NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Nature of Business (Details)	12 Months Ended
	Dec. 30, 2017 item	Dec. 31, 2016 USD ($)
NATURE OF BUSINESS
Number of industry groups in which the entity operates	2
Number of companies collectively referred to as TMC	3
Heating Ventilation and Air Conditioning Industry [Member]
NATURE OF BUSINESS
Number of reportable segments	2
Construction Products Industry [Member]
NATURE OF BUSINESS
Number of reportable segments	2
Heating and Cooling | Cost of sales
RECLASSIFICATIONS
Insurance expense | $		$ (339,000)
Heating and Cooling | Selling and administrative
RECLASSIFICATIONS
Insurance expense | $		$ 339,000