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Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 USD ($) Segment | Jan. 01, 2019 USD ($) | Dec. 31, 2018 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Number of global business platforms | Segment | 2 |  |
Operating lease right-of-use assets | $ 85,327 |  | $ 0
Operating lease liability | 97,014 |  |
Standby Letters of Credit |  |  |
Significant Accounting Policies [Line Items] |  |  |
Loss contingency, range of possible loss, portion not accrued | 7,300 |  |
Bank Guaranties |  |  |
Significant Accounting Policies [Line Items] |  |  |
Loss contingency, range of possible loss, portion not accrued | 3,600 |  |
Surety Bonds |  |  |
Significant Accounting Policies [Line Items] |  |  |
Loss contingency, range of possible loss, portion not accrued | $ 3,300 |  |
Accounting Standards Update 2016-02 |  |  |
Significant Accounting Policies [Line Items] |  |  |
Operating lease right-of-use assets |  | $ 90,500 |
Operating lease liability |  | $ 103,400 |

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