Income Taxes (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Dec. 31, 2017 |
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| Income Taxes [Abstract] | |||
| Effective tax rate | 33.00% | 42.00% | |
| Corporate tax rate | 21.00% | 35.00% | |
| Tax Cuts and Jobs Act of 2017, Provisoinal income tax benefit | $ 45.3 | ||
| X | ||||||||||
- Definition Amount of income tax expense (benefit) from effect of Tax Cuts and Jobs Act of 2017. No definition available.
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| X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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