Business Acquisitions - Narratives (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended								10 Months Ended	12 Months Ended
	Mar. 11, 2016	Oct. 28, 2015	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, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition
Cost of goods sold												$ 256,251	$ 255,201	$ 274,058
Net Income (Loss) Attributable to Parent			$ 8,310	$ 3,720	$ 14,487	$ 7,863	$ (13,653)	$ (4,760)	$ 19,080	$ 6,287		34,380	6,954	$ 26,522
Minimum
Business Acquisition
Projected market value			150,000								$ 150,000	150,000
Maximum
Business Acquisition
Projected market value			$ 300,000								300,000	300,000
CTG Advanced Materials, LLC [Member]
Business Acquisition
Business Acquisition, Pro Forma Revenue												398,990	395,495
Business Combination, Acquisition Related Costs											804
Cost of goods sold											1,151
Business Acquisition, Pro Forma Net Income (Loss)												$ 34,321	$ 8,800
Revenues											12,299
Business Acquisition, Transaction Costs	$ 804
Total cash purchase price	$ 73,063
Net Income (Loss) Attributable to Parent											$ 1,357
Business Acquisition, Pro Forma Earnings Per Share, Basic												$ 1.05	$ 0.27
Business Acquisition, Pro Forma Earnings Per Share, Diluted												$ 1.03	$ 0.26
Filter Sensing Technologies Inc.
Business Acquisition
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		$ 1,205
Total cash purchase price		1,855
Fair value of contingent consideration		$ 1,550