SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Mar. 26, 2016
Segment Reporting
Net sales	$ 846,130	$ 682,151
Segment operating profit	33,821	31,911
Intersegment net sales
Segment Reporting
Net sales	75,288	50,010
Corporate
Segment Reporting
Segment operating profit	(5,755)	(9,395)
North | Operating Segments
Segment Reporting
Net sales	227,920	202,725
Segment operating profit	9,978	9,289
North | Intersegment net sales
Segment Reporting
Net sales	16,171	13,114
South | Operating Segments
Segment Reporting
Net sales	188,743	165,099
Segment operating profit	10,689	12,136
South | Intersegment net sales
Segment Reporting
Net sales	17,278	9,190
West | Operating Segments
Segment Reporting
Net sales	319,161	277,588
Segment operating profit	18,305	17,320
West | Intersegment net sales
Segment Reporting
Net sales	21,833	22,256
All Other | Operating Segments
Segment Reporting
Net sales	110,306	36,739
Segment operating profit	604	2,561
All Other | Intersegment net sales
Segment Reporting
Net sales	$ 20,006	$ 5,450