Goodwill And Other Identifiable Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill And Other Identifiable Intangible Assets [Abstract]

Changes In Carrying Amounts Of Goodwill By Segment

(Dollars in thousands)	Activated Carbon and Service Segment			Equipment Segment			Consumer Segment		Total
Balance as of January 1, 2010	$	20,305		$	6,569		$	60	$	26,934
Foreign currency translation		(122	)		98			—		(24	)
Balance as of December 31, 2010		20,183			6,667			60		26,910
Foreign currency translation		(16	)		(55	)		—		(71	)
Balance as of December 31, 2011	$	20,167		$	6,612		$	60	$	26,839

Summary Of Identifiable Intangible Assets

	December 31, 2011
(Dollars in thousands)	Weighted Average Amortization Period		Gross Carrying Amount		Foreign Exchange			Accumulated Amortization			Net Carrying Amount
Amortized intangible assets:
Patents		15.4 Years	$	1,369	$	—		$	(1,197	)	$	172
Customer Relationships		16.0 Years		10,450		(261	)		(7,776	)		2,413
Product Certification		5.4 Years		6,023		(19	)		(2,960	)		3,044
Unpatented Technology		20.0 Years		2,875		—			(2,011	)		864
Licenses		20.0 Years		964		217			(95	)		1,086
Total		14.0 Years	$	21,681	$	(63	)	$	(14,039	)	$	7,579

	December 31, 2010
(Dollars in thousands)	Weighted Average Amortization Period		Gross Carrying Amount		Foreign Exchange			Accumulated Amortization			Net Carrying Amount
Amortized intangible assets:
Patents		15.4 Years	$	1,369	$	—		$	(1,128	)	$	241
Customer Relationships		16.0 Years		10,450		(239	)		(7,138	)		3,073
Product Certification		5.4 Years		5,327		—			(2,116	)		3,211
Unpatented Technology		20.0 Years		2,875		—			(1,848	)		1,027
Licenses		20.0 Years		964		151			(52	)		1,063
Total		14.0 Years	$	20,985	$	(88	)	$	(12,282	)	$	8,615

Estimated Amortization Expense

For the year ending December 31:	(Dollars in thousands)
2012	$	1,493
2013		1,455
2014		1,381
2015		768
2016		637