Revenue Equipment On Operating Lease And Property, Plant, And Equipment (Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 30, 2012	Dec. 25, 2011
Property, Plant and Equipment [Abstract]
Equipment rented to customers	$ 3,522	$ 3,732
Accumulated depreciation	(1,774)	(1,812)
Total revenue equipment on operating lease	1,748	1,920
Land	8,894	9,862
Buildings	56,577	74,402
Machinery and equipment	172,398	204,215
Leasehold improvements	15,218	15,003
Construction in progress	5,724	10,282
Property, plant and equipment, Gross	258,811	313,764
Accumulated depreciation	(151,627)	(181,603)
Total property, plant, and equipment	$ 107,184	$ 132,161