Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		1 Months Ended	3 Months Ended
	Dec. 18, 2018	Jan. 03, 2019	Dec. 01, 2018	Sep. 01, 2018	Dec. 02, 2017
Components Of Shareholders Equity [Line Items]
Cash dividends paid per common share			$ 0.63		$ 0.48
Cash dividends paid			$ 34,858		$ 27,087
Repurchase and retirement of common stock, Shares			238
Purchase of treasury stock			$ 3,200
Cost of repurchase, per share				$ 82.71
Shares repurchased by the company for associates' tax withholding liability associated with share-based compensation			40
Maximum number of shares that can be repurchased			1,430
Treasury stock reissued to fund plan. shares			13
Subsequent Event [Member]
Components Of Shareholders Equity [Line Items]
Dividends declared date	Dec. 18, 2018
Dividends payable per share	$ 0.63
Dividend payable date	Jan. 22, 2019
Dividends record date	Jan. 08, 2019
Dividend payable amount	$ 34,849
Common stock shares repurchased		273
Purchase of treasury stock		$ 20,773
Class A Common Stock [Member]
Components Of Shareholders Equity [Line Items]
Repurchase and retirement of common stock, Shares			738
Class A Treasury Stock [Member]
Components Of Shareholders Equity [Line Items]
Common stock shares repurchased			40
Purchase of treasury stock			$ 3,200
Treasury stock repurchased, and treasury stock repurchased and retired, shares			778
Treasury stock repurchased, and treasury stock repurchased and retired, amount			$ 63,527