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v3.19.3.a.u2

Retirement Plan (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Retirement Benefits [Abstract] |  |  |
Non-elective annual employer contribution, percentage of participants' eligible earnings | 3.00% |  |
Pension expenses | $ 21.2 | $ 18.9 | $ 17.4

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- Definition Defined Contribution Plan, Non-elective Annual Employer Contribution, Percentage of Participants' Eligible Earnings + 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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