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Employee Benefit Plans (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Defined Contribution Plan Disclosure [Line Items] |  |  |
Minimum age for participation (in years) | 18 years |  |
Minimum time at the company for participation (in days) | 90 days |  |
Total paid into 401(k) | $ 2,400 | $ 2,300 | $ 2,000
Non-US |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Total paid into 401(k) | $ 2,300 | $ 1,100 | $ 893
Non-US | Minimum |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer matching, percent of gross pay | 2.00% |  |
Non-US | Maximum |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer matching, percent of gross pay | 32.00% |  |
Non-US | Management | Minimum |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer matching, percent of gross pay | 2.00% |  |
Non-US | Management | Maximum |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer matching, percent of gross pay | 32.00% |  |

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- Definition US Full Time Employees Minimum Years Of Age + References No definition available. + Details
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- Definition The Plan has a 90 day minimum service requirement + References No definition available. + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + 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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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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