Segment Information (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Schedule of Consolidated Net Sales by Segment

Consolidated net sales by segment:

	Quarter Ended   March 31,
In thousands	2018			2017
Performance Materials Segment:
Filtration	$	20,690		$	18,846
Thermal Insulation	7,507			7,425
Life Sciences Filtration	2,496			2,480
Performance Materials Segment net sales	30,693			28,751
Technical Nonwovens Segment:
Industrial Filtration	40,231			34,214
Advanced Materials (1)	27,310			24,704
Technical Nonwovens net sales	67,541			58,918
Thermal Acoustical Solutions Segment:
Parts	88,122			81,814
Tooling	13,315			2,971
Thermal Acoustical Solutions Segment net sales	101,437			84,785
Eliminations and Other (1)	(8,011		)	(6,967		)
Consolidated Net Sales	$	191,660		$	165,487

Schedule of Operating Income by Segment

Operating income by segment:

	Quarter Ended   March 31,
In thousands	2018			2017 (2)
Performance Materials	$	2,641		$	1,658
Technical Nonwovens	5,006			4,668
Thermal Acoustical Solutions	12,614			14,796
Corporate Office Expenses	(6,225		)	(5,974		)
Consolidated Operating Income	$	14,036		$	15,148

(1) Included in the Technical Nonwovens segment and Eliminations and Other is $7.1 million and $6.3 million in intercompany sales to the Thermal Acoustical Solutions segment for the quarters ended March 31, 2018 and 2017, respectively.

(2) First quarter 2017 segment operating income amounts of $0.2 million have been reclassified to other expense, net, to give effect to the adoption of ASU No. 2017-07, "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost".