CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 15,290	$ 11,584	$ 33,993	$ 25,168
Foreign currency translation adjustments:
Net loss recognized in other comprehensive loss	(7,463)	(46,816)	(13,946)	(71,120)
Reclassification adjustment for gains included in net earnings	0	0	0	(34,697)
Total foreign currency translation adjustments	(7,463)	(46,816)	(13,946)	(105,817)
Net investment hedge translation adjustments	2,671	12,276	3,542	20,427
Long-term intercompany loan translation adjustments:
Net (loss) gain recognized in other comprehensive loss	(2,396)	2,232	(3,820)	882
Reclassification adjustment for gains included in net earnings	0	0	0	(393)
Total intercompany loan translation adjustments	(2,396)	2,232	(3,820)	489
Cash flow hedges:
Net (loss) gain recognized in other comprehensive loss	(302)	1,239	(562)	1,841
Reclassification adjustment for gains included in net earnings	115	(116)	(342)	(95)
Total cash flow hedges	(187)	1,123	(904)	1,746
Pension and other post-retirement benefits:
Actuarial gain amortization	(161)	(214)	(323)	(428)
Prior service credit amortization	(414)	(81)	(1,035)	(162)
Total pension and other post-retirement benefits	(575)	(295)	(1,358)	(590)
Other comprehensive loss, before tax	(7,950)	(31,480)	(16,486)	(83,745)
Income tax (expense) benefit related to items of other comprehensive income	(979)	(4,654)	(835)	(7,980)
Other comprehensive loss, net of tax	(8,929)	(36,134)	(17,321)	(91,725)
Comprehensive income (loss)	$ 6,361	$ (24,550)	$ 16,672	$ (66,557)