Lydall (LDL) 10-Q 30 Jul 19 2019 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2019	Jul. 15, 2019
Cover page.
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000060977
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
Document Transition Report	false
Entity File Number	1-7665
Entity Registrant Name	LYDALL INC /DE/
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	06-0865505
Entity Address, Address Line One	One Colonial Road
Entity Address, City or Town	Manchester
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06042
City Area Code	860
Local Phone Number	646-1233
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	LDL
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Small Business	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		17,534,626

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net sales	$ 220,811	$ 186,413	$ 438,836	$ 378,073
Cost of sales	175,536	150,286	351,505	302,439
Gross profit	45,275	36,127	87,331	75,634
Selling, product development and administrative expenses	32,096	23,878	65,102	49,349
Operating income	13,179	12,249	22,229	26,285
Pension plan settlement expense	25,515	0	25,515	0
Interest expense	3,731	572	7,359	1,112
Other income, net	(873)	(368)	(474)	(53)
(Loss) income before income taxes	(15,194)	12,045	(10,171)	25,226
Income tax (benefit) expense	(8,199)	1,655	(7,093)	3,778
Income from equity method investment	(49)	(60)	(22)	(56)
Net (loss) income	$ (6,946)	$ 10,450	$ (3,056)	$ 21,504
Earnings (loss) per share:
Basic (USD per share)	$ (0.40)	$ 0.61	$ (0.18)	$ 1.25
Diluted (USD per share)	$ (0.40)	$ 0.60	$ (0.18)	$ 1.24
Weighted average number of common shares outstanding:
Basic (shares)	17,267	17,196	17,260	17,178
Diluted (shares)	17,267	17,335	17,260	17,334

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (6,946)	$ 10,450	$ (3,056)	$ 21,504
Other comprehensive income (loss):
Foreign currency translation adjustments	2,457	(11,149)	2,330	(8,604)
Pension liability adjustment, net of tax	143	199	358	397
Unrealized (loss) gain on hedging activities, net of tax	(1,351)	(27)	(2,026)	75
Comprehensive (loss) income	$ (5,697)	$ (527)	$ (2,394)	$ 13,372

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 43,416	$ 49,237
Accounts receivable, less allowances (2019 - $2,087; 2018 - $1,440)	147,392	144,938
Contract assets	21,566	23,040
Inventories	88,232	84,465
Taxes receivable	2,745	2,912
Prepaid expenses	5,190	4,707
Other current assets	8,474	7,779
Total current assets	317,015	317,078
Property, plant and equipment, at cost	473,943	458,075
Accumulated depreciation	(255,736)	(244,706)
Net, property, plant and equipment	218,207	213,369
Operating lease right-of-use assets	27,070	0
Goodwill	197,796	196,963
Other intangible assets, net	126,696	136,604
Other assets, net	9,650	8,672
Total assets	896,434	872,686
Current liabilities:
Current portion of long-term debt	10,001	10,172
Accounts payable	81,053	73,265
Accrued payroll and other compensation	15,985	16,621
Deferred revenue	3,446	6,990
Other accrued liabilities	21,382	14,298
Total current liabilities	131,867	121,346
Long-term debt	289,673	314,641
Long-term operating lease liabilities	22,006	0
Deferred tax liabilities	37,640	39,265
Benefit plan liabilities	22,849	22,795
Other long-term liabilities	5,294	5,364
Commitments and Contingencies (Note 16)
Stockholders’ equity:
Preferred stock	0	0
Common stock	253	253
Capital in excess of par value	92,297	90,851
Retained earnings	408,086	411,325
Accumulated other comprehensive loss	(23,007)	(42,685)
Treasury stock, at cost	(90,524)	(90,469)
Total stockholders’ equity	387,105	369,275
Total liabilities and stockholders’ equity	$ 896,434	$ 872,686

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowances of accounts receivable	$ 2,087	$ 1,440

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net (loss) income	$ (3,056)	$ 21,504
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Gain on divestiture	(1,459)	0
Depreciation and amortization	24,001	14,248
Deferred income taxes	(12,358)	1,165
Pension plan settlement expense	25,515	0
Stock-based compensation	1,475	2,580
Income from equity method investment	(22)	(56)
Changes in operating assets and liabilities:
Accounts receivable	(1,988)	(11,934)
Contract assets	1,231	(7,594)
Inventories	(4,660)	(15,643)
Accounts payable	10,227	7,406
Accrued payroll and other compensation	3,000	(2,408)
Accrued taxes	308	1,184
Other, net	(5,995)	(2,478)
Net cash provided by operating activities	36,219	7,974
Cash flows from investing activities:
Capital expenditures	(20,287)	(16,355)
Proceeds from divestiture	2,298	0
Proceeds from the sale of property, plant and equipment	295	217
Business acquisitions, net of cash acquired	869	0
Net cash used for investing activities	(16,825)	(16,138)
Cash flows from financing activities:
Debt repayments	(25,169)	(126)
Common stock issued	0	666
Common stock repurchased	(43)	(823)
Net cash used for financing activities	(25,212)	(283)
Effect of exchange rate changes on cash	(3)	(815)
Decrease in cash and cash equivalents	(5,821)	(9,262)
Cash and cash equivalents at beginning of period	49,237	59,875
Cash and cash equivalents at end of period	$ 43,416	$ 50,613

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Statement of Cash Flows [Abstract]
Non-cash capital expenditures	$ 2.3	$ 2

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Balance at beginning of period (shares) at Dec. 31, 2017		25,018
Balance at beginning of period at Dec. 31, 2017	$ 353,396	$ 250	$ 88,006	$ 374,783	$ (20,148)	$ (89,495)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	11,054			11,054
Other comprehensive income (loss), net of tax	2,845				2,845
Stock repurchased	(823)					(823)
Stock issued (canceled) under employee plans (shares)		50
Stock issued (canceled) under employee plans	667	$ 1	666
Stock-based compensation expense	1,096		1,096
Balance at end of period (shares) at Mar. 31, 2018		25,068
Balance at end of period at Mar. 31, 2018	369,833	$ 251	89,768	387,435	(17,303)	(90,318)
Balance at beginning of period (shares) at Dec. 31, 2017		25,018
Balance at beginning of period at Dec. 31, 2017	353,396	$ 250	88,006	374,783	(20,148)	(89,495)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	21,504
Balance at end of period (shares) at Jun. 30, 2018		25,070
Balance at end of period at Jun. 30, 2018	370,715	$ 251	91,177	397,885	(28,280)	(90,318)
Balance at beginning of period (shares) at Mar. 31, 2018		25,068
Balance at beginning of period at Mar. 31, 2018	369,833	$ 251	89,768	387,435	(17,303)	(90,318)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	10,450			10,450
Other comprehensive income (loss), net of tax	(10,977)				(10,977)
Stock issued (canceled) under employee plans (shares)		2
Stock issued (canceled) under employee plans	0
Stock-based compensation expense	1,275		1,275
Stock issued to directors	134		134
Balance at end of period (shares) at Jun. 30, 2018		25,070
Balance at end of period at Jun. 30, 2018	370,715	$ 251	91,177	397,885	(28,280)	(90,318)
Balance at beginning of period (shares) at Dec. 31, 2018		25,254
Balance at beginning of period at Dec. 31, 2018	369,275	$ 253	90,851	411,325	(42,685)	(90,469)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	3,890			3,890
Other comprehensive income (loss), net of tax	(587)				(587)
Stock repurchased	(42)					(42)
Stock issued (canceled) under employee plans (shares)		(26)
Stock issued (canceled) under employee plans	(1)	$ (1)
Stock-based compensation expense	862		862
Balance at end of period (shares) at Mar. 31, 2019		25,228
Balance at end of period at Mar. 31, 2019	373,214	$ 252	91,713	415,032	(43,272)	(90,511)
Balance at beginning of period (shares) at Dec. 31, 2018		25,254
Balance at beginning of period at Dec. 31, 2018	369,275	$ 253	90,851	411,325	(42,685)	(90,469)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(3,056)
Balance at end of period (shares) at Jun. 30, 2019		25,235
Balance at end of period at Jun. 30, 2019	387,105	$ 253	92,297	408,086	(23,007)	(90,524)
Balance at beginning of period (shares) at Mar. 31, 2019		25,228
Balance at beginning of period at Mar. 31, 2019	373,214	$ 252	91,713	415,032	(43,272)	(90,511)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(6,946)			(6,946)
Other comprehensive income (loss), net of tax	20,265				20,265
Stock repurchased	(13)					(13)
Stock issued (canceled) under employee plans (shares)		(3)
Stock issued (canceled) under employee plans	13	$ 1	12
Stock-based compensation expense	332		332
Stock issued to directors (shares)		10
Stock issued to directors	240		240
Balance at end of period (shares) at Jun. 30, 2019		25,235
Balance at end of period at Jun. 30, 2019	$ 387,105	$ 253	$ 92,297	$ 408,086	$ (23,007)	$ (90,524)

Basis of Financial Statement Pr

Basis of Financial Statement Presentation	6 Months Ended
	Jun. 30, 2019
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 August 31, 2018, the Company acquired an engineered sealing materials business operating under Interface Performance Materials ("Interface"), based in Lancaster, Pennsylvania for $267.0 million , net of cash acquired of $5.2 million . A globally-recognized leader in the delivery of engineered sealing solutions, the Interface operations manufacture wet-laid gasket and specialty materials primarily serving OEM and Tier I manufacturers in the agriculture, construction, earthmoving, industrial, and automotive segments. The acquired business is included in the Company's Performance Materials operating 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 Interface have been included in the Consolidated Statements of Operations beginning on the date of acquisition. The year-end Condensed Consolidated Balance Sheet was derived from the audited financial statements for the year ended December 31, 2018 , but does not include all disclosures required by U.S. GAAP. 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, 2018 . Recent Accounting Pronouncements Effective January 1, 2019, the Company adopted the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, "Leases (Topic 842)", along with several additional clarification ASU's issued during 2018, collectively, "New Lease Standard". The New Lease Standard 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 New Lease Standard also requires 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. The Company's adoption of the New Lease Standard was on a modified retrospective basis and did not have any impact on the Company's 2018 financial statements and disclosures. As part of the adoption of the New Lease Standard, the Company elected the package of practical expedients which allowed the Company to not re-assess 1) if any existing arrangements contained a lease, 2) the lease classification of any existing leases and 3) initial direct costs for any existing lease. The Company also elected the practical expedient which allows use of hindsight in determining the lease term for leases in existence at the date of adoption. Effective January 1, 2019, the Company reported lease right-of-use assets and lease liabilities on the Company's Condensed Consolidated Balance Sheets. Adoption of the New Lease Standard did not change the balances reported in the Company's 2019 Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Cash Flows, or Condensed Statements of Comprehensive Income. Please refer to Footnote 8 "Leases" for additional information required as part of the adoption of the New Lease Standard. Effective January 1, 2019, the Company adopted the FASB issued ASU No. 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Account for Hedging Activities". This ASU provides various improvements revolving around the financial reporting of hedging relationships that requires an entity to amend the presentation and disclosure of hedging activities to better portray the economic results of an entity's risk management activities in its financial statements. The adoption of this ASU did not have any impact on the Company’s consolidated financial statements and disclosures. Effective January 1, 2019, the Company adopted the FASB issued ASU No. 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income". This ASU allows for reclassification of stranded tax effects resulting from the 2017 Tax Cuts and Jobs Act from accumulated other comprehensive income to retained earnings, but does not require the reclassification. The Company elected not to reclassify the income tax effects of the 2017 Tax Cuts and Jobs Act from accumulated other comprehensive income to retained earnings. Effective January 1, 2019, the Company adopted the FASB issued ASU No. 2018-07, "Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting". This ASU expands the guidance for stock-based compensation to include share-based payment transactions for acquiring goods and services from nonemployees. The adoption of this ASU did not have any impact on the Company’s consolidated financial statements and disclosures. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326)". The new standard amends guidance on reporting credit losses for assets held at amortized cost basis. This ASU is effective for financial statements issued for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is currently evaluating the impact this guidance may have on its consolidated financial statements and disclosures. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement", which adds, amends and removes certain disclosure requirements related to fair value measurements. Among other changes, this standard requires certain additional disclosure surrounding Level 3 assets, including changes in unrealized gains or losses in other comprehensive income and certain inputs in those measurements. This ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Certain amended or eliminated disclosures in this standard may be adopted early, while certain additional disclosure requirements in this standard can be adopted on its effective date. In addition, certain changes in the standard require retrospective adoption, while other changes must be adopted prospectively. The Company is currently evaluating the impact of this update on its consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU No. 2018-14, "Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans." This ASU requires entities to disclose the weighted-average interest crediting rates for cash balance plans and other plans with promised interest crediting rates. This ASU also requires entities to disclose an explanation for significant gains and losses related to changes in the benefit obligation for the period. This ASU is effective for fiscal years beginning after December 15, 2020 with early adoption permitted. The Company is currently evaluating the method and impact the adoption of this ASU will have on its consolidated financial statements and disclosures. In August 2018, the FASB issued ASU 2018 - 15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40); Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The amendments in this update require implementation costs incurred by customers in cloud computing arrangements (i.e., hosting arrangements) to be capitalized under the same premises of authoritative guidance for internal-use software, and deferred over the noncancellable term of the cloud computing arrangement plus any option renewal periods that are reasonably certain to be exercised by the customer or for which the exercise is controlled by the service provider. The Company is required to adopt this new guidance in the first quarter of 2020. Early adoption is permitted. The Company is currently evaluating the impact of this update on its consolidated financial statements and related disclosures. Significant Accounting Policies The Company’s significant accounting policies are detailed in Note 1, “Significant Accounting Policies” within Part IV Item 15 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 . Significant changes to these accounting policies as a result of adopting the New Lease Standard are discussed within Note 8, “Leases”.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers The Company accounts for revenue in accordance with ASC 606, Revenue from Contracts from Customers. These revenues are generated from the design and manufacture of specialty engineered filtration media, industrial thermal insulating solutions, automotive thermal and acoustical barriers for filtration/separation and thermal/acoustical applications. The Company’s revenue recognition policies require the Company to make significant judgments and estimates. In applying the Company’s revenue recognition policy, determinations must be made as to when control of products passes to the Company’s customers which can be either at a point in time or over time. Revenue is generally recognized at a point in time when control passes to customers upon shipment of the Company’s products and revenue is generally recognized over time when control of the Company’s products transfers to customers during the manufacturing process. The Company analyzes several factors, including but not limited to, the nature of the products being sold and contractual terms and conditions in contracts with customers to help the Company make such judgments about revenue recognition. Contract Assets and Liabilities The Company’s contract assets primarily include unbilled amounts typically resulting from sales under contracts when the over time method of revenue recognition is utilized and revenue recognized exceeds the amount billed to the customer. These unbilled accounts receivable in contract assets are transferred to accounts receivable upon invoicing, typically when the right to payment becomes unconditional in which case payment is due based only upon the passage of time. The Company’s contract liabilities primarily relate to billings and advance payments received from customers, and deferred revenue. These contract liabilities represent the Company’s obligation to transfer its products to its customers for which the Company has received, or is owed consideration from its customers. Contract liabilities are included in deferred revenue on the Company’s Condensed Consolidated Balance Sheets. Contract assets and liabilities consisted of the following: In thousands June 30, 2019 December 31, 2018 Dollar Change Contract assets $ 21,566 $ 23,040 $ (1,474 ) Contract liabilities $ 2,707 $ 4,537 $ (1,830 ) The $1.5 million decrease in contract assets from December 31, 2018 to June 30, 2019 was primarily due to timing of billings to customers. The $1.8 million decrease in contract liabilities from December 31, 2018 to June 30, 2019 was primarily due to $ 3.4 million of revenue recognized in the first six months of 2019 related to contract liabilities at December 31, 2018 , offset by an increase in customer deposits. Disaggregated Revenue The Company disaggregates revenue from customers by geographic region, as it believes this disclosure best depicts how the nature, amount, timing and uncertainty of the Company's revenue and cash flows are affected by economic factors. Disaggregated revenue by geographical region for the quarters and six months ended June 30, 2019 and 2018 were as follows: Quarter Ended June 30, 2019 In thousands Performance Materials Technical Nonwovens Thermal Acoustical Solutions Eliminations and Other Consolidated Net Sales North America $ 47,822 $ 42,667 $ 64,235 $ (6,466 ) $ 148,258 Europe 15,729 17,791 25,203 (175 ) 58,548 Asia 1,551 8,620 3,834 — 14,005 Total Net Sales $ 65,102 $ 69,078 $ 93,272 $ (6,641 ) $ 220,811 Quarter Ended June 30, 2018 In thousands Performance Materials Technical Nonwovens Thermal Acoustical Solutions Eliminations and Other Consolidated Net Sales North America $ 20,879 $ 45,564 $ 61,922 $ (6,533 ) $ 121,832 Europe 10,355 18,053 24,515 (169 ) 52,754 Asia — 8,095 3,732 — 11,827 Total Net Sales $ 31,234 $ 71,712 $ 90,169 $ (6,702 ) $ 186,413 Six Months Ended June 30, 2019 In thousands Performance Materials Technical Nonwovens Thermal Acoustical Solutions Eliminations and Other Consolidated Net Sales North America $ 94,199 $ 79,856 $ 127,837 $ (12,734 ) $ 289,158 Europe 32,386 36,840 51,645 (381 ) 120,490 Asia 3,097 17,988 8,103 — 29,188 Total Net Sales $ 129,682 $ 134,684 $ 187,585 $ (13,115 ) $ 438,836 Six Months Ended June 30, 2018 In thousands Performance Materials Technical Nonwovens Thermal Acoustical Solutions Eliminations and Other Consolidated Net Sales North America $ 40,040 $ 84,697 $ 131,901 $ (14,359 ) $ 242,279 Europe 21,887 37,439 52,570 (354 ) 111,542 Asia — 17,117 7,135 — 24,252 Total Net Sales $ 61,927 $ 139,253 $ 191,606 $ (14,713 ) $ 378,073

Acquisitions and Divestiture

Acquisitions and Divestiture	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Acquisitions and Divestiture	Acquisitions and Divestiture Acquisitions On August 31, 2018, the Company completed the acquisition of Interface Performance Materials ("Interface"), based in Lancaster, Pennsylvania. A globally-recognized leader in the delivery of engineered sealing solutions, the Interface operations manufacture wet-laid gasket and specialty materials primarily serving OEM and Tier I manufacturers in the Agriculture, Construction, Earthmoving, Industrial, and Automotive segments. The transaction strengthens the Company's position as an industry-leading global provider of filtration and engineered materials and expands the Company's end markets into attractive adjacencies. The Company acquired one hundred percent of Interface for an initial price of $268.4 million , net of cash acquired of $5.2 million . In the second quarter of 2019, the Company recorded a post closing adjustment resulting in a decrease in purchase price of $1.4 million resulting in a purchase price of $267.0 million . The purchase price was financed with a combination of cash on hand and $261.4 million of borrowings from the Company's amended $450 million credit facility. The operating results of the Interface businesses have been included in the Consolidated Statements of Operations since August 31, 2018, the date of acquisition, and are reported within the Performance Materials reporting segment. For the quarter ended June 30, 2019 , Interface reported net sales and operating income of $32.7 million and $0.1 million , respectively. Interface's operating income for the quarter ended June 30, 2019 included $4.0 million of intangible assets amortization expense in selling, product development and administrative expenses. There were no sales or operating income for Interface during the quarter ended June 30, 2018 as the acquisition was completed on August 31, 2018. For the six months ended June 30, 2019 , Interface reported net sales and operating loss of $65.6 million and $0.7 million , respectively. Interface's operating income loss for the six months ended June 30, 2019 included $8.0 million of intangible assets amortization expense in selling, product development and administrative expenses. There were no sales or operating income for Interface during the six months ended June 30, 2018 as the acquisition was completed on August 31, 2018. The following table presents the preliminary determination of the fair value of identifiable assets acquired and liabilities assumed from the Company's acquisition of Interface. The final determination of the fair value of certain assets and liabilities will be completed within the one year measurement period as required by the FASB ASC Topic 805, “Business Combinations.” As the Company finalizes the fair value of assets acquired and liabilities assumed, additional purchase price adjustments may be recorded during the measurement period within one year of the acquisition date. Fair value estimates are based on a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. The judgments used to determine the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can materially impact the Company's results of operations. The finalization of the purchase accounting assessment may result in a change in the valuation of assets acquired and liabilities assumed and may have a material impact on the Company's results of operations and financial position. In thousands Accounts receivable $ 25,182 Inventories 17,013 Prepaid expenses and other current assets 2,382 Property, plant and equipment 40,902 Goodwill (Note 5) 130,346 Other intangible assets (Note 5) 106,900 Other assets 308 Total assets acquired, net of cash acquired $ 323,033 Current liabilities $ (11,319 ) Deferred tax liabilities (24,678 ) Benefit plan liabilities (Note 12) (19,002 ) Other long-term liabilities (1,031 ) Total liabilities assumed (56,030 ) Total purchase price, net of cash acquired $ 267,003 The following table reflects the unaudited actual results of the Company for the quarter and six months ended June 30, 2019 and the pro forma operating results of the Company for the quarter and six months ended June 30, 2018 , which gives effect to the acquisition of Interface as if it had occurred on January 1, 2017. The pro forma information includes the historical financial results of the Company and Interface. The pro forma results are not necessarily indicative of the operating results that would have occurred had the acquisition been effective January 1, 2017, 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 acquisition. Quarter Ended Six Months Ended (Actual) (Pro Forma) (Actual) (Pro Forma) In thousands 2019 2018 2019 2018 Net sales $ 220,811 $ 226,404 $ 438,836 $ 457,481 Net (loss) income $ (6,946 ) $ 11,589 $ (3,056 ) $ 22,518 Earnings per share: Basic $ (0.40 ) $ 0.67 $ (0.18 ) $ 1.31 Diluted $ (0.40 ) $ 0.67 $ (0.18 ) $ 1.30 Basic 17,267 17,196 17,260 17,178 Diluted 17,267 17,335 17,260 17,334 Included in net income during the quarter ended June 30, 2019 was $3.1 million of intangible assets amortization expense related to acquired Interface intangible assets and $2.6 million of interest expense primarily to finance the Interface acquisition. Pro forma adjustments during the quarter ended June 30, 2018 reduced net income by $0.6 million . Included in net income for the quarter ended June 30, 2018 was $3.0 million of intangible assets amortization expense and $2.1 million of interest expense associated with borrowings under the Company's Amended Credit Facility. Net income was adjusted to exclude items such as corporate strategic initiatives expenses, Interface management fee expenses and tax valuation allowance expenses. Included in net income during the six months ended June 30, 2019 was $6.1 million of intangible assets amortization expense related to acquired Interface intangible assets and $5.2 million of interest expense to finance the Interface acquisition. Pro forma adjustments during the six months ended June 30, 2018 reduced net income by $2.1 million . Included in net income for the six months ended June 30, 2018 was $6.1 million of intangible assets amortization expense and $4.2 million of interest expense associated with borrowings under the Company's Amended Credit Facility. Net income was adjusted to exclude items such as corporate strategic initiatives expenses, Interface management fee expenses and tax valuation allowance expenses. On July 12, 2018, the Company acquired certain assets and assumed certain liabilities of the Precision Filtration division of Precision Custom Coatings ("PCC") based in Totowa, NJ. Precision Filtration is a producer of high-quality, air filtration media principally serving the commercial and residential HVAC markets with a range of low efficiency through high-performing air filtration media. The Company acquired the assets and liabilities of PCC for $1.6 million in cash with additional cash payments of up to $2.0 million to be made based on the achievement of certain future financial targets through 2022. PCC had a minimal impact on the Company's sales and operating income for the quarter ended June 30, 2019 . Divestiture On May 9, 2019, the Company sold its Texel Geosol, Inc. ("Geosol") business, a subsidiary of the Company's Texel Technical Materials, Inc. ("Texel") business, for a cash purchase price of $3.0 million , subject to a post-closing adjustment(s) within ninety days of the purchase date. Under the terms of the arrangement, $0.4 million of the total purchase price will be withheld and paid to the Company in three annual payments of approximately $0.1 million . The disposition was completed pursuant to a Sale Agreement, dated May 9, 2019, by and between the Company, and the third-party buyer. The Company recognized a pre-tax gain on the sale of $1.5 million , reported as non-operating income in the second quarter of 2019. Net of income taxes, the Company reported a gain on sale of $1.3 million . The Company did not report Geosol as a discontinued operation as it would not be considered a strategic shift in Lydall's business. Accordingly, the operating results of Geosol are included in the operating results of the Company through the sale date and in comparable periods.

Inventories

Inventories	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories as of June 30, 2019 and December 31, 2018 were as follows: In thousands June 30, December 31, Raw materials $ 41,108 $ 37,731 Work in process 16,527 18,296 Finished goods 30,597 28,438 Total inventories $ 88,232 $ 84,465 Included in work in process is gross tooling inventory of $2.5 million and $4.3 million at June 30, 2019 and December 31, 2018

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2019
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 six months ended June 30, 2019 were as follows: In thousands December 31, Currency translation adjustments Reductions June 30, Performance Materials $ 144,626 $ (84 ) $ (65 ) $ 144,477 Technical Nonwovens 52,337 982 — 53,319 Total goodwill $ 196,963 $ 898 $ (65 ) $ 197,796 Goodwill Associated with Acquisitions The net goodwill reduction of $0.1 million within the Performance Materials segment was due to a goodwill reduction of $0.7 million as a result of a post-closing purchase price adjustment in the second quarter of 2019 related to the acquisition of Interface Performance Materials on August 31, 2018, partially offset by acquisition activity in the second quarter of 2019 resulting in a goodwill addition of $0.6 million . 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, 2019 and December 31, 2018 : June 30, 2019 December 31, 2018 In thousands Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Amortized intangible assets Customer Relationships $ 142,418 $ (21,134 ) $ 141,455 $ (11,453 ) Patents 4,366 (3,841 ) 4,333 (3,816 ) Technology 2,500 (898 ) 2,500 (810 ) Trade Names 7,302 (4,017 ) 7,235 (2,840 ) License Agreements 616 (616 ) 619 (619 ) Other 559 (559 ) 561 (561 ) Total amortized intangible assets $ 157,761 $ (31,065 ) $ 156,703 $ (20,099 )

Long-term Debt and Financing Ar

Long-term Debt and Financing Arrangements	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Long-term Debt and Financing Arrangements	Long-term Debt and Financing Arrangements On August 31, 2018, the Company amended and restated its $175 million senior secured revolving credit agreement ("Amended Credit Agreement") that increased the available borrowing from $175 million to $450 million , added three additional lenders and extended the maturity date from July 7, 2021 to August 31, 2023. Under the terms of the Amended Credit Agreement, the lenders are providing up to a $450 million credit facility (the “Facility”) to the Company, under which the lenders provided a term loan commitment of $200 million and revolving loans to or for the benefit of the Company and its subsidiaries of up to $250 million. The Facility may be increased by an aggregate amount not to exceed $150 million through an accordion feature, subject to specified conditions. The Facility is secured by substantially all of the assets of the Company. 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 Dollar 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 0.00% to 1.25% , and the Applicable Rate added to Eurocurrency Rate Committed Loans and Letters of Credit ranges from 0.75% to 2.00% . The Company pays a quarterly fee ranging from 0.15% to 0.275% on the unused portion of the revolving commitment. The Company has entered into multiple interest rate swaps to convert a portion of the Company's one-month LIBOR-based borrowings from a variable rate to a fixed rate. See Note 7. The Company is permitted to prepay term and revolving borrowings in whole or in part at any time without premium or penalty, subject to certain minimum payment requirements, and the Company is generally permitted to irrevocably cancel unutilized portions of the revolving commitments under the Amended Credit Agreement. The Company is required to repay the term commitment in an amount of $2.5 million per quarter beginning with the quarter ending December 31, 2018 through the quarter ending June 30, 2023. The Amended Credit Agreement contains covenants required of the Company and its subsidiaries, including various affirmative and negative financial and operational covenants. The Company is required to meet certain quarterly financial covenants calculated from the four fiscal quarters most recently ended, including: (i) a minimum consolidated fixed charge coverage ratio, which requires that at the end of each fiscal quarter the ratio of (a) consolidated EBITDA to (b) the sum of consolidated interest charges, redemptions, non-financed maintenance capital expenditures, restricted payments and taxes paid, each as defined in the Amended Credit Agreement, may not be lower than 1.25 to 1.0; and (ii) a consolidated net leverage ratio, which requires that at the end of each fiscal quarter the ratio of consolidated funded indebtedness minus consolidated domestic cash to consolidated EBITDA, as defined in the Amended Credit Agreement, may not be greater than 3.5 to 1.0. The Company was in compliance with all covenants at June 30, 2019 . At June 30, 2019 , the Company had borrowing availability of $108.2 million under the Facility, net of $300.0 million of borrowings outstanding and standby letters of credit outstanding of $3.8 million . The borrowings outstanding included a $162.0 million term loan, net of $0.5 million in debt issuance costs being amortized to interest expense over the debt maturity period. In addition to the amounts outstanding under the Facility, the Company has various acquired foreign credit facilities totaling approximately $8.2 million . At June 30, 2019 , the Company's foreign subsidiaries had $0.1 million in borrowings outstanding as well as $1.8 million in standby letters of credit outstanding. The Company also has finance lease agreements for machinery and equipment at multiple operations requiring monthly principal and interest payments through 2020. Total outstanding debt consists of: In thousands Effective Rate Maturity June 30, 2019 December 31, 2018 Revolver loan 4.40 % 8/31/2023 $ 138,000 $ 138,000 Term loan, net of debt issuance costs 4.40 % 8/31/2023 161,552 186,498 Finance leases 0.00% - 2.09% 2019 - 2020 122 315 299,674 324,813 Less portion due within one year (10,001 ) (10,172 ) Total long-term debt, net of debt issuance costs $ 289,673 $ 314,641 The carrying value of the Company’s debt outstanding on its 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 weighted average interest rate on long-term debt was 4.3% for the six months ended June 30, 2019 and 3.4% for the year ended December 31, 2018 .

Derivatives

Derivatives	6 Months Ended
	Jun. 30, 2019
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 enters 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. In November 2018, the Company entered into a five -year interest rate swap agreement with a bank which converts the interest on a notional $139.0 million of the Company's one-month LIBOR-based borrowings under its Amended Credit Agreement from a variable rate, plus the borrowing spread, to a fixed rate of 3.09% plus the borrowing spread. The notional amount reduces quarterly by fluctuating amounts through August 2023. In April 2017, the Company entered into a three -year interest rate swap agreement with a bank which converts the interest on a notional $60.0 million of the Company's one-month LIBOR-based borrowings under its Amended Credit Agreement 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. These interest rate swap agreements were accounted for as cash flow hedges. Effectiveness of these derivative agreements are assessed quarterly by ensuring that the critical terms of the swaps 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, 2019 December 31, 2018 In thousands Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives Derivatives designated as hedging instruments: Interest rate contracts $ 34 $ 5,263 $ 179 $ 2,738 Total derivatives $ 34 $ 5,263 $ 179 $ 2,738 The following table sets forth the income recorded in accumulated other comprehensive (loss) income, net of tax, for the quarters and six months ended June 30, 2019 and 2018 for derivatives held by the Company and designated as hedging instruments: Quarters Ended June 30, Six Months Ended June 30, In thousands 2019 2018 2019 2018 Cash flow hedges: Interest rate contracts $ (1,351 ) $ (27 ) $ (2,026 ) $ 75 $ (1,351 ) (27 ) $ (2,026 ) $ 75

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Leases From time to time, the Company enters into arrangements with vendors to provide certain tangible assets used in the Company's operations which qualify as a lease pursuant to ASC Topic 842, Leases. The tangible assets leased include Buildings, Office Equipment, Machinery and Vehicles. The Company's leases have remaining terms of a few months to 14 years , some of which have options to extend for a period of up to 7 years and some of which have options to terminate within 1 year . At inception of the arrangement, the Company determines if an arrangement is a lease based on assessment of the terms and conditions of the contract. Operating leases are included in Operating lease right-of-use (“ROU”) assets, other accrued liabilities, and Long-term operating lease liabilities in the Company's condensed consolidated balance sheets. Finance leases are included in property, plant and equipment, Current portion of long-term debt, and long-term debt in the Company's condensed consolidated balance sheets. ROU assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. While the overwhelming majority of leases have fixed payments schedules, some leases have variable lease schedules based on market indices such as LIBOR or include additional payments based on excess consumption of services. For leases on a variable schedule based on a market index, the current lease payment amount is used in the calculation of the lease liability and corresponding asset included on the balance sheet. For leases with additional payments based on excess consumption of services, no amount is included in the calculation of the lease liability or corresponding asset as it is not probable excess consumption will continue in the future. As most leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. At June 30, 2019 , the weighted average discount rate used for operating and finance leases is 4.39% and 1.78% , respectively. The implicit rate is used when readily determinable from a lease. The operating lease ROU asset also includes any lease payments made in advance of the assets use and excludes lease incentives received. The Company's lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has lease agreements with lease and non-lease components, which are generally accounted for as one component as permitted by ASC 842. After consideration of any options to terminate early which are reasonably certain to be executed or any options to extend which are not reasonably certain to be executed, any lease with a term of 12 months or less is considered short-term. As permitted by ASC 842, short-term leases are excluded from the ROU Asset and Lease Liability accounts on the condensed consolidated balance sheets. Consistent with all other operating leases, short-term lease expense is recorded on a straight-line basis over the lease term. The components of lease expense are as follows: In thousands Quarter Ended Six Months Ended Finance lease expense: Amortization of right-of-use assets $ 16 $ 49 Interest on lease liabilities — 1 Operating lease expense 1,605 3,249 Short-term lease expense 244 468 Variable lease expense 18 54 Total lease expense $ 1,883 $ 3,821 Supplemental balance sheet information related to leases are as follows: In thousands, except lease term June 30, 2019 Operating leases: Operating lease right-of-use assets $ 27,070 Short-term lease liabilities, included in "Other accrued liabilities" $ 5,176 Long-term lease liabilities 22,006 Total operating lease liabilities $ 27,182 Finance leases: Property, plant and equipment $ 740 Accumulated depreciation (195 ) Property, plant and equipment, net $ 545 Short-term lease liabilities, included in debt $ 109 Long-term lease liabilities, included in debt 13 Total finance lease liabilities $ 122 Weighted average remaining lease term: Operating leases 7.5 years Finance leases 12.0 years Supplemental cash flow information related to leases are as follows: Six Months Ended June 30, In thousands 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,162 Operating cash flows from finance leases 1 Financing cash flows from finance leases 188 Right-of-use assets obtained in exchange for lease obligations: Operating leases 1,676 Finance leases — As of June 30, 2019 , future lease payments maturities were as follows: In thousands Years Ending December 31, Operating Leases Finance Leases 2019 (excluding the six months ended June 30, 2019) $ 3,223 $ 89 2020 5,723 34 2021 4,408 — 2022 3,643 — 2023 2,753 — Thereafter 12,822 — Total lease payments 32,572 123 Less imputed interest (5,390 ) (1 ) Total discounted future lease payments $ 27,182 $ 122 As of December 31, 2018 , future lease payment maturities were as follows: In thousands Years Ending December 31, Operating Leases Finance Leases 2019 $ 6,004 $ 279 2020 4,871 35 2021 3,877 — 2022 3,226 — 2023 2,617 — Thereafter 11,111 — Total lease payments $ 31,706 $ 314
Leases	Leases From time to time, the Company enters into arrangements with vendors to provide certain tangible assets used in the Company's operations which qualify as a lease pursuant to ASC Topic 842, Leases. The tangible assets leased include Buildings, Office Equipment, Machinery and Vehicles. The Company's leases have remaining terms of a few months to 14 years , some of which have options to extend for a period of up to 7 years and some of which have options to terminate within 1 year . At inception of the arrangement, the Company determines if an arrangement is a lease based on assessment of the terms and conditions of the contract. Operating leases are included in Operating lease right-of-use (“ROU”) assets, other accrued liabilities, and Long-term operating lease liabilities in the Company's condensed consolidated balance sheets. Finance leases are included in property, plant and equipment, Current portion of long-term debt, and long-term debt in the Company's condensed consolidated balance sheets. ROU assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. While the overwhelming majority of leases have fixed payments schedules, some leases have variable lease schedules based on market indices such as LIBOR or include additional payments based on excess consumption of services. For leases on a variable schedule based on a market index, the current lease payment amount is used in the calculation of the lease liability and corresponding asset included on the balance sheet. For leases with additional payments based on excess consumption of services, no amount is included in the calculation of the lease liability or corresponding asset as it is not probable excess consumption will continue in the future. As most leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. At June 30, 2019 , the weighted average discount rate used for operating and finance leases is 4.39% and 1.78% , respectively. The implicit rate is used when readily determinable from a lease. The operating lease ROU asset also includes any lease payments made in advance of the assets use and excludes lease incentives received. The Company's lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has lease agreements with lease and non-lease components, which are generally accounted for as one component as permitted by ASC 842. After consideration of any options to terminate early which are reasonably certain to be executed or any options to extend which are not reasonably certain to be executed, any lease with a term of 12 months or less is considered short-term. As permitted by ASC 842, short-term leases are excluded from the ROU Asset and Lease Liability accounts on the condensed consolidated balance sheets. Consistent with all other operating leases, short-term lease expense is recorded on a straight-line basis over the lease term. The components of lease expense are as follows: In thousands Quarter Ended Six Months Ended Finance lease expense: Amortization of right-of-use assets $ 16 $ 49 Interest on lease liabilities — 1 Operating lease expense 1,605 3,249 Short-term lease expense 244 468 Variable lease expense 18 54 Total lease expense $ 1,883 $ 3,821 Supplemental balance sheet information related to leases are as follows: In thousands, except lease term June 30, 2019 Operating leases: Operating lease right-of-use assets $ 27,070 Short-term lease liabilities, included in "Other accrued liabilities" $ 5,176 Long-term lease liabilities 22,006 Total operating lease liabilities $ 27,182 Finance leases: Property, plant and equipment $ 740 Accumulated depreciation (195 ) Property, plant and equipment, net $ 545 Short-term lease liabilities, included in debt $ 109 Long-term lease liabilities, included in debt 13 Total finance lease liabilities $ 122 Weighted average remaining lease term: Operating leases 7.5 years Finance leases 12.0 years Supplemental cash flow information related to leases are as follows: Six Months Ended June 30, In thousands 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,162 Operating cash flows from finance leases 1 Financing cash flows from finance leases 188 Right-of-use assets obtained in exchange for lease obligations: Operating leases 1,676 Finance leases — As of June 30, 2019 , future lease payments maturities were as follows: In thousands Years Ending December 31, Operating Leases Finance Leases 2019 (excluding the six months ended June 30, 2019) $ 3,223 $ 89 2020 5,723 34 2021 4,408 — 2022 3,643 — 2023 2,753 — Thereafter 12,822 — Total lease payments 32,572 123 Less imputed interest (5,390 ) (1 ) Total discounted future lease payments $ 27,182 $ 122 As of December 31, 2018 , future lease payment maturities were as follows: In thousands Years Ending December 31, Operating Leases Finance Leases 2019 $ 6,004 $ 279 2020 4,871 35 2021 3,877 — 2022 3,226 — 2023 2,617 — Thereafter 11,111 — Total lease payments $ 31,706 $ 314

Equity Compensation Plans

Equity Compensation Plans	6 Months Ended
	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Equity Compensation Plans	Equity Compensation Plans As of June 30, 2019 , 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. The Company accounts for forfeitures as they occur. Compensation expense for performance based awards granted prior to December 2018, 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. In December 2018, the performance metric changed to a 3 -year relative Total Shareholder Return (TSR) compared to S&P 600 industrial index instead of a pre-established earnings-per-share target to better align compensation to the long-term interests of shareholders. Stock options issued under the current plan must have an exercise price that may not be less than the fair market value of the Company’s Common Stock on the date of grant. The Plans provide for automatic acceleration of vesting in the event of a change in control of the Company. Upon the exercise of a stock option under the Plans, shares are issued from authorized shares or treasury shares held by the Company. The Company incurred equity compensation expense of $0.5 million and $1.4 million for the quarters ended June 30, 2019 and June 30, 2018 , respectively, and $1.5 million and $2.6 million for the six months ended June 30, 2019 and June 30, 2018 , 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, 2019 : In thousands except per share amounts Shares Weighted- Average Exercise Price Aggregate Intrinsic Value Outstanding at June 30, 2019 599 $ 30.32 $ 644 Exercisable at June 30, 2019 256 $ 29.89 $ 635 Unvested at June 30, 2019 343 $ 30.64 $ 9 There were no stock options granted and 3,325 stock options exercised during the quarter and six months ended June 30, 2019 . There was no cash received from the exercise of stock options during the quarter and six months ended June 30, 2019 . The intrinsic value of stock options exercised was $0.1 million with a tax benefit of less than $0.1 million during the quarter and six months ended June 30, 2019 . There were no stock options granted and no stock options exercised during the quarter ended June 30, 2018 . There were 11,180 stock options granted and 27,041 stock options exercised during the six months ended June 30, 2018 . The amount of cash received from the exercise of stock options was $0.7 million during the six months ended June 30, 2018 . The intrinsic value of stock options exercised was $0.7 million with a tax benefit of $0.1 million during the six months ended June 30, 2018 . At June 30, 2019 , the total unrecognized compensation cost related to non-vested stock option awards was approximately $3.0 million , with a weighted average expected amortization period of 2.7 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 ended June 30, 2019 and 33,932 time-based restricted stock shares granted during the six months ended June 30, 2019 . There were no performance-based restricted shares granted during the quarter and six months ended June 30, 2019 . There were no performance-based restricted shares that vested during the quarter and six months ended June 30, 2019 . There were no time-based restricted shares that vested during the quarter ended June 30, 2019 and 5,468 time-based restricted shares that vested during the six months ended June 30, 2019 . There were no time-based restricted stock shares granted during the quarter ended June 30, 2018 and 8,106 time-based restricted stock shares granted during the six months ended June 30, 2018 . There were no performance-based restricted stock shares granted during the quarter ended June 30, 2018 and 15,190 performance-based restricted shares granted during the six months ended June 30, 2018 . There were no performance-based restricted stock shares that vested during the quarter ended June 30, 2018 and 48,035 performance-based restricted shares that vested during the six months ended June 30, 2018 . There were no time-based restricted stock shares that vested during the quarter ended June 30, 2018 and 5,164 time-based restricted shares that vested during the six months ended June 30, 2018 . At June 30, 2019 , there were 265,816 unvested restricted stock awards with total unrecognized compensation cost related to these awards of $3.9 million with a weighted average expected amortization period of 1.9 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, 2019
Equity [Abstract]
Stock Repurchases	Stock Repurchases During the six months ended June 30, 2019 , the Company purchased 2,124 shares of common stock valued at $0.1 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, 2019
Restructuring and Related Activities [Abstract]
Restructuring	Restructuring In 2017, the Company commenced a restructuring plan in the Technical Nonwovens segment which includes 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 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 $4.2 million , in connection with this restructuring plan, of which approximately $3.7 million is expected to result in cash expenditures over the period of consolidation. The Company also expects to incur cash expenditures of approximately $3.8 million for capital expenditures associated with this plan. During the quarter ended June 30, 2019 , the Company recorded pre-tax restructuring expenses of $0.1 million , primarily related to severance costs in selling, product development and administrative expenses. During the six months ended June 30, 2019 , the Company recorded pre-tax restructuring expenses of $0.5 million , primarily related to equipment move costs in cost of sales. The Company expects to record approximately $0.8 million of restructuring expenses for the remainder of 2019. 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 Total estimated expenses 1,250 450 2,500 4,200 Expenses incurred through December 31, 2018 787 290 1,882 2,959 Estimated remaining expense at December 31, 2018 463 160 618 1,241 Expense incurred during quarter ended: March 31, 2019 16 — 360 376 June 30, 2019 53 — 44 97 Total pre-tax expense incurred 856 290 2,286 3,432 Estimated remaining expense at June 30, 2019 394 160 214 768 There were cash outflows of $0.2 million and $0.5 million for the restructuring program for the quarter and six months ended June 30, 2019 , respectively. Accrued restructuring costs were as follows at June 30, 2019 : In thousands Total Balance as of December 31, 2018 $ 147 Pre-tax restructuring expenses, excluding depreciation 473 Cash paid (534 ) Balance as of June 30, 2019 $ 86

Employer Sponsored Benefit Plan

Employer Sponsored Benefit Plans	6 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Employer Sponsored Benefit Plans	Employer Sponsored Benefit Plans Prior to the quarter ended June 30, 2019, the Company maintained a defined benefit pension plan ("U.S. Lydall Pension Plan") and two domestic pension plans acquired in the Interface acquisition ("Interface Pension Plans"), (collectively the "domestic defined benefit pension plans"). During the quarter ended June 30, 2019 , the Company settled the pension obligation of the U.S. Lydall Pension Plan through lump sum distributions to participants or by irrevocably transferring pension liabilities to two insurance companies through the purchase of group annuity contracts. These purchases, funded with pension assets, resulted in a pre-tax settlement loss of $25.5 million in the quarter ended June 30, 2019 , related to the recognition of accumulated deferred actuarial losses. The settlement loss was included as non-operating expense in the condensed consolidated statements of operations. No contributions were made to the U.S. Lydall Pension Plan during the quarter and six months ended June 30, 2019 and contributions of $3.0 million and $4.2 million were made during the quarter and six months ended June 30, 2018 , respectively. The Interface Pension Plans cover Interface's union and non-union employees. The plans are closed to new employees and benefits are no longer accruing for the majority of participants. The Company expects to make a required contribution of approximately $1.0 million to $2.0 million to the Interface Pension Plans during 2019. Contributions of $0.3 million and $0.9 million were made during the quarter and six months ended June 30, 2019 , respectively. The following is a summary of the components of net periodic benefit cost for the domestic defined benefit pension plans for the quarters and six months ended June 30, 2019 and 2018 : Quarters Ended June 30, Six Months Ended June 30, In thousands 2019 2018 2019 2018 Components of employer benefit cost Service cost $ 30 $ — $ 60 $ — Interest cost 833 470 1,827 940 Expected return on assets (744 ) (650 ) (1,616 ) (1,300 ) Amortization of actuarial loss 186 256 464 512 Net periodic benefit cost $ 305 $ 76 $ 735 $ 152 Settlement loss 25,515 — 25,515 — Total employer benefit plan cost $ 25,820 $ 76 $ 26,250 $ 152 The Company reports the service cost component of net periodic benefit cost in the same line item as other compensation costs in operating expenses and the non-service cost components of net periodic benefit cost in other income.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the quarter ended June 30, 2019 the Company recorded a tax benefit of $8.2 million compared to tax expense of $1.7 million for the quarter ended June 30, 2018. The tax benefit was driven by $10.5 million of tax benefit related to the pension plan settlement and resulted in an effective tax rate for the quarter ended June 30, 2019 of 54.0% . This is compared to an effective tax rate of 13.7% for the quarter ended June 30, 2018. The pension plan settlement tax benefit included a $4.5 million benefit related to the reclassification of stranded tax effects from accumulated other comprehensive income. Excluding the tax benefit of the pension plan settlement, the Company's effective tax rate for the quarter ended June 30, 2019 was 22.7% . This was negatively impacted by valuation allowance activity of $0.9 million partially offset by the Company's geographical mix of earnings. The second quarter of 2018 effective tax rate was positively impacted by discretionary pension plan contributions and geographical mix of earnings. For the six months ended June 30, 2019 the Company recorded a tax benefit of $7.1 million compared to tax expense of $3.8 million for the six months ended June 30, 2018. The tax benefit was driven by $10.5 million of tax benefit related to the pension plan settlement and resulted in an effective tax rate for the six months ended June 30, 2019 of 69.7% . This is compared to an effective tax rate of 15.0% for the six months ended June 30, 2018. Excluding the tax benefit of the pension plan settlement, the Company's effective tax rate for the six months ended June 30, 2019 was 22.5% . This was negatively impacted by valuation allowance activity of $1.2 million partially offset by the Company's geographical mix of earnings. 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, Canada and the Netherlands. With few exceptions, the Company is no longer subject to U.S. federal examinations for years before 2015, state and local examinations for years before 2013, and non-U.S. income tax examinations for years before 2003. The Company’s effective tax rates in future periods could be affected by an increase or decrease in earnings in countries where tax rates differ from the United States federal tax rate, the relative impact of permanent tax adjustments on earnings from domestic operations, changes in net deferred tax asset valuation allowances, stock vesting, pension plan terminations, the completion of acquisitions or divestitures, changes in tax rates or tax laws and the completion of ongoing tax planning strategies and audits.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	Earnings (Loss) Per Share For the quarters and six months ended June 30, 2019 and 2018 , basic earnings per share were computed by dividing net income (loss) 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 2019 2018 2019 2018 Basic average common shares outstanding 17,267 17,196 17,260 17,178 Effect of dilutive options and restricted stock awards — 139 — 156 Diluted average common shares outstanding 17,267 17,335 17,260 17,334 Dilutive stock options totaling 54,713 and 69,730 shares of Common Stock were excluded from the diluted per share computation for the quarter and six months ended June 30, 2019 , respectively, as the Company reported a net loss during those periods and, therefore, the effect of including these options would be antidilutive. For each of the quarters ended June 30, 2019 and 2018 , stock options for 520,189 shares and 162,830 shares of Common Stock were not considered in computing diluted earnings per common share because they were antidilutive. For each of the six months ended June 30, 2019 and 2018 , stock options for 521,293 shares and 149,940

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Segment Information	Segment Information As of June 30, 2019 , the Company’s reportable segments were Performance Materials, Technical Nonwovens, and Thermal Acoustical Solutions. Effective September 30, 2018, as a result of the Interface acquisition, the Performance Materials segment changed the disaggregation of revenue at the product level to be categorized as "Filtration" and "Sealing and Advanced Solutions". Prior period product level amounts throughout the Notes to the Condensed Consolidated Financial Statements have been recast to reflect the results of the new product level structure. The recast of historical product level information had no impact on the consolidated financial results. Performance Materials Segment The Performance Materials segment includes filtration media solutions primarily for air, fluid power, life science and industrial applications (“Filtration”), and sealing and gasket solutions, thermal insulation, energy storage, and other engineered products (“Sealing and Advanced Solutions”). 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, respiratory protection, 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 transportation 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. LyPore® media and Solupor® ultra-high molecular weight polyethylene membranes also serve critical liquid filtration/separation applications such as biopharmaceutical pre-filtration and clarification, lateral flow diagnostic and analytical testing, potable water filtration and high purity process filtration such as those found in food and beverage and medical applications. Sealing and Advanced Solutions products include nonwoven specialty engineered materials for a multitude of applications. Interface fiber-reinforced gasket materials serve the heavy-duty diesel, automobile, small engine, transmission and compressor markets. These products handle demanding sealing challenges with a diverse range of metallic, non-metallic, rubber-coated and laminate materials that comprise the extensive Sealing materials portfolio. Interface Engineered Components are ready to use soft and hard gasket parts sold directly to OEMs and aftermarket applications. An example is Select-a-Seal® rubber-edged composite (REC) technology that provides robust sealing, compression, adhesion, and shear strength for driveline applications. Advanced Solutions’ nonwoven veils, papers and specialty composites for the building products, appliance, energy and industrial markets include Manniglas® Thermal Insulation Papers, and Lytherm® Insulation Media for high temperature technology applications. 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. Additional specialty composite materials include specialty fiber calendar bowl products to service the printing and textile industries and press pad materials for industrial lamination processes. Technical Nonwovens Segment The Technical Nonwovens segment primarily produces needle punch nonwoven solutions for a multitude of industries and applications. Products are manufactured and sold globally under the leading brands of Lydall Industrial Filtration, Southern Felt, Gutsche, and Texel. 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 an effective solution to satisfy increasing emission control regulations in a wide range of industries, including power, cement, steel, asphalt, incineration, mining, food, and pharmaceutical. Advanced Materials products include nonwoven rolled-good media used in commercial applications and predominantly serves the geosynthetics, automotive, industrial, medical, and safety apparel markets. Automotive media is provided to Tier I/II suppliers as well as the Company's Thermal Acoustical Solutions 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 Solutions Segment The Thermal Acoustical Solutions segment offers a full range of innovative engineered products tailored for the transportation and industrial sectors to thermally shield sensitive components from high heat, improve exhaust gas treatment and lower harmful emissions as well as assist in the reduction of noise, vibration and harshness (NVH). Within the transportation sector, Lydall’s products are found in the interior (dash insulators, cabin flooring), underbody (wheel well, aerodynamic belly pan, fuel tank, exhaust, tunnel, spare tire) and under hood (engine compartment, outer dash, powertrain, catalytic converter, turbo charger, manifolds) of cars, trucks, SUVs, heavy duty trucks and recreational vehicles. Thermal Acoustical Solutions segment products offer thermal and acoustical insulating solutions comprised of organic and inorganic fiber composites that provide weight reduction, superior noise suppression and increased durability over conventional designs, as well as products that efficiently combine multiple layers of metal and thermal - acoustical insulation media to provide an engineered shielding solution for an array of application areas. 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 flux® product family 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. The tables below present net sales and operating income by segment for the quarters and six months ended June 30, 2019 and 2018 , 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: Quarters Ended June 30, Six Months Ended June 30, In thousands 2019 2018 2019 2018 Performance Materials Segment (1): Filtration $ 24,732 $ 23,061 $ 48,666 $ 46,203 Sealing and Advanced Solutions 40,370 8,173 81,016 15,724 Performance Materials Segment net sales 65,102 31,234 129,682 61,927 Technical Nonwovens Segment: Industrial Filtration 38,706 39,170 81,070 79,401 Advanced Materials (2) 30,372 32,542 53,614 59,852 Technical Nonwovens Segment net sales 69,078 71,712 134,684 139,253 Thermal Acoustical Solutions Segment: Parts 85,705 82,920 170,281 171,041 Tooling 7,567 7,249 17,304 20,565 Thermal Acoustical Solutions Segment net sales 93,272 90,169 187,585 191,606 Eliminations and Other (2) (6,641 ) (6,702 ) (13,115 ) (14,713 ) Consolidated Net Sales $ 220,811 $ 186,413 $ 438,836 $ 378,073 Operating income by segment: Quarters Ended June 30, Six Months Ended June 30, In thousands 2019 2018 2019 2018 Performance Materials (1) $ 3,303 $ 3,649 $ 4,762 $ 6,290 Technical Nonwovens 7,844 6,118 12,578 11,124 Thermal Acoustical Solutions 7,357 8,820 16,848 21,434 Corporate Office Expenses (5,325 ) (6,338 ) (11,959 ) (12,563 ) Consolidated Operating Income $ 13,179 $ 12,249 $ 22,229 $ 26,285 (1) The Performance Materials segment reports the results of Interface and PCC for the period following the date of acquisitions of August 31, 2018 and July 12, 2018, respectively, and included $4.0 million and $8.0 million of incremental intangible assets amortization for the quarter and six months ended June 30, 2019 , respectively. (2) Included in the Technical Nonwovens segment and Eliminations and Other is $4.6 million and $5.8 million in intercompany sales to the Thermal Acoustical Solutions segment for the quarters ended June 30, 2019 and 2018 , respectively, and $9.3 million and $12.9 million for the six months ended June 30, 2019 and 2018 , respectively.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Environmental Remediation 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 Per and Polyfluorinated Substances (“PFAS”) 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 conducted a site investigation, the scope of which was reviewed by the NHDES, in order to assess the extent of potential soil and groundwater contamination and develop a remedial action. 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 2018, the Company received a response from the NHDES to the site investigation report outlining proposed remedial actions. The Company recorded an additional $0.1 million of expense in 2018 associated with the expected costs to remediate the impacts of the discharge of regulated contaminants in accordance with standards established by the NHDES. During 2018 the environmental liability was fully reduced reflecting payments made to vendors, resulting in no balance at December 31, 2018. Additionally, the Company incurred $0.2 million of capital expenditures in 2018, in relation to the lining of the Company's fresh water lagoons. The site investigation is ongoing. The Company cannot be sure that costs will not exceed the current estimates until this matter is closed with the NHDES, nor that 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, 2019
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 six months ended June 30, 2019 and 2018 : 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, 2017 $ (2,221 ) $ (18,049 ) $ 122 $ (20,148 ) Other comprehensive income (8,604 ) — 75 (c) (8,529 ) Amounts reclassified from accumulated other comprehensive loss — 397 (a) — 397 Balance at June 30, 2018 (10,825 ) (17,652 ) 197 (28,280 ) Balance at December 31, 2018 (18,458 ) (22,253 ) (1,974 ) (42,685 ) Other comprehensive loss 2,330 — (2,026 ) (c) 304 Amounts reclassified from accumulated other comprehensive loss — 19,374 (b) — 19,374 Balance at June 30, 2019 $ (16,128 ) $ (2,879 ) $ (4,000 ) $ (23,007 ) (a) Amount represents amortization of actuarial losses, a component of net periodic benefit cost. This amount was $0.4 million , net of $0.1 million tax benefit, for the six months ended June 30, 2018 . (b) Amount represents the settlement of the Lydall Pension Plan in the second quarter of 2019. This amount was $19.0 million , net of $11.5 million tax benefit, for the six months ended June 30, 2019 . Amount also represents amortization of actuarial losses, a component of net periodic benefit cost during the first five months of fiscal year 2019 prior to the plan termination. This amount was $0.4 million , net of $0.1 million tax benefit. (c) Amount represents unrealized gains (losses) on the fair value of hedging activities, net of taxes, for the six months ended June 30, 2019 and 2018 .

Basis of Financial Statement _2

Basis of Financial Statement Presentation (Policies)	6 Months Ended
	Jun. 30, 2019
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 Interface have been included in the Consolidated Statements of Operations beginning on the date of acquisition. The year-end Condensed Consolidated Balance Sheet was derived from the audited financial statements for the year ended December 31, 2018 , but does not include all disclosures required by U.S. GAAP. 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, 2018 .
Recent Accounting Pronouncements	Recent Accounting Pronouncements Effective January 1, 2019, the Company adopted the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, "Leases (Topic 842)", along with several additional clarification ASU's issued during 2018, collectively, "New Lease Standard". The New Lease Standard 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 New Lease Standard also requires 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. The Company's adoption of the New Lease Standard was on a modified retrospective basis and did not have any impact on the Company's 2018 financial statements and disclosures. As part of the adoption of the New Lease Standard, the Company elected the package of practical expedients which allowed the Company to not re-assess 1) if any existing arrangements contained a lease, 2) the lease classification of any existing leases and 3) initial direct costs for any existing lease. The Company also elected the practical expedient which allows use of hindsight in determining the lease term for leases in existence at the date of adoption. Effective January 1, 2019, the Company reported lease right-of-use assets and lease liabilities on the Company's Condensed Consolidated Balance Sheets. Adoption of the New Lease Standard did not change the balances reported in the Company's 2019 Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Cash Flows, or Condensed Statements of Comprehensive Income. Please refer to Footnote 8 "Leases" for additional information required as part of the adoption of the New Lease Standard. Effective January 1, 2019, the Company adopted the FASB issued ASU No. 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Account for Hedging Activities". This ASU provides various improvements revolving around the financial reporting of hedging relationships that requires an entity to amend the presentation and disclosure of hedging activities to better portray the economic results of an entity's risk management activities in its financial statements. The adoption of this ASU did not have any impact on the Company’s consolidated financial statements and disclosures. Effective January 1, 2019, the Company adopted the FASB issued ASU No. 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income". This ASU allows for reclassification of stranded tax effects resulting from the 2017 Tax Cuts and Jobs Act from accumulated other comprehensive income to retained earnings, but does not require the reclassification. The Company elected not to reclassify the income tax effects of the 2017 Tax Cuts and Jobs Act from accumulated other comprehensive income to retained earnings. Effective January 1, 2019, the Company adopted the FASB issued ASU No. 2018-07, "Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting". This ASU expands the guidance for stock-based compensation to include share-based payment transactions for acquiring goods and services from nonemployees. The adoption of this ASU did not have any impact on the Company’s consolidated financial statements and disclosures. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326)". The new standard amends guidance on reporting credit losses for assets held at amortized cost basis. This ASU is effective for financial statements issued for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is currently evaluating the impact this guidance may have on its consolidated financial statements and disclosures. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement", which adds, amends and removes certain disclosure requirements related to fair value measurements. Among other changes, this standard requires certain additional disclosure surrounding Level 3 assets, including changes in unrealized gains or losses in other comprehensive income and certain inputs in those measurements. This ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Certain amended or eliminated disclosures in this standard may be adopted early, while certain additional disclosure requirements in this standard can be adopted on its effective date. In addition, certain changes in the standard require retrospective adoption, while other changes must be adopted prospectively. The Company is currently evaluating the impact of this update on its consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU No. 2018-14, "Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans." This ASU requires entities to disclose the weighted-average interest crediting rates for cash balance plans and other plans with promised interest crediting rates. This ASU also requires entities to disclose an explanation for significant gains and losses related to changes in the benefit obligation for the period. This ASU is effective for fiscal years beginning after December 15, 2020 with early adoption permitted. The Company is currently evaluating the method and impact the adoption of this ASU will have on its consolidated financial statements and disclosures. In August 2018, the FASB issued ASU 2018 - 15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40); Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The amendments in this update require implementation costs incurred by customers in cloud computing arrangements (i.e., hosting arrangements) to be capitalized under the same premises of authoritative guidance for internal-use software, and deferred over the noncancellable term of the cloud computing arrangement plus any option renewal periods that are reasonably certain to be exercised by the customer or for which the exercise is controlled by the service provider. The Company is required to adopt this new guidance in the first quarter of 2020. Early adoption is permitted. The Company is currently evaluating the impact of this update on its consolidated financial statements and related disclosures.
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 enters 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.

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Schedule of Contract Assets and Liabilities	Contract assets and liabilities consisted of the following: In thousands June 30, 2019 December 31, 2018 Dollar Change Contract assets $ 21,566 $ 23,040 $ (1,474 ) Contract liabilities $ 2,707 $ 4,537 $ (1,830 )
Schedule of Disaggregation of Revenue by Geographical Region	Disaggregated revenue by geographical region for the quarters and six months ended June 30, 2019 and 2018 were as follows: Quarter Ended June 30, 2019 In thousands Performance Materials Technical Nonwovens Thermal Acoustical Solutions Eliminations and Other Consolidated Net Sales North America $ 47,822 $ 42,667 $ 64,235 $ (6,466 ) $ 148,258 Europe 15,729 17,791 25,203 (175 ) 58,548 Asia 1,551 8,620 3,834 — 14,005 Total Net Sales $ 65,102 $ 69,078 $ 93,272 $ (6,641 ) $ 220,811 Quarter Ended June 30, 2018 In thousands Performance Materials Technical Nonwovens Thermal Acoustical Solutions Eliminations and Other Consolidated Net Sales North America $ 20,879 $ 45,564 $ 61,922 $ (6,533 ) $ 121,832 Europe 10,355 18,053 24,515 (169 ) 52,754 Asia — 8,095 3,732 — 11,827 Total Net Sales $ 31,234 $ 71,712 $ 90,169 $ (6,702 ) $ 186,413 Six Months Ended June 30, 2019 In thousands Performance Materials Technical Nonwovens Thermal Acoustical Solutions Eliminations and Other Consolidated Net Sales North America $ 94,199 $ 79,856 $ 127,837 $ (12,734 ) $ 289,158 Europe 32,386 36,840 51,645 (381 ) 120,490 Asia 3,097 17,988 8,103 — 29,188 Total Net Sales $ 129,682 $ 134,684 $ 187,585 $ (13,115 ) $ 438,836 Six Months Ended June 30, 2018 In thousands Performance Materials Technical Nonwovens Thermal Acoustical Solutions Eliminations and Other Consolidated Net Sales North America $ 40,040 $ 84,697 $ 131,901 $ (14,359 ) $ 242,279 Europe 21,887 37,439 52,570 (354 ) 111,542 Asia — 17,117 7,135 — 24,252 Total Net Sales $ 61,927 $ 139,253 $ 191,606 $ (14,713 ) $ 378,073

Acquisitions and Divestiture (T

Acquisitions and Divestiture (Tables)	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table presents the preliminary determination of the fair value of identifiable assets acquired and liabilities assumed from the Company's acquisition of Interface. The final determination of the fair value of certain assets and liabilities will be completed within the one year measurement period as required by the FASB ASC Topic 805, “Business Combinations.” As the Company finalizes the fair value of assets acquired and liabilities assumed, additional purchase price adjustments may be recorded during the measurement period within one year of the acquisition date. Fair value estimates are based on a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. The judgments used to determine the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can materially impact the Company's results of operations. The finalization of the purchase accounting assessment may result in a change in the valuation of assets acquired and liabilities assumed and may have a material impact on the Company's results of operations and financial position. In thousands Accounts receivable $ 25,182 Inventories 17,013 Prepaid expenses and other current assets 2,382 Property, plant and equipment 40,902 Goodwill (Note 5) 130,346 Other intangible assets (Note 5) 106,900 Other assets 308 Total assets acquired, net of cash acquired $ 323,033 Current liabilities $ (11,319 ) Deferred tax liabilities (24,678 ) Benefit plan liabilities (Note 12) (19,002 ) Other long-term liabilities (1,031 ) Total liabilities assumed (56,030 ) Total purchase price, net of cash acquired $ 267,003
Schedule of Unaudited Pro Forma Operating Results	The following table reflects the unaudited actual results of the Company for the quarter and six months ended June 30, 2019 and the pro forma operating results of the Company for the quarter and six months ended June 30, 2018 , which gives effect to the acquisition of Interface as if it had occurred on January 1, 2017. The pro forma information includes the historical financial results of the Company and Interface. The pro forma results are not necessarily indicative of the operating results that would have occurred had the acquisition been effective January 1, 2017, 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 acquisition. Quarter Ended Six Months Ended (Actual) (Pro Forma) (Actual) (Pro Forma) In thousands 2019 2018 2019 2018 Net sales $ 220,811 $ 226,404 $ 438,836 $ 457,481 Net (loss) income $ (6,946 ) $ 11,589 $ (3,056 ) $ 22,518 Earnings per share: Basic $ (0.40 ) $ 0.67 $ (0.18 ) $ 1.31 Diluted $ (0.40 ) $ 0.67 $ (0.18 ) $ 1.30 Basic 17,267 17,196 17,260 17,178 Diluted 17,267 17,335 17,260 17,334

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories as of June 30, 2019 and December 31, 2018 were as follows: In thousands June 30, December 31, Raw materials $ 41,108 $ 37,731 Work in process 16,527 18,296 Finished goods 30,597 28,438 Total inventories $ 88,232 $ 84,465

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Carrying Amount of Goodwill by Segment	The changes in the carrying amount of goodwill by segment as of and for the six months ended June 30, 2019 were as follows: In thousands December 31, Currency translation adjustments Reductions June 30, Performance Materials $ 144,626 $ (84 ) $ (65 ) $ 144,477 Technical Nonwovens 52,337 982 — 53,319 Total goodwill $ 196,963 $ 898 $ (65 ) $ 197,796
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, 2019 and December 31, 2018 : June 30, 2019 December 31, 2018 In thousands Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Amortized intangible assets Customer Relationships $ 142,418 $ (21,134 ) $ 141,455 $ (11,453 ) Patents 4,366 (3,841 ) 4,333 (3,816 ) Technology 2,500 (898 ) 2,500 (810 ) Trade Names 7,302 (4,017 ) 7,235 (2,840 ) License Agreements 616 (616 ) 619 (619 ) Other 559 (559 ) 561 (561 ) Total amortized intangible assets $ 157,761 $ (31,065 ) $ 156,703 $ (20,099 )

Long-term Debt and Financing _2

Long-term Debt and Financing Arrangements (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Schedule of Maturities of Long-term Debt	Total outstanding debt consists of: In thousands Effective Rate Maturity June 30, 2019 December 31, 2018 Revolver loan 4.40 % 8/31/2023 $ 138,000 $ 138,000 Term loan, net of debt issuance costs 4.40 % 8/31/2023 161,552 186,498 Finance leases 0.00% - 2.09% 2019 - 2020 122 315 299,674 324,813 Less portion due within one year (10,001 ) (10,172 ) Total long-term debt, net of debt issuance costs $ 289,673 $ 314,641

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2019
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, 2019 December 31, 2018 In thousands Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives Derivatives designated as hedging instruments: Interest rate contracts $ 34 $ 5,263 $ 179 $ 2,738 Total derivatives $ 34 $ 5,263 $ 179 $ 2,738
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, 2019 December 31, 2018 In thousands Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives Derivatives designated as hedging instruments: Interest rate contracts $ 34 $ 5,263 $ 179 $ 2,738 Total derivatives $ 34 $ 5,263 $ 179 $ 2,738
Schedule of Cash Flow Hedges included in Accumulated Other Comprehensive Income (Loss)	The following table sets forth the income recorded in accumulated other comprehensive (loss) income, net of tax, for the quarters and six months ended June 30, 2019 and 2018 for derivatives held by the Company and designated as hedging instruments: Quarters Ended June 30, Six Months Ended June 30, In thousands 2019 2018 2019 2018 Cash flow hedges: Interest rate contracts $ (1,351 ) $ (27 ) $ (2,026 ) $ 75 $ (1,351 ) (27 ) $ (2,026 ) $ 75

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Schedule of Components of Lease Expense	The components of lease expense are as follows: In thousands Quarter Ended Six Months Ended Finance lease expense: Amortization of right-of-use assets $ 16 $ 49 Interest on lease liabilities — 1 Operating lease expense 1,605 3,249 Short-term lease expense 244 468 Variable lease expense 18 54 Total lease expense $ 1,883 $ 3,821
Schedule of Supplemental Balance Sheet Information Related to Leases	Supplemental balance sheet information related to leases are as follows: In thousands, except lease term June 30, 2019 Operating leases: Operating lease right-of-use assets $ 27,070 Short-term lease liabilities, included in "Other accrued liabilities" $ 5,176 Long-term lease liabilities 22,006 Total operating lease liabilities $ 27,182 Finance leases: Property, plant and equipment $ 740 Accumulated depreciation (195 ) Property, plant and equipment, net $ 545 Short-term lease liabilities, included in debt $ 109 Long-term lease liabilities, included in debt 13 Total finance lease liabilities $ 122 Weighted average remaining lease term: Operating leases 7.5 years Finance leases 12.0 years
Schedule of Supplemental Cash Flow Information Related to Leases	Supplemental cash flow information related to leases are as follows: Six Months Ended June 30, In thousands 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,162 Operating cash flows from finance leases 1 Financing cash flows from finance leases 188 Right-of-use assets obtained in exchange for lease obligations: Operating leases 1,676 Finance leases —
Schedule of Maturities of Operating Lease Liabilities	As of June 30, 2019 , future lease payments maturities were as follows: In thousands Years Ending December 31, Operating Leases Finance Leases 2019 (excluding the six months ended June 30, 2019) $ 3,223 $ 89 2020 5,723 34 2021 4,408 — 2022 3,643 — 2023 2,753 — Thereafter 12,822 — Total lease payments 32,572 123 Less imputed interest (5,390 ) (1 ) Total discounted future lease payments $ 27,182 $ 122 As of December 31, 2018 , future lease payment maturities were as follows: In thousands Years Ending December 31, Operating Leases Finance Leases 2019 $ 6,004 $ 279 2020 4,871 35 2021 3,877 — 2022 3,226 — 2023 2,617 — Thereafter 11,111 — Total lease payments $ 31,706 $ 314
Schedule of Maturities of Finance Lease Liabilities	As of June 30, 2019 , future lease payments maturities were as follows: In thousands Years Ending December 31, Operating Leases Finance Leases 2019 (excluding the six months ended June 30, 2019) $ 3,223 $ 89 2020 5,723 34 2021 4,408 — 2022 3,643 — 2023 2,753 — Thereafter 12,822 — Total lease payments 32,572 123 Less imputed interest (5,390 ) (1 ) Total discounted future lease payments $ 27,182 $ 122 As of December 31, 2018 , future lease payment maturities were as follows: In thousands Years Ending December 31, Operating Leases Finance Leases 2019 $ 6,004 $ 279 2020 4,871 35 2021 3,877 — 2022 3,226 — 2023 2,617 — Thereafter 11,111 — Total lease payments $ 31,706 $ 314

Equity Compensation Plans (Tabl

Equity Compensation Plans (Tables)	6 Months Ended
	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Schedule of Outstanding and Exercisable Options	The following table is a summary of outstanding and exercisable options as of June 30, 2019 : In thousands except per share amounts Shares Weighted- Average Exercise Price Aggregate Intrinsic Value Outstanding at June 30, 2019 599 $ 30.32 $ 644 Exercisable at June 30, 2019 256 $ 29.89 $ 635 Unvested at June 30, 2019 343 $ 30.64 $ 9

Restructuring (Tables)

Restructuring (Tables)	6 Months Ended
	Jun. 30, 2019
Restructuring and Related Activities [Abstract]
Schedule of 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 Total estimated expenses 1,250 450 2,500 4,200 Expenses incurred through December 31, 2018 787 290 1,882 2,959 Estimated remaining expense at December 31, 2018 463 160 618 1,241 Expense incurred during quarter ended: March 31, 2019 16 — 360 376 June 30, 2019 53 — 44 97 Total pre-tax expense incurred 856 290 2,286 3,432 Estimated remaining expense at June 30, 2019 394 160 214 768
Schedule of Restructuring Reserve by Type of Cost	Accrued restructuring costs were as follows at June 30, 2019 : In thousands Total Balance as of December 31, 2018 $ 147 Pre-tax restructuring expenses, excluding depreciation 473 Cash paid (534 ) Balance as of June 30, 2019 $ 86

Employer Sponsored Benefit Pl_2

Employer Sponsored Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Schedule of Components of Net Periodic Benefit Cost	The following is a summary of the components of net periodic benefit cost for the domestic defined benefit pension plans for the quarters and six months ended June 30, 2019 and 2018 : Quarters Ended June 30, Six Months Ended June 30, In thousands 2019 2018 2019 2018 Components of employer benefit cost Service cost $ 30 $ — $ 60 $ — Interest cost 833 470 1,827 940 Expected return on assets (744 ) (650 ) (1,616 ) (1,300 ) Amortization of actuarial loss 186 256 464 512 Net periodic benefit cost $ 305 $ 76 $ 735 $ 152 Settlement loss 25,515 — 25,515 — Total employer benefit plan cost $ 25,820 $ 76 $ 26,250 $ 152

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Schedule of 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 2019 2018 2019 2018 Basic average common shares outstanding 17,267 17,196 17,260 17,178 Effect of dilutive options and restricted stock awards — 139 — 156 Diluted average common shares outstanding 17,267 17,335 17,260 17,334

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Schedule of Consolidated Net Sales and Operating Income by Segment	Consolidated net sales by segment: Quarters Ended June 30, Six Months Ended June 30, In thousands 2019 2018 2019 2018 Performance Materials Segment (1): Filtration $ 24,732 $ 23,061 $ 48,666 $ 46,203 Sealing and Advanced Solutions 40,370 8,173 81,016 15,724 Performance Materials Segment net sales 65,102 31,234 129,682 61,927 Technical Nonwovens Segment: Industrial Filtration 38,706 39,170 81,070 79,401 Advanced Materials (2) 30,372 32,542 53,614 59,852 Technical Nonwovens Segment net sales 69,078 71,712 134,684 139,253 Thermal Acoustical Solutions Segment: Parts 85,705 82,920 170,281 171,041 Tooling 7,567 7,249 17,304 20,565 Thermal Acoustical Solutions Segment net sales 93,272 90,169 187,585 191,606 Eliminations and Other (2) (6,641 ) (6,702 ) (13,115 ) (14,713 ) Consolidated Net Sales $ 220,811 $ 186,413 $ 438,836 $ 378,073 Operating income by segment: Quarters Ended June 30, Six Months Ended June 30, In thousands 2019 2018 2019 2018 Performance Materials (1) $ 3,303 $ 3,649 $ 4,762 $ 6,290 Technical Nonwovens 7,844 6,118 12,578 11,124 Thermal Acoustical Solutions 7,357 8,820 16,848 21,434 Corporate Office Expenses (5,325 ) (6,338 ) (11,959 ) (12,563 ) Consolidated Operating Income $ 13,179 $ 12,249 $ 22,229 $ 26,285 (1) The Performance Materials segment reports the results of Interface and PCC for the period following the date of acquisitions of August 31, 2018 and July 12, 2018, respectively, and included $4.0 million and $8.0 million of incremental intangible assets amortization for the quarter and six months ended June 30, 2019 , respectively. (2) Included in the Technical Nonwovens segment and Eliminations and Other is $4.6 million and $5.8 million in intercompany sales to the Thermal Acoustical Solutions segment for the quarters ended June 30, 2019 and 2018 , respectively, and $9.3 million and $12.9 million for the six months ended June 30, 2019 and 2018 , respectively.

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of 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 six months ended June 30, 2019 and 2018 : 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, 2017 $ (2,221 ) $ (18,049 ) $ 122 $ (20,148 ) Other comprehensive income (8,604 ) — 75 (c) (8,529 ) Amounts reclassified from accumulated other comprehensive loss — 397 (a) — 397 Balance at June 30, 2018 (10,825 ) (17,652 ) 197 (28,280 ) Balance at December 31, 2018 (18,458 ) (22,253 ) (1,974 ) (42,685 ) Other comprehensive loss 2,330 — (2,026 ) (c) 304 Amounts reclassified from accumulated other comprehensive loss — 19,374 (b) — 19,374 Balance at June 30, 2019 $ (16,128 ) $ (2,879 ) $ (4,000 ) $ (23,007 ) (a) Amount represents amortization of actuarial losses, a component of net periodic benefit cost. This amount was $0.4 million , net of $0.1 million tax benefit, for the six months ended June 30, 2018 . (b) Amount represents the settlement of the Lydall Pension Plan in the second quarter of 2019. This amount was $19.0 million , net of $11.5 million tax benefit, for the six months ended June 30, 2019 . Amount also represents amortization of actuarial losses, a component of net periodic benefit cost during the first five months of fiscal year 2019 prior to the plan termination. This amount was $0.4 million , net of $0.1 million tax benefit. (c) Amount represents unrealized gains (losses) on the fair value of hedging activities, net of taxes, for the six months ended June 30, 2019 and 2018 .

Basis of Financial Statement _3

Basis of Financial Statement Presentation - Narrative (Details) - Interface - USD ($) $ in Millions	Aug. 31, 2018	Jun. 30, 2019
New Accounting Pronouncement, Early Adoption [Line Items]
Business acquisitions, net of cash acquired		$ 267
Cash acquired from acquisition	$ 5.2

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Revenue from Contract with Customer [Abstract]
Increase (decrease) in contract assets	$ (1,474)
Increase (decrease) in contract liabilities	(1,830)
Revenue recognized from contracts with customers	$ 3,400

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract assets	$ 21,566	$ 23,040
Dollar change in contract assets	(1,474)
Contract liabilities	2,707	$ 4,537
Dollar change in contract liabilities	$ (1,830)

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Disaggregation of Revenue by Geographical Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 220,811	$ 186,413	$ 438,836	$ 378,073
North America
Disaggregation of Revenue [Line Items]
Net sales	148,258	121,832	289,158	242,279
Europe
Disaggregation of Revenue [Line Items]
Net sales	58,548	52,754	120,490	111,542
Asia
Disaggregation of Revenue [Line Items]
Net sales	14,005	11,827	29,188	24,252
Operating Segments | Performance Materials
Disaggregation of Revenue [Line Items]
Net sales	65,102	31,234	129,682	61,927
Operating Segments | Performance Materials | North America
Disaggregation of Revenue [Line Items]
Net sales	47,822	20,879	94,199	40,040
Operating Segments | Performance Materials | Europe
Disaggregation of Revenue [Line Items]
Net sales	15,729	10,355	32,386	21,887
Operating Segments | Performance Materials | Asia
Disaggregation of Revenue [Line Items]
Net sales	1,551	0	3,097	0
Operating Segments | Technical Nonwovens
Disaggregation of Revenue [Line Items]
Net sales	69,078	71,712	134,684	139,253
Operating Segments | Technical Nonwovens | North America
Disaggregation of Revenue [Line Items]
Net sales	42,667	45,564	79,856	84,697
Operating Segments | Technical Nonwovens | Europe
Disaggregation of Revenue [Line Items]
Net sales	17,791	18,053	36,840	37,439
Operating Segments | Technical Nonwovens | Asia
Disaggregation of Revenue [Line Items]
Net sales	8,620	8,095	17,988	17,117
Operating Segments | Thermal Acoustical Solutions
Disaggregation of Revenue [Line Items]
Net sales	93,272	90,169	187,585	191,606
Operating Segments | Thermal Acoustical Solutions | North America
Disaggregation of Revenue [Line Items]
Net sales	64,235	61,922	127,837	131,901
Operating Segments | Thermal Acoustical Solutions | Europe
Disaggregation of Revenue [Line Items]
Net sales	25,203	24,515	51,645	52,570
Operating Segments | Thermal Acoustical Solutions | Asia
Disaggregation of Revenue [Line Items]
Net sales	3,834	3,732	8,103	7,135
Eliminations and Other
Disaggregation of Revenue [Line Items]
Net sales	(6,641)	(6,702)	(13,115)	(14,713)
Eliminations and Other | North America
Disaggregation of Revenue [Line Items]
Net sales	(6,466)	(6,533)	(12,734)	(14,359)
Eliminations and Other | Europe
Disaggregation of Revenue [Line Items]
Net sales	(175)	(169)	(381)	(354)
Eliminations and Other | Asia
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0

Acquisitions and Divestiture -

Acquisitions and Divestiture - Narrative (Details)	May 09, 2019USD ($)annual_payment	Aug. 31, 2018USD ($)	Jul. 12, 2018USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Aug. 30, 2018USD ($)	Jul. 06, 2016USD ($)
Business Acquisition [Line Items]
Business acquisitions, net of cash acquired						$ (869,000)	$ 0
Interest expense				$ 3,731,000	$ 572,000	7,359,000	1,112,000
Gain on sale of business, net of income taxes						1,459,000	0
Revolving Credit Facility | Amended Credit Facility
Business Acquisition [Line Items]
Maximum borrowing capacity		$ 450,000,000						$ 175,000,000	$ 450,000,000
Interface
Business Acquisition [Line Items]
Voting interest acquired (as a percent)		100.00%
Business acquisitions, net of cash acquired		$ 268,400,000
Cash acquired from acquisition		5,200,000
Working capital adjustment				1,400,000
Final purchase price				267,000,000
Purchase price borrowings		$ 261,400,000
Net sales of acquiree since acquisition date				32,700,000	0	65,600,000	0
Operating income (loss) of acquiree since acquisition date				(100,000)	0	(700,000)	0
Amortization of intangible assets				3,100,000	3,000,000	6,100,000	6,100,000
Interest expense				2,600,000	2,100,000	5,200,000	4,200,000
Additional pro-forma net income (loss)					$ (600,000)		$ (2,100,000)
Precision Filtration Division of Precision Custom Coatings
Business Acquisition [Line Items]
Payments to acquire business			$ 1,600,000
Post-closing adjustment			$ 2,000,000
Selling, Product Development and Administrative Expenses | Interface
Business Acquisition [Line Items]
Amortization of intangible assets				$ 4,000,000		$ 8,000,000
Geosol | Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Cash purchase price of divestiture	$ 3,000,000
Consideration withheld	$ 400,000
Business Combination, Consideration Withheld, Number of Annual Payments | annual_payment	3
Annual payment of consideration withheld	$ 100,000
Pre-tax gain on sale of business	1,500,000
Gain on sale of business, net of income taxes	$ 1,300,000

Acquisitions and Divestiture _2

Acquisitions and Divestiture - Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Aug. 31, 2018
Business Acquisition [Line Items]
Goodwill (Note 5)	$ 197,796	$ 196,963
Interface
Business Acquisition [Line Items]
Accounts receivable			$ 25,182
Inventories			17,013
Prepaid expenses and other current assets			2,382
Property, plant and equipment			40,902
Goodwill (Note 5)			130,346
Other intangible assets (Note 5)			106,900
Other assets			308
Total assets acquired, net of cash acquired			323,033
Current liabilities			(11,319)
Deferred tax liabilities			(24,678)
Benefit plan liabilities (Note 12)			(19,002)
Other long-term liabilities			(1,031)
Total liabilities assumed			(56,030)
Total purchase price, net of cash acquired			$ 267,003

Acquisitions and Divestiture _3

Acquisitions and Divestiture - Unaudited Pro Forma Operating Results (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
(Actual)
Net sales	$ 220,811		$ 186,413		$ 438,836	$ 378,073
Net (loss) income	$ (6,946)	$ 3,890	$ 10,450	$ 11,054	$ (3,056)	$ 21,504
Earnings per share:
Basic (USD per share)	$ (0.40)		$ 0.61		$ (0.18)	$ 1.25
Diluted (USD per share)	$ (0.40)		$ 0.60		$ (0.18)	$ 1.24
Basic (shares)	17,267		17,196		17,260	17,178
Diluted (shares)	17,267		17,335		17,260	17,334
Interface
(Actual)
Net sales	$ 220,811				$ 438,836
Net (loss) income	$ (6,946)				$ (3,056)
(Pro Forma)
Net sales			$ 226,404			$ 457,481
Net (loss) income			$ 11,589			$ 22,518
Earnings per share:
Basic (USD per share)			$ 0.67			$ 1.31
Diluted (USD per share)			$ 0.67			$ 1.30
Basic (shares)			17,196			17,178
Diluted (shares)			17,335			17,334

Inventories - Narrative (Detail

Inventories - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Gross tooling inventory	$ 2.5	$ 4.3

Inventories - Summary (Details)

Inventories - Summary (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Inventory, Net [Abstract]
Raw materials	$ 41,108	$ 37,731
Work in process	16,527	18,296
Finished goods	30,597	28,438
Total inventories	$ 88,232	$ 84,465

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Goodwill [Line Items]
Additions (reductions) in goodwill		$ (65)
Performance Materials
Goodwill [Line Items]
Additions (reductions) in goodwill		(65)
Interface Performance Materials
Goodwill [Line Items]
Additions (reductions) in goodwill		$ (700)
Hollingsworth & Vose Company
Goodwill [Line Items]
Additions (reductions) in goodwill	$ 600

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 196,963
Currency translation adjustments	898
Reductions	(65)
Balance at end of period	197,796
Performance Materials
Goodwill [Roll Forward]
Balance at beginning of period	144,626
Currency translation adjustments	(84)
Reductions	(65)
Balance at end of period	144,477
Technical Nonwovens
Goodwill [Roll Forward]
Balance at beginning of period	52,337
Currency translation adjustments	982
Reductions	0
Balance at end of period	$ 53,319

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Amortization of the Acquired Intangible Assets Other than Goodwill (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Amortized intangible assets
Gross Carrying Amount	$ 157,761	$ 156,703
Accumulated Amortization	(31,065)	(20,099)
Customer Relationships
Amortized intangible assets
Gross Carrying Amount	142,418	141,455
Accumulated Amortization	(21,134)	(11,453)
Patents
Amortized intangible assets
Gross Carrying Amount	4,366	4,333
Accumulated Amortization	(3,841)	(3,816)
Technology
Amortized intangible assets
Gross Carrying Amount	2,500	2,500
Accumulated Amortization	(898)	(810)
Trade Names
Amortized intangible assets
Gross Carrying Amount	7,302	7,235
Accumulated Amortization	(4,017)	(2,840)
License Agreements
Amortized intangible assets
Gross Carrying Amount	616	619
Accumulated Amortization	(616)	(619)
Other
Amortized intangible assets
Gross Carrying Amount	559	561
Accumulated Amortization	$ (559)	$ (561)

Long-term Debt and Financing _3

Long-term Debt and Financing Arrangements - Narrative (Details)	Aug. 31, 2018USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2018	Aug. 30, 2018USD ($)	Jul. 06, 2016USD ($)
Debt Instrument [Line Items]
Weighted-average interest rate (as a percent)		4.30%	3.40%
Amended Credit Facility
Debt Instrument [Line Items]
Borrowings outstanding under term loan	$ 250,000,000
Outstanding standby letters of credit		$ 3,800,000
Term Loan Due August 31, 2023
Debt Instrument [Line Items]
Borrowings outstanding under term loan	200,000,000	162,000,000
Amount of quarterly repayments of term commitment	2,500,000
Debt issuance costs		$ 500,000
Revolving Credit Facility | Amended Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	450,000,000			$ 175,000,000	$ 450,000,000
Maximum borrowing capacity possible value of increase (not to exceed)	$ 150,000,000
Credit facility fixed charge coverage ratio (not less than)		1.25
Required consolidated leverage ratio as of end of each fiscal quarter (no greater than)		3.5
Remaining borrowing capacity		$ 108,200,000
Outstanding borrowings		$ 300,000,000
Revolving Credit Facility | Amended Credit Facility | Minimum
Debt Instrument [Line Items]
Quarterly unused line commitment fee (as a percent)		0.15%
Revolving Credit Facility | Amended Credit Facility | Maximum
Debt Instrument [Line Items]
Quarterly unused line commitment fee (as a percent)		0.275%
Revolving Credit Facility | Amended Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.00%
Revolving Credit Facility | Amended Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		1.25%
Revolving Credit Facility | Amended Credit Facility | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.50%
Revolving Credit Facility | Amended Credit Facility | Eurocurrency Rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		1.00%
Revolving Credit Facility | Amended Credit Facility | Eurocurrency Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.75%
Revolving Credit Facility | Amended Credit Facility | Eurocurrency Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		2.00%
Foreign Credit Facility
Debt Instrument [Line Items]
Remaining borrowing capacity		$ 8,200,000
Outstanding borrowings		100,000
Outstanding standby letters of credit		$ 1,800,000

Long-term Debt and Financing _4

Long-term Debt and Financing Arrangements - Maturities of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term debt	$ 299,674	$ 324,813
Less portion due within one year	(10,001)	(10,172)
Total long-term debt, net of debt issuance costs	$ 289,673	314,641
Term loan, net of debt issuance costs
Debt Instrument [Line Items]
Debt instrument, effective interest rate (as a percent)	4.40%
Long-term debt	$ 161,552	186,498
Finance leases
Debt Instrument [Line Items]
Long-term debt	$ 122	315
Revolving Credit Facility | Revolver loan
Debt Instrument [Line Items]
Debt instrument, effective interest rate (as a percent)	4.40%
Long-term debt	$ 138,000	$ 138,000
Minimum | Finance leases
Debt Instrument [Line Items]
Debt instrument, effective interest rate (as a percent)	0.00%
Maximum | Finance leases
Debt Instrument [Line Items]
Debt instrument, effective interest rate (as a percent)	2.09%

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) - Interest Rate Swap - USD ($)	1 Months Ended		3 Months Ended
	Nov. 30, 2018	Apr. 30, 2017	Jun. 30, 2019
Derivative [Line Items]
Derivative agreement term	5 years	3 years
Derivative notional amount	$ 139,000,000	$ 60,000,000
Fixed rate of derivatives (as a percent)	3.09%	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, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 34	$ 179
Liability Derivatives	5,263	2,738
Interest rate contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives	34	179
Liability Derivatives	$ 5,263	$ 2,738

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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income	$ (1,351)	$ (27)	$ (2,026)	$ 75
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income	$ (1,351)	$ (27)	$ (2,026)	$ 75

Leases - Narrative (Details)

Leases - Narrative (Details)	6 Months Ended
	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Termination period of leases	1 year
Weighted-average discount rate used for operating leases (as a percent)	4.39%
Weighted-average discount rate used for finance leases (as a percent)	1.78%
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	14 years
Renewal term of operating leases	7 years
Renewal term of finance leases	7 years

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Finance lease expense:
Amortization of right-of-use assets	$ 16	$ 49
Interest on lease liabilities	0	1
Operating lease expense	1,605	3,249
Short-term lease expense	244	468
Variable lease expense	18	54
Total lease expense	$ 1,883	$ 3,821

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating leases:
Operating lease right-of-use assets	$ 27,070	$ 0
Short-term lease liabilities, included in Other accrued liabilities	5,176
Long-term lease liabilities	22,006	$ 0
Total operating lease liabilities	27,182
Finance leases:
Property, plant and equipment	740
Accumulated depreciation	(195)
Property, plant and equipment, net	545
Short-term lease liabilities, included in debt	109
Long-term lease liabilities, included in debt	13
Total finance lease liabilities	$ 122
Weighted average remaining lease term:
Operating leases	7 years 6 months
Finance leases	12 years

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 3,162
Operating cash flows from finance leases	1
Financing cash flows from finance leases	188
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	1,676
Finance leases	$ 0

Leases - Undiscounted Future Le

Leases - Undiscounted Future Lease Payments Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating Leases after Adoption of ASC Topic 842
2019 (excluding the six months ended June 30, 2019)	$ 3,223
2020	5,723
2021	4,408
2022	3,643
2023	2,753
Thereafter	12,822
Total lease payments	32,572
Less imputed interest	(5,390)
Total discounted future lease payments	27,182
Finance Leases after Adoption of ASC Topic 842
2019 (excluding the six months ended June 30, 2019)	89
2020	34
2021	0
2022	0
2023	0
Thereafter	0
Total lease payments	123
Less imputed interest	(1)
Total discounted future lease payments	$ 122
Operating Leases before Adoption of ASC Topic 842
2019		$ 6,004
2020		4,871
2021		3,877
2022		3,226
2023		2,617
Thereafter		11,111
Total lease payments		31,706
Capital Leases before Adoption of ASC Topic 842
2019		279
2020		35
2021		0
2022		0
2023		0
Thereafter		0
Total lease payments		$ 314

Equity Compensation Plans - Nar

Equity Compensation Plans - Narrative (Details) - USD ($) $ in Millions	Apr. 27, 2012	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 0.5	$ 1.4	$ 1.5	$ 2.6
Stock options granted (shares)			0	0	11,180
Stock options exercised (shares)			0	3,325	27,041
Cash received from exercise of stock option				$ 0	$ 0.7
Intrinsic value of options exercised				0.1	0.7
Intrinsic value of stock options exercised, tax benefit				$ 0.1	$ 0.1
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, term				10 years
Total unrecognized compensation cost		3		$ 3
Weighted average expected amortization period				2 years 8 months 12 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		$ 3.9		$ 3.9
Weighted average expected amortization period				1 year 10 months 24 days
Unvested restricted stock awards (shares)		265,816		265,816
Time Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (shares)		0	0	33,932	8,106
Restricted shares vested (shares)		0	0	5,468	5,164
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	0	15,190
Restricted shares vested (shares)		0	0		48,035
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 - Out

Equity Compensation Plans - Outstanding and Exercisable Options (Details) $ / shares in Units, shares in Thousands, $ in Thousands	Jun. 30, 2019USD ($)$ / sharesshares
Shares
Outstanding (shares) | shares	599
Exercisable (shares) | shares	256
Unvested (shares) | shares	343
Weighted- Average Exercise Price
Outstanding (USD per share) | $ / shares	$ 30.32
Exercisable (USD per share) | $ / shares	29.89
Unvested (USD per share) | $ / shares	$ 30.64
Aggregate Intrinsic Value
Outstanding | $	$ 644
Exercisable | $	635
Unvested | $	$ 9

Stock Repurchases - Narrative (

Stock Repurchases - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)shares
Equity [Abstract]
Stock repurchased during period (shares) | shares	2,124
Aggregate purchase price of shares repurchased (less than) | $	$ 0.1

Restructuring - Narrative (Deta

Restructuring - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended		9 Months Ended
	Jun. 30, 2019	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2017	Apr. 30, 2017
Restructuring Cost and Reserve [Line Items]
Cash paid	$ 200		$ 500
Technical Nonwovens
Restructuring Cost and Reserve [Line Items]
Estimated pre-tax restructuring expense	4,200		4,200
Restructuring, expected costs resulting in future cash expenditures					$ 3,700
Cash paid			534	$ 3,800
Technical Nonwovens | Selling, Product Development and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring expenses, excluding depreciation	$ 100		$ 500
Forecast | Technical Nonwovens
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring expenses, excluding depreciation		$ 800

Restructuring - Actual and Esti

Restructuring - Actual and Estimated Pre-Tax Expenses (Details) - Technical Nonwovens - USD ($) $ in Thousands	3 Months Ended		12 Months Ended	18 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2019	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Total estimated expenses					$ 4,200
Total pre-tax expense incurred	$ 97	$ 376	$ 2,959	$ 3,432
Estimated remaining expense	768		1,241	768
Severance and Related Expenses
Restructuring Cost and Reserve [Line Items]
Total estimated expenses					1,250
Total pre-tax expense incurred	53	16	787	856
Estimated remaining expense	394		463	394
Contract Termination Expenses
Restructuring Cost and Reserve [Line Items]
Total estimated expenses					450
Total pre-tax expense incurred	0	0	290	290
Estimated remaining expense	160		160	160
Facility Exit, Move and Set-up Expenses
Restructuring Cost and Reserve [Line Items]
Total estimated expenses					$ 2,500
Total pre-tax expense incurred	44	$ 360	1,882	2,286
Estimated remaining expense	$ 214		$ 618	$ 214

Restructuring - Accrued Restruc

Restructuring - Accrued Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Cash paid	$ (200)	$ (500)
Technical Nonwovens
Restructuring Reserve [Roll Forward]
Balance		147
Pre-tax restructuring expenses, excluding depreciation		473
Cash paid		(534)	$ (3,800)
Balance	$ 86	$ 86

Employer Sponsored Benefit Pl_3

Employer Sponsored Benefit Plans - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interface
Defined Benefit Plan Disclosure [Line Items]
Contributions made by company to domestic pension plan	$ 300,000		$ 900,000
Interface | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected employer contributions during remainder of fiscal year	1,000,000		1,000,000
Interface | Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected employer contributions during remainder of fiscal year	2,000,000		2,000,000
United States | Pension plan
Defined Benefit Plan Disclosure [Line Items]
Pre-tax settlement loss	25,500,000
Contributions made by company to domestic pension plan	$ 0	$ 3,000,000	$ 0	$ 4,200,000

Employer Sponsored Benefit Pl_4

Employer Sponsored Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Components of employer benefit cost
Service cost	$ 30	$ 0	$ 60	$ 0
Interest cost	833	470	1,827	940
Expected return on assets	(744)	(650)	(1,616)	(1,300)
Amortization of actuarial loss	186	256	464	512
Total employer benefit plan cost	305	76	735	152
Settlement loss	25,515	0	25,515	0
Total employer benefit plan cost	$ 25,820	$ 76	$ 26,250	$ 152

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ (8,199)		$ 1,655	$ (7,093)	$ 3,778
Tax benefit related to the pension plan settlement				$ 10,500
Effective tax rate (as a percent)	54.00%		13.70%	69.70%	15.00%
Income tax effects of the Tax Cuts and Jobs Act			$ 4,500
Effective tax rate excluding pension plan settlement tax benefit (as a percent)	22.70%			22.50%
Tax benefit related to stock vesting and geographical mix of earnings	$ 900
Valuation allowance activity				$ 1,200
Release of uncertain tax position due to statutory expiration		$ 10,500

Earnings (Loss) Per Share - Nar

Earnings (Loss) Per Share - Narrative (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Dilutive stock options excluded from computation of diluted earnings per share (shares)	54,713		69,730
Stock excluded from computation of diluted earnings per share (shares)	520,189	162,830	521,293	149,940

Earnings (Loss) Per Share - Rec

Earnings (Loss) Per Share - Reconciliation for Basic and Diluted Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Basic average common shares outstanding (shares)	17,267	17,196	17,260	17,178
Effect of dilutive options and restricted stock awards (shares)	0	139	0	156
Diluted average common shares outstanding (shares)	17,267	17,335	17,260	17,334

Segment Information - Summary (

Segment Information - Summary (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 220,811	$ 186,413	$ 438,836	$ 378,073
Operating income	13,179	12,249	22,229	26,285
Operating Segments | Performance Materials
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	65,102	31,234	129,682	61,927
Operating income	3,303	3,649	4,762	6,290
Amortization of intangible assets	4,000		8,000
Operating Segments | Performance Materials | Filtration
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	24,732	23,061	48,666	46,203
Operating Segments | Performance Materials | Sealing and Advanced Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	40,370	8,173	81,016	15,724
Operating Segments | Technical Nonwovens
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	69,078	71,712	134,684	139,253
Operating income	7,844	6,118	12,578	11,124
Operating Segments | Technical Nonwovens | Industrial Filtration
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	38,706	39,170	81,070	79,401
Operating Segments | Technical Nonwovens | Advanced Materials
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	30,372	32,542	53,614	59,852
Intercompany sales	4,600	5,800	9,300	12,900
Operating Segments | Thermal Acoustical Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	93,272	90,169	187,585	191,606
Operating income	7,357	8,820	16,848	21,434
Operating Segments | Thermal Acoustical Solutions | Parts
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	85,705	82,920	170,281	171,041
Operating Segments | Thermal Acoustical Solutions | Tooling
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	7,567	7,249	17,304	20,565
Eliminations and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	(6,641)	(6,702)	(13,115)	(14,713)
Intercompany sales	4,700	7,100	4,700	7,100
Corporate Office Expenses
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating income	$ (5,325)	$ (6,338)	$ (11,959)	$ (12,563)

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - Rochester, New Hampshire - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2018
Loss Contingencies [Line Items]
Expense associated with expected costs of site investigation	$ 200,000	$ 100,000
Capital expenditures		200,000
Environmental Contamination
Loss Contingencies [Line Items]
Accrual for environmental liability, including revision (fully offset)		$ 0

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income (Loss) - Summary (Details) - USD ($) $ in Thousands	5 Months Ended	6 Months Ended
	May 31, 2019	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	$ 369,275	$ 369,275	$ 353,396
Other comprehensive income (loss)		304	(8,529)
Amounts reclassified from accumulated other comprehensive loss		19,374	397
Balance at end of period		387,105	370,715
Loss reclassified from AOCI for defined benefit pension plans	400	19,000	400
Tax benefit reclassified from AOCI for defined benefit pension plans	100	11,500	100
Total Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(42,685)	(42,685)	(20,148)
Balance at end of period		(23,007)	(28,280)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(18,458)	(18,458)	(2,221)
Other comprehensive income (loss)		2,330	(8,604)
Amounts reclassified from accumulated other comprehensive loss		0	0
Balance at end of period		(16,128)	(10,825)
Defined Benefit Pension Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(22,253)	(22,253)	(18,049)
Other comprehensive income (loss)		0	0
Amounts reclassified from accumulated other comprehensive loss		19,374	397
Balance at end of period		(2,879)	(17,652)
Gains and Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	$ (1,974)	(1,974)	122
Other comprehensive income (loss)		(2,026)	75
Amounts reclassified from accumulated other comprehensive loss		0	0
Balance at end of period		$ (4,000)	$ 197

Uncategorized Items - ldl-20196

Label	Element	Value
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 1,598,000
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(183,000)	[1]
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(183,000)	[1]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 1,598,000
[1]	During the quarter ended March 31, 2019, the Company recorded an adjustment reducing retained earnings and contract assets by $0.2 million to correct an error in the adoption of ASC 606.