Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
NET INCOME (LOSS)	$ 986	$ (4,654)	$ (42,241)
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Unrealized loss on interest rate swaps	(412)	(484)	(214)
Reclassification of loss into earnings from interest rate swaps	268	560	983
Amortization of unrealized loss on dedesignated interest rate swaps	93	0	0
Unrealized gain on available-for-sale securities	0	0	36
Reclassification of gain into earnings from available-for-sale securities	0	0	(181)
Unrecognized net actuarial gain on postretirement benefit plans	67	2	1
Reclassification of net actuarial gain into earnings from postretirement benefit plans	(18)	(59)	(57)
Reclassification of prior service credits into earnings from postretirement plans	(55)	(54)	(55)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(57)	(35)	513
COMPREHENSIVE INCOME (LOSS)	$ 929	$ (4,689)	$ (41,728)