CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 25,297	$ 15,290	$ 47,850	$ 33,993
Document Fiscal Year Focus			2017
Foreign currency translation adjustments:
Foreign currency translation adjustments	(2,292)	(7,463)	$ (16,546)	(13,946)
Net investment hedge translation adjustments	1,426	2,671	5,448	3,542
Long-term intercompany loan translation adjustments:
Long-term intercompany loan translation adjustments	558	(2,396)	(279)	(3,820)
Cash flow hedges:
Net loss recognized in other comprehensive loss	(403)	(302)	(106)	(562)
Reclassification adjustment for gains included in net earnings	10	115	415	(342)
Total cash flow hedges	(393)	(187)	309	(904)
Pension and other post-retirement benefits:
Actuarial gain amortization	72	0	72	0
Other Comprehensive Income Amortization Of Defined Benefit Plan Actuarial Loss (Gain) Recognized In Net Periodic Benefit Cost Before Tax	(136)	(161)	(272)	(323)
Prior service credit amortization	0	(414)	0	(1,035)
Total pension and other post-retirement benefits	(64)	(575)	(200)	(1,358)
Other comprehensive loss, before tax	(765)	(7,950)	(11,268)	(16,486)
Income tax (expense) benefit related to items of other comprehensive income	(535)	(979)	(2,201)	(835)
Other comprehensive loss, net of tax	(1,300)	(8,929)	(13,469)	(17,321)
Comprehensive income	$ 23,997	$ 6,361	$ 34,381	$ 16,672