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Income Taxes - Change in Valuation Allowance (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Valuation Allowance [Line Items] |  |  |  |
Increase (decrease) in deferred tax asset valuation allowance | $ 26,700 |  |  |
Domestic Tax Authority [Member] |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Increase (decrease) in deferred tax asset valuation allowance |  | $ 65,900 | $ (500) | $ 0
Change in valuation allowance |  | (65,368) | 556 | 46
State and Local Jurisdiction [Member] |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Increase (decrease) in deferred tax asset valuation allowance |  | 19,400 | (1,300) | (400)
Change in valuation allowance |  | $ (19,293) | $ (44) | $ (88)

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + 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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