Summary of Significant Accounting Policies Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	$ 99	$ 876	$ (1,154)	$ (321)
Adjustment for Long-term Intercompany Transactions, Tax Benefit (Expense)	(650)	(2,508)	(1,193)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	1,853	978	2,188	1,357
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	54,111	57,557	112,864	49,869
Accumulated other comprehensive income	56,063	59,411	113,898	50,905
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(777)	2,030	(833)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	875	(1,210)	831
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(3,446)	(55,307)	62,995
Other Comprehensive Income (Loss), Net of Tax	$ (3,348)	$ (54,487)	$ 62,993