Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income (Loss)(Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income before reclassification	$ 4,626	$ (2,768)
Amounts reclassified from accumulated other comprehensive income	3,467	(580)
Accumulated Other Comprehensive Income (Loss), Net of Tax	64,156	56,063	59,411	113,898
Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income before reclassification	(21)	(425)
Amounts reclassified from accumulated other comprehensive income	(90)	(352)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(12)	99	876
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income before reclassification	1,334	(3,446)
Amounts reclassified from accumulated other comprehensive income	3,869	0
Accumulated Other Comprehensive Income (Loss), Net of Tax	59,314	54,111	57,557
Other Postretirement Benefit Plan, Defined Benefit [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income before reclassification	3,313	1,103
Amounts reclassified from accumulated other comprehensive income	(312)	(228)
Accumulated Other Comprehensive Income (Loss), Net of Tax	4,854	1,853	978
Other Postretirement Benefit Plan, Defined Benefit [Member] | SG&A [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive income	0
Other Postretirement Benefit Plan, Defined Benefit [Member] | Gain Loss on Divestiture [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive income	$ 0