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Income Taxes - Additional Information (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Taxes [Line Items] |  |  |
Three-year cumulative pretax income | $ 658,200,000 |  |
Increase in valuation allowance | 46,800,000 |  |
Tax benefit associated with net operating loss carryforwards | 78,300,000 |  |
Tax reserves, interest and penalties related to current year tax positions | 0 |  |
Tax reserves, interest and penalties related to prior year tax positions | 1,900,000 |  |
Reversal of previously recorded tax reserves and accrued interest for tax positions settled and/or closed | 1,000,000.0 |  |
Unrecognized tax benefits | 38,200,000 | $ 37,200,000 |
Net tax expense in connection with uncertain tax positions | 900,000 |  |
Tax positions that, if reversed, would affect the effective tax rate | 30,200,000 | 29,400,000 |
Interest and penalties recognized, net of deferred taxes | 500,000 | 100,000 | $ 500,000
Reductions in previously accrued interest and penalties | 100,000 | 0 |
Prepaid income taxes | 52,700,000 | 22,200,000 |
Domestic |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards | 148,100,000 | $ 120,300,000 |
State |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards | 1,332,000,000.0 |  |
Net operating loss carryforwards, valuation allowance | $ 60,200,000 |  |

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- Definition The cumulative pretax income (loss) position during the three most recent reporting years. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 + Details
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