Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011
ACCRUED EXPENSES [Abstract]
Compensation and benefits	$ 28,100	$ 24,920
Utilities and sewage	4,992	5,106
Accrued income, ad valorem, and franchise taxes	2,164	2,374
Reserve for self insurance, litigation, environmental and tax matters (Note 18)	9,214	9,042
Medical claims liability	5,579	4,193
Griffin Transaction step up in basis (Note 2)	0	13,639
Other accrued expense	16,796	22,424
Accrued expenses	$ 66,845	$ 81,698