SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Segment Reporting
NET SALES	$ 1,015,125	$ 993,857
Segment operating profit (loss)	48,446	44,217
Intersegment net sales
Segment Reporting
NET SALES	100,896	108,993
Corporate
Segment Reporting
Segment operating profit (loss)	(99)	3,313
North
Segment Reporting
NET SALES	278,333	270,186
Segment operating profit (loss)	14,419	7,232
North | Intersegment net sales
Segment Reporting
NET SALES	11,697	12,025
South
Segment Reporting
NET SALES	244,242	242,020
Segment operating profit (loss)	15,059	18,323
South | Intersegment net sales
Segment Reporting
NET SALES	18,617	18,649
West
Segment Reporting
NET SALES	360,097	362,468
Segment operating profit (loss)	23,254	18,695
West | Intersegment net sales
Segment Reporting
NET SALES	12,929	15,599
All Other
Segment Reporting
NET SALES	132,453	119,183
Segment operating profit (loss)	(4,187)	(3,346)
All Other | Intersegment net sales
Segment Reporting
NET SALES	$ 57,653	$ 62,720