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Income Taxes, Valuation Allowance (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
Deferred Tax Assets Operating Loss Carryforwards Utilized or Expired [Member] |
Valuation Allowance [Line Items] |
Changes in valuation allowances for deferred tax assets | $ 10.5
Deferred Tax Assets Operating Loss Carryforwards Established or Continued [Member] |
Valuation Allowance [Line Items] |
Changes in valuation allowances for deferred tax assets | $ 7.4

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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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- Details
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