Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

The following table sets forth information with respect to goodwill and other intangible assets:

	December 31
In thousands		2020			2019
Goodwill
Composite Fibers	$	84,586		$	77,775
Airlaid Materials		79,783			73,041
Total Goodwill	$	164,369		$	150,816
Other Intangible Assets
Composite Fibers
Tradename – non amortizing	$	3,902		$	4,470
Technology and related		41,578			38,256
Customer relationships and related		37,535			34,445
Airlaid Materials
Tradename		3,960			3,625
Technology and related		20,053			18,406
Customer relationships and related		26,636			24,385
Total intangibles		133,664			123,587
Accumulated amortization		(51,829	)		(39,852	)
Net intangibles	$	81,835		$	83,735

Summary of Amortization of Intangible Assets

The following table sets forth information pertaining to amortization of intangible assets:

In thousands			2020		2019		2018
Aggregate amortization expense:		$	8,014	$	7,986	$	5,680
Estimated amortization expense:
	2021		7,626
	2022		7,511
	2023		7,511
	2024		7,511
	2025		7,511