Leases (Supplemental Balance Sheet Information) (Details) - USD ($) $ in Thousands		Feb. 29, 2020		Aug. 31, 2019
Leases [Abstract]
Operating lease assets		$ 60,064
Finance lease assets	[1]	4,280		$ 2,958
Total leased assets		64,344		2,958
Current operating lease liabilities		21,587
Current finance lease liabilities		1,244		765
Noncurrent operating lease liabilities		38,119
Noncurrent finance lease liabilities		3,104		2,206
Total lease liabilities		$ 64,054	[2]	2,971
Weighted average remaining lease term (years), Operating leases		4 years
Weighted average remaining lease term (years), Finance leases		3 years 4 months 24 days
Weighted average discount rate, Operating leases		3.50%
Weighted average discount rate, Finance leases		2.60%
Finance lease right of use assets, Accumulated amortization		$ 793		$ 1,398

[1] Finance lease assets are net of accumulated amortization of $793 and $1,398 as of February 29, 2020 and August 31, 2019

[2] Includes the current portion of $21,587 for operating leases and $1,244 for finance leases