Recent Accounting Standards (Details) - USD ($) $ in Thousands			3 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Nov. 30, 2019	Nov. 30, 2018	Sep. 01, 2019	Aug. 31, 2019
Recently Adopted Accounting Pronouncements
Package of practical expedients			true
Operating lease liability			$ 9,219			$ 9,219
Operating lease liability, short-term			2,075
Operating Lease, Liability, Noncurrent			7,144
Operating Lease, Right-of-Use Asset			$ 9,776
Statutory tax rate (as a percent)	21.00%	35.00%	21.00%	21.00%
ASU 2016-02
Recently Adopted Accounting Pronouncements
Operating lease liability					$ 9,644
Operating lease liability, short-term					2,071
Operating Lease, Liability, Noncurrent					7,573
Operating Lease, Right-of-Use Asset					$ 10,200