Revenue from Contracts with Customers Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 528,660	$ 493,292
Revenue, Remaining Performance Obligation, Amount	3,400
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	396,457	361,359
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 132,203	$ 131,933