Operating Income for Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 28, 2013		Jun. 29, 2012		Jun. 28, 2013		Jun. 29, 2012
Operating Income
Operating Income	$ 4,347		$ 5,097		$ 5,296		$ 7,918
Laser Products
Operating Income
Operating Income	4,398		4,054		8,605		7,934
Precision Technologies
Operating Income
Operating Income	4,819		6,366		8,278		10,519
Corporate, shared services and unallocated
Operating Income
Operating Income	$ (4,870)	[1]	$ (5,323)	[1]	$ (11,587)	[1]	$ (10,535)	[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.