Other Comprehensive Income Other Comprehensive Income, Tax - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Other Comprehensive Income, Tax [Abstract]
Cash flow hedges	$ 283	$ 55	$ (669)
Pension and other post-retirement benefits	229	164	(64)
Other income tax adjustments and currency translation	(337)	(972)	(567)
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle	0	0	1,869
Income tax benefit (expense) related to items of other comprehensive income (loss)	$ 175	$ (753)	$ 569