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Operating Income (Loss) from Continuing Operations by Reportable Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Oct. 02, 2015 | Jul. 03, 2015 | Apr. 03, 2015 | Dec. 31, 2014 | Sep. 26, 2014 | Jun. 27, 2014 | Mar. 28, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Operating Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) from Continuing Operations | $ 4,214 | $ 9,007 | $ 10,315 | $ 5,397 | $ (34,176) | $ 6,822 | $ 6,480 | $ 4,068 | $ 28,933 | $ (16,806) | $ 19,446
Laser Products |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  | 35,971 | 33,053 | 25,143
Vision Technologies |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  | (2,057) | (43,079) | 3,566
Precision Motion |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  | 16,877 | 13,023 | 12,062
Unallocated Corporate and Shared Services |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  | $ (21,858) | $ (19,803) | $ (21,325)

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