LONG-TERM DEBT (Details) (USD $)	12 Months Ended	1 Months Ended	0 Months Ended
	Dec. 27, 2014	Sep. 27, 2014	Aug. 15, 2012	Dec. 28, 2013	Sep. 22, 2014	Oct. 17, 2014
Long-term debt:
Total long-term debt	$ 767,835,000			$ 471,109,000
Less current installments of long-term debt	1,181,000			202,000
Long-term debt, excluding current installments	766,654,000			470,907,000
Minimum aggregate maturities of long-term debt
2014	1,181,000
2015	1,357,000
2016	1,068,000
2017	1,066,000
2018	900,000
5.00% senior unsecured notes due 2044
Long-term debt:
Aggregate principal amount	250,000,000				250,000,000
Total long-term debt	250,000,000
Unamortized premium on senior unsecured notes	1,155,000			1,155,000
Redemption price of notes, stated as a percentage of principal amount (as a percent)	100.00%
Interest rate on notes (as a percent)	5.00%			5.00%	5.00%
5.25% senior unsecured notes due 2054
Long-term debt:
Aggregate principal amount	250,000,000				250,000,000
Total long-term debt	250,000,000
Unamortized premium on senior unsecured notes	3,294,000
Redemption price of notes, stated as a percentage of principal amount (as a percent)	100.00%
Interest rate on notes (as a percent)	5.25%			5.25%	5.25%
Unamortized discount on 5.00% and 5.25% senior unsecured notes
Long-term debt:
Unamortized premium on senior unsecured notes	(4,449,000)
6.625% senior unsecured notes due in April 2020
Long-term debt:
Aggregate principal amount	250,200,000
Total long-term debt	250,200,000			450,000,000	250,200,000
Unamortized premium on senior unsecured notes	5,429,000
Unamortized premium recognized as revenue		4,439,000
Redemption price of notes, stated as a percentage of principal amount (as a percent)	100.00%
Cash prepayment expenses		41,200,000
Interest rate on notes (as a percent)	6.625%			6.625%	6.625%
Repurchase amount through partial tender offer					199,800,000
Unamortized premium on 6.625% senior unsecured notes
Long-term debt:
Unamortized premium on senior unsecured notes	5,429,000			11,241,000
Revolving credit agreement
Long-term debt:
Total long-term debt	0
Term of multicurrency revolving credit agreement			5 years
Previous borrowing capacity						400,000,000
Maximum borrowing capacity						600,000,000
Increase in borrowing capacity, maximum	200,000
Additional borrowing capacity	582,400,000
Standby letters of credit outstanding	17,600,000
Revolving credit agreement | Minimum
Long-term debt:
Basis points added to variable rate (as a percent)	0.00%
Revolving credit agreement | Maximum
Long-term debt:
Basis points added to variable rate (as a percent)	6.25%
Revolving credit agreement | LIBOR
Long-term debt:
Variable interest rate basis	LIBOR (based on a 1, 2, 3 or 6 month interest period, as selected by the Company)
Basis points added to variable rate (as a percent)	1.00%
Variable interest rate, base period	1 month
Revolving credit agreement | LIBOR | Minimum
Long-term debt:
Basis points added to variable rate (as a percent)	1.00%
Revolving credit agreement | LIBOR | Maximum
Long-term debt:
Basis points added to variable rate (as a percent)	1.625%
Revolving credit agreement | Prime lending rate
Long-term debt:
Variable interest rate basis	Prime Lending Rate
Revolving credit agreement | Federal Funds rate
Long-term debt:
Variable interest rate basis	Federal Funds Rate
Basis points added to variable rate (as a percent)	50.00%
IDR Bonds
Long-term debt:
Total long-term debt	8,500,000			8,500,000
Effective interest rate (as a percent)	1.16%			0.21%
Other notes
Long-term debt:
Total long-term debt	8,155,000			1,368,000
Short Term Bank Lines Of Credit
Long-term debt:
Additional borrowing capacity	95,500,000
Balance	$ 108,600,000