v2.4.0.6
Derivative Instruments and Hedging Activities (Details 2) (Cash Flow Hedging [Member], Interest rate swap agreements [Member], USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 25, 2011
Jun. 30, 2012
Jun. 25, 2011
Cash Flow Hedging [Member] | Interest rate swap agreements [Member]
       
Amounts Affecting Consolidated Statements of Operations        
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income $ (146,000) $ (156,000) $ (292,000) $ (309,000)