CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ 23,928	$ 27,188
Other comprehensive income:
Foreign currency translation adjustments	16,535	18,493
Net investment hedge translation adjustments	(4,713)	(5,301)
Long-term intercompany loan translation adjustments	(173)	(1,594)
Cash flow hedges:
Net (loss) gain recognized in other comprehensive income	(15)	(557)
Reclassification adjustment for (gains) losses included in net income	(90)	(467)
Total cash flow hedges	(105)	(1,024)
Pension and other post-retirement benefits:
Actuarial gain amortization	(66)	(11)
Prior service credit amortization	(51)	(51)
Total pension and other post-retirement benefits	(117)	(62)
Other comprehensive income (loss), before tax	11,427	10,512
Income tax benefit (expense) related to items of other comprehensive income (loss)	2,642	2,255
Other comprehensive income (loss), net of tax	14,069	12,767
Comprehensive income (loss)	$ 37,997	$ 39,955