SEGMENT INFORMATION (Details) $ in Thousands	2 Months Ended		3 Months Ended		6 Months Ended
	Dec. 31, 2018 operating_segment	Dec. 31, 2018 reporting_segment	Jun. 29, 2019 USD ($)	Apr. 29, 2018 USD ($)	Jun. 29, 2019 USD ($)	Apr. 29, 2018 USD ($)	Oct. 28, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments	3	3
Total net sales			$ 1,295,457	$ 457,069	$ 2,360,289	$ 878,418
Total operating income			80,931	18,956	53,566	31,854
Unallocated other expense, net			(58,052)	(26,722)	(114,601)	(33,253)
Income (loss) before income taxes			22,879	(7,766)	(61,035)	(1,399)
Total assets			5,653,740		5,653,740		$ 1,110,375
Commercial
Segment Reporting Information [Line Items]
Total net sales			480,285	457,069	905,246	878,418
Siding
Segment Reporting Information [Line Items]
Total net sales			306,525	0	524,802	0
Windows
Segment Reporting Information [Line Items]
Total net sales			508,647	0	930,241	0
Operating Segments | Commercial
Segment Reporting Information [Line Items]
Total net sales			480,285	457,069	905,246	878,418
Total operating income			58,809	40,022	83,119	77,821
Total assets			1,009,885		1,009,885		1,024,433
Operating Segments | Siding
Segment Reporting Information [Line Items]
Total net sales			306,525	0	524,802	0
Total operating income			25,937	0	14,283	0
Total assets			2,386,627		2,386,627		0
Operating Segments | Windows
Segment Reporting Information [Line Items]
Total net sales			508,647	0	930,241	0
Total operating income			31,912	0	27,593	0
Total assets			2,057,063		2,057,063		0
Corporate
Segment Reporting Information [Line Items]
Total operating income			(35,727)	$ (21,066)	(71,429)	$ (45,967)
Total assets			$ 200,165		$ 200,165		$ 85,942