Other Comprehensive Income Other Comprehensive Income, Text (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Other Comprehensive Income (Loss), Tax [Abstract]
Net investment hedge translation adjustments	$ (306)	$ 752	$ 388	$ (1,373)
Cash flow hedges	(262)	90	(379)	(46)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Plan Amendments, Tax Effect	0	0	(178)	0
Other income tax adjustments and currency translation	(412)	(21)	(469)	39
Income tax benefit (expense) related to items of other comprehensive income (loss)	(980)	821	(638)	(1,380)
Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance			(44,682)	(54,745)
Other Comprehensive Income (Loss), before Reclassification			(3,340)	(8,509)
Amounts reclassified from accumulated other comprehensive income			(124)	(85)
Ending balance	(48,146)	(63,339)	$ (48,146)	(63,339)
Document Fiscal Year Focus			2018
Cash flow hedges
Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance			$ 109	(857)
Other Comprehensive Income (Loss), before Reclassification			(124)	563
Amounts reclassified from accumulated other comprehensive income			310	(323)
Ending balance	295	29	295	29
Unamortized gain on post-retirement plans
Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance			2,620	2,236
Other Comprehensive Income (Loss), before Reclassification			414	72
Amounts reclassified from accumulated other comprehensive income			(434)	408
Ending balance	2,600	1,900	2,600	1,900
Foreign currency translation adjustments
Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance			(47,411)	(56,124)
Other Comprehensive Income (Loss), before Reclassification			(3,630)	(9,144)
Amounts reclassified from accumulated other comprehensive income			0	0
Ending balance	$ (51,041)	$ (65,268)	$ (51,041)	$ (65,268)