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Income Taxes (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Taxes |  |  |  |
Federal corporate income tax rate (as a percent) |  | 18.21% | 19.18% | 13.47%
Income tax benefit attributable to Tax Act | $ 343,000 |  |  |
Income tax benefit related additional tax planning initiatives | 143,000 |  |  |
Income tax benefit attributable to the pension contribution | 306,000 |  |  |
Income tax benefit attributable to accounting method changes on tax return | $ 180,000 |  |  |

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- Definition Amount of income tax expense (benefit) from the effects of other tax planning initiatives. + References No definition available. + Details
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- Definition The income tax expense (benefit) related to the pension contribution. + References No definition available. + Details
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- Definition The income tax expense (benefit) related to various accounting method changes made on the Company's prior tax return. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of income tax expense (benefit) from effect of Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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