INCOME TAXES - Credits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
INCOME TAXES
Operating Loss Carryforwards	$ 196,500
Long-term liabilities relating to uncertain tax positions	18,100
Unrecognized tax benefits	15,621	$ 13,046	$ 12,889	$ 8,649
Gross accrued interest and penalties	2,500
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	8,100
Decreases in unrecognized tax benefits	1,100
Unrecognized Tax Benefits, Interest on Income Taxes Expense	(300)	100	(700)
Unrecognized Tax Benefits, Income Tax Penalties Expense	100	(100)
Net accrued interest and penalties	$ 2,500	$ 2,700	$ 2,700