SEGMENT REPORTING - Assets (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019	Jun. 29, 2019
Segment Reporting
Segment assets	$ 2,058,608	$ 1,889,477	$ 1,850,659
Change in assets (as a percent)	9.00%
Corporate
Segment Reporting
Segment assets	$ 480,785	450,299
Change in assets (as a percent)	6.80%
Retail
Segment Reporting
Segment assets	$ 583,480	402,221
Change in assets (as a percent)	45.10%
Industrial
Segment Reporting
Segment assets	$ 337,027	377,329
Change in assets (as a percent)	(10.70%)
Construction
Segment Reporting
Segment assets	$ 512,111	522,638
Change in assets (as a percent)	(2.00%)
All Other
Segment Reporting
Segment assets	$ 145,205	$ 136,990
Change in assets (as a percent)	6.00%