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Income Taxes Income Taxes Tax Cuts and Jobs Act (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Income Tax Disclosure [Abstract] |  |
Provisional income tax benefit | $ 2,800 |
Pre-tax loss carryforwards | 32,100 |
Operating loss carryforwards, subject to expiration | 1,100 |
Deferred tax asset valuation allowance | 11,114 | $ 6,868
Increase (decrease) in the valuation allowance | 4,200 | $ (700)
Mandatory deemed repatriation of foreign earnings | 3,800 |
Provisional liability | $ 73,300 |

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- Definition Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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