Quarterly Financial Data (Schedule Of Quarterly Financial Information) (Details) (USD $)	3 Months Ended																12 Months Ended
	Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2010		Sep. 30, 2010		Jun. 30, 2010		Mar. 31, 2010		Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Quarterly Financial Data [Abstract]
Net sales	$ 138,200,000		$ 143,594,000	[1]	$ 135,298,000	[2]	$ 124,380,000		$ 131,469,000	[3]	$ 124,371,000	[4]	$ 123,574,000	[5]	$ 102,927,000	[6]	$ 541,472,000	$ 482,341,000	$ 411,910,000
Net sales less cost of products sold	42,699,000	[7]	48,564,000	[1],[7]	44,434,000	[2],[7]	41,391,000	[7]	43,330,000	[3],[7]	41,929,000	[4],[7]	43,062,000	[5],[7]	37,136,000	[6],[7]
Net income	4,941,000		14,515,000	[1]	11,291,000	[2]	8,477,000		12,506,000	[3]	9,952,000	[4]	2,916,000	[5]	9,476,000	[6]	39,224,000	34,850,000	39,159,000
Net income per common share, Basic	$ 0.09		$ 0.26	[1]	$ 0.20	[2]	$ 0.15		$ 0.22	[3]	$ 0.18	[4]	$ 0.05	[5]	$ 0.16	[6]	$ 0.70	$ 0.62	$ 0.72
Net income per common share, Diluted	$ 0.09		$ 0.25	[1]	$ 0.20	[2]	$ 0.15		$ 0.22	[3]	$ 0.18	[4]	$ 0.05	[5]	$ 0.16	[6]	$ 0.69	$ 0.61	$ 0.69
Average common shares outstanding, Basic	56,381		56,275	[1]	56,188	[2]	56,124		56,020,000	[3]	55,904,000	[4]	55,830,000	[5]	55,708,000	[6]	56,243,015	55,866,552	54,757,279
Average common shares outstanding, Diluted	57,032		56,983	[1]	57,054	[2]	56,893		56,816,000	[3]	56,686,000	[4]	56,748,000	[5]	56,725,000	[6]	56,993,948	56,742,277	56,529,273
Reduction in environmental liability					1,300,000												1,300,000
Unrecognized tax benefits	4,078,000		2,800,000						11,215,000								4,078,000	11,215,000	11,704,000	12,249,000
Gain on acquisitions															2,700,000			2,666,000
Charge related to litigation contingency									300,000		500,000		11,500,000				(337,000)	12,000,000	961,000
Reversed valuation allowances on foreign tax credit carryforwards											3,500,000
Loss on debt extinguishment									900,000										899,000
Employee separation cost																	2,200,000
Equipment failure cost																	1,700,000
Cost of outsourced product sales																	$ 1,700,000

[1] Includes $2.8 million of net earnings related to a reversal of net uncertain tax positions (Refer to Note 12 of the Company's consolidated financial statements contained in Item 8 of this Annual Report for further information).

[2] Includes a $1.3 million, pre-tax, reduction in an environmental liability. Refer to Note 16 of the Company's consolidated financial statements contained in Item 8 of this Annual Report for further information.

[3] Includes a $0.9 million loss on debt extinguishment and a $0.3 million charge related to a litigation contingency. Refer to Note 16 of the Company's consolidated financial statements contained in Item 8 of this Annual Report for further information.

[4] Includes $3.5 million of net earnings related to a reduction in valuation allowance associated with foreign tax credits and a net $0.5 million of charges related to litigation and other contingencies. Refer to Notes 12 and 16 of the Company's consolidated financial statements contained in Item 8 of this Annual Report for further information.

[5] Includes an $11.5 million charge related to a litigation contingency. Refer to Note 16 of the Company's consolidated financial statements contained in Item 8 of this Annual Report for further information.

[6] Includes a $2.7 million gain on acquisitions. The results of the last three quarters of 2010 include the impacts of the first quarter 2010 acquisitions. Refer to Note 2 of the Company's consolidated financial statements contained in Item 8 of this Annual Report for further information.

[7] Excludes depreciation.