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Financial Instruments - Additional Information (Detail) $ in Thousands, € in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
May 18, 2017 EUR (€) | Dec. 31, 2018 USD ($) | Mar. 31, 2017 EUR (€) Agreement | Mar. 31, 2017 USD ($) Agreement | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2019 swap
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Gain on deal contingent derivatives |  |  |  |  | $ 0 | $ 12,505 | $ 0 |
Derivative gains included in AOCI |  |  |  |  | 4,700 |  |  |
Total fair value, derivative assets |  | $ 7,229 |  |  |  | 7,229 |  |
Proceeds from unwinding of cross currency swap derivative instruments |  |  |  |  | 25,900 | 0 | $ 0 |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  | 7,415 |  |  |
Forward Currency Contracts [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivative instruments outstanding |  | 585,581 |  |  | 473,600 | 585,581 |  |
Currency Swap [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivative instruments outstanding |  | 600,000 |  |  | 600,000 | 600,000 |  |
Interest Rate Swap [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Loss incurred on termination of interest rate swaps |  |  | € 2.9 | $ 3,200 |  |  |  |
Gain on deal contingent derivatives | € | € 5.3 |  |  |  |  |  |  |
Number of interest rate derivatives held | Agreement |  |  | 2 | 2 |  |  |  |
Total fair value, derivative assets |  | 1,087 |  |  |  | 1,087 |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  | 4,187 |  |  |
Foreign Currency Contract And Interest Rate Swap [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivative instruments outstanding |  |  |  |  | 1,900,000 |  |  |
Fair Value of Derivatives Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Total fair value, derivative assets |  | 2,020 |  |  |  | 2,020 |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  | 2,431 |  |  |
Fair Value of Derivatives Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Total fair value, derivative assets |  | 0 |  |  |  | 0 |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  | 0 |  |  |
Fair Value of Derivatives Not Designated as Hedging Instrument [Member] | Foreign Currency Contracts [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  |  |  |  | 557 | 14,505 |  |
Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Total fair value, derivative assets |  | 5,209 |  |  |  | 5,209 |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  | 4,984 |  |  |
Designated as Hedging Instrument [Member] | Currency Swap [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Interest Income (Expense), Net |  | 7,700 |  |  |  |  |  |
Number of Foreign Currency Derivatives Held | swap |  |  |  |  |  |  |  | 4
Proceeds from unwinding of cross currency swap derivative instruments |  | 33,600 |  |  |  |  |  |
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Total fair value, derivative assets |  | $ 1,087 |  |  |  | 1,087 |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  | 4,187 |  |  |
Other Income Expense Net [Member] | Deal Contingent Swaps [Member] | Fair Value of Derivatives Not Designated as Hedging Instrument [Member] | Foreign Currency Contracts [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  |  |  |  | 0 | 12,154 |  |
Interest Expense [Member] | Deal Contingent Swaps [Member] | Fair Value of Derivatives Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  |  |  |  | $ 0 | $ 352 |  |

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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=118948506&loc=SL51823488-111719 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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- Definition The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
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