Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
	Dec. 31, 2015	Nov. 28, 2015	Nov. 29, 2014	Dec. 16, 2015
Components Of Shareholders Equity [Line Items]
Regular dividends cash paid		$ 26,391	$ 24,563
Cash dividends paid			208,781
Special dividends cash paid			$ 184,218
Dividends declared date		Dec. 16, 2015
Dividend payable date		Jan. 26, 2016
Dividends record date		Jan. 12, 2016
Purchase of treasury stock		$ 5,796
Subsequent Event [Member]
Components Of Shareholders Equity [Line Items]
Cash dividends paid	$ 26,452
Dividends payable per share				$ 0.43
Regular Dividends [Member]
Components Of Shareholders Equity [Line Items]
Cash dividends paid per common share		$ 0.43	$ 0.40
Regular dividends cash paid		$ 26,391	$ 24,563
Special Dividends [Member]
Components Of Shareholders Equity [Line Items]
Cash dividends paid per common share			$ 3.00
Special dividends cash paid			$ 184,218
Class A Treasury Stock [Member]
Components Of Shareholders Equity [Line Items]
Class A common stock shares repurchased		97
Purchase of treasury stock		$ 5,796
Shares repurchased by the company for associates' tax withholding liability associated with share-based compensation		31
Maximum number of shares that can be repurchased		1,677