SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - Ply Gem - shares		9 Months Ended
Nov. 16, 2018	Oct. 03, 2020
Business Acquisition [Line Items]
Shares issued in transaction (in shares)	58,709,067
Sale of stock, ownership percentage issued	47.00%
Equity not issued in merger (in shares)		57,103

Number of shares of equity interests issued or issuable to acquire entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

Name:	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration