dec. 31, 2021
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Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | $ 77,157,000 | $ 82,923,000
Available-for-sale, less than 12 months, unrealized losses | (4,764,000) | (731,000)
Available-for-sale, 12 months or more, fair value | 55,248,000 | 3,417,000
Available-for-sale, 12 months or more, unrealized losses | (6,241,000) | (39,000)
Held-to-maturity, less than 12 months, fair value | 2,013,000 |
Held-to-maturity, less than 12 months, unrealized losses | (96,000) | 0
Residential Mortgage Backed Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 26,903,000 | 31,346,000
Available-for-sale, less than 12 months, unrealized losses | (1,478,000) | (240,000)
Available-for-sale, 12 months or more, fair value | 19,875,000 | 253,000
Available-for-sale, 12 months or more, unrealized losses | (2,323,000) | (2,000)
Commercial Mortgage Backed Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 8,105,000 | 2,245,000
Available-for-sale, less than 12 months, unrealized losses | (364,000) | (12,000)
Available-for-sale, 12 months or more, fair value | 535,000 | 2,970,000
Available-for-sale, 12 months or more, unrealized losses | (54,000) | (35,000)
Held-to-maturity, less than 12 months, fair value | 1,297,000 |
Held-to-maturity, less than 12 months, unrealized losses | (37,000) |
US Government Agencies Debt Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 4,223,000 | 4,987,000
Available-for-sale, less than 12 months, unrealized losses | (777,000) | (13,000)
Available-for-sale, 12 months or more, fair value | 117,000 | 194,000
Available-for-sale, 12 months or more, unrealized losses | (1,000) | (2,000)
Held-to-maturity, less than 12 months, fair value | 629,000 |
Held-to-maturity, less than 12 months, unrealized losses | (46,000) |
US States and Political Subdivisions Debt Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 3,151,000 | 561,000
Available-for-sale, less than 12 months, unrealized losses | (72,000) | (10,000)
Available-for-sale, 12 months or more, fair value | 512,000 |
Available-for-sale, 12 months or more, unrealized losses | (55,000) |
Held-to-maturity, less than 12 months, fair value | 87,000 |
Held-to-maturity, less than 12 months, unrealized losses | (13,000) |
Corporate Notes [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 13,452,000 | 9,092,000
Available-for-sale, less than 12 months, unrealized losses | (1,387,000) | (52,000)
Available-for-sale, 12 months or more, fair value | 2,707,000 |
Available-for-sale, 12 months or more, unrealized losses | (293,000) |
US Treasury Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 21,323,000 | 34,692,000
Available-for-sale, less than 12 months, unrealized losses | (686,000) | $ (404,000)
Available-for-sale, 12 months or more, fair value | 31,502,000 |
Available-for-sale, 12 months or more, unrealized losses | $ (3,515,000) |

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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