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Stock-Based Compensation (Unrecognized Compensation Expense) (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2021 USD ($)
Stock options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Unrecognized Compensation Expense | $ 4.6
Weighted Average Years Expense To Be Recognized Over | 2 years 2 months 12 days
Restricted stock units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Unrecognized Compensation Expense | $ 5.1
Weighted Average Years Expense To Be Recognized Over | 1 year 9 months 18 days
Performance stock units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Unrecognized Compensation Expense | $ 14.0
Weighted Average Years Expense To Be Recognized Over | 1 year 10 months 24 days

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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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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