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Income Taxes - Narrative (Details) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
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Income Tax Disclosure [Abstract] |  |
Deferred tax assets (liabilities) related to net unrealized holdings losses/(gains) in the available-for-sale securities portfolio | $ 58,600,000 | $ 4,700,000
Deferred tax assets related to employee benefit plans | 9,800,000 | 13,400,000
Valuation allowance | $ 0 | $ 0

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- Definition The value of employee benefit plans excluded from the deferred tax asset calculation as of the balance sheet date. + References No definition available. + Details
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- Definition The value of net unrealized holding gains in available for sale securities excluded from deferred tax liabilities calculation as of the balance sheet date. + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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