Consolidated Statements of Earnings (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net Sales
Net sales	$ 382,310	$ 404,021	$ 409,461
Cost of goods sold	255,201	274,058	288,108
Gross Margin	127,109	129,963	121,353
Selling, general and administrative expenses	57,430	59,136	69,989
Research and development expenses	22,461	22,563	23,222
Non-recurring environmental expense	14,541	0	0
Restructuring and impairment charges	14,564	5,941	10,455
Operating earnings	18,113	42,323	17,687
Other (expense) income:
Interest expense	(2,628)	(2,326)	(3,264)
Interest income	3,073	2,786	1,901
Other (expense) income	(6,297)	(3,435)	1,739
Total other (expense) income	(5,852)	(2,975)	376
Earnings from continuing operations before taxes	12,261	39,348	18,063
Income tax expense	5,307	12,826	16,066
Earnings from continuing operations	6,954	26,522	1,997
Discontinued operations
Loss from discontinued operations, net of tax	0	0	(5,926)
Net earnings (loss)	$ 6,954	$ 26,522	$ (3,929)
Basic:
Continuing operations (usd per share)	$ 0.21	$ 0.79	$ 0.06
Discontinued operations (usd per share)	0	0	(0.18)
Net earnings (loss) per share (usd per share)	0.21	0.79	(0.12)
Diluted:
Continuing operations (usd per share)	0.21	0.78	0.06
Discontinued operations (usd per share)	0	0	(0.18)
Diluted net earnings (loss) per share (usd per share)	$ 0.21	$ 0.78	$ (0.12)
Basic weighted-average common shares outstanding (in shares)	32,959	33,618	33,601
Effect of dilutive securities (in shares)	525	512	648
Diluted weighted - average common shares outstanding (in shares)	33,484	34,130	34,249
Cash dividends declared per share (in dollars per share)	$ 0.160	$ 0.160	$ 0.145