Goodwill & Other Identifiable Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2012

Goodwill & Other Identifiable Intangible Assets [Abstract]

Changes In Carrying Amounts Of Goodwill By Segment

	Activated Carbon & Service Segment		Equipment Segment		Consumer Segment		Total
Balance as of December 31, 2011	$	20,167	$	6,612	$	60	$	26,839
Foreign exchange		105		45		—		150
Balance as of March 31, 2012	$	20,272	$	6,657	$	60	$	26,989

Summary Of Identifiable Intangible Assets

			March 31, 2012
	Weighted Average Amortization  Period		Gross Carrying Amount		Foreign Exchange			Accumulated Amortization			Net Carrying Amount
Amortized Intangible Assets:
Patents		15.4 Years	$	1,369	$	—		$	(1,208	)	$	161
Customer Relationships		16.0 Years		10,450		(219	)		(7,920	)		2,311
Product Certification		5.4 Years		6,023		(3	)		(3,185	)		2,835
Unpatented Technology		20.0 Years		2,875		—			(2,052	)		823
Licenses		20.0 Years		964		156			(109	)		1,011
Total		14.0 Years	$	21,681	$	(66	)	$	(14,474	)	$	7,141

			December 31, 2011
	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

Estimated Amortization Expense

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