SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014
Components of accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (47,685)
Current-period comprehensive income (loss)	25,481
Balance at the end of the period	(22,204)
Foreign Currency Translation Adjustments
Components of accumulated other comprehensive income (loss)
Balance at the beginning of the period	(20,165)
Current-period comprehensive income (loss)	26,261
Balance at the end of the period	6,096
Unrealized Loss on Cash Flow Hedge
Components of accumulated other comprehensive income (loss)
Balance at the beginning of the period	(2,535)
Current-period comprehensive income (loss)	67
Balance at the end of the period	(2,468)
Defined Benefit Pension Plan
Components of accumulated other comprehensive income (loss)
Balance at the beginning of the period	(24,985)
Current-period comprehensive income (loss)	(847)
Balance at the end of the period	$ (25,832)