Goodwill and Long-Lived Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Gross and Net Carrying Amounts of Goodwill

Gross and net carrying amounts of goodwill at December 31, 2017 and 2016 were as follows:

In thousands	Performance Materials		Technical Nonwovens		Thermal/ Acoustical Metals			Totals
Goodwill	$	12,777	$	50,829	$	12,160		$	75,766
Accumulated amortization/impairment	—		—		(12,160		)	(12,160		)
Balance at December 31, 2016	12,777		50,829		—			63,606
Goodwill	13,307		55,662		12,160			81,129
Accumulated amortization/impairment	—		—		(12,160		)	(12,160		)
Balance at December 31, 2017	$	13,307	$	55,662	$	—		$	68,969

Schedule of Changes in the Carrying Amounts of Goodwill

The changes in the carrying amounts of goodwill in 2017 and 2016 were as follows:

In thousands	Performance Materials			Technical Nonwovens			Totals
Balance at January 1, 2016	$	12,898		$	3,943		$	16,841
Goodwill addition	—			47,987			47,987
Currency translation adjustment	(121		)	(1,101		)	(1,222		)
Balance at December 31, 2016	12,777			50,829			63,606
Goodwill adjustment	—			323			323
Currency translation adjustment	530			4,510			5,040
Balance at December 31, 2017	$	13,307		$	55,662		$	68,969

Schedule of 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 Consolidated Balance Sheets as of December 31, 2017 and 2016:

	December 31, 2017					December 31, 2016
In thousands	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Amortized intangible assets
Customer relationships	$	39,474	$	(4,460	)	$	36,131	$	(1,284	)
Patents	4,504		(3,821		)	4,028		(3,300		)
Technology	2,500		(644		)	2,500		(477		)
Trade names	4,288		(1,461		)	3,912		(394		)
License agreements	640		(640		)	583		(583		)
Other	586		(423		)	536		(205		)
Total amortized intangible assets	$	51,992	$	(11,449	)	$	47,690	$	(6,243	)