Lydall (LDL) 10-Q 1 Aug 17 2017 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Jul. 18, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Trading Symbol	LDL
Entity Common Stock, Shares Outstanding		17,233,972
Entity Registrant Name	LYDALL INC /DE/
Entity Central Index Key	60,977
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net sales	$ 174,879	$ 137,235	$ 340,366	$ 266,935
Cost of sales	131,626	101,245	256,689	198,568
Gross profit	43,253	35,990	83,677	68,367
Selling, product development and administrative expenses	23,409	20,468	48,878	39,166
Operating income	19,844	15,522	34,799	29,201
Interest expense	795	110	1,401	254
Other expense (income), net	599	(499)	739	(666)
Income before income taxes	18,450	15,911	32,659	29,613
Income tax expense	5,303	5,098	7,797	9,631
Loss from equity method investment	22	0	68	0
Net income	$ 13,125	$ 10,813	$ 24,794	$ 19,982
Earnings per share:
Basic (in dollars per share)	$ 0.77	$ 0.64	$ 1.46	$ 1.19
Diluted (in dollars per share)	$ 0.76	$ 0.63	$ 1.44	$ 1.17
Weighted average number of common shares outstanding:
Basic (shares)	17,044	16,864	17,014	16,844
Diluted (shares)	17,262	17,074	17,272	17,036

CONDENSED CONSOLIDATED STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 13,125	$ 10,813	$ 24,794	$ 19,982
Other comprehensive income:
Foreign currency translation adjustments	11,784	(4,026)	14,513	(1,268)
Pension liability adjustment, net of tax	172	139	344	285
Unrealized loss on hedging activities, net of tax	(44)	0	(44)	0
Comprehensive income	$ 25,037	$ 6,926	$ 39,607	$ 18,999

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 63,542	$ 71,934
Accounts receivable, less allowances (2017 - $1,421; 2016 - $1,429)	114,708	103,316
Inventories	81,989	66,146
Taxes receivable	6,854	3,883
Prepaid expenses	4,780	4,085
Other current assets	7,105	6,242
Total current assets	278,978	255,606
Property, plant and equipment, at cost	377,226	359,961
Accumulated depreciation	(213,032)	(199,166)
Net, property, plant and equipment	164,194	160,795
Goodwill	66,854	63,606
Other intangible assets, net	41,273	41,447
Other assets, net	6,464	5,575
Total assets	557,763	527,029
Current liabilities:
Current portion of long-term debt	250	634
Accounts payable	69,429	56,346
Accrued payroll and other compensation	13,832	14,016
Accrued taxes	5,882	6,460
Other accrued liabilities	13,663	12,988
Total current liabilities	103,056	90,444
Long-term debt	107,048	128,141
Deferred tax liabilities	16,993	15,849
Benefit plan liabilities	12,354	14,729
Other long-term liabilities	5,146	4,410
Commitments and Contingencies (Note 14)
Stockholders’ equity:
Preferred stock	0	0
Common stock	249	249
Capital in excess of par value	84,987	82,387
Retained earnings	350,260	325,466
Accumulated other comprehensive loss	(33,137)	(47,950)
Treasury stock, at cost	(89,193)	(86,696)
Total stockholders’ equity	313,166	273,456
Total liabilities and stockholders’ equity	$ 557,763	$ 527,029

CONDENSED CONSOLIDATED BALANCE5

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowances of accounts receivable	$ 1,421	$ 1,429

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 24,794	$ 19,982
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,778	8,634
Long-lived asset impairment charge	772	0
Inventory step-up amortization	1,025	0
Deferred income taxes	157	(553)
Stock-based compensation	2,287	2,074
Loss from equity method investment	68	0
Changes in operating assets and liabilities:
Accounts receivable	(8,197)	(11,294)
Inventories	(14,202)	(704)
Accounts payable	15,479	8,226
Accrued payroll and other compensation	(729)	2,859
Accrued taxes	(977)	492
Other, net	(5,460)	3,691
Net cash provided by operating activities	27,795	33,407
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(353)	0
Capital expenditures	(15,068)	(15,549)
Net cash used for investing activities	(15,421)	(15,549)
Cash flows from financing activities:
Debt repayments	(21,566)	(10,297)
Common stock issued	313	404
Common stock repurchased	(2,497)	(710)
Net cash used for financing activities	(23,750)	(10,603)
Effect of exchange rate changes on cash	2,984	(449)
(Decrease) Increase in cash and cash equivalents	(8,392)	6,806
Cash and cash equivalents at beginning of period	71,934	75,909
Cash and cash equivalents at end of period	$ 63,542	$ 82,715

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Cash Flows [Abstract]
Non-cash capital expenditures incurred but not yet paid	$ 4.3	$ 2.7

Basis of Financial Statement Pr

Basis of Financial Statement Presentation	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Basis of Financial Statement Presentation	Basis of Financial Statement Presentation Description of Business Lydall, Inc. and its subsidiaries (the “Company” or “Lydall”) design and manufacture specialty engineered nonwoven filtration media, industrial thermal insulating solutions, and thermal and acoustical barriers for filtration/separation and heat abatement and sound dampening applications. On July 7, 2016, the Company completed an acquisition of the nonwoven and coating materials businesses primarily operating under the Texel (“Texel”) brand from ADS, Inc. (“ADS”), a Canadian based corporation. The Texel operations manufacture nonwoven needle punch materials and predominantly serve the geosynthetic, liquid filtration, and other industrial markets. The acquired businesses are included in the Company's Technical Nonwovens reporting segment. On December 31, 2016, the Company completed an acquisition of the nonwoven needle punch materials businesses, operating under the Gutsche (“Gutsche”) brand, a German based corporation. The Gutsche operations manufacture nonwoven needle punch materials and predominantly serve the industrial filtration and high performance nonwoven markets. The acquired businesses are included in the Company's Technical Nonwovens reporting segment. Basis of Presentation The accompanying Condensed Consolidated Financial Statements include the accounts of Lydall, Inc. and its subsidiaries. All financial information is unaudited for the interim periods reported. All significant intercompany transactions have been eliminated in the Condensed Consolidated Financial Statements. The Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The operating results of Texel and Gutsche have been included in the Consolidated Statements of Operations beginning on their respective dates of acquisition. As part of the acquisition of Texel, the Company acquired a fifty percent interest in a joint venture, Afitex Texel Geosynthetiques Inc., which is accounted for under the equity method of accounting. The year-end Condensed Consolidated Balance Sheet was derived from the December 31, 2016 audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. Management believes that all adjustments, which include only normal recurring adjustments necessary for a fair statement of the Company’s condensed consolidated financial position, results of operations and cash flows for the periods reported, have been included. For further information, refer to the audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 . Recent Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)." The objective of this standard update is to remove inconsistent practices with regard to revenue recognition between US GAAP and IFRS. The standard intends to improve comparability of revenue recognition practices across entities, industries, jurisdictions and capital markets. ASU 2014-09 is effective for the Company’s interim and annual reporting periods beginning January 1, 2018, and is to be adopted using either a full retrospective or modified retrospective transition method with early adoption permitted for annual periods beginning after December 15, 2016. The Company anticipates adopting ASU 2014-09 under the modified retrospective transition method, with the cumulative effect of initially adopting this standard recognized through retained earnings at the date of adoption. The new standard requires new comprehensive qualitative and quantitative disclosures relating to the nature, amount, timing and uncertainty of revenue arising from contracts with customers, including significant judgments and estimates used when applying the guidance. The Company is implementing a project plan that includes a phased approach to implementing ASU 2014-09. During the remainder of 2017, the Company is completing the second phase which includes conversion activities, such as establishing policies, identifying system impacts, integration of the standard update into financial reporting processes and systems, and developing an understanding of the financial impact of this statement on the Company’s consolidated financial statements. The Company continues to assess potential impacts to all of its segments under the new standard and has identified a potential impact to the timing of revenue recognition across all segments. The Company currently generally recognizes revenue at a point in time, whereas the implementation of the new standard could result in certain revenue streams moving to an over-time revenue recognition model. The Company anticipates the transition to the new standard will result in changes to revenue recognition practices, including areas described above, but the Company will be unable to quantify that impact until the second phase of the project has been completed. Subsequent to the issuance of ASU No. 2014-09, the FASB has issued the following update; ASU No. 2016-20, “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers”. The amendments in this update affects the guidance contained within ASU 2014-09 and will be assessed as part of the Company's revenue recognition project plan. In July 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-11, “Inventory” (Topic 330): Simplifying the Measurement of Inventory." This ASU requires an entity to measure inventory at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Subsequent measurement is unchanged for inventory measured using last-in, first-out (“LIFO”) or the retail inventory method. This ASU is effective for fiscal years beginning after December 15, 2016. The adoption of this ASU did not have any impact on the Company’s consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)". This ASU requires entities that lease assets with lease terms of more than 12 months to recognize right-of-use assets and lease liabilities created by those leases on their balance sheets. This ASU will also require new qualitative and quantitative disclosures to help investors and other financial statement users better understand the amount, timing, and uncertainty of cash flows arising from leases. This ASU is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the method and impact the adoption of ASU 2016-02 will have on the Company’s consolidated financial statements and disclosures. In May 2017, the FASB issued ASU No. 2017-09, "Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting". This ASU requires an entity to apply modification accounting in Topic 718 when there are changes to the terms or conditions of a share-based payment award, unless the fair value, vesting conditions, and classification of the modified award are the same as the original award immediately before the original award is modified. This ASU is effective for fiscal years beginning after December 15, 2017, with early adoption permitted. The Company is currently evaluating the method and impact the adoption of ASU 2016-09 will have on the Company’s consolidated financial statements and disclosures.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Acquisitions	Acquisitions On December 31, 2016, the Company completed an acquisition of the nonwoven needle punch materials businesses, which include MGF Gutsche & Co GmbH KG, FRG and Gutsche Environmental Technology (Yixing) Co. Ltd., China, operating under Gutsche (“Gutsche”), a German based corporation. The Gutsche operations manufacture nonwoven needle punch materials and predominantly serve the industrial filtration and high performance nonwoven markets. The Company acquired one hundred percent of Gutsche for $57.6 million , net of a receivable of $3.0 million related to an estimated post-closing purchase price adjustment. In the second quarter of 2017, the Company finalized the post closing adjustment resulting in an increase in the purchase price of $0.4 million resulting in a final purchase price of $58.0 million . The purchase price was financed with a combination of cash on hand and $31.6 million of borrowings through the Company's amended $175 million credit facility. The assets and liabilities of Gutsche have been included in the Consolidated Balance Sheet at December 31, 2016. The acquired businesses are included in the Company's Technical Nonwovens reporting segment. For the quarter ended June 30, 2017, Gutsche reported net sales and operating income of $12.1 million and $0.6 million , respectively. Operating income for the quarter ended June 30, 2017 included $0.2 million of purchase accounting inventory fair value step-up adjustments in cost of sales upon the sale of inventory and $0.2 million of restructuring expenses. There were no sales or operating income for Gutsche during the quarter ended June 30, 2016 as the acquisition occurred on December 31, 2016. For the six months ended June 30, 2017, Gutsche reported net sales and operating income of $23.3 million and $0.9 million , respectively. Operating income for the six months ended June 30, 2017 included $0.6 million of purchase accounting inventory fair value step-up adjustments in cost of sales upon the sale of inventory and $0.2 million of restructuring expenses. There were no sales or operating income for Gutsche during the six months ended June 30, 2016 as the acquisition occurred on December 31, 2016. On July 7, 2016, the Company completed an acquisition of the nonwoven and coating materials businesses primarily operating under Texel from ADS, a Canadian based corporation. The Texel operations manufacture nonwoven needle punch materials and predominantly serve the geosynthetic, liquid filtration, and other industrial markets. The Company acquired one hundred percent of Texel for $102.7 million in cash, including a post-closing working capital adjustment. The purchase price was financed with a combination of cash on hand and $85.0 million of borrowings through the Company’s amended $175 million credit facility. As part of the acquisition, the Company acquired a fifty percent interest in a joint venture, Afitex Texel Geosynthetiques, Inc., with a fair value of $0.6 million . The joint venture is accounted for under the equity method of accounting. The operating results of the Texel business are reported within the Technical Nonwovens segment. For the quarter ended June 30, 2017, Texel reported net sales and operating income of $20.8 million and $1.5 million , respectively. Operating income for the quarter ended June 30, 2017 included $0.3 million of purchase accounting inventory fair value step-up adjustments in cost of sales upon the sale of inventory. There were no sales or operating income for Texel during the quarter ended June 30, 2016 as the acquisition occurred on July 7, 2016. For the six months ended June 30, 2017, Texel reported net sales and operating income of $35.9 million and $2.0 million , respectively. Operating income for the six months ended June 30, 2017 included $0.5 million of purchase accounting inventory fair value step-up adjustments in cost of sales upon the sale of inventory. There were no sales or operating income for Texel during the six months ended June 30, 2016 as the acquisition occurred on July 7, 2016. The following table summarizes the fair values of identifiable assets acquired and liabilities assumed at the date of the acquisitions: In thousands Texel Gutsche Cash and cash equivalents $ 1,610 $ 9,400 Accounts receivable 13,355 7,736 Inventories 17,525 6,417 Prepaid expenses and other current assets 2,469 1,125 Non-current environmental indemnification receivable (Note 14) 925 — Property, plant and equipment, net 31,525 7,969 Investment in joint venture 616 — Goodwill (Note 4) 28,655 19,759 Other intangible assets, net (Note 4) 22,887 15,622 Other long term assets — 1,545 Total assets acquired $ 119,567 $ 69,573 Current liabilities $ (8,520 ) $ (8,376 ) Long-term environmental remediation liability (Note 14) (925 ) — Deferred tax liabilities (7,413 ) (470 ) Other long-term liabilities — (2,742 ) Total liabilities assumed (16,858 ) (11,588 ) Net assets acquired $ 102,709 $ 57,985 The final purchase price allocation related to Texel reflects post-closing adjustments pursuant to the terms of the Texel Stock Purchase Agreement. The final purchase price allocation related to Gutsche reflects post-closing adjustments pursuant to the terms of the Gutsche Share Purchase Agreement. The following table reflects the actual operating results of the Company for the quarter and six months ended June 30, 2017 and the unaudited pro forma operating results of the Company for the quarter and six months ended June 30, 2016, which give effect to the acquisitions of Texel and Gutsche as if they had occurred on January 1, 2015. The pro forma information includes the historical financial results of the Company and the acquired businesses. The pro forma results are not necessarily indicative of the operating results that would have occurred had the acquisitions been effective January 1, 2015, nor are they intended to be indicative of results that may occur in the future. The pro forma information does not include the effects of any synergies related to the acquisitions. Quarter Ended Six Months Ended (Actual) (Unaudited Pro Forma) (Actual) (Unaudited Pro Forma) In thousands 2017 2016 2017 2016 Net sales $ 174,879 $ 173,834 $ 340,366 $ 329,982 Net income $ 13,125 $ 13,537 $ 24,794 $ 23,239 Earnings per share: Basic $ 0.77 $ 0.80 $ 1.46 $ 1.38 Diluted $ 0.76 $ 0.79 $ 1.44 $ 1.36 Included in earnings during the quarter ended June 30, 2017 was $0.9 million of amortization expense and $0.5 million of fair value step-up adjustments to inventory related to Texel and Gutsche. Pro forma earnings during the quarter ended June 30, 2016 were adjusted to exclude non-recurring items such as acquisition related expenses of $1.5 million . Pro forma earnings during the quarter ended June 30, 2016 were adjusted to include $1.2 million of additional amortization expense of the acquired intangible assets recognized at fair value in purchase accounting, additional depreciation expense of $0.5 million resulting from increased basis of property, plant and equipment, as well as $0.5 million of interest expense associated with borrowings under the Company's Amended Credit Facility. Customer freight billings of $0.5 million were reclassed from costs of sales to net sales for the quarter ended June 30, 2016. Included in earnings during the six months ended June 30, 2017 was $2.0 million of amortization expense, $1.0 million of fair value step-up adjustments to inventory and acquisition related expenses of $0.1 million related to Texel and Gutsche. Pro forma earnings during the six months ended June 30, 2016 were adjusted to exclude non-recurring items such as acquisition related expenses of $2.1 million . Pro forma earnings during the six months ended June 30, 2016 were adjusted to include $2.3 million of additional amortization expense of the acquired intangible assets recognized at fair value in purchase accounting, additional depreciation expense of $1.0 million resulting from increased basis of property, plant and equipment, as well as $0.9 million of interest expense associated with borrowings under the Company's Amended Credit Facility. Customer freight billings of $0.8 million were reclassed from costs of sales to net sales for the six months ended June 30, 2016.

Inventories

Inventories	6 Months Ended
	Jun. 30, 2017
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories as of June 30, 2017 and December 31, 2016 were as follows: In thousands June 30, December 31, Raw materials $ 31,131 $ 24,518 Work in process 28,185 17,161 Finished goods 24,524 25,360 83,840 67,039 Less: Progress billings (1,851 ) (893 ) Total inventories $ 81,989 $ 66,146 Included in work in process is gross tooling inventory of $18.3 million and $10.3 million at June 30, 2017 and December 31, 2016 , respectively. Tooling inventory, net of progress billings, was $16.4 million and $9.4 million at June 30, 2017 and December 31, 2016 , respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill: The Company tests its goodwill for impairment annually in the fourth quarter, and whenever events or changes in circumstances indicate that the carrying value may exceed its fair value. The changes in the carrying amount of goodwill by segment as of and for the quarter ended June 30, 2017 were as follows: December 31, Currency translation adjustments Additions June 30, 2017 In thousands Performance Materials $ 12,777 $ 324 $ — $ 13,101 Technical Nonwovens 50,829 2,571 353 53,753 Total goodwill $ 63,606 $ 2,895 $ 353 $ 66,854 Goodwill Associated with Acquisitions and Divestitures The goodwill addition of $0.4 million within the Technical Nonwovens segment is the result of the final post-closing adjustment in the second quarter of 2017 related to the acquisition of Gutsche on December 31, 2016. Other Intangible Assets: 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, 2017 and December 31, 2016 : June 30, 2017 December 31, 2016 In thousands Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Amortized intangible assets Customer Relationships $ 38,036 $ (2,822 ) $ 36,131 $ (1,284 ) Patents 4,319 (3,602 ) 4,028 (3,300 ) Technology 2,500 (560 ) 2,500 (477 ) Trade Names 4,131 (909 ) 3,912 (394 ) License Agreements 618 (618 ) 583 (583 ) Other 564 (384 ) 536 (205 ) Total amortized intangible assets $ 50,168 $ (8,895 ) $ 47,690 $ (6,243 )

Long-term Debt and Financing Ar

Long-term Debt and Financing Arrangements	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Long-term Debt and Financing Arrangements	Long-term Debt and Financing Arrangements On July 7, 2016, the Company amended its $100 million senior secured revolving credit facility (“Amended Credit Facility”) which increased the available borrowing from $100 million to $175 million , added a fourth lender and extended the maturity date to July 7, 2021. The Amended Credit Facility is secured by substantially all of the assets of the Company. Under the terms of the Amended Credit Facility, the lenders are providing a $175 million revolving credit facility to the Company, under which the lenders may make revolving loans and issue letters of credit to or for the benefit of the Company and its subsidiaries. The Company may request the Amended Credit Facility be increased by an aggregate amount not to exceed $50 million through an accordion feature, subject to specified conditions set forth in the Amended Credit Facility. The Amended Credit Facility contains a number of affirmative and negative covenants, including financial and operational covenants. The Company is required to meet a minimum interest coverage ratio. The interest coverage ratio requires that, at the end of each fiscal quarter, the ratio of consolidated EBIT to Consolidated Interest Charges, both as defined in the Amended Credit Facility, may not be less than 2.0 to 1.0 for the immediately preceding 12 month period. In addition, the Company must maintain a Consolidated Leverage Ratio, as defined in the Amended Credit Facility, as of the end of each fiscal quarter of no greater than 3.0 to 1.0 . The Company must also meet minimum consolidated EBITDA as of the end of each fiscal quarter for the preceding 12 month period of $30 million . The Company was in compliance with all covenants at June 30, 2017 and December 31, 2016. Interest is charged on borrowings at the Company’s option of either: (i) Base Rate plus the Applicable Rate, or (ii) the Eurodollar Rate plus the Applicable Rate. The Base Rate is a fluctuating rate equal to the highest of (a) the federal funds rate plus 0.50% , (b) the prime rate as set by Bank of America, and (c) the Eurocurrency Rate plus 1.00% . The Eurocurrency Rate means (i) if denominated in LIBOR quoted currency, a fluctuating LIBOR per annum rate equal to the London Interbank Offered Rate; (ii) if denominated in Canadian Dollars, the rate per annum equal to the Canadian Dealer Offered Rate; or (iii) the rate per annum as designated with respect to such alternative currency at the time such alternative currency is approved by the Lenders. The Applicable Rate is determined based on the Company’s Consolidated Leverage Ratio (as defined in the Amended Credit Agreement). The Applicable Rate added to the Base Rate Committed Loans ranges from 15 basis points to 100 basis points, and the Applicable Rate added to Eurocurrency Rate Committed Loans and Letters of Credit ranges from 75 basis points to 175 basis points. The Company pays a quarterly fee ranging from 17.5 basis points to 30 basis points on the unused portion of the $175 million available under the Amended Credit Facility. In April 2017, the Company entered into a three -year interest rate swap agreement transacted with a bank which converts the interest on the first notional $60.0 million of the Company's one-month LIBOR-based borrowings under its revolver loan from a variable rate, plus the borrowing spread, to a fixed rate of 1.58% plus the borrowing spread. The notional amount reduces quarterly by $5.0 million through March 31, 2020. The Company is accounting for the interest rate swap agreement as a cash flow hedge. Effectiveness of this derivative agreement will be assessed quarterly by ensuring that the critical terms of the swap continue to match the critical terms of the hedged debt. At June 30, 2017 , the Company had borrowing availability of $64.6 million under the Amended Credit Facility, net of $106.6 million of borrowings outstanding and standby letters of credit outstanding of $3.8 million . In addition to the amounts outstanding under the Amended Credit Facility, the Company has various acquired foreign credit facilities totaling approximately $11.2 million . At June 30, 2017 , the Company's foreign subsidiaries had $0.1 million in borrowings outstanding as well as $2.5 million in standby letters of credit outstanding. Total outstanding debt consists of: June 30, December 31, In thousands Effective Rate Maturity 2017 2016 Revolver Loan, due July 7, 2021 2.48 % 2021 $ 106,600 $ 126,600 Commerzbank Loan, due January 2, 2017 3.40 % 2017 — 400 Sparkasse Loan, due December 31, 2024 0.80 % 2024 — 1,030 Capital Leases 1.65% - 2.08% 2019 - 2020 698 745 107,298 128,775 Less portion due within one year (250 ) (634 ) Total long-term debt $ 107,048 $ 128,141 The carrying value of the Company’s $175 million Amended Credit Facility approximates fair value given the variable rate nature of the debt. The fair values of the Company’s long-term debt are determined using discounted cash flows based upon the Company’s estimated current interest cost for similar type borrowings or current market value, which falls under Level 2 of the fair value hierarchy. The carrying values of the long-term debt approximate fair market value. The weighted average interest rate on long-term debt was 2.0% for the six months ended June 30, 2017 and 1.4% for the year ended December 31, 2016 .

Derivatives

Derivatives	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives The Company selectively uses financial instruments to manage market risk associated with exposure to fluctuations in interest rates. These financial exposures are monitored and managed by the Company as an integral part of its risk management program. The Company’s interest rate exposure is most sensitive to fluctuations in interest rates in the United States and Europe, which impact interest paid on its debt. The Company has debt with variable rates of interest based generally on LIBOR. From time to time, the Company may enter into interest rate swap agreements to manage interest rate risk. These instruments are designated as cash flow hedges and are recorded at fair value using Level 2 observable market inputs. Derivative instruments are recognized as either assets or liabilities on the balance sheet in either current or non-current other assets or other accrued liabilities or other long-term liabilities depending upon maturity and commitment. For derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods in which the hedge transaction affects earnings. Any ineffective portion, or amounts related to contracts that are not designated as hedges, are recorded directly to earnings. The Company's policy for classifying cash flows from derivatives is to report the cash flows consistent with the underlying hedged item. The Company does not use derivatives for speculative or trading purposes or to manage commodity exposures. In April 2017, the Company entered into a three -year interest rate swap agreement transacted with a bank which converts the interest on the first notional $60.0 million of the Company's one-month LIBOR-based borrowings under its revolver loan from a variable rate, plus the borrowing spread, to a fixed rate of 1.58% plus the borrowing spread. The notional amount reduces quarterly by $5.0 million through March 31, 2020. The interest rate swap agreement was accounted for as cash flow hedge. Effectiveness of this derivative agreement will be assessed quarterly by ensuring that the critical terms of the swap continue to match the critical terms of the hedged debt. The following table sets forth the fair value amounts of derivative instruments held by the Company: June 30, 2017 December 31, 2016 In thousands Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives Derivatives designated as hedging instruments: Interest rate contract $ — $ (69 ) $ — $ — Total derivatives $ — $ (69 ) $ — $ — The following table sets forth the loss, recorded in accumulated other comprehensive income (loss), net of tax, for the quarters and six months ended June 30, 2017 and 2016 for derivatives held by the Company and designated as hedging instruments: Quarter Ended Six Months Ended 2017 2016 2017 2016 Cash flow hedges: Interest rate contract $ (44 ) $ — $ (44 ) $ — $ (44 ) — $ (44 ) $ —

Equity Compensation Plans

Equity Compensation Plans	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Compensation Plans	Equity Compensation Plans As of June 30, 2017 , the Company’s equity compensation plans consisted of the 2003 Stock Incentive Compensation Plan (the “2003 Plan”) and the 2012 Stock Incentive Plan (the “2012 Plan” and together with the 2003 Plan, the “Plans”) under which incentive and non-qualified stock options and time and performance based restricted shares have been granted to employees and directors from authorized but unissued shares of common stock or treasury shares. The 2003 Plan is not active, but continues to govern all outstanding awards granted under the plan until the awards themselves are exercised or terminate in accordance with their terms. The 2012 Plan, approved by shareholders on April 27, 2012, authorizes 1.75 million shares of common stock for awards. The 2012 Plan also authorizes an additional 1.2 million shares of common stock to the extent awards granted under prior stock plans that were outstanding as of April 27, 2012 are forfeited. The 2012 Plan provides for the following types of awards: options, restricted stock, restricted stock units and other stock-based awards. The Company accounts for the expense of all share-based compensation by measuring the awards at fair value on the date of grant. The Company recognizes expense on a straight-line basis over the vesting period of the entire award. Options issued by the Company under its stock option plans have a term of ten years and generally vest ratably over a period of three to four years. Time-based restricted stock grants are expensed over the vesting period of the award, which is typically two to four years. The number of performance based restricted shares that vest or forfeit depend upon achievement of certain targets during the performance period. Prior to January 1, 2016, stock compensation expense included estimated effects of forfeitures. Upon adoption of ASU 2016-09, Improvements to Employee Share-Based Payment Accounting , in the first quarter of 2016, an accounting policy election was made to account for forfeitures as they occur. Compensation expense for performance based awards is recorded based upon the service period and management’s assessment of the probability of achieving the performance goals and will be adjusted based upon actual achievement. The Company incurred equity compensation expense of $1.1 million and $0.9 million for the quarters ended June 30, 2017 and June 30, 2016 , respectively, and $2.3 million and $2.1 million for the six months ended June 30, 2017 and June 30, 2016, respectively, for the Plans, including restricted stock awards. No equity compensation costs were capitalized as part of inventory. Stock Options The following table is a summary of outstanding and exercisable options as of June 30, 2017 : In thousands except per share amounts and years Shares Weighted- Average Exercise Price Aggregate Intrinsic Value Outstanding at June 30, 2017 399 $ 26.34 $ 10,588 Exercisable at June 30, 2017 219 $ 16.49 $ 7,727 Unvested at June 30, 2017 179 $ 38.41 $ 2,860 There were no stock options granted and 16,300 stock options exercised during the quarter ended June 30, 2017 and no stock options granted and 28,464 stock options exercised during the six months ended June 30, 2017. The amount of cash received from the exercise of stock options was $0.2 million during the quarter ended June 30, 2017 and $ 0.3 million during the six months ended June 30, 2017. The intrinsic value of stock options exercised was $0.7 million with a tax benefit of $0.1 million during the quarter ended June 30, 2017 and the intrinsic value of stock options exercised was $1.2 million with a tax benefit of $0.3 million during the six months ended June 30, 2017. There were no stock options granted and 9,313 stock options exercised during the quarter ended June 30, 2016 and 18,300 stock options granted and 27,639 stock options exercised during the six months ended June 30, 2016. The amount of cash received from the exercise of stock options was $0.1 million during the quarter ended June 30, 2016 and $0.4 million during the six months ended June 30, 2016. The intrinsic value of stock options exercised was $0.3 million with a minimal tax benefit during the quarter ended June 30, 2016 and the intrinsic value of stock options exercised was $0.6 million with a tax benefit of $0.1 million during the six months ended June 30, 2016. At June 30, 2017 , the total unrecognized compensation cost related to non-vested stock option awards was approximately $2.3 million , with a weighted average expected amortization period of 2.6 years . Restricted Stock Restricted stock includes both performance-based and time-based awards. There were no time-based restricted stock shares granted during the quarter and six month period ended June 30, 2017 . There were no performance-based restricted shares granted during the quarter ended June 30, 2017 and 18,100 performance-based restricted shares granted for the six months ended June 30, 2017, which have a 2019 earnings per share target. There were no performance-based restricted shares that vested during the quarter ended June 30, 2017 and 108,600 performance-based restricted shares that vested during the six months ended June 30, 2017. There were no time-based restricted shares that vested during the quarter ended June 30, 2017 and 9,288 time-based restricted shares that vested during the six months ended June 30, 2017. There were no time-based restricted shares granted during the quarter ended June 30, 2016 and 7,930 time-based restricted shares granted during the six months ended June 30, 2016. There were no performance-based restricted shares granted during the quarter ended June 30, 2016 and 7,380 performance-based shares granted in the six months ended June 30, 2016, which have a 2018 earnings per share target. There were no performance-based restricted shares that vested during the quarter ended June 30, 2016 and there were 65,087 performance-based restricted shares that vested during the six months ended June 30, 2016 in accordance with Plan provisions. There were no time-based restricted shares that vested during the quarter ended June 30, 2016 and there were 8,129 time-based restricted shares that vested during the six months ended June 30, 2016. At June 30, 2017 , there were 193,925 unvested restricted stock awards with total unrecognized compensation cost related to these awards of $4.4 million with a weighted average expected amortization period of 2.0 years . Compensation expense for performance based awards is recorded based on the service period and management’s assessment of the probability of achieving the performance goals.

Stock Repurchases

Stock Repurchases	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Stock Repurchases	Stock Repurchases During the six months ended June 30, 2017 , the Company purchased 42,308 shares of common stock valued at $2.5 million , through withholding, pursuant to provisions in agreements with recipients of restricted stock granted under the Company’s equity compensation plans, in which the Company withholds that number of shares having fair value equal to each recipient’s minimum tax withholding due.

Restructuring

Restructuring	6 Months Ended
	Jun. 30, 2017
Restructuring and Related Activities [Abstract]
Restructuring	Restructuring In April 2017, the Company commenced a restructuring plan in the Technical Nonwovens segment which will include plant consolidations and transfer of equipment to other facilities within the segment's Europe and China operations. The consolidation of certain plants, which is expected to conclude in the second quarter of 2019, is expected to reduce operating costs, increase efficiency and enhance the Company’s flexibility by better aligning its manufacturing footprint with the segment's customer base. Accordingly, the Company expects to record pre-tax expenses of approximately $5.0 million , in connection with this restructuring plan, of which approximately $4.8 million is expected to result in future cash expenditures over the period of consolidation. Approximately $2.0 million of expenses are expected during the second half of 2017, predominately in the fourth quarter. The Company also expects to incur cash expenditures of approximately $3.5 million for capital expenditures associated with this plan. During the quarter and six months ended June 30, 2017, the Company recorded pre-tax restructuring expenses of $0.3 million . Restructuring expenses of $0.2 million , related to contract termination and other associated expenses, were recorded in selling, product development and administrative expenses and $0.1 million of severance related expenses were recorded in cost of sales. Actual pre-tax expenses incurred and total estimated pre-tax expenses for the restructuring program by type are as follows: In thousands Severance and Related Expenses Contract Termination Expenses Facility Exit, Move and Set-up Expenses Total Expense incurred during quarter ended: June 30, 2017 74 185 34 293 Total pre-tax expense incurred $ 74 $ 185 $ 34 $ 293 Estimated remaining expense at June 30, 2017 1,600 50 3,050 4,700 Total estimated pre-tax expense $ 1,674 $ 235 $ 3,084 $ 4,993 There were no cash outflows for the restructuring program for the quarter and six months ended June 30, 2017. Accrued restructuring costs were as follows at June 30, 2017: In thousands Total Balance as of March 31, 2017 $ — Pre-tax restructuring expenses 293 Cash paid — Balance as of June 30, 2017 $ 293

Employer Sponsored Benefit Plan

Employer Sponsored Benefit Plans	6 Months Ended
	Jun. 30, 2017
Retirement Benefits [Abstract]
Employer Sponsored Benefit Plans	Employer Sponsored Benefit Plans As of June 30, 2017 , the Company maintains a defined benefit pension plan that covers certain domestic Lydall employees (“domestic pension plan”) that is closed to new employees and benefits are no longer accruing. The domestic pension plan is noncontributory and benefits are based on either years of service or eligible compensation paid while a participant is in the plan. The Company’s funding policy is to fund not less than the ERISA minimum funding standard and not more than the maximum amount that can be deducted for federal income tax purposes. The Company expects to contribute approximately $3.5 million to $4.0 million in cash for its domestic pension plan in 2017. Contributions of $1.2 million and $2.4 million were made during the quarter and six months ended June 30, 2017, respectively. There were no contributions made during the quarter and six months ended June 30, 2016. The following is a summary of the components of net periodic benefit cost, which is recorded primarily within selling, product development and administrative expenses, for the domestic pension plan for the quarters and six months ended June 30, 2017 and 2016 : Quarter Ended Six Months Ended In thousands 2017 2016 2017 2016 Components of net periodic benefit cost Interest cost $ 514 $ 535 $ 1,029 $ 1,070 Expected return on assets (594 ) (605 ) (1,188 ) (1,210 ) Amortization of actuarial loss 273 233 546 467 Net periodic benefit cost $ 193 $ 163 $ 387 $ 327

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s effective tax rate was 28.7% and 32.0% for the quarters ended June 30, 2017 and 2016, and 23.9% and 32.5% for the six months ended June 30, 2017 and 2016, respectively. The difference in the Company’s effective tax rate for the quarter ended June 30, 2017 compared to the quarter ended June 30, 2016 was primarily related to a more favorable mix of income in lower taxed jurisdictions during the quarter ended June 30, 2017. The difference in the Company's effective tax rate for the six months ended June 30, 2017 compared to the six months ended June 30, 2016 was primarily related to tax benefits from stock compensation of $1.6 million for the six months ended June 30, 2017 compared to $0.3 million for the six months ended June 30, 2016 and a more favorable mix of income in lower taxed jurisdictions during the six months ended June 30, 2017. The Company and its subsidiaries file a consolidated federal income tax return, as well as returns required by various state and foreign jurisdictions. In the normal course of business, the Company is subject to examination by taxing authorities, including such major jurisdictions as the United States, France, Germany, China, the United Kingdom, the Netherlands and Canada. Within the next 12 months, it is reasonably possible that the Company could conclude certain federal income tax matters through the year ended December 31, 2014. If concluded, it is reasonably possible that net unrecognized benefits of up to $1.5 million may be recognized. With few exceptions, the Company is no longer subject to U.S. federal examinations for years before 2013, state and local examinations for years before 2012, and non-U.S. income tax examinations for years before 2003. The Company’s effective tax rates in future periods could be affected by earnings being higher or lower in countries where tax rates differ from the United States federal tax rate, the relative impact of permanent tax adjustments on higher or lower earnings from domestic operations, changes in net deferred tax asset valuation allowances, stock vesting, the completion of acquisitions or divestitures, changes in tax rates or tax laws and the completion of tax projects and audits.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share For the quarters and six months ended June 30, 2017 and 2016 , basic earnings per share were computed by dividing net income by the weighted average number of shares of common stock outstanding during the period. Unexercised stock options and unvested restricted shares are excluded from this calculation but are included in the diluted earnings per share calculation using the treasury stock method as long as their effect is not antidilutive. The following table provides a reconciliation of weighted-average shares used to determine basic and diluted earnings per share. Quarter Ended Six Months Ended In thousands 2017 2016 2017 2016 Basic average common shares outstanding 17,044 16,864 17,014 16,844 Effect of dilutive options and restricted stock awards 218 210 258 192 Diluted average common shares outstanding 17,262 17,074 17,272 17,036 For each of the quarters ended June 30, 2017 and 2016, stock options for 38,280 shares and 121,745 shares of Common Stock were not considered in computing diluted earnings per common share because they were antidilutive. For the six months ended June 30, 2017 and 2016, stock options for 38,280 shares and 199,375 shares of common stock, respectively, were not considered in computing diluted earnings per share because they were antidilutive.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Segment Information	Segment Information The Company’s reportable segments are Performance Materials, Technical Nonwovens, Thermal/Acoustical Metals, and Thermal/Acoustical Fibers. On December 31, 2016, the Company completed an acquisition of the nonwoven needle punch materials businesses, which include MGF Gutsche & Co GmbH KG, FRG and Gutsche Environmental Technology (Yixing) Co. Ltd., China, operating under Gutsche (“Gutsche”), a German based corporation. The Gutsche operations manufacture nonwoven needle punch materials and predominantly serve the industrial filtration and high performance nonwoven markets. The acquired businesses are included in the Company's Technical Nonwovens reporting segment. On July 7, 2016, the Company completed an acquisition of the nonwoven and coating materials businesses primarily operating under the Texel brand (“Texel”) from ADS, Inc. (“ADS”), a Canadian based corporation. The Texel operations manufacture nonwoven needle punch materials and predominantly serve the geosynthetic, liquid filtration, and other industrial markets. The acquired businesses are included in the Company's Technical Nonwovens reporting segment. Performance Materials Segment The Performance Materials segment includes filtration media solutions primarily for air, fluid power, and industrial applications (“Filtration”), thermal insulation solutions for building products, appliances, and energy and industrial markets (“Thermal Insulation”) and air and liquid life science applications (“Life Sciences Filtration”). Filtration products include LydAir® MG (Micro-Glass) Air Filtration Media, LydAir® MB (Melt Blown) Air Filtration Media, LydAir® SC (Synthetic Composite) Air Filtration Media, and Arioso™ Membrane Composite Media. These products constitute the critical media component of clean-air systems for applications in clean-space, commercial, industrial and residential HVAC, power generation, and industrial processes. Lydall has leveraged its extensive technical expertise and applications knowledge into a suite of media products covering the vast liquid filtration landscape across the engine and industrial fields. The LyPore® Liquid Filtration Media series address a variety of application needs in fluid power including hydraulic filters, air-water and air-oil coalescing, industrial fluid processes and diesel fuel filtration. Thermal Insulation products are high performance nonwoven veils, papers, mats and specialty composites for the building products, appliance, and energy and industrial markets. The Manniglas® Thermal Insulation brand is diverse in its product application ranging from high temperature seals and gaskets in ovens and ranges to specialty veils for HVAC and cavity wall insulation. The appLY® Mat Needled Glass Mats have been developed to expand Lydall’s high temperature technology portfolio for broad application into the appliance market and supplements the Lytherm® Insulation Media product brand, traditionally utilized in the industrial market for kilns and furnaces used in metal processing. Lydall’s Cryotherm® Super-Insulating Media, CRS-Wrap® Super-Insulating Media and Cryo-Lite™ Cryogenic Insulation products are industry standards for state-of-the-art cryogenic insulation designs used by manufacturers of cryogenic equipment for liquid gas storage, piping, and transportation. Life Sciences is comprised of products which have been designed to meet the stringent requirements of critical applications including biopharmaceutical pre-filtration and clarification, lateral flow diagnostic and analytical testing, respiratory protection, potable water filtration and high purity process filtration such as that found in food and beverage and medical applications. Lydall also offers ultra-high molecular weight polyethylene membranes under the Solupor® trade name. These specialty microporous membranes are utilized in various markets and applications including air and liquid filtration and transdermal drug delivery. Solupor® membranes incorporate a unique combination of high mechanical strength, chemical inertness, gamma stability and very high porosity making them ideal for many applications. Technical Nonwovens Segment The Technical Nonwovens segment primarily produces needle punch nonwoven solutions for myriad industries and applications. Products are manufactured and sold globally under the leading brands of Lydall Industrial Filtration, Southern Felt, Gutsche, and Texel. The Industrial Filtration products include nonwoven rolled-good felt media and filter bags used primarily in industrial air and liquid filtration applications. Nonwoven filter media is the most effective solution to satisfy increasing emission control regulations in a wide range of industries, including power, cement, steel, asphalt, incineration, mining, food, and pharmaceutical. The Advanced Materials products include nonwoven rolled-good media used in commercial applications and predominantly serves the geosynthetics, automotive, industrial,medical, and safety apparel markets. The automotive media is provided to Tier I/II suppliers and as well as the Company's Thermal/Acoustical Fibers segment. Technical Nonwovens segment products include air and liquid filtration media sold under the brand names Fiberlox® high performance filtration felts, Checkstatic™ conductive filtration felts, Microfelt® high efficiency filtration felts, Pleatlox® pleatable filtration felts, Ultratech™ PTFE filtration felts, Powertech® and Powerlox® power generation filtration felts, Microcap® high efficiency liquid filtration felts, Duotech membrane composite filtration felts, along with our porotex® family of high temperature filtration felts including microvel® and optivel® products. Technical Nonwovens Advanced Materials products are sold under the brand names Thermofit® thermo-formable products, Ecoduo® recycled content materials, Duotex® floor protection products, and Versaflex® composite molding materials. Technical Nonwovens also offers extensive finishing and coating capabilities which provide custom engineered properties tailored to meet the most demanding applications. The business leverages a wide range of fiber types and extensive technical capabilities to provide products that meet our customers’ needs across a variety of applications providing both high performance and durability. Thermal/Acoustical Metals Segment The Thermal/Acoustical Metals segment offers a full range of innovative engineered products tailored for the transportation sector to thermally shield sensitive components from high heat, improve exhaust gas treatment and lower harmful emissions as well as assist in the reduction of powertrain and road noise. Lydall products are found in the underbody (tunnel, fuel tank, rear muffler, spare tire) and underhood (outer dash, powertrain, catalytic converter, turbo charger, manifolds) of cars, trucks, SUVs, heavy duty trucks and recreational vehicles. Thermal/Acoustical Metals segment products are formed on production lines capable of efficiently combining multiple layers of metal and thermal - acoustical insulation media to provide an engineered thermal and acoustical shielding solution for an array of application areas in the global automotive and truck markets. The flux® product family in Thermal/Acoustical Metals includes several patented or IP-rich products that address applications which include: Direct Exhaust Mount heat shields, which are assembled to high temperature components like catalytic converters, turbochargers or exhaust manifolds using aluminized and stainless steel and high performance and high temperature heat insulating materials; Powertrain heat shields that absorb noise at the source and do not contribute to the engine's noise budget; and durable, thermally robust solutions for temperature sensitive plastic components such as fuel tanks that are in proximity to high temperature heat sources. Thermal/Acoustical Fibers Segment The Thermal/Acoustical Fibers segment offers innovative engineered products to assist primarily in noise vibration and harshness (NVH) abatement within the transportation sector. Lydall products are found in the interior (dash insulators, cabin flooring), underbody (wheel well, aerodynamic belly pan, fuel tank, exhaust) and under hood (engine compartment) of cars, trucks, SUVs, heavy duty trucks and recreational vehicles. Thermal/Acoustical Fibers segment products offer thermal and acoustical insulating solutions comprised of organic and inorganic fiber composites for the automotive and truck markets primarily in North America. Lydall’s dBCore® is a lightweight acoustical composite that emphasizes absorption principles over heavy-mass type systems. Lydall’s dBLyte® is a high-performance acoustical barrier with sound absorption and blocking properties and can be used throughout a vehicle’s interior to minimize intrusive noise from an engine compartment and road. Lydall’s ZeroClearance® is an innovative thermal solution that utilizes an adhesive backing for attachment and is used to protect vehicle components from excessive heat. Lydall’s specially engineered products provide a solution that provides weight reduction, superior noise suppression, and increased durability over conventional designs. Thermal/Acoustical Metals segment and Thermal/Acoustical Fibers segment operating results include allocations of certain costs shared between the segments. The tables below present net sales and operating income by segment for the quarters and six months ended June 30, 2017 and 2016 , and also a reconciliation of total segment net sales and operating income to total consolidated net sales and operating income. Consolidated net sales by segment: Quarter Ended Six Months Ended In thousands 2017 2016 2017 2016 Performance Materials Segment: Filtration $ 19,255 $ 18,657 $ 38,100 $ 35,816 Thermal Insulation 7,407 7,214 14,833 13,489 Life Sciences Filtration 2,639 4,095 5,119 7,044 Performance Materials Segment net sales 29,301 29,966 58,052 56,349 Technical Nonwovens Segment (1) : Industrial Filtration 36,325 20,128 70,538 43,722 Advanced Materials (2) 30,773 7,712 55,478 15,325 Technical Nonwovens net sales 67,098 27,840 126,016 59,047 Thermal/Acoustical Metals Segment: Metal parts 40,827 41,053 82,521 77,836 Tooling 2,558 4,192 5,144 9,406 Thermal/Acoustical Metals Segment net sales 43,385 45,245 87,665 87,242 Thermal/Acoustical Fibers Segment: Fiber parts 40,704 36,934 81,691 72,611 Tooling 2,795 3,234 3,180 3,418 Thermal/Acoustical Fibers Segment net sales 43,499 40,168 84,871 76,029 Eliminations and Other (2) (8,404 ) (5,984 ) (16,238 ) (11,732 ) Consolidated Net Sales $ 174,879 $ 137,235 $ 340,366 $ 266,935 Operating income by segment: Quarter Ended Six Months Ended In thousands 2017 2016 2017 2016 Performance Materials $ 3,864 $ 4,681 $ 5,453 $ 6,819 Technical Nonwovens (1) 6,535 3,219 11,203 7,145 Thermal/Acoustical Metals 3,174 4,082 5,617 7,639 Thermal/Acoustical Fibers 12,157 10,630 24,446 20,954 Corporate Office Expenses (5,886 ) (7,090 ) (11,920 ) (13,356 ) Consolidated Operating Income $ 19,844 $ 15,522 $ 34,799 $ 29,201 (1) The Technical Nonwovens segment reports results of Texel and Gutsche for the period following the dates of acquisition of July 7, 2016 and December 31, 2016, respectively. (2) Included in the Technical Nonwovens segment and Eliminations and Other is $6.8 million and $4.6 million in intercompany sales to the T/A Fibers segment for the quarters ended June 30, 2017 and 2016 , respectively, and $13.1 million and $9.1 million for the six months ended June 30, 2017 and 2016 , respectively.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company is subject to legal proceedings, claims, investigations and inquiries that arise in the ordinary course of business such as, but not limited to, actions with respect to commercial, intellectual property, employment, personal injury, and environmental matters. The Company believes that it has meritorious defenses against the claims currently asserted against it and intends to defend them vigorously. While the outcome of litigation is inherently uncertain and the Company cannot be sure that it will prevail in any of the cases, subject to the matter referenced below, the Company is not aware of any matters pending that are expected to have a material adverse effect on the Company’s business, financial position, results of operations or cash flows. Lydall Gerhardi GmbH Co. & KG (“Lydall Gerhardi”), an indirect wholly-owned subsidiary of the Company and part of Lydall’s Thermal/Acoustical Metals reporting segment, has been cooperating with the German Federal Cartel Office, Bundeskartellamt (“German Cartel Office”) since May 2014 in connection with an investigation relating to violations of German anti-trust laws by and among certain European automotive heat shield manufacturers, including Lydall Gerhardi. In December 2016, Lydall Gerhardi agreed in principle with the German Cartel Office to pay a settlement amount of €3.3 million (approximately $3.8 million U.S. Dollars as of June 30, 2017) to definitively conclude this matter. The Company recorded the expense of €3.3 million (approximately $3.5 million U.S. Dollars) in December 2016. In July 2017, Lydall Gerhardi entered into a formal settlement agreement with the German Cartel Office, definitively concluding this matter and will remit payment in the third quarter of 2017. Environmental Remediation The Company has elected to remediate environmental contamination discovered prior to the closing of the Texel acquisition at a certain property in the province of Quebec, Canada (“the Property”) that was acquired by Lydall. The Company records accruals for environmental costs when such losses are probable and reasonably estimable. The Company, through the engagement of a third-party environmental service firm, has been in the process of determining the final scope and timing of the remediation project and estimated the cost of the remediation project to range between $0.9 million and $1.5 million . Based upon this range of estimated remediation costs, the Company recorded an environmental liability of $0.9 million within other long-term liabilities on the Company's balance sheet at December 31, 2016. In July, 2017, the third-party environmental service firm completed its initial investigatory work and, based on information provided from the results of such work, the Company increased its environmental liability by $0.6 million at June 30, 2017. The environmental liability which reflects the most current estimate of $1.5 million (which remains fully offset as described below) is included within other long-term liabilities on the Company's balance sheet at June 30, 2017. During the six months ended June 30, 2017, the environmental liability has been reduced by $0.1 million , reflecting payments made to vendors, resulting in a balance of $1.4 million at June 30, 2017. Pursuant to the Share Purchase Agreement, ADS has agreed to indemnify the Company from all costs and liabilities associated with the contamination and remediation work, including the costs of preparation and approval of the remediation plan and other reports in relation therewith. This indemnity was secured by an environmental escrow account, which was established in the amount of $3.0 million Canadian Dollars ( $2.3 million U.S. Dollars as of June 30, 2017). Should the costs and liabilities exceed the environmental escrow amount, the Company also has access to the general indemnity escrow account, which was originally established in the amount of $14.0 million Canadian Dollars ( $10.8 million U.S. Dollars as of June 30, 2017), and based on the Share Purchase Agreement was reduced to approximately $7.0 million Canadian Dollars ( $5.4 million U.S. Dollars as of June 30, 2017) at June 30, 2017. Based on the foregoing, an indemnification asset of $0.9 million was also recorded in other assets at December 31, 2016 as the Company believed, and still believes collection from ADS is probable. This indemnification asset has been increased by $0.6 million to reflect the most current estimate of $1.5 million . The indemnification asset has been reduced by $0.1 million reflecting indemnification from ADS for payments made by the Company to its vendors during the six months ended June 30, 2017. The resulting indemnification asset balance is $1.4 million at June 30, 2017. The accrual for remediation costs will be adjusted as further information develops, estimates change and payments to vendors are made for remediation, with an off-setting adjustment to the indemnification asset from ADS if collection is deemed probable. In the fourth quarter of 2016, as part of a groundwater discharging permitting process, water samples collected from wells and process water basins at the Company’s Rochester New Hampshire manufacturing facility, within the Performance Materials segment, showed concentrations of Perfluorinated Compounds (“PFCs”) in excess of state ambient groundwater quality standards. In January 2017, the Company received a notification from the State of New Hampshire Department of Environmental Services (“NHDES”) naming Lydall Performance Materials, Inc. a responsible party with respect to the discharge of regulated contaminants and as such, is required to take action to investigate and remediate the impacts in accordance with standards established by the NHDES. The Company is conducting a site investigation, the scope of which has been reviewed by the NHDES, in order to assess the extent of potential soil and groundwater contamination and develop a remedial action, if necessary. Based on input received from NHDES in March 2017 with regard to the scope of the site investigation, the Company recorded $0.2 million of expense in the first quarter of 2017 associated with the expected costs of conducting this site investigation. There was no additional expense recorded in the second quarter of 2017 as the Company does not know the scope or extent of its future obligations, if any, that may arise from the site investigation and therefore is unable to estimate the cost of any future corrective action. Accordingly, the Company cannot assure that the costs of any future corrective action at this location would not have a material effect on the Company’s financial condition, results of operations or liquidity. Provisions for such matters are charged to expense when it is probable that a liability has been incurred and reasonable estimates of the liability can be made. Estimates of environmental liabilities are based on a variety of matters, including, but not limited to, the stage of investigation, the stage of the remedial design, evaluation of existing remediation technologies, and presently enacted laws and regulations. In future periods, a number of factors could significantly impact any estimates of environmental remediation costs.

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss)	Changes in Accumulated Other Comprehensive Income (Loss) The following table discloses the changes by classification within accumulated other comprehensive income (loss) for the periods ended June 30, 2017 and 2016 : In thousands Foreign Currency Translation Adjustment Defined Benefit Pension Adjustment Gains and Losses on Cash Flow Hedges Total Accumulated Other Comprehensive (Loss) Income Balance at December 31, 2015 $ (16,920 ) $ (17,665 ) $ — $ (34,585 ) Other Comprehensive loss (1,268 ) — — (1,268 ) Amounts reclassified from accumulated other comprehensive loss — 285 (a) — 285 Balance at June 30, 2016 (18,188 ) (17,380 ) — (35,568 ) Balance at December 31, 2016 (27,885 ) (20,065 ) — (47,950 ) Other Comprehensive loss 14,513 — (44 ) (b) 14,469 Amounts reclassified from accumulated other comprehensive loss — 344 (a) — 344 Balance at June 30, 2017 $ (13,372 ) $ (19,721 ) $ (44 ) $ (33,137 ) (a) Amount represents amortization of actuarial losses, a component of net periodic benefit cost. This amount was $0.3 million , net of $0.2 million tax benefit for the six months ended June 30, 2017 and 2016 . (b) Amount represents unrealized losses on the fair value of hedging activities, net of taxes for the six months ended June 30, 2017.

Basis of Financial Statement 23

Basis of Financial Statement Presentation (Policies)	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying Condensed Consolidated Financial Statements include the accounts of Lydall, Inc. and its subsidiaries. All financial information is unaudited for the interim periods reported. All significant intercompany transactions have been eliminated in the Condensed Consolidated Financial Statements. The Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The operating results of Texel and Gutsche have been included in the Consolidated Statements of Operations beginning on their respective dates of acquisition. As part of the acquisition of Texel, the Company acquired a fifty percent interest in a joint venture, Afitex Texel Geosynthetiques Inc., which is accounted for under the equity method of accounting. The year-end Condensed Consolidated Balance Sheet was derived from the December 31, 2016 audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. Management believes that all adjustments, which include only normal recurring adjustments necessary for a fair statement of the Company’s condensed consolidated financial position, results of operations and cash flows for the periods reported, have been included. For further information, refer to the audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 .
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)." The objective of this standard update is to remove inconsistent practices with regard to revenue recognition between US GAAP and IFRS. The standard intends to improve comparability of revenue recognition practices across entities, industries, jurisdictions and capital markets. ASU 2014-09 is effective for the Company’s interim and annual reporting periods beginning January 1, 2018, and is to be adopted using either a full retrospective or modified retrospective transition method with early adoption permitted for annual periods beginning after December 15, 2016. The Company anticipates adopting ASU 2014-09 under the modified retrospective transition method, with the cumulative effect of initially adopting this standard recognized through retained earnings at the date of adoption. The new standard requires new comprehensive qualitative and quantitative disclosures relating to the nature, amount, timing and uncertainty of revenue arising from contracts with customers, including significant judgments and estimates used when applying the guidance. The Company is implementing a project plan that includes a phased approach to implementing ASU 2014-09. During the remainder of 2017, the Company is completing the second phase which includes conversion activities, such as establishing policies, identifying system impacts, integration of the standard update into financial reporting processes and systems, and developing an understanding of the financial impact of this statement on the Company’s consolidated financial statements. The Company continues to assess potential impacts to all of its segments under the new standard and has identified a potential impact to the timing of revenue recognition across all segments. The Company currently generally recognizes revenue at a point in time, whereas the implementation of the new standard could result in certain revenue streams moving to an over-time revenue recognition model. The Company anticipates the transition to the new standard will result in changes to revenue recognition practices, including areas described above, but the Company will be unable to quantify that impact until the second phase of the project has been completed. Subsequent to the issuance of ASU No. 2014-09, the FASB has issued the following update; ASU No. 2016-20, “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers”. The amendments in this update affects the guidance contained within ASU 2014-09 and will be assessed as part of the Company's revenue recognition project plan. In July 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-11, “Inventory” (Topic 330): Simplifying the Measurement of Inventory." This ASU requires an entity to measure inventory at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Subsequent measurement is unchanged for inventory measured using last-in, first-out (“LIFO”) or the retail inventory method. This ASU is effective for fiscal years beginning after December 15, 2016. The adoption of this ASU did not have any impact on the Company’s consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)". This ASU requires entities that lease assets with lease terms of more than 12 months to recognize right-of-use assets and lease liabilities created by those leases on their balance sheets. This ASU will also require new qualitative and quantitative disclosures to help investors and other financial statement users better understand the amount, timing, and uncertainty of cash flows arising from leases. This ASU is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the method and impact the adoption of ASU 2016-02 will have on the Company’s consolidated financial statements and disclosures. In May 2017, the FASB issued ASU No. 2017-09, "Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting". This ASU requires an entity to apply modification accounting in Topic 718 when there are changes to the terms or conditions of a share-based payment award, unless the fair value, vesting conditions, and classification of the modified award are the same as the original award immediately before the original award is modified. This ASU is effective for fiscal years beginning after December 15, 2017, with early adoption permitted. The Company is currently evaluating the method and impact the adoption of ASU 2016-09 will have on the Company’s consolidated financial statements and disclosures.
Derivatives	The Company selectively uses financial instruments to manage market risk associated with exposure to fluctuations in interest rates. These financial exposures are monitored and managed by the Company as an integral part of its risk management program. The Company’s interest rate exposure is most sensitive to fluctuations in interest rates in the United States and Europe, which impact interest paid on its debt. The Company has debt with variable rates of interest based generally on LIBOR. From time to time, the Company may enter into interest rate swap agreements to manage interest rate risk. These instruments are designated as cash flow hedges and are recorded at fair value using Level 2 observable market inputs. Derivative instruments are recognized as either assets or liabilities on the balance sheet in either current or non-current other assets or other accrued liabilities or other long-term liabilities depending upon maturity and commitment. For derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods in which the hedge transaction affects earnings. Any ineffective portion, or amounts related to contracts that are not designated as hedges, are recorded directly to earnings. The Company's policy for classifying cash flows from derivatives is to report the cash flows consistent with the underlying hedged item. The Company does not use derivatives for speculative or trading purposes or to manage commodity exposures.

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the fair values of identifiable assets acquired and liabilities assumed at the date of the acquisitions: In thousands Texel Gutsche Cash and cash equivalents $ 1,610 $ 9,400 Accounts receivable 13,355 7,736 Inventories 17,525 6,417 Prepaid expenses and other current assets 2,469 1,125 Non-current environmental indemnification receivable (Note 14) 925 — Property, plant and equipment, net 31,525 7,969 Investment in joint venture 616 — Goodwill (Note 4) 28,655 19,759 Other intangible assets, net (Note 4) 22,887 15,622 Other long term assets — 1,545 Total assets acquired $ 119,567 $ 69,573 Current liabilities $ (8,520 ) $ (8,376 ) Long-term environmental remediation liability (Note 14) (925 ) — Deferred tax liabilities (7,413 ) (470 ) Other long-term liabilities — (2,742 ) Total liabilities assumed (16,858 ) (11,588 ) Net assets acquired $ 102,709 $ 57,985
Unaudited Pro Forma Operating Results	The following table reflects the actual operating results of the Company for the quarter and six months ended June 30, 2017 and the unaudited pro forma operating results of the Company for the quarter and six months ended June 30, 2016, which give effect to the acquisitions of Texel and Gutsche as if they had occurred on January 1, 2015. The pro forma information includes the historical financial results of the Company and the acquired businesses. The pro forma results are not necessarily indicative of the operating results that would have occurred had the acquisitions been effective January 1, 2015, nor are they intended to be indicative of results that may occur in the future. The pro forma information does not include the effects of any synergies related to the acquisitions. Quarter Ended Six Months Ended (Actual) (Unaudited Pro Forma) (Actual) (Unaudited Pro Forma) In thousands 2017 2016 2017 2016 Net sales $ 174,879 $ 173,834 $ 340,366 $ 329,982 Net income $ 13,125 $ 13,537 $ 24,794 $ 23,239 Earnings per share: Basic $ 0.77 $ 0.80 $ 1.46 $ 1.38 Diluted $ 0.76 $ 0.79 $ 1.44 $ 1.36

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2017
Inventory Disclosure [Abstract]
Inventories	Inventories as of June 30, 2017 and December 31, 2016 were as follows: In thousands June 30, December 31, Raw materials $ 31,131 $ 24,518 Work in process 28,185 17,161 Finished goods 24,524 25,360 83,840 67,039 Less: Progress billings (1,851 ) (893 ) Total inventories $ 81,989 $ 66,146

Goodwill and Other Intangible26

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2017
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 quarter ended June 30, 2017 were as follows: December 31, Currency translation adjustments Additions June 30, 2017 In thousands Performance Materials $ 12,777 $ 324 $ — $ 13,101 Technical Nonwovens 50,829 2,571 353 53,753 Total goodwill $ 63,606 $ 2,895 $ 353 $ 66,854
Schedule of Impaired Intangible Assets	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, 2017 and December 31, 2016 : June 30, 2017 December 31, 2016 In thousands Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Amortized intangible assets Customer Relationships $ 38,036 $ (2,822 ) $ 36,131 $ (1,284 ) Patents 4,319 (3,602 ) 4,028 (3,300 ) Technology 2,500 (560 ) 2,500 (477 ) Trade Names 4,131 (909 ) 3,912 (394 ) License Agreements 618 (618 ) 583 (583 ) Other 564 (384 ) 536 (205 ) Total amortized intangible assets $ 50,168 $ (8,895 ) $ 47,690 $ (6,243 )

Long-term Debt and Financing 27

Long-term Debt and Financing Arrangements (Tables)	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Schedule of Maturities of Long-term Debt	Total outstanding debt consists of: June 30, December 31, In thousands Effective Rate Maturity 2017 2016 Revolver Loan, due July 7, 2021 2.48 % 2021 $ 106,600 $ 126,600 Commerzbank Loan, due January 2, 2017 3.40 % 2017 — 400 Sparkasse Loan, due December 31, 2024 0.80 % 2024 — 1,030 Capital Leases 1.65% - 2.08% 2019 - 2020 698 745 107,298 128,775 Less portion due within one year (250 ) (634 ) Total long-term debt $ 107,048 $ 128,141

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Assets at Fair Value	The following table sets forth the fair value amounts of derivative instruments held by the Company: June 30, 2017 December 31, 2016 In thousands Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives Derivatives designated as hedging instruments: Interest rate contract $ — $ (69 ) $ — $ — Total derivatives $ — $ (69 ) $ — $ —
Schedule of Derivative Liabilities at Fair Value	The following table sets forth the fair value amounts of derivative instruments held by the Company: June 30, 2017 December 31, 2016 In thousands Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives Derivatives designated as hedging instruments: Interest rate contract $ — $ (69 ) $ — $ — Total derivatives $ — $ (69 ) $ — $ —
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)	The following table sets forth the loss, recorded in accumulated other comprehensive income (loss), net of tax, for the quarters and six months ended June 30, 2017 and 2016 for derivatives held by the Company and designated as hedging instruments: Quarter Ended Six Months Ended 2017 2016 2017 2016 Cash flow hedges: Interest rate contract $ (44 ) $ — $ (44 ) $ — $ (44 ) — $ (44 ) $ —

Equity Compensation Plans (Tabl

Equity Compensation Plans (Tables)	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary Of Outstanding And Exercisable Options	The following table is a summary of outstanding and exercisable options as of June 30, 2017 : In thousands except per share amounts and years Shares Weighted- Average Exercise Price Aggregate Intrinsic Value Outstanding at June 30, 2017 399 $ 26.34 $ 10,588 Exercisable at June 30, 2017 219 $ 16.49 $ 7,727 Unvested at June 30, 2017 179 $ 38.41 $ 2,860

Restructuring (Tables)

Restructuring (Tables)	6 Months Ended
	Jun. 30, 2017
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	Actual pre-tax expenses incurred and total estimated pre-tax expenses for the restructuring program by type are as follows: In thousands Severance and Related Expenses Contract Termination Expenses Facility Exit, Move and Set-up Expenses Total Expense incurred during quarter ended: June 30, 2017 74 185 34 293 Total pre-tax expense incurred $ 74 $ 185 $ 34 $ 293 Estimated remaining expense at June 30, 2017 1,600 50 3,050 4,700 Total estimated pre-tax expense $ 1,674 $ 235 $ 3,084 $ 4,993
Schedule of Restructuring Reserve by Type of Cost	Accrued restructuring costs were as follows at June 30, 2017: In thousands Total Balance as of March 31, 2017 $ — Pre-tax restructuring expenses 293 Cash paid — Balance as of June 30, 2017 $ 293

Employer Sponsored Benefit Pl31

Employer Sponsored Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2017
Retirement Benefits [Abstract]
Summary of The Components of Net Periodic Benefit Cost for the Domestic Pension Plan	The following is a summary of the components of net periodic benefit cost, which is recorded primarily within selling, product development and administrative expenses, for the domestic pension plan for the quarters and six months ended June 30, 2017 and 2016 : Quarter Ended Six Months Ended In thousands 2017 2016 2017 2016 Components of net periodic benefit cost Interest cost $ 514 $ 535 $ 1,029 $ 1,070 Expected return on assets (594 ) (605 ) (1,188 ) (1,210 ) Amortization of actuarial loss 273 233 546 467 Net periodic benefit cost $ 193 $ 163 $ 387 $ 327

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Reconciliation of Weighted Average Shares Used to Determine Basic and Diluted Earnings Per Share	The following table provides a reconciliation of weighted-average shares used to determine basic and diluted earnings per share. Quarter Ended Six Months Ended In thousands 2017 2016 2017 2016 Basic average common shares outstanding 17,044 16,864 17,014 16,844 Effect of dilutive options and restricted stock awards 218 210 258 192 Diluted average common shares outstanding 17,262 17,074 17,272 17,036

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Consolidated Net Sales by Segment	The tables below present net sales and operating income by segment for the quarters and six months ended June 30, 2017 and 2016 , and also a reconciliation of total segment net sales and operating income to total consolidated net sales and operating income. Consolidated net sales by segment: Quarter Ended Six Months Ended In thousands 2017 2016 2017 2016 Performance Materials Segment: Filtration $ 19,255 $ 18,657 $ 38,100 $ 35,816 Thermal Insulation 7,407 7,214 14,833 13,489 Life Sciences Filtration 2,639 4,095 5,119 7,044 Performance Materials Segment net sales 29,301 29,966 58,052 56,349 Technical Nonwovens Segment (1) : Industrial Filtration 36,325 20,128 70,538 43,722 Advanced Materials (2) 30,773 7,712 55,478 15,325 Technical Nonwovens net sales 67,098 27,840 126,016 59,047 Thermal/Acoustical Metals Segment: Metal parts 40,827 41,053 82,521 77,836 Tooling 2,558 4,192 5,144 9,406 Thermal/Acoustical Metals Segment net sales 43,385 45,245 87,665 87,242 Thermal/Acoustical Fibers Segment: Fiber parts 40,704 36,934 81,691 72,611 Tooling 2,795 3,234 3,180 3,418 Thermal/Acoustical Fibers Segment net sales 43,499 40,168 84,871 76,029 Eliminations and Other (2) (8,404 ) (5,984 ) (16,238 ) (11,732 ) Consolidated Net Sales $ 174,879 $ 137,235 $ 340,366 $ 266,935 (1) The Technical Nonwovens segment reports results of Texel and Gutsche for the period following the dates of acquisition of July 7, 2016 and December 31, 2016, respectively. (2) Included in the Technical Nonwovens segment and Eliminations and Other is $6.8 million and $4.6 million in intercompany sales to the T/A Fibers segment for the quarters ended June 30, 2017 and 2016 , respectively
Operating Income by Segment	Operating income by segment: Quarter Ended Six Months Ended In thousands 2017 2016 2017 2016 Performance Materials $ 3,864 $ 4,681 $ 5,453 $ 6,819 Technical Nonwovens (1) 6,535 3,219 11,203 7,145 Thermal/Acoustical Metals 3,174 4,082 5,617 7,639 Thermal/Acoustical Fibers 12,157 10,630 24,446 20,954 Corporate Office Expenses (5,886 ) (7,090 ) (11,920 ) (13,356 ) Consolidated Operating Income $ 19,844 $ 15,522 $ 34,799 $ 29,201 (1) The Technical Nonwovens segment reports results of Texel and Gutsche for the period following the dates of acquisition of July 7, 2016 and December 31, 2016, respectively. (2) Included in the Technical Nonwovens segment and Eliminations and Other is $6.8 million and $4.6 million in intercompany sales to the T/A Fibers segment for the quarters ended June 30, 2017 and 2016 , respectively, and $13.1 million and $9.1 million for the six months ended June 30, 2017 and 2016 , respectively.

Changes in Accumulated Other 34

Changes in Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes By Classification Within Accumulated Other Comprehensive Income (Loss)	The following table discloses the changes by classification within accumulated other comprehensive income (loss) for the periods ended June 30, 2017 and 2016 : In thousands Foreign Currency Translation Adjustment Defined Benefit Pension Adjustment Gains and Losses on Cash Flow Hedges Total Accumulated Other Comprehensive (Loss) Income Balance at December 31, 2015 $ (16,920 ) $ (17,665 ) $ — $ (34,585 ) Other Comprehensive loss (1,268 ) — — (1,268 ) Amounts reclassified from accumulated other comprehensive loss — 285 (a) — 285 Balance at June 30, 2016 (18,188 ) (17,380 ) — (35,568 ) Balance at December 31, 2016 (27,885 ) (20,065 ) — (47,950 ) Other Comprehensive loss 14,513 — (44 ) (b) 14,469 Amounts reclassified from accumulated other comprehensive loss — 344 (a) — 344 Balance at June 30, 2017 $ (13,372 ) $ (19,721 ) $ (44 ) $ (33,137 ) (a) Amount represents amortization of actuarial losses, a component of net periodic benefit cost. This amount was $0.3 million , net of $0.2 million tax benefit for the six months ended June 30, 2017 and 2016 . (b) Amount represents unrealized losses on the fair value of hedging activities, net of taxes for the six months ended June 30, 2017.

Basis of Financial Statement 35

Basis of Financial Statement Presentation (Details)	Jul. 07, 2016
Afitex Texel Geosynthetiques, Inc. | Texel
New Accounting Pronouncement, Early Adoption [Line Items]
Interest in joint venture as part of acquisition	50.00%

Acquisitions - Acquisitions Nar

Acquisitions - Acquisitions Narrative (Details) - USD ($)	Dec. 31, 2016	Jul. 07, 2016	Dec. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jul. 06, 2016
Business Acquisition [Line Items]
Amortization expense				$ 900,000		$ 2,000,000
Fair value step-up adjustments to inventory related to acquisitions				500,000		1,000,000
Net income				13,125,000	$ 10,813,000	24,794,000	$ 19,982,000
Acquisition related expenses						100,000
Revolving Credit Facility | Amended Credit Facility
Business Acquisition [Line Items]
Maximum borrowing capacity		$ 175,000,000
Revolving Credit Facility | Amended Credit Facility
Business Acquisition [Line Items]
Maximum borrowing capacity		$ 175,000,000		175,000,000		175,000,000		$ 100,000,000
Gutsche
Business Acquisition [Line Items]
Percentage of voting interest acquired	100.00%		100.00%
Purchase price	$ 57,600,000
Post closing working capital adjustment, estimated			$ 3,000,000
Post closing working capital adjustment				400,000
Purchase price including post closing adjustment				58,000,000
Purchase price borrowings	31,600,000		31,600,000
Investment in joint venture	$ 0		$ 0
Gutsche | Subsidiaries
Business Acquisition [Line Items]
Net sales of acquiree since acquisition date				12,100,000		23,300,000
Operating income of acquiree since acquisition date				600,000		900,000
Purchase accounting inventory fair value step-up adjustment				200,000		600,000
Pre-tax restructuring expenses				200,000		200,000
Texel
Business Acquisition [Line Items]
Percentage of voting interest acquired		100.00%
Purchase price borrowings		$ 85,000,000
Net sales of acquiree since acquisition date				20,800,000		35,900,000
Operating income of acquiree since acquisition date				1,500,000		2,000,000
Purchase accounting inventory fair value step-up adjustment				$ 300,000		$ 500,000
Payments to acquire business		102,700,000
Investment in joint venture		$ 616,000
Reclassification from cost of sales					500,000		800,000
Reclassification to net sales					500,000		800,000
Texel | Afitex Texel Geosynthetiques, Inc.
Business Acquisition [Line Items]
Interest in joint venture as part of acquisition		50.00%
Investment in joint venture		$ 600,000
Texel Brand and Gutsche
Business Acquisition [Line Items]
Amortization expense					1,200,000		2,300,000
Depreciation expense					500,000		1,000,000
Interest expense					500,000		900,000
Texel Brand and Gutsche | Acquisition-related Costs
Business Acquisition [Line Items]
Net income					$ 1,500,000		$ 2,100,000

Acquisitions - Identifiable Ass

Acquisitions - Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jul. 07, 2016
Business Acquisition [Line Items]
Goodwill (Note 4)	$ 66,854	$ 63,606
Texel
Business Acquisition [Line Items]
Cash and cash equivalents			$ 1,610
Accounts receivable			13,355
Inventories			17,525
Prepaid expenses and other current assets			2,469
Non-current environmental indemnification receivable (Note 14)			925
Property, plant and equipment, net			31,525
Investment in joint venture			616
Goodwill (Note 4)			28,655
Other intangible assets, net (Note 4)			22,887
Other long term assets			0
Total assets acquired			119,567
Current liabilities			(8,520)
Long-term environmental remediation liability (Note 14)			(925)
Deferred tax liabilities			(7,413)
Other long-term liabilities			0
Total liabilities assumed			(16,858)
Net assets acquired			$ 102,709
Gutsche
Business Acquisition [Line Items]
Cash and cash equivalents		9,400
Accounts receivable		7,736
Inventories		6,417
Prepaid expenses and other current assets		1,125
Non-current environmental indemnification receivable (Note 14)		0
Property, plant and equipment, net		7,969
Investment in joint venture		0
Goodwill (Note 4)		19,759
Other intangible assets, net (Note 4)		15,622
Other long term assets		1,545
Total assets acquired		69,573
Current liabilities		(8,376)
Long-term environmental remediation liability (Note 14)		0
Deferred tax liabilities		(470)
Other long-term liabilities		(2,742)
Total liabilities assumed		(11,588)
Net assets acquired		$ 57,985

Acquisitions - Unaudited Pro Fo

Acquisitions - Unaudited Pro Forma Operating Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Business Combinations [Abstract]
Net sales	$ 174,879	$ 137,235	$ 340,366	$ 266,935
Net income	$ 13,125	$ 10,813	$ 24,794	$ 19,982
Earnings per share:
Basic (in dollars per share)	$ 0.77	$ 0.64	$ 1.46	$ 1.19
Diluted (in dollars per share)	$ 0.76	$ 0.63	$ 1.44	$ 1.17
Business Acquisition, Pro Forma Information [Abstract]
Net sales		$ 173,834		$ 329,982
Net income		$ 13,537		$ 23,239
Earnings per share:
Basic (in dollars per share)		$ 0.80		$ 1.38
Diluted (in dollars per share)		$ 0.79		$ 1.36

Inventories (Detail)

Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Inventory, Net [Abstract]
Raw materials	$ 31,131	$ 24,518
Work in process	28,185	17,161
Finished goods	24,524	25,360
Gross inventory total	83,840	67,039
Less: Progress billings	(1,851)	(893)
Total inventories	$ 81,989	$ 66,146

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Gross tooling inventory	$ 18.3	$ 10.3
Tooling inventory net of progress billings	$ 16.4	$ 9.4

Goodwill and Other Intangible41

Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Goodwill [Roll Forward]
Beginning Balance, December 31, 2016		$ 63,606
Currency translation adjustments		2,895
Additions		353
Ending Balance, June 30, 2017	$ 66,854	66,854
Gutsche
Goodwill [Roll Forward]
Beginning Balance, December 31, 2016		19,759
Performance Materials
Goodwill [Roll Forward]
Beginning Balance, December 31, 2016		12,777
Currency translation adjustments		324
Additions		0
Ending Balance, June 30, 2017	13,101	13,101
Technical Nonwovens
Goodwill [Roll Forward]
Beginning Balance, December 31, 2016		50,829
Currency translation adjustments		2,571
Additions		353
Ending Balance, June 30, 2017	53,753	$ 53,753
Technical Nonwovens | Gutsche
Goodwill [Roll Forward]
Additional goodwill as a result of final post-closing adjustment	$ 400

Goodwill and Other Intangible42

Goodwill and Other Intangible Assets - Amortization of the Company's Acquired Intangible Assets other than Goodwill (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Amortized intangible assets
Gross Carrying Amount	$ 50,168	$ 47,690
Accumulated Amortization	(8,895)	(6,243)
Customer Relationships
Amortized intangible assets
Gross Carrying Amount	38,036	36,131
Accumulated Amortization	(2,822)	(1,284)
Patents
Amortized intangible assets
Gross Carrying Amount	4,319	4,028
Accumulated Amortization	(3,602)	(3,300)
Technology
Amortized intangible assets
Gross Carrying Amount	2,500	2,500
Accumulated Amortization	(560)	(477)
Trade Names
Amortized intangible assets
Gross Carrying Amount	4,131	3,912
Accumulated Amortization	(909)	(394)
License Agreements
Amortized intangible assets
Gross Carrying Amount	618	583
Accumulated Amortization	(618)	(583)
Other
Amortized intangible assets
Gross Carrying Amount	564	536
Accumulated Amortization	$ (384)	$ (205)

Long-term Debt and Financing 43

Long-term Debt and Financing Arrangements - Additional Information (Detail)	Jul. 07, 2016USD ($)	Apr. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2016	Jul. 06, 2016USD ($)
Debt Instrument [Line Items]
Debt, weighted average interest rate percentage			2.00%	2.00%	1.40%
Interest Rate Swap
Debt Instrument [Line Items]
Derivative agreement term		3 years
Derivative notional amount		$ 60,000,000
Derivative, fixed rate		1.58%
Quarterly reduction to notional amount			$ 5,000,000
Amended Credit Facility
Debt Instrument [Line Items]
Standby letters of credit, outstanding			3,800,000	$ 3,800,000
Revolving Credit Facility | Amended Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 175,000,000		$ 175,000,000	$ 175,000,000		$ 100,000,000
Maximum borrowing capacity possible value of increase (not to exceed)	$ 50,000,000
Credit facility fixed charge coverage ratio (not less than)				2
Required consolidated leverage ratio as of end of each fiscal quarter (no greater than)			3	3
Minimum required Consolidated EBITDA for preceding 12 month period				$ 30,000,000
Line of credit facility, remaining borrowing capacity			$ 64,600,000	64,600,000
Borrowings outstanding			106,600,000	$ 106,600,000
Revolving Credit Facility | Amended Credit Facility | Minimum
Debt Instrument [Line Items]
Quarterly commitment fee percentage				0.175%
Revolving Credit Facility | Amended Credit Facility | Maximum
Debt Instrument [Line Items]
Quarterly commitment fee percentage				0.30%
Revolving Credit Facility | Amended Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate				0.15%
Revolving Credit Facility | Amended Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%
Revolving Credit Facility | Amended Credit Facility | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Revolving Credit Facility | Amended Credit Facility | Eurocurrency Rate
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%
Revolving Credit Facility | Amended Credit Facility | Eurocurrency Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate				0.75%
Revolving Credit Facility | Amended Credit Facility | Eurocurrency Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate				1.75%
Foreign Credit Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity			11,200,000	$ 11,200,000
Borrowings outstanding			100,000	100,000
Standby letters of credit, outstanding			$ 2,500,000	$ 2,500,000

Long-term Debt and Financing 44

Long-term Debt and Financing Arrangements - Schedule of Maturities of Long-term Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt	$ 107,298	$ 128,775
Less portion due within one year	(250)	(634)
Long-term Debt	$ 107,048	128,141
Foreign Credit Facility | Commerzbank Loan, due January 2, 2017
Debt Instrument [Line Items]
Effective Rate	3.40%
Long-term debt	$ 0	400
Foreign Credit Facility | Sparkasse Loan, due December 31, 2024
Debt Instrument [Line Items]
Effective Rate	0.80%
Long-term debt	$ 0	1,030
Capital Lease Obligations | Minimum
Debt Instrument [Line Items]
Effective Rate	1.65%
Capital Lease Obligations | Maximum
Debt Instrument [Line Items]
Effective Rate	2.08%
Capital Lease Obligations | Capital Leases
Debt Instrument [Line Items]
Long-term debt	$ 698	745
Revolving Credit Facility | Revolver Loan, due July 7, 2021
Debt Instrument [Line Items]
Effective Rate	2.48%
Long-term debt	$ 106,600	$ 126,600

Derivatives - Additional Inform

Derivatives - Additional Information (Details) - Interest Rate Swap - USD ($)	1 Months Ended	3 Months Ended
	Apr. 30, 2017	Jun. 30, 2017
Derivative [Line Items]
Derivative agreement term	3 years
Derivative notional amount	$ 60,000,000
Derivative, fixed rate	1.58%
Quarterly reduction to notional amount		$ 5,000,000

Derivatives - Fair Value Amount

Derivatives - Fair Value Amounts of Derivative Instruments (Details) - Derivatives designated as hedging instruments - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 0	$ 0
Liability Derivatives	(69)	0
Interest rate contract
Derivatives, Fair Value [Line Items]
Asset Derivatives	0	0
Liability Derivatives	$ (69)	$ 0

Derivatives - Loss Recorded in

Derivatives - Loss Recorded in Accumulated Other Comprehensive Income (Loss) (Details) - Derivatives designated as hedging instruments - Cash flow hedges - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income	$ (44)	$ 0	$ (44)	$ 0
Interest rate contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income	$ (44)	$ 0	$ (44)	$ 0

Equity Compensation Plans - Add

Equity Compensation Plans - Additional Information (Detail) - USD ($)	Apr. 27, 2012	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 1,100,000	$ 900,000		$ 2,300,000	$ 2,100,000
Equity compensation costs capitalized as part of inventory					$ 0
Stock options granted (shares)		0	0		0	18,300
Stock options exercised (shares)		16,300	9,313		28,464	27,639
Cash received from exercise of stock option		$ 200,000	$ 100,000		$ 300,000	$ 400,000
Number of options exercised, intrinsic value		700,000	$ 300,000		1,200,000	600,000
Intrinsic value of stock options exercised, tax benefit		100,000			$ 300,000	$ 100,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, term					10 years
Total unrecognized compensation cost		2,300,000			$ 2,300,000
Weighted average expected amortization period					2 years 7 months 10 days
Employee Stock Option | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period					3 years
Employee Stock Option | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period					4 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost		$ 4,400,000			$ 4,400,000
Weighted average expected amortization period					2 years
Unvested restricted stock awards (shares)		193,925			193,925
Time Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (shares)		0	0	7,930	0
Restricted shares vested (shares)		0	0	8,129	9,288
Time Based Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period					2 years
Time Based Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period					4 years
Performance Based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (shares)		0	0
Restricted shares vested (shares)		0	0	7,380	108,600	65,087
Performance Based Restricted Stock Awards | Earnings Target in 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (shares)					18,100
Stock Option Plan 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share options and restricted shares authorized (shares)	1,750,000
Additional shares authorized under the plan (shares)	1,200,000

Equity Compensation Plans (Deta

Equity Compensation Plans (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	Jun. 30, 2017USD ($)$ / sharesshares
Shares
Outstanding at June 30, 2017(shares) | shares	399
Exercisable at June 30, 2017 (shares) | shares	219
Unvested at June 30, 2017 (shares) | shares	179
Weighted-Average Exercise Price (in dollars per share)
Outstanding at June 30, 2017 (in dollars per share) | $ / shares	$ 26.34
Exercisable at June 30, 2017 (in dollars per share) | $ / shares	16.49
Unvested at June 30 2017 (in dollars per share) | $ / shares	$ 38.41
Aggregate Intrinsic Value
Outstanding at June 30, 2017 | $	$ 10,588
Exercisable at June 30, 2017 | $	7,727
Unvested at June 30, 2017 | $	$ 2,860

Stock Repurchases (Details)

Stock Repurchases (Details) $ in Millions	6 Months Ended
	Jun. 30, 2017USD ($)shares
Equity [Abstract]
Stock repurchased during period (shares) | shares	42,308
Aggregate purchase price of shares repurchased | $	$ 2.5

Restructuring - Additional Info

Restructuring - Additional Information (Details) - Technical Nonwovens - USD ($) $ in Thousands	3 Months Ended	6 Months Ended		9 Months Ended
	Jun. 30, 2017	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2017	Apr. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring, total expected costs	$ 4,993		$ 4,993
Restructuring, expected costs resulting in future cash expenditures					$ 4,800
Estimated remaining expense at June 30, 2017	4,700		4,700
Cash paid	0
Pre-tax restructuring expenses	$ 293		300
Forecast
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		$ 2,000
Cash paid				$ 3,500
Selling, Product Development and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring expenses			200
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring expenses			$ 100

Restructuring - Actual and Esti

Restructuring - Actual and Estimated Pre-tax Expenses (Details) - Technical Nonwovens $ in Thousands	Jun. 30, 2017USD ($)
Restructuring Cost and Reserve [Line Items]
Total pre-tax expense incurred	$ 293
Estimated remaining expense at June 30, 2017	4,700
Total estimated pre-tax expense	4,993
Severance and Related Expenses
Restructuring Cost and Reserve [Line Items]
Total pre-tax expense incurred	74
Estimated remaining expense at June 30, 2017	1,600
Total estimated pre-tax expense	1,674
Contract Termination Expenses
Restructuring Cost and Reserve [Line Items]
Total pre-tax expense incurred	185
Estimated remaining expense at June 30, 2017	50
Total estimated pre-tax expense	235
Facility Exit, Move and Set-up Expenses
Restructuring Cost and Reserve [Line Items]
Total pre-tax expense incurred	34
Estimated remaining expense at June 30, 2017	3,050
Total estimated pre-tax expense	$ 3,084

Restructuring - Accrued Restruc

Restructuring - Accrued Restructuring Costs (Details) - Technical Nonwovens - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Restructuring Reserve [Roll Forward]
Balance as of March 31, 2017	$ 0
Pre-tax restructuring expenses	293	$ 300
Cash paid	0
Balance as of June 30, 2017	$ 293	$ 293

Employer Sponsored Benefit Pl54

Employer Sponsored Benefit Plans - Additional Information (Detail) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2017USD ($)
Defined Benefit Plan Disclosure [Line Items]
Contributions made by company to domestic pension plan	$ 1.2	$ 2.4
Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected domestic pension plan cash contribution in current year	3.5	3.5
Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected domestic pension plan cash contribution in current year	$ 4	$ 4

Employer Sponsored Benefit Pl55

Employer Sponsored Benefit Plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Components of net periodic benefit cost
Interest cost	$ 514	$ 535	$ 1,029	$ 1,070
Expected return on assets	(594)	(605)	(1,188)	(1,210)
Amortization of actuarial loss	273	233	546	467
Net periodic benefit cost	$ 193	$ 163	$ 387	$ 327

Income Taxes (Detail)

Income Taxes (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Effective tax rate for income from continuing operations	28.70%	32.00%	23.90%	32.50%
Tax benefits from stock compensation			$ 1,600,000	$ 300,000
Settlement with Taxing Authority
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Reasonably expected net unrecognized benefits may be recognized	$ 1,500,000		$ 1,500,000

Earnings Per Share (Detail)

Earnings Per Share (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Basic average common shares outstanding (shares)	17,044	16,864	17,014	16,844
Effect of dilutive options and restricted stock awards (shares)	218	210	258	192
Diluted average common shares outstanding (shares)	17,262	17,074	17,272	17,036

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Shares excluded from computation of diluted earnings per share (shares)	38,280	121,745	38,280	199,375

Segment Information - Consolida

Segment Information - Consolidated Net Sales by Segment (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		$ 174,879	$ 137,235	$ 340,366	$ 266,935
Operating Segments | Performance Materials
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		29,301	29,966	58,052	56,349
Operating Segments | Performance Materials | Filtration
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		19,255	18,657	38,100	35,816
Operating Segments | Performance Materials | Thermal Insulation
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		7,407	7,214	14,833	13,489
Operating Segments | Performance Materials | Life Sciences Filtration
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		2,639	4,095	5,119	7,044
Operating Segments | Technical Nonwovens
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	[1]	67,098	27,840	126,016	59,047
Operating Segments | Technical Nonwovens | Industrial Filtration
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	[1]	36,325	20,128	70,538	43,722
Operating Segments | Technical Nonwovens | Advanced Materials
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	[1],[2]	30,773	7,712	55,478	15,325
Operating Segments | Thermal/Acoustical Metals
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		43,385	45,245	87,665	87,242
Operating Segments | Thermal/Acoustical Metals | Metal parts
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		40,827	41,053	82,521	77,836
Operating Segments | Thermal/Acoustical Metals | Tooling
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		2,558	4,192	5,144	9,406
Operating Segments | Thermal/Acoustical Fibers
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		43,499	40,168	84,871	76,029
Operating Segments | Thermal/Acoustical Fibers | Fiber parts
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		40,704	36,934	81,691	72,611
Operating Segments | Thermal/Acoustical Fibers | Tooling
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales		2,795	3,234	3,180	3,418
Eliminations and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	[2]	$ (8,404)	$ (5,984)	$ (16,238)	$ (11,732)
[1]	The Technical Nonwovens segment reports results of Texel and Gutsche for the period following the dates of acquisition of July 7, 2016 and December 31, 2016, respectively.
[2]	Included in the Technical Nonwovens segment and Eliminations and Other is $6.8 million and $4.6 million in intercompany sales to the T/A Fibers segment for the quarters ended June 30, 2017 and 2016, respectively

Segment Information - Operating

Segment Information - Operating Income by Segment (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated Operating Income		$ 19,844	$ 15,522	$ 34,799	$ 29,201
Operating Segments | Performance Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated Operating Income		3,864	4,681	5,453	6,819
Operating Segments | Technical Nonwovens
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated Operating Income	[1]	6,535	3,219	11,203	7,145
Operating Segments | Thermal/Acoustical Metals
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated Operating Income		3,174	4,082	5,617	7,639
Operating Segments | Thermal/Acoustical Fibers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated Operating Income		12,157	10,630	24,446	20,954
Corporate Office Expenses
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated Operating Income		$ (5,886)	$ (7,090)	$ (11,920)	$ (13,356)
[1]	The Technical Nonwovens segment reports results of Texel and Gutsche for the period following the dates of acquisition of July 7, 2016 and December 31, 2016, respectively.

Segment Information - Narrative

Segment Information - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Technical Nonwovens
Segment Reporting Information [Line Items]
Intercompany revenue	$ 6.8	$ 4.6	$ 13.1	$ 9.1

Commitments and Contingencies (

Commitments and Contingencies (Details) € in Millions, CAD in Millions, $ in Millions	1 Months Ended		3 Months Ended	6 Months Ended
	Dec. 31, 2016EUR (€)	Dec. 31, 2016USD ($)	Mar. 31, 2017USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2017CAD	Jul. 07, 2016USD ($)
Rochester, New Hampshire
Loss Contingencies [Line Items]
Expense associated with expected costs of site investigation			$ 0.2
Texel | Quebec, Canada
Loss Contingencies [Line Items]
Indemnification assets, minimum estimated outcome						$ 0.9
Indemnification assets, maximum estimated outcome						$ 1.5
Environment remediation indemnity secured by environmental escrow account				$ 2.3	CAD 3
Environmental remediation indemnity secured by general escrow account				10.8	14
Environmental remediation indemnity secured by general escrow account, reduced amount after share purchase agreement				5.4	CAD 7
Texel | Quebec, Canada | Environmental Contamination
Loss Contingencies [Line Items]
Accrual for environmental liability		$ 0.9		1.4
Accrual for environmental liability, revision of estimate				0.6
Accrual for environmental liability, including revision (fully offset)				1.5
Reduction to accrual for environmental liability, payments				0.1
Lydall Gerhardi | German Federal Cartel Office, Bundeskartellamt
Loss Contingencies [Line Items]
Litigation settlement amount awarded to other party	€ 3.3			$ 3.8
Litigation settlement expense	€ 3.3	$ 3.5

Changes in Accumulated Other 63

Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2017	Jun. 30, 2017		Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			$ 273,456
Other Comprehensive loss			14,469		$ (1,268)
Amounts reclassified from accumulated other comprehensive loss			344		285
Ending balance		$ 313,166	313,166
Loss reclassified from AOCI for defined benefit pension plans		300			300
Tax benefit reclassified from AOCI for defined benefit pension plans		200			200
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(27,885)		(16,920)
Other Comprehensive loss			14,513		(1,268)
Amounts reclassified from accumulated other comprehensive loss			0		0
Ending balance		(13,372)	(13,372)		(18,188)
Defined Benefit Pension Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(20,065)		(17,665)
Other Comprehensive loss			0		0
Amounts reclassified from accumulated other comprehensive loss	[1]		344		285
Ending balance		(19,721)	(19,721)		(17,380)
Gains and Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			0		0
Other Comprehensive loss			(44)	[2]	0
Amounts reclassified from accumulated other comprehensive loss			0		0
Ending balance		(44)	(44)		0
Total Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(47,950)		(34,585)
Ending balance		$ (33,137)	$ (33,137)		$ (35,568)
[1]	Amount represents amortization of actuarial losses, a component of net periodic benefit cost. This amount was $0.3 million, net of $0.2 million tax benefit for the six months ended June 30, 2017 and 2016.
[2]	Amount represents unrealized losses on the fair value of hedging activities, net of taxes for the six months ended June 30, 2017.