CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 4,273	$ 25,297	$ 30,109	$ 47,850
Document Fiscal Year Focus			2018
Foreign currency translation adjustments:
Foreign currency translation adjustments	17,846	(2,292)	$ 12,461	(16,546)
Net investment hedge and long-term intercompany loan translation adjustments	(2,005)	1,984	(3,177)	5,169
Cash flow hedges:
Net loss recognized in other comprehensive income (loss)	(304)	(403)	(537)	(106)
Reclassification adjustment for gains included in net earnings	158	10	182	415
Total cash flow hedges	(146)	(393)	(355)	309
Pension and other post-retirement benefits:
Actuarial gain amortization	592	72	592	72
Other Comprehensive Income Amortization Of Defined Benefit Plan Actuarial Loss (Gain) Recognized In Net Periodic Benefit Cost Before Tax	(141)	(136)	(271)	(272)
Total pension and other post-retirement benefits	451	(64)	321	(200)
Other comprehensive income (loss), before tax	16,146	(765)	9,250	(11,268)
Income tax (expense) benefit related to items of other comprehensive income	827	(535)	342	(2,201)
Other comprehensive income (loss), net of tax	16,973	(1,300)	9,592	(13,469)
Comprehensive income	$ 21,246	$ 23,997	$ 39,701	$ 34,381