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Income Taxes Income Tax (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Valuation Allowance [Line Items] |  |  |  |
Provision for income taxes | $ 25,160 | $ 21,572 | $ 84,265 | $ 48,401
Effective Income Tax Rate Reconciliation, Percent | 21.70% | 22.70% | 22.90% | 23.20%
Effective Income Tax Rate Reconciliation, Tax Credit, Amount | $ 2,100 |  |  |

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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=121826272&loc=d3e32687-109319 + Details
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