LONG-TERM DEBT (Details) (USD $)						0 Months Ended	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Jun. 25, 2011	Dec. 28, 2013 6.625% senior unsecured notes due in April 2020	Dec. 29, 2012 6.625% senior unsecured notes due in April 2020	Aug. 15, 2012 Revolving credit agreement	Dec. 28, 2013 Revolving credit agreement	Dec. 28, 2013 Revolving credit agreement LIBOR	Dec. 28, 2013 Revolving credit agreement LIBOR Minimum	Dec. 28, 2013 Revolving credit agreement LIBOR Maximum	Dec. 28, 2013 Revolving credit agreement Prime lending rate	Dec. 28, 2013 Revolving credit agreement Federal Funds rate	Dec. 28, 2013 Revolving credit agreement Federal Funds rate Minimum	Dec. 28, 2013 Revolving credit agreement Federal Funds rate Maximum	Dec. 28, 2013 IDR Bonds	Dec. 29, 2012 IDR Bonds	Dec. 28, 2013 Other notes	Dec. 29, 2012 Other notes
Long-term debt:
Total long-term debt	$ 471,109,000	$ 472,817,000		$ 450,000,000	$ 450,000,000										$ 8,500,000	$ 8,500,000	$ 1,368,000	$ 1,609,000
Unamortized premium on senior unsecured notes				11,241,000	12,708,000
Less current installments of long-term debt	202,000	224,000
Long-term debt, excluding current installments	470,907,000	472,593,000
Interest rate on notes (as a percent)				6.625%	6.625%
Aggregate principal amount			150,000,000	450,000,000
Term of multicurrency revolving credit agreement						5 years
Maximum borrowing capacity						400,000,000
Increase in borrowing capacity, maximum							200,000,000
Variable interest rate basis								LIBOR (based on a 1, 2, 3 or 6 month interest period, as selected by the Company)			Prime lending rate	Federal Funds Rate
Basis points added to variable rate (as a percent)									1.25%	2.25%		0.50%	0.25%	1.25%
Variable interest rate, base period								1 month
Additional borrowing capacity							382,100,000
Standby letters of credit outstanding							17,900,000
Effective interest rate (as a percent)															0.21%	0.30%
Minimum aggregate maturities of long-term debt
2014	202,000
2015	235,000
2016	229,000
2017	15,000
2018	$ 7,000