Derivatives - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Jun. 30, 2012
Derivative [Line Items]
Foreign exchange losses due to revaluation of derivative instruments held		$ 0		$ 1,400,000
Number of interest rate swap contracts			1		1
Interest Rate Risk Management [Member]
Derivative [Line Items]
Amount expected to be reclassified from AOCI to earnings within the next 12 months			400,000
Notional amount of interest rate derivatives	19,700,000		19,700,000		20,300,000
Not designated as Hedging instrument [Member]
Derivative [Line Items]
Foreign contracts maturing within 12 months			362,200,000		154,800,000
Fair value of foreign currency derivatives not designated as hedges, asset					8,800,000
Fair value of foreign currency derivatives not designated as hedges, liability	2,100,000		2,100,000
Cash Flow Hedging [Member]
Derivative [Line Items]
Foreign contracts maturing within 12 months			487,500,000		638,300,000
Ineffectiveness recognized	0	0	0	0
Fair value of derivatives contracts			16,000,000		29,800,000
Amount expected to be reclassified from AOCI to earnings within the next 12 months			12,800,000
Recognized net gain (losses) related to the change in forward points	$ 200,000	$ 1,400,000	$ 1,600,000	$ (4,000,000)
Maximum [Member]
Derivative [Line Items]
Foreign exchange contracts maturity period, years			1