Operating Income by Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Operating Income
Operating Income	$ 4,068	$ 1,462
Laser Products
Operating Income
Operating Income	7,124	4,693
Medical Technologies
Operating Income
Operating Income	(117)	1,445
Precision Motion
Operating Income
Operating Income	2,643	2,014
Corporate, Shared Services and Unallocated
Operating Income
Operating Income	$ (5,582)	$ (6,690)