Accumulated Other Comprehensive Loss, Tax (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	$ 47	$ (5)	$ (1)	$ 30
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	6	93	246	93
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(1,304)	(130)	(1,297)	46
Income tax (expense) benefit related to items of other comprehensive income	$ (1,251)	$ (42)	$ (1,052)	$ 169