EMPLOYEE BENEFIT PLANS - Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Net periodic benefit costs
Service cost	$ 2,243	$ 2,227	$ 2,692
Interest cost on benefit obligations	478	688	653
Expected return on plan assets	(175)	(277)	(207)
Amortization of net loss	299	102	240
Net periodic benefit costs	$ 2,845	$ 2,740	$ 3,378