Income Per Share - Schedule of Computation of Basic Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Feb. 27, 2021	Nov. 28, 2020	Feb. 29, 2020	Nov. 30, 2019	Feb. 27, 2021	Feb. 29, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income available to shareholders	$ 32,585	$ 41,896	$ 34,680	$ 48,242	$ 74,481	$ 82,922
Allocation of net income for Basic:
Common stock	$ 32,585		$ 34,680		$ 74,481	$ 82,922
Weighted average number of shares for Basic:
Common stock (in shares)	18,866		18,936		18,878	18,943
Common Stock
Allocation of net income for Basic:
Common stock	$ 27,349		$ 29,129		$ 62,520	$ 69,654
Weighted average number of shares for Basic:
Common stock (in shares)	15,223		15,293		15,235	15,300
Income per share for Basic:
Common stock (in dollars per share)	$ 1.80		$ 1.90		$ 4.10	$ 4.55
Class B Common Stock
Allocation of net income for Basic:
Common stock	$ 5,236		$ 5,551		$ 11,961	$ 13,268
Weighted average number of shares for Basic:
Common stock (in shares)	3,643		3,643		3,643	3,643
Income per share for Basic:
Common stock (in dollars per share)	$ 1.44		$ 1.52		$ 3.28	$ 3.64