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Financial Instruments and Fair Value Measurements - Summary of Changes in Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Cumulative translation adjustment | $ 15,875 | $ 111,554
Total foreign currency translation gains, net | 60,080 | 4,770
Total unrealized losses on derivative contracts, net | (2,633) | (6,287)
Total change in other comprehensive income (loss) | 57,447 | (1,517)
Designated As Hedging Instrument [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Total derivative hedging instruments | (19,452) | 3,093
Designated As Hedging Instrument [Member] | Non derivative Net Investment Hedge [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Nonderivative net investment hedges | 63,657 | (109,877)
Designated As Hedging Instrument [Member] | Cash Flow Hedges [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Total derivative hedging instruments | 1,105 | (9,285)
Designated As Hedging Instrument [Member] | Our Share of Derivatives from Unconsolidated Co-Investment Ventures [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Total derivative hedging instruments | $ (3,738) | $ 2,998

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