Revenue Equipment On Operating Lease And Property, Plant, And Equipment (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2013	Jun. 30, 2013	Jun. 24, 2012	Sep. 29, 2013	Sep. 23, 2012	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Property, Plant and Equipment [Abstract]
Property, plant, and equipment under capital lease, gross						$ 1,400,000	$ 2,000,000
Property, plant, and equipment under capital lease, accumulated depreciation						1,200,000	1,500,000
Asset impairments	731,000	731,000	5,297,000	731,000	6,156,000	1,211,000	6,506,000	7,843,000
Depreciation expense						$ 14,600,000	$ 17,300,000	$ 22,300,000