Financial Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017
Designated as Hedging [Member] | Cash Flow Hedges [Member] | Maximum [Member]
Derivative [Line Items]
Maturities of foreign currency derivative contracts	18 months
Designated as Hedging [Member] | Cash Flow Hedges [Member] | Minimum [Member]
Derivative [Line Items]
Maturities of foreign currency derivative contracts	1 month
Not Designated as Hedging [Member]
Derivative [Line Items]
Maturities of foreign currency derivative contracts	1 month
Fair Value, Measurements [Member] | Maximum [Member]
Derivative [Line Items]
Accumulated other comprehensive income realization period	18 months
Fair Value, Measurements [Member] | Minimum [Member]
Derivative [Line Items]
Accumulated other comprehensive income realization period	12 months