CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest
Beginning balance at Dec. 30, 2017	$ 514,577	$ 43,354	$ 7,029	$ 467,296	$ (3,611)	$ 509
Comprehensive income:
Net income (loss)	2,461			2,510		(49)
Other comprehensive income (loss), net of tax	949				949
Change in ownership of non-controlling interest	0			(41)		41
Cash dividends	(12,381)			(12,381)
Common shares – treasury:
Shares purchased	(5,964)	(153)	(1,175)	(4,636)
Shares issued under Members' Stock Purchase Plan and stock awards, net of tax	14,599	329	14,270
Ending balance at Mar. 31, 2018	514,241	43,530	20,124	452,748	(2,662)	501
Beginning balance at Dec. 29, 2018	563,259	43,582	18,041	504,909	(3,599)	326
Comprehensive income:
Net income (loss)	1,020			1,022		(2)
Other comprehensive income (loss), net of tax	298				298
Reclassification of Stranded Tax Effects (ASU 2018-02)	0			739	(739)
Cash dividends	(12,872)			(12,872)
Common shares – treasury:
Shares purchased	(24,685)	(647)	(16,948)	(7,090)
Shares issued under Members' Stock Purchase Plan and stock awards, net of tax	15,232	404	14,828
Ending balance at Mar. 30, 2019	$ 545,251	$ 43,339	$ 15,921	$ 489,707	$ (4,040)	$ 324