Income Taxes (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Dec. 31, 2017 |
|
| Income Tax Disclosure [Abstract] | |||
| Provision (benefit) for income taxes, as a percentage of income before income taxes | 79.50% | 44.00% | |
| Statutory U.S. federal income tax rate | 21.00% | 35.00% | |
| Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings, income tax expense | $ 0 | ||
| Liability related to unrecognized tax benefits | $ 4,715,000 | $ 4,633,000 | |
| X | ||||||||||
- Definition Tax Cuts and Jobs Act of 2017, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense No definition available.
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- 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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- 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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| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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