Stock-Based Compensation - Expense and Related Tax Effects (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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Share-based Payment Arrangement [Abstract] | |||
Stock-based compensation expense | $ 2.7 | $ 1.2 | $ 4.7 |
Income tax benefit | $ 0.0 | $ 0.0 | $ 1.1 |
X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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X | ||||||||||
- References No definition available.
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X | ||||||||||
- Definition Amount of tax benefit for recognition of expense of award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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