Derivative Instruments - Additional Information (Detail) In Millions, unless otherwise specified			3 Months Ended		3 Months Ended
	Mar. 31, 2015 Foreign Currency Forward Exchange Contracts USD ($)	Jun. 30, 2014 Foreign Currency Forward Exchange Contracts USD ($)	Mar. 31, 2015 Minimum	Mar. 31, 2015 Minimum Foreign Currency Forward Exchange Contracts JPY (¥)	Mar. 31, 2015 Maximum	Mar. 31, 2015 Maximum Foreign Currency Forward Exchange Contracts JPY (¥)
Derivative [Line Items]
Foreign currency forward exchange contracts, notional amount	$ 9.6	$ 7.4		¥ 250.0		¥ 300.0
Foreign currency forward exchange contracts, expiration date			Apr. 01, 2015		Jul. 31, 2015