Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements of Income [Abstract]
Net sales	$ 760,941	$ 787,287	$ 742,887
Cost of goods sold	455,545	473,121	460,914
Gross profit	305,396	314,166	281,973
Selling and general expenses	169,774	174,395	160,126
Technical, product engineering, and research expenses	52,962	55,846	53,391
Restructuring and other	7,061	9,317	3,747
Pension settlement expense	119,735
Operating (loss)/income	(44,136)	74,608	64,709
Interest income	(1,517)	(2,027)	(1,165)
Interest expense	18,118	20,148	18,405
Other expense/(income), net	7,629	2,639	(976)
(Loss)/income before income taxes	(68,366)	53,848	48,445
Income tax (benefit)/expense	(27,523)	32,582	21,022
(Loss)/income from continuing operations	(40,843)	21,266	27,423
Income from operations of discontinued businesses	4,776	24,101	16,073
Gain on sale of discontinued businesses	92,296
Income tax expense	25,252	10,429	5,860
Income from discontinued operations	71,820	13,672	10,213
Net income	$ 30,977	$ 34,938	$ 37,636
Earnings per share - Basic
(Loss)/income from continuing operations	$ (1.3)	$ 0.68	$ 0.88
Discontinued operations	$ 2.29	$ 0.44	$ 0.33
Net Income	$ 0.99	$ 1.12	$ 1.21
Earnings per share - Diluted
(Loss)/income from continuing operations	$ (1.3)	$ 0.67	$ 0.88
Discontinued operations	$ 2.27	$ 0.44	$ 0.33
Net Income	$ 0.97	$ 1.11	$ 1.21
Dividends declared per share	$ 0.55	$ 0.51	$ 0.48