Operating Income for Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2013		Mar. 30, 2012
Operating Income
Operating Income	$ 949		$ 2,821
Laser Products
Operating Income
Operating Income	4,208		3,880
Precision Technologies
Operating Income
Operating Income	3,459		4,153
Corporate, shared services and unallocated
Operating Income
Operating Income	$ (6,718)	[1]	$ (5,212)	[1]

[1] Corporate and shared services costs primarily represent corporate and shared service function costs which are not allocated to the operating segments, including restructuring and all acquisition related costs.