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Investments in Securities - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Agency mortgage-backed securities |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 47,769 | $ 10,279
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (388) | (831)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 10,583 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (356) |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 58,352 | 10,279
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (744) | (831)
Agency collateralized mortgage obligations |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 92,727 | 12,727
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (1,588) | (375)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 16,298 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (910) |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 109,025 | 12,727
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (2,498) | (375)
States and political subdivisions securities |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 6,537 | 1,164
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (43) | (6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 6,537 | 1,164
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (43) | (6)
Unrealized Losses and Estimated Fair Value |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 147,033 | 24,170
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (2,019) | (1,212)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 26,881 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (1,266) |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 173,914 | 24,170
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | $ (3,285) | $ (1,212)

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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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