SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended
	Apr. 03, 2021 USD ($) reporting_segment	Apr. 04, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | reporting_segment	3
Total net sales	$ 1,267,032	$ 1,113,811
Total operating income (loss)	55,208	(500,791)
Unallocated other expense, net	(56,071)	(59,296)
Loss before income taxes	(863)	(560,087)
Total assets	5,528,306		$ 5,478,490
Windows
Segment Reporting Information [Line Items]
Total net sales	527,263	448,450
Siding
Segment Reporting Information [Line Items]
Total net sales	316,391	241,043
Commercial
Segment Reporting Information [Line Items]
Total net sales	423,378	424,318
Operating Segments | Windows
Segment Reporting Information [Line Items]
Total net sales	527,263	448,450
Total operating income (loss)	29,362	(313,190)
Total assets	1,737,880		1,717,032
Operating Segments | Siding
Segment Reporting Information [Line Items]
Total net sales	316,391	241,043
Total operating income (loss)	27,528	(168,867)
Total assets	2,116,233		2,123,615
Operating Segments | Commercial
Segment Reporting Information [Line Items]
Total net sales	423,378	424,318
Total operating income (loss)	41,585	16,841
Total assets	918,886		890,380
Corporate
Segment Reporting Information [Line Items]
Total operating income (loss)	(43,267)	$ (35,575)
Total assets	$ 755,307		$ 747,463