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Employee Benefit Plans - Additional Information (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($) pension_plan | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined contribution plan expense | $ 6.8 | $ 6.4 | $ 6.1
Number of defined benefit pension plans | pension_plan | 4 |  |
Actuarial losses arising during period, net of tax | $ 0.7 | (0.7) | 5.6
Non-Qualified Supplemental Retirement Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actuarial losses arising during period, before tax | 0.1 |  |
Actuarial losses arising during period, net of tax | 0.1 |  |
Amortization of recognized actuarial loss | 0.1 |  |
Amortization of gains (losses), net of tax | 0.1 |  |
Foreign Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected future amortization of gain (loss) | 0.5 |  |
Amortization of recognized actuarial loss | $ 0.5 | $ 0.5 | $ 0.3

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- Definition Non-U.S. Defined Benefit Plans, Number of Plans + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 + 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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