CONSOLIDATED STATEMENTS OF EQUITY - 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. 29, 2012	$ 420,660	$ 44,951	$ 20,153	$ 353,942	$ 1,313	$ 301
Comprehensive income:
Net income (loss)	63,369			63,683		(314)
Other comprehensive (loss) (net of tax)	(348)				(348)
Distributions to noncontrolling interest	(167)					(167)
Change in ownership of noncontrolling interest	(210)			(479)		269
Cash dividends (dollars per share)	(43,494)			(43,494)
Common shares – treasury:
Shares purchased	(27,488)	(740)	(26,748)
Shares issued under Members’ Stock Purchase Plan and stock awards	24,095	771	23,324
Ending Balance at Dec. 28, 2013	436,417	44,982	16,729	373,652	965	89
Comprehensive income:
Net income (loss)	61,155			61,471		(316)
Other comprehensive (loss) (net of tax)	(6,340)				(6,340)
Distributions to noncontrolling interest	(5)					(5)
Change in ownership of noncontrolling interest	0			(146)		146
Cash dividends (dollars per share)	(44,328)			(44,328)
Common shares – treasury:
Shares purchased	(67,908)	(1,666)	(50,522)	15,720
Shares issued under Members’ Stock Purchase Plan and stock awards	35,510	850	34,660
Ending Balance at Jan. 03, 2015	414,501	44,166	867	374,929	(5,375)	(86)
Comprehensive income:
Net income (loss)	105,406			105,436		$ (30)
Other comprehensive (loss) (net of tax)	189				189
Distributions to noncontrolling interest	0
Change in ownership of noncontrolling interest	0			(461)		$ 461
Cash dividends (dollars per share)	(46,329)			(46,329)
Common shares – treasury:
Shares purchased	(26,657)	(550)	(26,107)
Shares issued under Members’ Stock Purchase Plan and stock awards	30,189	542	29,647
Ending Balance at Jan. 02, 2016	$ 477,299	$ 44,158	$ 4,407	$ 433,575	$ (5,186)	$ 345