Derivatives - Schedule of Outstanding Foreign Exchange Contracts, Primarily Forward Contracts (Detail) - USD ($)	Sep. 30, 2015	Jun. 30, 2015
Derivative [Line Items]
Fair Value Asset/(Liability)	$ 193,764,000	$ 195,342,000
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Gross Notional Value	2,397,170,000	1,884,158,000
Fair Value Asset/(Liability)	193,764,000	195,342,000
Foreign Exchange Contracts [Member] | U.S. Dollar/Euro [Member]
Derivative [Line Items]
Gross Notional Value	1,889,735,000	1,479,685,000
Fair Value Asset/(Liability)	196,781,000	208,532,000
Foreign Exchange Contracts [Member] | Indian Rupee/U.S. Dollar [Member]
Derivative [Line Items]
Gross Notional Value	222,425,000	205,150,000
Fair Value Asset/(Liability)	(3,185,000)	(935,000)
Foreign Exchange Contracts [Member] | Euro/U.S. Dollar [Member]
Derivative [Line Items]
Gross Notional Value	153,944,000	153,549,000
Fair Value Asset/(Liability)	(4,232,000)	(15,994,000)
Foreign Exchange Contracts [Member] | JPY/Euro [Member]
Derivative [Line Items]
Gross Notional Value	24,025,000	0
Fair Value Asset/(Liability)	393,000	0
Foreign Exchange Contracts [Member] | CNY/U.S. Dollar [Member]
Derivative [Line Items]
Gross Notional Value	41,300,000	0
Fair Value Asset/(Liability)	20,000	0
Foreign Exchange Contracts [Member] | Russian Rubles/U.S. Dollar [Member]
Derivative [Line Items]
Gross Notional Value	3,619,000	0
Fair Value Asset/(Liability)	25,000	0
Foreign Exchange Contracts [Member] | Swiss Franc/Euro [Member]
Derivative [Line Items]
Gross Notional Value	30,829,000	32,050,000
Fair Value Asset/(Liability)	2,864,000	4,262,000
Foreign Exchange Contracts [Member] | U.S. Dollar/Brazilian Real [Member]
Derivative [Line Items]
Gross Notional Value	18,246,000	6,148,000
Fair Value Asset/(Liability)	1,123,000	318,000
Foreign Exchange Contracts [Member] | Euro/Russian Rubles [Member]
Derivative [Line Items]
Gross Notional Value	5,047,000	5,963,000
Fair Value Asset/(Liability)	36,000	(865,000)
Foreign Exchange Contracts [Member] | U.S. Dollar/Russian Rubles [Member]
Derivative [Line Items]
Gross Notional Value	8,000,000	1,613,000
Fair Value Asset/(Liability)	$ (61,000)	$ 24,000