Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements (Detail) $ in Thousands	6 Months Ended
Jun. 30, 2019 USD ($) interest_rate_swaps
U.S. Dollar-denominated interest rate swaps \| LIBOR
Derivative [Line Items]
Principal Amount	$ 1,011,178
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ (44,855)
Weighted-Average Remaining Term (Years)	3 years 7 months 6 days
Derivative, Fixed Interest Rate	3.00%
Euro-denominated interest rate swaps \| EURIBOR
Derivative [Line Items]
Principal Amount	$ 81,059
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ (9,912)
Weighted-Average Remaining Term (Years)	4 years 2 months 1 day
Derivative, Fixed Interest Rate	3.80%
Interest rate swap agreements
Derivative [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ (54,767)
Derivative, Number of Instruments Held \| interest_rate_swaps	2
Minimum [Member] \| Interest rate swap agreements
Derivative [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.30%
Maximum \| Interest rate swap agreements
Derivative [Line Items]
Debt Instrument, Basis Spread on Variable Rate	3.95%

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

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- Definition

Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

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- Definition

Fair value as of the balance sheet date of all derivatives not designated as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958

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