EMPLOYEE BENEFITS - Contributions (Details) - Pension plan	12 Months Ended
	Dec. 27, 2015
Equity securities
Contributions and Cash Flows [Line Items]
Target Allocation (as a percent)	61.00%
Debt securities
Contributions and Cash Flows [Line Items]
Target Allocation (as a percent)	33.00%
Real estate
Contributions and Cash Flows [Line Items]
Target Allocation (as a percent)	6.00%
Minimum
Contributions and Cash Flows [Line Items]
Investment horizon of plan assets	10 years