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Investment Securities - Securities in Continuous Unrealized Loss Position (Details) - USD ($) | Mar. 31, 2022 | Dec. 31, 2021
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Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | $ 106,638,000 | $ 82,923,000
Available-for-sale, less than 12 months, unrealized losses | (4,832,000) | (731,000)
Available-for-sale, 12 months or more, fair value | 3,272,000 | 3,417,000
Available-for-sale, 12 months or more, unrealized losses | (6,000) | (39,000)
Held-to-maturity, less than 12 months, fair value | 2,159,000 |
Held-to-maturity, less than 12 months, unrealized losses | (32,000) | 0
Residential Mortgage Backed Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 35,249,000 | 31,346,000
Available-for-sale, less than 12 months, unrealized losses | (1,617,000) | (240,000)
Available-for-sale, 12 months or more, fair value | 230,000 | 253,000
Available-for-sale, 12 months or more, unrealized losses | (3,000) | (2,000)
Commercial Mortgage Backed Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 8,724,000 | 2,245,000
Available-for-sale, less than 12 months, unrealized losses | (146,000) | (12,000)
Available-for-sale, 12 months or more, fair value | 2,897,000 | 2,970,000
Available-for-sale, 12 months or more, unrealized losses | (2,000) | (35,000)
Held-to-maturity, less than 12 months, fair value | 1,285,000 |
Held-to-maturity, less than 12 months, unrealized losses | (9,000) |
US Government Agencies Debt Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 4,645,000 | 4,987,000
Available-for-sale, less than 12 months, unrealized losses | (356,000) | (13,000)
Available-for-sale, 12 months or more, fair value | 145,000 | 194,000
Available-for-sale, 12 months or more, unrealized losses | (1,000) | (2,000)
Held-to-maturity, less than 12 months, fair value | 739,000 |
Held-to-maturity, less than 12 months, unrealized losses | (19,000) |
US States and Political Subdivisions Debt Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 2,705,000 | 561,000
Available-for-sale, less than 12 months, unrealized losses | (66,000) | (10,000)
Held-to-maturity, less than 12 months, fair value | 135,000 |
Held-to-maturity, less than 12 months, unrealized losses | (4,000) |
Corporate Notes [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 15,394,000 | 9,092,000
Available-for-sale, less than 12 months, unrealized losses | (526,000) | (52,000)
US Treasury Securities [Member] |  |
Schedule Of Investments [Line Items] |  |
Available-for-sale, less than 12 months, fair value | 39,921,000 | 34,692,000
Available-for-sale, less than 12 months, unrealized losses | $ (2,121,000) | $ (404,000)

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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 http://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 http://asc.fasb.org/extlink&oid=123581744&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 http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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- Definition Amount of accumulated unrealized loss on 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 12 months or longer, 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 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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