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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Effective income tax rate | 33.00% |  | 31.00% |  | 318.00% | 23.00% |
Valuation allowances against deferred tax assets | $ 11,600 |  |  |  | $ 11,600 |  | $ 7,200
Net deferred tax liability | 23,400 |  |  |  | 23,400 |  | $ 33,300
Income tax expense (benefit) | $ (2,638) |  | $ (1,311) |  | $ (4,006) | $ (3,858) |
Cares Act [Member] |  |  |  |  |  |  |
Reduction to income taxes payable |  |  |  | $ (1,300) |  |  |
Reduction to deferred tax assets |  |  |  | $ (1,300) |  |  |
Correction In Calculation Of Valuation Allowance And Uncertain Tax Position [Member] |  |  |  |  |  |  |
Income tax expense (benefit) |  | $ (2,100) |  |  |  |  |

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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 http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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