Revenue Equipment On Operating Lease And Property, Plant, And Equipment (Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	Dec. 27, 2015	Dec. 28, 2014
Property, Plant and Equipment [Abstract]
Equipment rented to customers	$ 2,970	$ 3,818
Accumulated depreciation	(1,448)	(2,761)
Total revenue equipment on operating lease	1,522	1,057
Land	6,576	6,657
Buildings	53,323	51,645
Machinery and equipment	140,936	138,432
Leasehold improvements	13,109	13,836
Construction in progress	1,190	6,922
Property, plant and equipment, Gross	215,134	217,492
Accumulated depreciation	(139,270)	(141,160)
Total property, plant, and equipment	$ 75,864	$ 76,332