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Financial Instruments - Additional Information (Detail) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) swap | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) swap
Derivative [Line Items] |  |  |  |
Derivative losses included in AOCI |  |  | $ 5,700,000 |
Net investment hedge ineffectiveness |  |  | 0 |
Cash flow hedge ineffectiveness | $ 0 |  | 0 |
Derivative, Gain (Loss) on Derivative, Net | (3,932,000) | $ (9,273,000) | $ (3,006,000) | $ (12,888,000)
Foreign currency contract |  |  |  |
Derivative [Line Items] |  |  |  |
Term of derivative |  |  | 12 months |
Interest rate swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Number of instruments terminated (swap) | swap |  | 2 |  | 2
Deal Contingent Swaps | Interest expense | Interest rate swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | $ 0 | $ (24,937,000) | $ 0 | $ (24,937,000)

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