Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income, Beginning Balance	$ 64,156	$ 56,063
Other comprehensive (loss) income before reclassification	(70,033)	4,626
Amounts reclassified from accumulated other comprehensive income	39,157	(3,467)
Accumulated other comprehensive (loss) income, Ending Balance	(45,034)	64,156
Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income, Beginning Balance	(12)	99
Other comprehensive (loss) income before reclassification	829	(21)
Amounts reclassified from accumulated other comprehensive income	808	90
Accumulated other comprehensive (loss) income, Ending Balance	9	(12)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income, Beginning Balance	59,314	54,111
Other comprehensive (loss) income before reclassification	(73,098)	1,334
Amounts reclassified from accumulated other comprehensive income	34,697	(3,869)
Accumulated other comprehensive (loss) income, Ending Balance	(48,481)	59,314
Other Postretirement Benefit Plan, Defined Benefit [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income, Beginning Balance	4,854	1,853
Other comprehensive (loss) income before reclassification	2,236	3,313
Amounts reclassified from accumulated other comprehensive income	3,652	312
Accumulated other comprehensive (loss) income, Ending Balance	$ 3,438	$ 4,854