Revenue Equipment On Operating Lease And Property, Plant, And Equipment (Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 25, 2011	Dec. 26, 2010
Revenue Equipment On Operating Lease And Property, Plant, And Equipment [Abstract]
Equipment rented to customers	$ 3,732	$ 7,389
Accumulated depreciation	(1,812)	(5,049)
Total revenue equipment on operating lease	1,920	2,340
Land	9,862	10,416
Buildings	74,402	69,145
Machinery and equipment	204,215	168,253
Leasehold improvements	15,003	17,754
Construction in progress	10,282	15,222
Property, plant and equipment, Gross	313,764	280,790
Accumulated depreciation	(181,603)	(159,532)
Total property, plant, and equipment	$ 132,161	$ 121,258