Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Increase (Decrease) In Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	$ 680,436	$ 701,296
Total other comprehensive (loss) income, net of tax	(21)	238
Ending balance	688,548	685,036
Foreign Currency Translation Adjustments
Increase (Decrease) In Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	(34,184)	(35,689)
Other comprehensive income (loss) before reclassifications	239	211
Income tax benefit (expense)	0	0
Other comprehensive income (loss) before reclassifications, net of tax	239	211
Amounts reclassified from accumulated other comprehensive loss	0	0
Income tax benefit	0	0
Amounts reclassified from accumulated other comprehensive loss, net of tax	0	0
Total other comprehensive (loss) income, net of tax	239	211
Ending balance	(33,945)	(35,478)
Pension Obligations, net
Increase (Decrease) In Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	(2,687)	(3,074)
Other comprehensive income (loss) before reclassifications	(385)	(17)
Income tax benefit (expense)	87	4
Other comprehensive income (loss) before reclassifications, net of tax	(298)	(13)
Amounts reclassified from accumulated other comprehensive loss	49	52
Income tax benefit	(11)	(12)
Amounts reclassified from accumulated other comprehensive loss, net of tax	38	40
Total other comprehensive (loss) income, net of tax	(260)	27
Ending balance	(2,947)	(3,047)
Accumulated Other Comprehensive Loss
Increase (Decrease) In Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	(36,871)	(38,763)
Other comprehensive income (loss) before reclassifications	(146)	194
Income tax benefit (expense)	87	4
Other comprehensive income (loss) before reclassifications, net of tax	(59)	198
Amounts reclassified from accumulated other comprehensive loss	49	52
Income tax benefit	(11)	(12)
Amounts reclassified from accumulated other comprehensive loss, net of tax	38	40
Total other comprehensive (loss) income, net of tax	(21)	238
Ending balance	$ (36,892)	$ (38,525)