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Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Income Taxes |  |
Retained earnings for which no deferred income tax liability had been recognized | $ 17.5 | $ 17.5
Unrecorded deferred income tax liability | 3.9 | $ 3.9
Tax obligation under tax examinations | $ 4.0 |

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- Definition Estimated amount of loss resulting from an adverse tax position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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