SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Changes in accumulated other comprehensive loss
Balance at the beginning of the period	$ (304,901)
Other comprehensive income (loss) before reclassifications	725
Amounts reclassified from AOCL	1,882
Other comprehensive income (loss)	2,607	2,712
Balance at the end of the period	(302,294)
Compensation	111,116	112,576
Provision for income taxes	(12,246)	(5,725)
Net of tax	15,842	12,741
Minimum Pension and Post-Retirement Liability
Changes in accumulated other comprehensive loss
Balance at the beginning of the period	(296,669)
Amounts reclassified from AOCL	1,882
Other comprehensive income (loss)	1,882
Balance at the end of the period	(294,787)
Minimum Pension and Post-Retirement Liability | Amount Reclassified from AOCI
Changes in accumulated other comprehensive loss
Compensation	3,136	5,625
Provision for income taxes	(1,254)	(2,250)
Net of tax	1,882	3,375
Other Comprehensive Loss Related to Equity Investments
Changes in accumulated other comprehensive loss
Balance at the beginning of the period	(8,232)
Other comprehensive income (loss) before reclassifications	725
Other comprehensive income (loss)	725
Balance at the end of the period	$ (7,507)