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. 23, 2019	Nov. 24, 2018	Feb. 24, 2018	Nov. 25, 2017	Feb. 23, 2019	Feb. 24, 2018
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income available to shareholders	$ 47,606	$ 38,320	$ 58,378	$ 34,206	$ 85,926	$ 92,584
Allocation of net income for Basic:
Common stock	$ 47,606		$ 58,378		$ 85,926	$ 92,584
Weighted average number of shares for Basic:
Common stock (in shares)	19,138		20,297		19,140	20,287
Common Stock
Allocation of net income for Basic:
Common stock	$ 39,923		$ 46,744		$ 72,061	$ 74,126
Weighted average number of shares for Basic:
Common stock (in shares)	15,428		15,481		15,430	15,471
Income per share for Basic:
Common stock (in dollars per share)	$ 2.59		$ 3.02		$ 4.67	$ 4.79
Class B Common Stock
Allocation of net income for Basic:
Common stock	$ 7,683		$ 11,634		$ 13,865	$ 18,458
Weighted average number of shares for Basic:
Common stock (in shares)	3,710		4,816		3,710	4,816
Income per share for Basic:
Common stock (in dollars per share)	$ 2.07		$ 2.42		$ 3.74	$ 3.83