SEGMENT REPORTING - Assets (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 28, 2019	Sep. 28, 2019
Segment Reporting
Segment assets	$ 2,350,620	$ 1,889,477	$ 1,880,625
Change in assets (as a percent)	24.40%
Corporate
Segment Reporting
Segment assets	$ 642,035	450,299
Change in assets (as a percent)	42.60%
Retail
Segment Reporting
Segment assets	$ 631,238	402,221
Change in assets (as a percent)	56.90%
Industrial
Segment Reporting
Segment assets	$ 389,806	377,329
Change in assets (as a percent)	3.30%
Construction
Segment Reporting
Segment assets	$ 525,596	522,638
Change in assets (as a percent)	0.60%
All Other
Segment Reporting
Segment assets	$ 161,945	$ 136,990
Change in assets (as a percent)	18.20%