CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss)/Income [Member]	Noncontrolling Interest [Member]
Beginning balance at Dec. 28, 2013	$ 436,417	$ 44,982	$ 16,729	$ 373,652	$ 965	$ 89
Comprehensive income:
Net income (loss)	54,177			54,389		(212)
Other comprehensive (loss) (net of tax)	(427)				(427)
Distributions to noncontrolling interest	(5)					(5)
Change in ownership of noncontrolling interest				(146)		146
Cash dividends	(33,208)			(33,208)
Common shares – treasury:
Shares purchased	(35,330)	(963)	(33,479)	(888)
Shares issued under Members’ Stock Purchase Plan and stock awards	17,923	376	17,547
Ending balance at Sep. 27, 2014	439,547	44,395	797	393,799	538	18
Beginning balance at Jan. 03, 2015	414,501	44,166	867	374,929	(5,375)	(86)
Comprehensive income:
Net income (loss)	73,175			73,205		(30)
Other comprehensive (loss) (net of tax)	(922)				(922)
Change in ownership of noncontrolling interest				(461)		461
Cash dividends	(34,629)			(34,629)
Common shares – treasury:
Shares purchased	(24,779)	(506)	(24,273)
Shares issued under Members’ Stock Purchase Plan and stock awards	28,463	521	27,942
Ending balance at Oct. 03, 2015	$ 455,809	$ 44,181	$ 4,536	$ 413,044	$ (6,297)	$ 345