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Goodwill and Other Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2014
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 nine months ended September 30, 2014 were as follows:
 
 
December 31,
2013
 
Currency
translation adjustments
 
Additions
 
September 30, 2014
In thousands
 
 
 
 
Performance Materials
 
$
13,929

 
$
(398
)
 
$
—

 
$
13,531

Industrial Filtration
 
—

 
—

 
3,943

 
3,943

Other Products and Services
 
4,660

 
—

 
—

 
4,660

Total goodwill
 
$
18,589

 
$
(398
)
 
$
3,943

 
$
22,134
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 September 30, 2014 and December 31, 2013:
 
 
September 30, 2014
 
December 31, 2013
In thousands
 
Gross Carrying Amount
 
Accumulated Amortization
 
Gross Carrying Amount
 
Accumulated Amortization
Amortized intangible assets
 
 

 
 

 
 

 
 

License agreements
 
$
838

 
$
(838
)
 
$
881

 
$
(881
)
Technology
 
2,500

 
(101
)
 
—

 
—

Customer Relationships
 
2,513

 
(134
)
 
—

 
—

Patents
 
6,275

 
(3,318
)
 
6,766

 
(3,307
)
Other
 
818

 
(340
)
 
278

 
(227
)
Total amortized intangible assets
 
$
12,944

 
$
(4,731
)
 
$
7,925

 
$
(4,415
)