SEGMENT REPORTING - NARRATIVE (Details) - item	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Concentration risk
Number of markets in which the entity operates (in markets)	3
Total Sales \| Customer Concentration \| Home Depot
Concentration risk
Percent of sales	19.00%	19.00%	20.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Publisher FASB
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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