Derivatives - Additional Information (Detail)	1 Months Ended	9 Months Ended
	May. 31, 2015 USD ($)	Sep. 30, 2015 USD ($) Derivative	Jun. 03, 2015 USD ($) Agreement	Jun. 09, 2011 Agreement
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of foreign exchange forward contracts | Agreement			7	6
Notional amount			$ 440,000,000
Payment to terminate hedge accounting	$ 12,400,000
Interest rate cash flow hedge loss to be reclassified during next nine months, net		$ (6,200,000)
Interest swaps accrual beginning date		Jun. 30, 2016
Derivative fixed interest rate		2.10%
Interest rate cash flow hedge loss to be reclassified during next 12 months, net		$ (1,900,000)
Senior Notes [Member] | Variable Rate Debt [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate swaps effectively converted percent		50.00%
Senior Notes [Member] | Fixed Rate Debt [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate swaps effectively converted percent		50.00%
Accrued Interest [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Payment to terminate hedge accounting	$ 1,400,000
Foreign Exchange Forward Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of foreign exchange forward contracts | Derivative		15
Notional amount		$ 116,100,000
Expiration description of hedge instruments		2015 and the first six months of 2016
Six Interest Rate Swaps [Member] | Minimum [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate swaps expiry date		Sep. 30, 2013
Six Interest Rate Swaps [Member] | Maximum [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate swaps expiry date		Mar. 31, 2016
Seven Interest Rate Swaps [Member] | Minimum [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate swaps expiry date		Mar. 31, 2017
Seven Interest Rate Swaps [Member] | Maximum [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate swaps expiry date		Mar. 31, 2020