Derivatives - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Derivative [Line Items]
Foreign exchange losses due to revaluation of derivative instruments held			$ 1,400,000
Number of interest rate swap contracts		1	1
Notional amount of interest rate derivatives	810,703,000	810,703,000	793,186,000
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Foreign contracts maturing within 12 months		330,900,000	154,800,000
Foreign contracts maturity period		October 2013	August 2012
Fair value of foreign currency derivatives not designated as hedges, assets			1,200,000	8,800,000
Interest Rate Risk Management [Member]
Derivative [Line Items]
Ineffectiveness recognized		100,000	100,000	100,000
Amount expected to be reclassified from AOCI to earnings within the next 3 & 12 months	200,000
Notional amount of interest rate derivatives	19,700,000	19,700,000	20,300,000
Derivatives maturity Date	Sep. 30, 2013
Cash Flow Hedging [Member]
Derivative [Line Items]
Foreign contracts maturing within 12 months		479,800,000	638,300,000
Foreign contracts maturity period		June 2014	June 2013
Ineffectiveness recognized		100,000	100,000	100,000
Fair value of derivatives contracts		11,600,000	29,800,000
Amount expected to be reclassified from AOCI to earnings within the next 3 & 12 months		9,500,000
Recognized net gain (losses) related to the change in forward points		$ 2,700,000	$ (4,300,000)	$ 1,200,000
Maximum [Member]
Derivative [Line Items]
Foreign exchange contracts maturity period, years		1