Geographic Data - Schedule of Financial Information by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net Sales from continuing operations
Net sales	$ 101,584	$ 99,697	$ 98,693	$ 96,705	$ 93,282	$ 90,646	$ 100,071	$ 98,311	$ 396,679	$ 382,310	$ 404,021
United States | Operating Segments
Net Sales from continuing operations
Net sales									276,033	238,796	234,323
Singapore | Operating Segments
Net Sales from continuing operations
Net sales									6,668	8,379	11,510
China | Operating Segments
Net Sales from continuing operations
Net sales									59,506	55,825	61,683
Canada | Operating Segments
Net Sales from continuing operations
Net sales									0	24,519	35,145
Czech Republic | Operating Segments
Net Sales from continuing operations
Net sales									34,767	36,348	44,424
Other non-U.S. | Operating Segments
Net Sales from continuing operations
Net sales									$ 19,705	$ 18,443	$ 16,936