Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill by Segment

The changes in the carrying amount of goodwill by segment as of and for the three months ended March 31, 2015 were as follows:

	December 31, 2014		Currency translation adjustments			Other Activity			March 31, 2015
In thousands
Performance Materials	$	13,340	$	(487	)	$	—		$	12,853
Industrial Filtration	3,943		—			—			3,943
Other Products and Services	4,660		—			(4,660		)	—
Total goodwill	$	21,943	$	(487	)	$	(4,660	)	$	16,796

Amortization of the Company's Acquired Intangible Assets other than Goodwill

The table below presents the gross carrying amount and, as applicable, the accumulated amortization of the Company’s acquired intangible assets other than goodwill included in “Other intangible assets, net” in the Condensed Consolidated Balance Sheets as of March 31, 2015 and December 31, 2014:

	March 31, 2015					December 31, 2014
In thousands	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Amortized intangible assets
License agreements	$	767	$	(767	)	$	818	$	(818	)
Technology	2,500		(185		)	2,500		(143		)
Customer Relationships	2,439		(248		)	2,477		(195		)
Patents	5,430		(3,025		)	6,037		(3,274		)
Other	621		(209		)	691		(252		)
Total amortized intangible assets	$	11,757	$	(4,434	)	$	12,523	$	(4,682	)