SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 23, 2012	Sep. 29, 2013	Sep. 23, 2012
Changes in accumulated other comprehensive loss
Balance at the beginning of the period			$ (481,316)
Other comprehensive income (loss) before reclassifications			(666)
Amounts reclassified from AOCL			10,160
Other comprehensive income	3,452	1,861	9,494	3,868
Balance at the end of the period	(471,822)		(471,822)
Compensation	105,239	108,421	325,972	329,156
Provision for income taxes	2,911	(556)	5,066	(6,000)
Net of tax	(7,265)	(5,093)	(6,276)	(29,871)
Minimum Pension and Post-Retirement Liability
Changes in accumulated other comprehensive loss
Balance at the beginning of the period			(473,448)
Amounts reclassified from AOCL			10,160
Other comprehensive income			10,160
Balance at the end of the period	(463,288)		(463,288)
Minimum Pension and Post-Retirement Liability | Amount Reclassified from AOCI
Changes in accumulated other comprehensive loss
Compensation	5,645		16,933
Provision for income taxes	(2,258)		(6,773)
Net of tax	3,387		10,160
Other Comprehensive Loss Related to Equity Investments
Changes in accumulated other comprehensive loss
Balance at the beginning of the period			(7,868)
Other comprehensive income (loss) before reclassifications			(666)
Other comprehensive income			(666)
Balance at the end of the period	$ (8,534)		$ (8,534)