Fair Value Measurements - Fair Value Hierarchy for Assets and Liabilities Measured on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Fair Value, Inputs, Level 1 [Member]	Jun. 30, 2014 Fair Value, Inputs, Level 1 [Member]	Sep. 30, 2014 Fair Value, Inputs, Level 2 [Member]	Jun. 30, 2014 Fair Value, Inputs, Level 2 [Member]	Sep. 30, 2014 Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2014 Fair Value, Inputs, Level 3 [Member]
Assets/(Liabilities)
Available-for-sale securities			$ 2,540	$ 2,472	$ 0	$ 0	$ 0	$ 0
Foreign exchange contracts			0	0	79,697	(21,283)	0	0
Pension assets			5,056	6,641	0	0	0	0
Contingent consideration			0	0	0	0	(8,194)	(7,328)
Net asset/(liability)			7,596	9,113	79,697	(21,283)	(8,194)	(7,328)
Contingent Consideration	$ (866)	$ 0