EMPLOYEE BENEFITS (Narrative) (Details)		12 Months Ended
	Jan. 01, 2017 USD ($)	Dec. 31, 2016 USD ($) program investment_manager
Defined Benefit Plan Disclosure [Line Items]
Number of programs offered under health and dental benefit plan | program		2
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Eligibility, minimum required service period		1 year
Eligibility, minimum age		21 years
Estimated employer contribution in next fiscal year		$ 6,400,000
Number of external investment managers | investment_manager		6
Pension Benefits | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Retirement plan, employee deductible	$ 500
Percentage of retirement plan owed by employees 65 or older	50.00%
Percentage of retirement plan owed by employees less 65	100.00%