SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended	12 Months Ended
	Jun. 30, 2011	Jun. 25, 2011	Dec. 29, 2012 Y	Dec. 31, 2011	Dec. 25, 2010
Intangible assets
Intangible assets lives, Minimum (in years)			5
Intangible assets lives, Maximum (in years)			20
Derivative Instrument
Debt instrument issued, face amount		$ 150,000
Notional amount of derivative instrument		130,000
Payment to counterparty to settle the derivative contract	3,568
Loss on interest rate cash flow hedge derivative, recorded in accumulated other comprehensive income				3,568
Foreign Currency Translation Adjustments
Balance at the beginning of the period			16,070
Current-period comprehensive income			14,506
Balance at the end of the period			30,576	16,070
Unrealized Loss on Cash Flow Hedge
Balance at the beginning of the period			(3,335)
Current-period comprehensive income			400
Balance at the end of the period			(2,935)	(3,335)
Defined Benefit Pension Plan
Balance at the beginning of the period			51,317
Current-period comprehensive income			(35,020)
Balance at the end of the period			16,297	51,317
Accumulated other comprehensive income (loss)
Balance at the beginning of the period			64,052
Current-period comprehensive income			(20,114)
Balance at the end of the period			43,938	64,052
Research and Development
Research and development expenses			$ 7,100	$ 6,200	$ 5,500