Operating Income by Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 31, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Income
Operating Income	$ 6,677	$ 5,718	$ 4,347	$ 949	$ 3,297	$ 3,792	$ 5,097	$ 2,821	$ 17,691	$ 15,007	$ 35,848
Laser Products
Operating Income
Operating Income									23,388	19,225	28,572
Medical Technologies
Operating Income
Operating Income									3,566	8,285	8,855
Precision Motion
Operating Income
Operating Income									12,062	9,482	15,675
Corporate, Shared Services and Unallocated
Operating Income
Operating Income									$ (21,325)	$ (21,985)	$ (17,254)