SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012		Dec. 31, 2011		Dec. 25, 2010		Dec. 31, 2009
Allowance for Doubtful Accounts [Member]
Valuation Allowances and Reserves (Roll Forward)
Balance	$ 1,564		$ 5,447				$ 5,947
Charged to costs and expenses	867		(229)		4,763
Other additions	109	[1]	(2)	[1]	111	[1]
Deductions	896		3,652		5,374
Balance	1,644		1,564		5,447		5,947
Environmental Reserves [Member]
Valuation Allowances and Reserves (Roll Forward)
Balance	22,892		23,902				23,268
Charged to costs and expenses	3,056		392		5,378
Other additions	0		0		(6)
Deductions	1,313		1,402		4,738
Balance	24,635		22,892		23,902		23,268
Valuation Allowance of Deferred Tax Assets [Member]
Valuation Allowances and Reserves (Roll Forward)
Balance	29,705		28,714				33,812
Charged to costs and expenses	(1,224)		(443)		(5,496)
Other additions	1,913		1,434	[2]	398
Deductions	0		0		0
Balance	$ 30,394		$ 29,705		$ 28,714		$ 33,812

[1] Other consists primarily of bad debt recoveries as well as the effect of fluctuating foreign currency exchange rates in all years presented.

[2] Other includes the additions to valuation allowances in which previously unrecorded gross deferred tax assets and valuation allowances were recognized.