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

 
$
(19
)
 
$
—

 
$
13,910

Industrial Filtration
 
—

 
—

 
3,693

 
3,693

Other Products and Services
 
4,660

 
—

 
—

 
4,660

Total goodwill
 
$
18,589

 
$
(19
)
 
$
3,693

 
$
22,263
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 June 30, 2014 and December 31, 2013:
 
 
June 30, 2014
 
December 31, 2013
In thousands
 
Gross Carrying Amount
 
Accumulated Amortization
 
Gross Carrying Amount
 
Accumulated Amortization
Amortized intangible assets
 
 

 
 

 
 

 
 

License agreements
 
$
879

 
$
(879
)
 
$
881

 
$
(881
)
Technology
 
2,500

 
(60
)
 
—

 
—

Customer Relationships
 
2,553

 
(85
)
 
—

 
—

Patents
 
6,747

 
(3,470
)
 
6,766

 
(3,307
)
Other
 
830

 
(254
)
 
278

 
(227
)
Total amortized intangible assets
 
$
13,509

 
$
(4,748
)
 
$
7,925

 
$
(4,415
)