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Investment Securities - Textuals (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Summary of Investment Holdings [Line Items] |  |  |  |
Transfer of investment securities available for sale to held to maturity | $ 244,800,000 | $ 244,778,000 | $ 0 | $ 0
Investment securities classified as trading | 0 | 0 | 0 |
Investment securities classified as held to maturity | 383,393,000 | 383,393,000 | 0 |
ACL on investment securities available for sale | 0 | 0 | 0 | 0
Investment securities held to maturity classified as past due | 0 | 0 |  |
Investment securities held to maturity classified as nonaccrual | 0 | 0 |  |
ACL on investment securities held to maturity | 0 | 0 |  |
Accrued interest receivable |  |  | 3,600,000 |
Accrued interest write off on investment securities available for sale |  | 0 | 0 | 0
Accrued interest write off on investment securities held to maturity |  | 0 | $ 0 | $ 0
Held-to-maturity Securities |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Accrued interest receivable | 1,100,000 | 1,100,000 |  |
Available-for-sale Securities [Member] |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Accrued interest receivable | 3,500,000 | $ 3,500,000 |  |
AOCI attributable to parent |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |
Gain on transfer of investment securities available for sale to held to maturity | $ 1,300,000 |  |  |

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- Definition Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(4)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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