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Employee Benefit Plans - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Employees maximum 401(k) contribution, percentage | 75.00% |  |
Defined contribution plan, contribution | $ 6,400,000 | $ 5,300,000 | $ 5,500,000
Employer 401(k) matching contribution to employee, maximum amount | $ 5,000 |  |
Defined contribution plan, employer matching percentage on every deferred dollar | 100.00% |  |
EMEA Group |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, contribution | $ 1,600,000 | $ 1,600,000 | $ 1,700,000
Maximum [Member] |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Employer 401(k) matching contribution to employee percentage | 4.00% |  |
Employees under Age 50 |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Employees maximum 401(k) contribution, amount | $ 18,500 |  |
Employees Aged 50 or Older |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Employees maximum 401(k) contribution, amount | $ 24,500 |  |
Employed at December 1, 2000 | EMEA Group |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, employer contribution percentage of eligible compensation minimum | 8.50% |  |
Employees aged over 55 years | EMEA Group |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, employer contribution percentage of eligible compensation maximum | 15.50% |  |
Employed subsequent to December 1, 2000 | Maximum [Member] | EMEA Group |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, employer contribution percentage of eligible compensation | 10.00% |  |
Employed subsequent to December 1, 2000 | Minimum [Member] | EMEA Group |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, employer contribution percentage of eligible compensation | 6.00% |  |
Second Eligible Participant Contributions [Member] |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Employer 401(k) matching contribution to employee percentage | 4.00% |  |
Defined contribution plan, employer matching percentage on every deferred dollar | 50.00% |  |

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- Definition Company's maximum contribution of eligible compensation for employees aged over 55 years and employed at December 31, 2000. + References No definition available. + Details
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- Definition Company's contribution of eligible compensation for those employed after December 31, 2000. + References No definition available. + Details
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- Definition Company's contribution of eligible compensation for employees employed at December 31, 2000. + References No definition available. + Details
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- Definition Defined contribution plan employers contribution maximum. + References No definition available. + Details
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- Definition Schedule Of Defined Contribution Plans Disclosures [Line Items] + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 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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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Maximum amount the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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