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Shareholders' Equity (Deficit): (Details) - USD ($)						9 Months Ended
	Jul. 29, 2015	May. 13, 2015	Apr. 29, 2015	Apr. 15, 2015	Jan. 28, 2015	Sep. 26, 2015	Sep. 27, 2014
Repurchase of Common Stock
Treasury Stock, Shares, Acquired						875,000
Value of shares repurchased						$ 74,261,500	$ 11,564,800
Dividends
Cash dividend approved by Board of Directors (in dollars per share)	$ 0.07		$ 0.07		$ 0.06
Tender Offer
Repurchase of Common Stock
Number of shares authorized				$ 875,000
Purchase Of Stock Price Per Share				$ 84.72
Treasury Stock, Shares, Acquired		875,000
Common Stock Repurchase Program
Repurchase of Common Stock
Number of additional shares that can be repurchased						166,700

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The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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