Lydall (LDL) 10-Q 31 Jul 14 2014 Q2 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 17, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Trading Symbol	'LDL	'
Entity Common Stock, Shares Outstanding	'	17,064,494
Entity Registrant Name	'LYDALL INC /DE/	'
Entity Central Index Key	'0000060977	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended				6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Income Statement [Abstract]	'		'		'		'
Net sales	$148,793		$101,051		$274,019		$200,080
Cost of sales	114,140		78,014		213,167		155,678
Gross profit	34,653		23,037		60,852		44,402
Selling, product development and administrative expenses	22,080		13,516		40,653		28,364
Operating income	12,573	[1]	9,521	[1]	20,199	[1]	16,038	[1]
Interest expense	280		76		492		154
Other expense, net	299		18		354		60
Income before income taxes	11,994		9,427		19,353		15,824
Income tax expense	3,754		3,472		7,397		5,377
Net income	$8,240		$5,955		$11,956		$10,447
Earnings per share:	'		'		'		'
Basic (usd per share)	$0.50		$0.36		$0.72		$0.63
Diluted (usd per share)	$0.49		$0.35		$0.71		$0.62
Weighted average number of common shares outstanding:	'		'		'		'
Basic (in shares)	16,618		16,612		16,580		16,674
Diluted (in shares)	16,980		16,831		16,925		16,927
[1]	Industrial Filtration segment reports results for the period following the date of acquisition of February 20, 2014 through June 30, 2014.

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$8,240	$5,955	$11,956	$10,447
Other comprehensive income:	'	'	'	'
Foreign currency translation adjustments	333	1,036	-3	-998
Pension liability adjustment, net of tax	112	166	223	331
Comprehensive income	$8,685	$7,157	$12,176	$9,780

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$64,425	$75,407
Accounts receivable, less allowances (2014 - $1,245; 2013 - $480)	101,771	52,301
Inventories	51,200	34,917
Prepaid expenses and other current assets	12,087	9,636
Total current assets	229,483	172,261
Property, plant and equipment, at cost	308,858	265,476
Accumulated depreciation	-193,863	-186,613
Net, property, plant and equipment	114,995	78,863
Goodwill	22,263	18,589
Other intangible assets, net	8,761	3,510
Other assets, net	2,063	1,462
Total assets	377,565	274,685
Current liabilities:	'	'
Current portion of long-term debt	678	663
Accounts payable	51,512	29,768
Accrued payroll and other compensation	13,149	10,393
Accrued taxes	1,737	1,816
Other accrued liabilities	6,444	6,044
Total current liabilities	73,520	48,684
Long-term debt	60,703	1,051
Deferred tax liabilities	15,413	8,747
Benefit plan liabilities	10,526	14,097
Other long-term liabilities	3,021	2,019
Commitments and Contingencies	'	'
Stockholders’ equity:	'	'
Preferred stock	0	0
Common stock	2,437	2,410
Capital in excess of par value	64,855	62,284
Retained earnings	232,208	220,252
Accumulated other comprehensive loss	-8,624	-8,844
Treasury stock, at cost	-76,494	-76,015
Total stockholders’ equity	214,382	200,087
Total liabilities and stockholders’ equity	$377,565	$274,685

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Allowances of accounts receivable	$1,245	$480

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net income	$11,956	$10,447
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	8,572	6,541
Inventory step-up amortization	1,806	0
Deferred income taxes	-632	1,477
Stock based compensation	1,303	712
Loss on disposition of property, plant and equipment	0	182
Changes in operating assets and liabilities:	'	'
Accounts receivable	-20,986	-9,809
Inventories	6,920	-6,538
Accounts payable	6,451	1,565
Accrued payroll and other compensation	1,285	192
Accrued taxes	533	-41
Other, net	-3,834	1,752
Net cash provided by operating activities	13,374	6,480
Cash flows from investing activities:	'	'
Business acquisitions, net of cash acquired	-79,157	0
Capital expenditures	-5,626	-5,515
Acquisition earn out payments	0	-158
Net cash used for investing activities	-84,783	-5,673
Cash flows from financing activities:	'	'
Proceeds from borrowings	60,000	0
Debt repayments	-331	-375
Common stock issued	837	912
Common stock repurchased	-479	-6,194
Excess tax benefit on stock awards	459	146
Net cash provided by (used for) financing activities	60,486	-5,511
Effect of exchange rate changes on cash	-59	-377
Decrease in cash and cash equivalents	-10,982	-5,081
Cash and cash equivalents at beginning of period	75,407	63,623
Cash and cash equivalents at end of period	$64,425	$58,542

Basis_of_Financial_Statement_P

Basis of Financial Statement Presentation	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of Financial Statement Presentation	'
	Basis of Financial Statement Presentation
	Description of Business
	Lydall, Inc. and its subsidiaries (collectively, the “Company” or “Lydall”) design and manufacture specialty engineered filtration media, industrial thermal insulating solutions, automotive thermal and acoustical barriers, medical filtration media and devices and biopharmaceutical processing components for thermal/acoustical, filtration/separation, and bio/medical applications.
	On February 20, 2014, the Company completed an acquisition of certain industrial filtration businesses (“Industrial Filtration”) of Andrew Industries Limited, an Altham, United Kingdom based corporation. The Industrial Filtration business serves a global customer base in the manufacture of non-woven felt filtration media and filter bags used primarily in industrial air filtration applications including power, cement, asphalt, incineration, food and pharmaceutical. The Industrial Filtration business is being reported as its own reportable segment since the acquisition date.
	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 all material respects, in accordance with the same accounting principles followed in the preparation of the Company’s annual financial statements for the year ended December 31, 2013. The operating results of the Industrial Filtration segment have been included in the Consolidated Statement of Operations since the date of the acquisition. The year-end Condensed Consolidated Balance Sheet was derived from the December 31, 2013 audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. Management believes that all adjustments, which include only normal recurring adjustments necessary for a fair statement of the Company’s condensed consolidated financial position, results of operations and cash flows for the periods reported, have been included. For further information, refer to the audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.
	Recently Adopted Accounting Pronouncements
	Effective January 1, 2014, the Company adopted the Financial Accounting Standards Board (“FASB”) Accounting Standards Update ("ASU") No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (Topic 740). This ASU required entities to present an unrecognized tax benefit, or a portion of an unrecognized tax benefit, in their financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The objective of this update is to eliminate the diversity in practice in the presentation of unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The adoption of this ASU did not have a significant impact on the Company’s condensed consolidated financial statements.
	In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (Topic 606). This ASU provides guidance for revenue recognition and affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets and supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition,” and most industry-specific guidance. The standard’s core principle is the recognition of revenue when a company transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the current guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. This ASU is effective for fiscal years beginning after December 15, 2016. Early adoption is not permitted.  The Company is currently evaluating the method and impact the adoption of ASU 2014-09 will have on the Company’s condensed consolidated financial statements and disclosures.
	In June 2014, the FASB issued ASU No. 2014-12, “Compensation - Stock Compensation” (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could be Achieved after the Requisite Service Period. This ASU affects entities that grant their employees share-based payments in which terms of the award provide that a performance target that affects vesting could be achieved after the requisite service period. The amendments in this ASU require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. This ASU is effective for fiscal years beginning after December 15, 2015. Early adoption is permitted. The Company is currently evaluating the method and impact the adoption of ASU 2014-12 will have on the Company’s condensed consolidated financial statements and disclosures.

Acquisition

Acquisition	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Acquisition	'
	Acquisition
	On February 20, 2014, the Company completed the acquisition of certain industrial filtration businesses of Andrew Industries Limited, an Altham, United Kingdom based corporation. The Industrial Filtration business serves a global customer base in the manufacture of non-woven felt filtration media and filter bags used primarily in industrial air filtration applications including power, cement, asphalt, incineration, food and pharmaceutical. This business, which strengthened the Company’s position as an industry leading, global provider of filtration and engineered materials products, added complementary and new technologies, and diversified the Company’s end markets and geographic base. The Company acquired the Industrial Filtration business for $86.7 million in cash (including cash acquired of $7.5 million) and with no debt being acquired. The purchase price was financed with a combination of cash on hand and $60.0 million of borrowings through the Company’s amended $100 million credit facility.
	During the three and six months ended June 30, 2014, the Company incurred $0.2 million and $2.6 million of transaction related costs, respectively. These transaction costs include investment banker fees, legal fees and other professional services fees to complete the transaction. These corporate office expenses have been recognized in the Company’s Condensed Consolidated Statements of Operations as selling, product development and administrative expenses.
	The operating results of the Industrial Filtration business have been included in the Condensed Consolidated Statements of Operations since February 20, 2014, the date of the acquisition. The Industrial Filtration business is being reported as a separate reportable segment. For the three and six months ended June 30, 2014, the Industrial Filtration segment reported net sales of $34.1 million and $51.8 million, respectively. For the three and six months ended June 30, 2014, the Industrial Filtration segment reported operating income of $2.2 million and $3.0 million, respectively. Operating income for the three and six months ended June 30, 2014 included $0.5 million and $1.8 million, respectively, of purchase accounting inventory fair value step-up adjustments in cost of sales upon the sale of inventory. The total purchase accounting inventory fair value step-up adjustment included in the balance sheet at the acquisition date was $2.1 million.
	The following table summarizes the fair values of identifiable assets acquired and liabilities assumed at the date of the acquisition:
	In thousands
	Cash	$	7,493
	Accounts Receivable	26,779
	Inventory	25,046
	Other current assets	2,894
	Property, plant and equipment	38,780
	Deferred Taxes	2,501
	Intangible assets (Note 4)	5,596
	Goodwill (Note 4)	3,693
	Total assets acquired	112,782
	Other liabilities	(18,002		)
	Deferred taxes	(8,130		)
	Total liabilities assumed	(26,132		)
	Net assets acquired	$	86,650
	The final purchase price allocation is subject to post-closing adjustments pursuant to the terms of the Sale and Purchase Agreement with Andrews Industries Limited. The Company anticipates that any post-closing adjustment will not be significant to the total purchase price consideration.
	The following table reflects the unaudited pro forma operating results of the Company for the three and six months ended June 30, 2014 and the three and six months ended June 30, 2013, which give effect to the acquisition of Industrial Filtration as if it had occurred on January 1, 2013. The pro forma information includes the historical financial results of the Company and Industrial Filtration. The pro forma results are not necessarily indicative of the operating results that would have occurred had the acquisition been effective January 1, 2013, 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.
		(Unaudited Pro Forma)					(Unaudited Pro Forma)
		Quarter Ended June 30,					Six Months Ended June 30,
	In thousands	2014			2013		2014		2013
	Net Sales	$	148,793		$	134,139	$	291,535	$	263,855
	Net Income	$	8,679		$	7,523	$	16,155	$	10,124
	Earnings per share:
	Basic	$	0.52		$	0.45	$	0.97	$	0.61
	Diluted	$	0.51		$	0.45	$	0.95	$	0.6
	Pro forma earnings during the three months ended June 30, 2014 were adjusted to exclude non-recurring items such as acquisition-related costs of $0.2 million and expense related to the fair value adjustment to inventory of $0.5 million. No amount is included in the pro forma earnings during the three months ended June 30, 2014 related to inventory fair value adjustments which would have been recognized in cost of sales as the corresponding inventory would have been completely sold during 2013.
	Pro forma earnings during the three months ended June 30, 2013 were adjusted to include acquisition-related costs of $0.2 million and expense of $0.1 million related to the amortization of acquired Industrial Filtration intangible assets recognized at fair value in purchase accounting as well as $0.2 million of interest expense associated with borrowings under the Company’s Amended Credit Facility.
	Pro forma earnings during the six months ended June 30, 2014 were adjusted to exclude non-recurring items such as acquisition-related costs of $2.6 million and expense related to the fair value adjustment to inventory of $1.8 million, and to include additional amortization of the acquired Industrial Filtration intangible assets recognized at fair value in purchase accounting as well as additional interest expense associated with borrowings under the Company’s Amended Credit Facility. No amount is included in the pro forma earnings during the six months ended June 30, 2014 related to inventory fair value adjustments which would have been recognized in cost of sales as the corresponding inventory would have been completely sold during 2013.
	Pro forma earnings during the six months ended June 30, 2013 were adjusted to include acquisition-related costs of $2.6 million and expense of $2.3 million related to the amortization of the fair value adjustments to inventory and additional amortization of the acquired Industrial Filtration intangible assets recognized at fair value in purchase accounting as well as $0.4 million of interest expense associated with borrowings under the Company’s Amended Credit Facility

Inventories

Inventories	6 Months Ended
	Jun. 30, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories
	Inventories as of June 30, 2014 and December 31, 2013 were as follows:
	In thousands	June 30,			December 31,
		2014			2013
	Raw materials	$	21,680		$	11,944
	Work in process	15,558			14,546
	Finished goods	16,172			9,537
		53,410			36,027
	Less: Progress billings	(2,210		)	(1,110		)
	Total inventories	$	51,200		$	34,917
	Included in work in process is gross tooling inventory of $8.2 million and $9.9 million at June 30, 2014 and December 31, 2013, respectively. Tooling inventory, net of progress billings, was $6.0 million and $8.8 million at June 30, 2014 and December 31, 2013, respectively.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2014
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, 2014 were as follows:
		December 31,		Currency			Additions		30-Jun-14
	In thousands	2013		translation adjustments
	Performance Materials	$	13,929	$	(19	)	$	—	$	13,910
	Industrial Filtration	—		—			3,693		3,693
	Other Products and Services	4,660		—			—		4,660
	Total goodwill	$	18,589	$	(19	)	$	3,693	$	22,263
	The goodwill associated with the Industrial Filtration segment results from the acquisition of the Industrial Filtration business on February 20, 2014. The amount allocated to goodwill is reflective of the benefits the Company expects to realize from the entrance into new global markets and Industrial Filtration's assembled workforce. None of the recognized goodwill is expected to be deductible for income tax purposes.
	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, 2014 and December 31, 2013:
		June 30, 2014					December 31, 2013
	In thousands	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
	Amortized intangible assets
	License agreements	$	879	$	(879	)	$	881	$	(881	)
	Technology	2,500		(60		)	—		—
	Customer Relationships	2,553		(85		)	—		—
	Patents	6,747		(3,470		)	6,766		(3,307		)
	Other	830		(254		)	278		(227		)
	Total amortized intangible assets	$	13,509	$	(4,748	)	$	7,925	$	(4,415	)
	In connection with the acquisition of Industrial Filtration in February 2014, the Company recorded intangible assets of $5.6 million, which included $2.5 million of customer relationships, $2.5 million of purchased technology, $0.3 million of net favorable operating leases, and $0.2 million of trade names. The weighted average useful lives of the acquired assets were 11 years, 15 years, 7 years and 5 years, respectively.

Longterm_Debt_and_Financing_Ar

Long-term Debt and Financing Arrangements	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Long-term Debt and Financing Arrangements	'
	Long-term Debt and Financing Arrangements
	On February 18, 2014, the Company amended and restated its $35.0 million senior secured domestic revolving credit facility (“Amended Credit Facility”) with a financial institution and two additional lenders, increasing the available borrowing from $35 million to $100 million. The Amended Credit Facility is secured by substantially all of the assets of the Company. The maturity date for the Amended Credit Facility is January 31, 2019, at which time amounts outstanding under the Amended Credit Facility are due and payable. The Company entered into this Amended Credit Facility in part to fund a majority of the purchase price of the Industrial Filtration business.
	Under the terms of the Amended Credit Facility, the lenders are providing a $100 million revolving credit facility to the Company, under which the lenders may make revolving loans and issue letters of credit to or for the benefit of the Company and its subsidiaries. The Amended Credit Facility may be increased by an aggregate amount not to exceed $50 million through an accordion feature, subject to specified conditions.
	The Amended Credit Facility contains a number of affirmative and negative covenants, including financial and operational covenants. The Company is required to meet a minimum interest coverage ratio. The interest coverage ratio requires that, at the end of each fiscal quarter, the ratio of consolidated EBIT to Consolidated Interest Charges, both as defined in the Amended Credit Facility, may not be less than 2.0 to 1.0 for the immediately preceding 12 month period. In addition, the Company must maintain a Consolidated Leverage Ratio, as defined in the Amended Credit Facility, as of the end of each fiscal quarter of no greater than 3.0 to 1.0. The Company must also meet minimum consolidated EBITDA as of the end of each fiscal quarter for the preceding 12 month period of $30.0 million. The Company was in compliance with all covenants at June 30, 2014.
	Interest is charged on borrowings at the Company’s option of either: (i) Base Rate plus the Applicable Rate, or (ii) the Eurodollar Rate plus the Applicable Rate. The Base Rate is a fluctuating rate equal to the highest of (a) the federal funds rate plus 0.50%, (b) the prime rate as set by Bank of America, and (c) the Eurocurrency Rate plus 1.00%. The Eurocurrency Rate means (i) if denominated in LIBOR quoted currency, a fluctuating LIBOR per annum rate equal to the London Interbank Offered Rate; (ii) if denominated in Canadian Dollars, the rate per annum equal to the Canadian Dealer Offered Rate; or (iii) the rate per annum as designated with respect to such alternative currency at the time such alternative currency is approved by the Lenders. The Applicable Rate is determined based on the Company’s Consolidated Leverage Ratio (as defined in the Amended Credit Agreement). The Applicable Rate added to the Base Rate Committed Loans ranges from 15 basis points to 100 basis points, and the Applicable Rate added to Eurocurrency Rate Committed Loans and Letters of Credit ranges from 75 basis points to 175 basis points. The Company pays a quarterly fee ranging from 20 basis points to 30 basis points on the unused portion of the $100 million available under the Amended Credit Agreement. At June 30, 2014, the Company had borrowing availability of $37.2 million under the Amended Credit Facility net of standby letters of credit outstanding of $2.8 million.
	The Company’s previous $35 million senior secured domestic revolving credit facility (“Domestic Credit Facility”) that was outstanding at December 31, 2013, was entered into on June 16, 2011. The Domestic Credit Facility was secured by substantially all of the assets of the Company. The maturity date for the Domestic Credit Facility was June 15, 2016. The Company had no borrowings under the Domestic Credit Facility during 2013 and no outstanding borrowings at December 31, 2013. The Company was in compliance with all covenants at December 31, 2013.
	At June 30, 2014, the Company’s foreign subsidiaries’ various credit arrangements with banks totaled €9.0 million (approximately $12.3 million) all of which was available for borrowings, primarily restricted to borrowings by the respective foreign subsidiary. The Company’s foreign subsidiaries had no borrowings outstanding under any of their respective credit arrangements at June 30, 2014 and December 31, 2013.
	The Company has a capital lease agreement for the land and building at the St. Nazaire, France operating facility, included in the Thermal/Acoustical Metals segment, requiring monthly principal and interest payments through 2016. The capital lease provides an option for the Company to purchase the land and building at the end of the lease for a nominal amount.
	Total outstanding debt consists of:
					June 30,			December 31,
	In thousands	Effective Rate		Maturity	2014			2013
	Revolver Loan, due January 31, 2019	1.4	%	2019	$	60,000		$	—
	Capital Lease, land and building, St. Nazaire, France	5.44	%	2016	1,329			1,647
	Capital Lease, manufacturing equipment, Hamptonville, North Carolina	5	%	2017	52			67
					61,381			1,714
	Less portion due within one year				(678		)	(663		)
	Total long-term debt				$	60,703		$	1,051
	The carrying value of the Company’s Amended Credit Facility approximates fair value given the variable rate nature of the debt. As such this debt would be classified as a Level 2 liability within the fair value hierarchy.
	The weighted average interest rate on long-term debt was 1.6% for the six months ended June 30, 2014 and 5.4% for the year ended December 31, 2013.

Equity_Compensation_Plans

Equity Compensation Plans	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Equity Compensation Plans	'
	Equity Compensation Plans
	As of June 30, 2014, 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 incurred compensation expense of $0.7 million and $0.2 million for the quarters ended June 30, 2014 and June 30, 2013, respectively, and $1.3 million and $0.7 million for the six months ended June 30, 2014 and June 30, 2013, respectively, for the Plans, including restricted stock awards. No 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, 2014:
	In thousands except per share	Shares	Weighted-		Weighted-	Aggregate
	amounts and years		Average		Average	Intrinsic Value
			Exercise Price		Remaining
					Contractual
					Term
					(years)
	Outstanding at June 30, 2014	665	$	10.49	6.1	$	11,229
	Exercisable at June 30, 2014	408	$	9.06	4.7	$	7,468
	Expected to vest at June 30, 2014	245	$	12.75	8.3	$	3,582
	There were no stock options granted and 45,929 stock options exercised during the quarter ended June 30, 2014 and no stock options granted and 91,217 stock options exercised during the six months ended June 30, 2014. The amount of cash received from the exercise of stock options was $0.4 million during the quarter ended June 30, 2014 and $0.8 million during the six months ended June 30, 2014. The intrinsic value of stock options exercised was $0.8 million with a tax benefit of $0.3 million during the quarter ended June 30, 2014 and the intrinsic value of stock options exercised was $1.3 million with a tax benefit of $0.5 million during the six months ended June 30, 2014. There were 12,500 stock options granted and 27,337 stock options exercised during the quarter ended June 30, 2013 and 12,500 stock options granted and 97,986 exercised during the six months ended June 30, 2013. The amount of cash received from the exercise of stock options was $0.3 million during the quarter ended June 30, 2013 and $0.9 million during the six months ended June 30, 2013. The intrinsic value of stock options exercised was $0.1 million with a minimal tax-benefit during the quarter ended June 30, 2013 and the intrinsic value of stock options exercised was $0.6 million with a tax benefit of $0.2 million during the six months ended June 30, 2013. At June 30, 2014, the total unrecognized compensation cost related to non-vested stock option awards was approximately $1.2 million, with a weighted average expected amortization period of 2.5 years.
	Restricted Stock
	Restricted stock includes both performance-based and time-based awards. There were no time-based restricted shares granted during the quarter ended June 30, 2014 and 28,769 time-based restricted shares granted during the six months ended June 30, 2014. There were no performance-based restricted shares granted during the quarter ended June 30, 2014 and 138,000 performance-based restricted shares granted during the six months ended June 30, 2014, which have a 2016 earnings per share target. During the six months ended June 30, 2014, there were 64,200 performance-based shares that vested in accordance with Plan provisions. There were 3,000 time-based shares that vested during the six months ended June 30, 2014. There were 5,000 time-based restricted shares granted during the six months ended June 30, 2013. There were 92,290 performance-based restricted shares granted during the six months ended June 30, 2013, which have a 2015 earnings per share target. During the six months ended June 30, 2013, there were 61,800 performance-based shares that vested in accordance with Plan provisions. At June 30, 2014, there were 414,414 unvested restricted stock awards with total unrecognized compensation cost related to these awards of $3.8 million with a weighted average expected amortization period of 2.3 years. Compensation expense for performance based awards is recorded based on management’s assessment of the probability of achieving the performance goals and service period.

Stock_Repurchases

Stock Repurchases	6 Months Ended
	Jun. 30, 2014
Repurchases Of Common Stock [Abstract]	'
Stock Repurchases	'
	Stock Repurchases
	In April 2012, the Company’s Board of Directors approved a stock repurchase program (the “2012 Stock Repurchase Program”), which authorized the Company to repurchase up to 1.0 million shares of its common stock. The Company did not repurchase any stock during the three and six months ended June 30, 2014 under the 2012 Stock Repurchase Program. As of June 30, 2014, there were 267,089 shares remaining and authorized for repurchase under the 2012 Stock Repurchase Program.
	During the six months ended June 30, 2014, the Company purchased 23,718 shares of common stock valued at $0.5 million, through withholding, pursuant to provisions in agreements with recipients of restricted stock granted under the Company’s equity compensation plans, which allow the Company to withhold the number of shares having fair value equal to each recipient’s tax withholding due.

Employer_Sponsored_Benefit_Pla

Employer Sponsored Benefit Plans	6 Months Ended
	Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Employer Sponsored Benefit Plans	'
	Employer Sponsored Benefit Plans
	As of June 30, 2014, the Company maintains a defined benefit pension plan that covers certain domestic Lydall employees (“domestic pension plan”) that is closed to new employees and benefits are no longer accruing. The domestic pension plan is noncontributory and benefits are based on either years of service or eligible compensation paid while a participant is in the plan. The Company’s funding policy is to fund not less than the ERISA minimum funding standard and not more than the maximum amount that can be deducted for federal income tax purposes.
	On April 1, 2014, the Company offered a voluntary lump sum payment option to certain former U.S. employees who are vested defined benefit plan participants not currently receiving monthly payments. The voluntary lump sum payments were made in July 2014 and paid from pension plan assets and will be accounted for during the third quarter of 2014. During the third quarter of 2014, the Company expects to incur a non-cash settlement charge of $4.9 million (see subsequent event footnote).
	The Company expects to contribute approximately $4.2 million in cash to its domestic pension plan in 2014. Contributions of $0.4 million were made during the second quarter of 2014 and $3.4 million were made for the six months ended June 30, 2014. Contributions of $0.5 million were made during the second quarter of 2013 and $0.6 million were made during the six months ended June 30, 2013.
	The following is a summary of the components of net periodic benefit cost, which is recorded primarily within selling, product development and administrative expenses, for the domestic pension plan for the quarters ended June 30, 2014 and 2013:
		Quarter Ended						Six Months Ended
		June 30,						June 30,
	In thousands	2014			2013			2014			2013
	Components of net periodic benefit cost
	Interest cost	$	665		$	614		$	1,331		$	1,227
	Expected return on assets	(793		)	(673		)	(1,587		)	(1,346		)
	Amortization of actuarial loss	180			267			360			534
	Net periodic benefit cost	$	52		$	208		$	104		$	415

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The Company’s effective tax rate was 31.3% and 36.8% for the quarters ended June 30, 2014 and 2013, respectively, and 38.2% and 34.0% for the six months ended June 30, 2014 and 2013, respectively. The difference in the Company’s effective tax rate for the quarter ended June 30, 2014 compared to the second quarter of 2013 was primarily due to the expectation of increased earnings in 2014 compared to 2013 derived from countries with lower tax rates compared to that of the United States. The Company's effective tax rate for the six months ended June 30, 2014 was negatively impacted by discrete income tax charges of approximately $1.0 million, recorded in the first quarter of 2014, primarily for non-deductible transaction related expenses associated with the acquisition of the Industrial Filtration business. The Company’s effective tax rate for the six months ended June 30, 2013 included a discrete tax benefit of $0.5 million recorded in the first quarter of 2013 as the Company concluded certain U.S. federal income tax matters through the year ended December 31, 2009.
	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 and the Netherlands. With few exceptions, the Company is no longer subject to U.S. federal examinations for years before 2010, state and local examinations for years before 2002, and non-U.S. income tax examinations for years before 2003.
	The Company’s effective tax rates in future periods could be affected by earnings being lower or higher than anticipated in countries where tax rates differ from the United States federal rate, the relative impact of permanent tax adjustments on higher or lower earnings from domestic operations, changes in net deferred tax asset valuation allowances, the impact of the completion of acquisitions or divestitures, changes in tax rates or tax laws and the completion of tax audits.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	For the quarters and six months ended June 30, 2014 and 2013, basic earnings per share were computed by dividing net income by the weighted average number of shares of common stock outstanding during the period. Unexercised stock options and unvested restricted shares are excluded from this calculation but are included in the diluted earnings per share calculation using the treasury stock method as long as their effect is not antidilutive.
	The following table provides a reconciliation of weighted-average shares used to determine basic and diluted earnings per share.
		Quarter Ended		Six Months Ended
		June 30,		June 30,
	In thousands	2014	2013	2014	2013
	Basic average common shares outstanding	16,618	16,612	16,580	16,674
	Effect of dilutive options and restricted stock awards	362	219	345	253
	Diluted average common shares outstanding	16,980	16,831	16,925	16,927
	For the quarter ended June 30, 2014, there were minimal stock options that were not considered in computing diluted earnings per common share because they were antidilutive. For the quarter ended June 30, 2013, stock options for 0.2 million shares of common stock were not considered in computing diluted earnings per common share because they were antidilutive.
	For the six months ended June 30, 2014 and 2013, stock options for 0.1 million and 0.2 million shares of common stock, respectively, were not considered in computing diluted earnings per common share because they were antidilutive.

Segment_Information

Segment Information	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	On February 20, 2014, the Company acquired the Industrial Filtration business from Andrew Industries Limited, which is being reported as a separate reportable segment since the acquisition date. Segment information is consistent with how management reviews the businesses, makes investing and resource allocation decisions and assesses operating performance.
	The Company’s reportable segments are Performance Materials, Industrial Filtration, Thermal/Acoustical Metals, and Thermal/Acoustical Fibers. Other Products and Services (“OPS”) includes Life Sciences Vital Fluids.
	Performance Materials Segment
	The Performance Materials segment includes filtration media solutions for air, fluid power, and industrial applications (“Filtration”), air and liquid life science applications (“Life Sciences Filtration”), and thermal insulation solutions for building products, appliances, and energy and industrial markets (“Thermal Insulation”). 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 components of clean-air systems for applications in clean-space, commercial, industrial and residential HVAC, power generation, and industrial processes. Lydall has leveraged its extensive technical expertise and applications knowledge into a suite of media products covering the vast liquid filtration landscape across the engine and industrial fields. The LyPore® Liquid Filtration Media series addresses a variety of application needs in fluid power, including hydraulic filters, air-water and air-oil coalescing, industrial fluid processes, diesel filtration and fuel filtration.
	Industrial Filtration Segment
	The Industrial Filtration segment includes non-woven felt filtration media and filter bags used primarily in industrial air and liquid filtration applications. Non-woven filter media is the most commonly used filter technology to satisfy increasing emission control regulations in a wide range of industries, including power, cement, steel, asphalt, incineration, mining, food, and pharmaceutical.
	Industrial Filtration 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 traditional scrim supported filtration felts. Industrial Filtration also offers extensive finishing and coating capabilities which provide custom engineered properties tailored to meet the most demanding filtration applications. The business leverages a wide range of fiber types and extensive technical capabilities to provide filtration products that meet our customers’ needs across a variety of applications providing both high filtration performance and durability.
	Thermal/Acoustical Metals Segment
	The Thermal/Acoustical Metals segment offers a range of innovative engineered products to assist in noise and heat abatement within the transportation sector. Lydall products are found in the underbody (tunnel, fuel tank, exhaust, rear muffler, and spare tire) and under hood (engine compartment, turbo charger, and manifolds) of cars, vans, trucks, SUVs, heavy duty trucks and recreational vehicles.
	Thermal/Acoustical Metals segment products are stamped metal combinations which provide thermal and acoustical shielding solutions for the global automotive and truck markets. Thermal/Acoustical Metals products include AMS® shield which is an all metal shield designed to be used in various vehicle applications, and Direct Exhaust Mount Heat shields which are mounted to high temperature surfaces like exhaust down-pipes or engine manifolds using aluminized and stainless steel with high performance heat absorbing metals. The patented CLD (constraint layer damped) material used in our heat shields is a lightweight material with characteristics to reduce vibration and parasitic noise on powertrain mounted heat shields.
	Thermal/Acoustical Fibers Segment
	The Thermal/Acoustical Fibers segment offers a line of innovative engineered products to assist in noise and heat abatement within the transportation sector. Lydall products are found in the interior (dash insulators), underbody (wheel well, fuel tank, and exhaust) and under hood (engine compartment) of cars, vans, trucks, SUVs, heavy duty trucks and recreational vehicles.
	Thermal/Acoustical Fibers segment products offer thermal and acoustical insulating solutions comprised of organic and inorganic fiber composites for the automotive and truck markets primarily in North America. Lydall’s dBCore® composite is a lightweight acoustical composite that emphasizes absorption principles over heavy-mass type systems. Lydall’s dBLyte® barrier 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® barrier is an innovative thermal solution that utilizes an adhesive backing for attachment and is ideal for protecting floor sheet metal from excessive exhaust heat. Lydall’s specially engineered wheel wells provide a solution with weight reduction and superior noise suppression capabilities over conventional designs.
	Thermal/Acoustical Metals segment and Thermal/Acoustical Fibers segment operating results include allocations of certain costs shared between the segments.
	Other Products and Services
	The Life Sciences Vital Fluids business offers specialty products for blood filtration devices, blood transfusion single-use containers and the design and manufacture of single-use solutions for cell growth, frozen storage and fluid handling, as well as equipment for bioprocessing applications.
	The tables below present net sales and operating income by segment for the quarters ended June 30, 2014 and 2013, 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: (1)
				Quarter Ended							Six Months Ended
				June 30,							June 30,
	In thousands			2014				2013			2014				2013
	Performance Materials Segment:
	Filtration			$	19,546			$	17,903		$	37,419			$	34,553
	Thermal Insulation			7,993				8,579			16,521				16,735
	Life Sciences Filtration			3,713				2,486			6,165				5,163
	Performance Materials Segment net sales			31,252				28,968			60,105				56,451
	Industrial Filtration Segment:
	Industrial Filtration			34,135				—			51,791				—
	Industrial Filtration net sales			34,135				—			51,791				—
	Thermal/Acoustical Metals Segment:
	Metal parts			38,701				35,957			75,726				69,066
	Tooling			4,638				4,963			10,069				12,056
	Thermal/Acoustical Metals Segment net sales			43,339				40,920			85,795				81,122
	Thermal/Acoustical Fibers Segment:
	Fiber parts			34,662				26,458			64,984				54,242
	Tooling			1,646				1,501			3,837				1,644
	Thermal/Acoustical Fibers Segment net sales			36,308				27,959			68,821				55,886
	Other Products and Services:
	Life Sciences Vital Fluids			4,864				4,263			9,588				8,570
	Other Products and Services net sales			4,864				4,263			9,588				8,570
	Eliminations and Other			(1,105		)		(1,059		)	(2,081		)		(1,949		)
	Consolidated Net Sales			$	148,793			$	101,051		$	274,019			$	200,080
	Operating income by segment: (1)
			Quarter Ended							Six Months Ended
			June 30,							June 30,
	In thousands		2014				2013			2014				2013
	Performance Materials		$	3,566			$	3,271		$	5,429			$	4,548
	Industrial Filtration		2,198				—			2,984				—
	Thermal/Acoustical Metals		2,564				4,431			6,217				7,449
	Thermal/Acoustical Fibers		9,279				5,432			16,620				11,586
	Other Products and Services		286				125			706				481
	Corporate Office Expenses		(5,320		)		(3,738		)	(11,757		)		(8,026		)
	Consolidated Operating Income		$	12,573			$	9,521		$	20,199			$	16,038
	-1	Industrial Filtration segment reports results for the period following the date of acquisition of February 20, 2014 through June 30, 2014.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	The Company is subject to legal proceedings, claims, investigations and inquiries that arise in the ordinary course of business such as, but not limited to, actions with respect to commercial, intellectual property, employment, personal injury and environmental matters. While the outcome of any matter is inherently uncertain and the Company cannot be sure that it will prevail in any of the cases, subject to the matter referenced below, the Company is not aware of any matters pending that are expected to be material with respect to the Company’s business, financial position, results of operations or cash flows.
	Lydall Gerhardi GmbH & Co. KG ("Lydall Gerhardi"), which is an indirect wholly-owned subsidiary of the Company and part of the Thermal/Acoustical Metals segment, is cooperating with the German Federal Cartel Office (Bundeskartellamt) in connection with an investigation, initiated in the second quarter of 2014, relating to possible violations of German anti-trust laws by and among certain European automotive heat shield manufacturers, including Lydall Gerhardi.
	The Company is conducting an internal investigation utilizing outside counsel. In the course of this internal investigation, the Company has discovered instances of inappropriate conduct by certain German employees of Lydall Gerhardi. The Company has disclosed its findings in an application for leniency submitted to the German Federal Cartel Office on July 22, 2014. The Company is continuing its internal investigation and has taken, and will continue to take, remedial actions.
	The German Federal Cartel Office has wide discretion in fixing the amount of a fine, up to a maximum fine of ten percent (10%) of the Company’s annual revenue of the year preceding the year in which the fine is imposed. The Company believes a loss is probable. However, in light of the uncertainties and variables involved, the Company is unable to estimate either the timing or the amount of the loss associated with this matter. There can be no assurance that this matter will not have a material adverse effect on the Company.

Changes_in_Accumulated_Other_C

Changes in Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Changes in Accumulated Other Comprehensive Income (Loss)	'
	Changes in Accumulated Other Comprehensive Income (Loss)
	The following table discloses the changes by classification within accumulated other comprehensive income (loss) for the periods ended June 30, 2014 and 2013:
	In thousands		Foreign Currency			Defined Benefit			Total
			Translation			Pension			Accumulated
			Adjustment			Adjustment			Other
									Comprehensive
									(Loss) Income
	Balance at December 31, 2012		$	3,178		$	(21,544	)	$	(18,366	)
	Other Comprehensive loss		(998		)	—			(998		)
	Amounts reclassified from accumulated other comprehensive income (a)		—			331			331
	Balance at June 30, 2013		2,180			(21,213		)	(19,033		)
	Balance at December 31, 2013		6,128			(14,972		)	(8,844		)
	Other Comprehensive loss		(3		)	—			(3		)
	Amounts reclassified from accumulated other comprehensive income (a)		—			223			223
	Balance at June 30, 2014		$	6,125		$	(14,749	)	$	(8,624	)
	(a)	Amount represents amortization of actuarial losses, a component of net periodic benefit cost. This amount was $0.1 million net of $0.1 million tax benefit and $0.2 million net of a $0.1 million tax benefit for the quarters ended June 30, 2014 and 2013, respectively. This amount was $0.2 million net of $0.1 million tax benefit and $0.3 million net of a $0.2 million tax benefit for the six months ended ended June 30, 2014 and 2013, respectively. See Note 8, Employer Sponsored Benefit Plans.

Subsequent_Event_Subsequent_Ev

Subsequent Event Subsequent Event	6 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Event	'
	Subsequent Event
	On April 1, 2014, the Company offered a voluntary one-time lump sum payment option to certain former U.S. employees who were vested defined benefit plan participants and not currently receiving monthly payments from the Company's domestic defined benefit pension plan ("domestic pension plan"). The election period for this voluntary offer ended in the second quarter of 2014. Approximately 62% of eligible participants elected to receive a lump sum payout resulting in $10.3 million being paid out of domestic pension plan assets in July 2014. This payout required a re-measurement of the domestic pension plan and a partial plan settlement which will result in a non-cash pre-tax loss of $4.9 million in net periodic pension benefit expense in the third quarter of 2014, with an offset to accumulated other comprehensive loss in shareholder’s equity, net of tax. The non-cash charge is required to accelerate the recognition of a portion of the previously unrecognized actuarial losses in the domestic pension plan.

Acquisition_Tables

Acquisition (Tables)	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The following table summarizes the fair values of identifiable assets acquired and liabilities assumed at the date of the acquisition:
	In thousands
	Cash	$	7,493
	Accounts Receivable	26,779
	Inventory	25,046
	Other current assets	2,894
	Property, plant and equipment	38,780
	Deferred Taxes	2,501
	Intangible assets (Note 4)	5,596
	Goodwill (Note 4)	3,693
	Total assets acquired	112,782
	Other liabilities	(18,002		)
	Deferred taxes	(8,130		)
	Total liabilities assumed	(26,132		)
	Net assets acquired	$	86,650
Business Acquisition, Pro Forma Information	'
	The pro forma information does not include the effects of any synergies related to the acquisition.
		(Unaudited Pro Forma)					(Unaudited Pro Forma)
		Quarter Ended June 30,					Six Months Ended June 30,
	In thousands	2014			2013		2014		2013
	Net Sales	$	148,793		$	134,139	$	291,535	$	263,855
	Net Income	$	8,679		$	7,523	$	16,155	$	10,124
	Earnings per share:
	Basic	$	0.52		$	0.45	$	0.97	$	0.61
	Diluted	$	0.51		$	0.45	$	0.95	$	0.6

Inventories_Tables

Inventories (Tables)	6 Months Ended
	Jun. 30, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories as of June 30, 2014 and December 31, 2013 were as follows:
	In thousands	June 30,			December 31,
		2014			2013
	Raw materials	$	21,680		$	11,944
	Work in process	15,558			14,546
	Finished goods	16,172			9,537
		53,410			36,027
	Less: Progress billings	(2,210		)	(1,110		)
	Total inventories	$	51,200		$	34,917

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Changes in Carrying Amount of Goodwill by Segment	'
	The changes in the carrying amount of goodwill by segment as of and for the six months ended June 30, 2014 were as follows:
		December 31,		Currency			Additions		30-Jun-14
	In thousands	2013		translation adjustments
	Performance Materials	$	13,929	$	(19	)	$	—	$	13,910
	Industrial Filtration	—		—			3,693		3,693
	Other Products and Services	4,660		—			—		4,660
	Total goodwill	$	18,589	$	(19	)	$	3,693	$	22,263
Amortization of the Company's Acquired Intangible Assets other than Goodwill	'
	The table below presents the gross carrying amount and, as applicable, the accumulated amortization of the Company’s acquired intangible assets other than goodwill included in “Other intangible assets, net” in the Condensed Consolidated Balance Sheets as of June 30, 2014 and December 31, 2013:
		June 30, 2014					December 31, 2013
	In thousands	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
	Amortized intangible assets
	License agreements	$	879	$	(879	)	$	881	$	(881	)
	Technology	2,500		(60		)	—		—
	Customer Relationships	2,553		(85		)	—		—
	Patents	6,747		(3,470		)	6,766		(3,307		)
	Other	830		(254		)	278		(227		)
	Total amortized intangible assets	$	13,509	$	(4,748	)	$	7,925	$	(4,415	)

Longterm_Debt_and_Financing_Ar1

Long-term Debt and Financing Arrangements (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Maturities of Long-term Debt	'
	Total outstanding debt consists of:
					June 30,			December 31,
	In thousands	Effective Rate		Maturity	2014			2013
	Revolver Loan, due January 31, 2019	1.4	%	2019	$	60,000		$	—
	Capital Lease, land and building, St. Nazaire, France	5.44	%	2016	1,329			1,647
	Capital Lease, manufacturing equipment, Hamptonville, North Carolina	5	%	2017	52			67
					61,381			1,714
	Less portion due within one year				(678		)	(663		)
	Total long-term debt				$	60,703		$	1,051

Equity_Compensation_Plans_Tabl

Equity Compensation Plans (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary Of Outstanding And Exercisable Options	'
	The following table is a summary of outstanding and exercisable options as of June 30, 2014:
	In thousands except per share	Shares	Weighted-		Weighted-	Aggregate
	amounts and years		Average		Average	Intrinsic Value
			Exercise Price		Remaining
					Contractual
					Term
					(years)
	Outstanding at June 30, 2014	665	$	10.49	6.1	$	11,229
	Exercisable at June 30, 2014	408	$	9.06	4.7	$	7,468
	Expected to vest at June 30, 2014	245	$	12.75	8.3	$	3,582

Employer_Sponsored_Benefit_Pla1

Employer Sponsored Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Summary Of The Components Of Net Periodic Benefit Cost For The Domestic Pension Plan	'
	The following is a summary of the components of net periodic benefit cost, which is recorded primarily within selling, product development and administrative expenses, for the domestic pension plan for the quarters ended June 30, 2014 and 2013:
		Quarter Ended						Six Months Ended
		June 30,						June 30,
	In thousands	2014			2013			2014			2013
	Components of net periodic benefit cost
	Interest cost	$	665		$	614		$	1,331		$	1,227
	Expected return on assets	(793		)	(673		)	(1,587		)	(1,346		)
	Amortization of actuarial loss	180			267			360			534
	Net periodic benefit cost	$	52		$	208		$	104		$	415

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Reconciliation of Weighted Average Shares Used to Determine Basic and Diluted Earnings Per Share	'
	The following table provides a reconciliation of weighted-average shares used to determine basic and diluted earnings per share.
		Quarter Ended		Six Months Ended
		June 30,		June 30,
	In thousands	2014	2013	2014	2013
	Basic average common shares outstanding	16,618	16,612	16,580	16,674
	Effect of dilutive options and restricted stock awards	362	219	345	253
	Diluted average common shares outstanding	16,980	16,831	16,925	16,927

Segment_Information_Tables

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Consolidated Net Sales by Segment	'
	The tables below present net sales and operating income by segment for the quarters ended June 30, 2014 and 2013, 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: (1)
				Quarter Ended							Six Months Ended
				June 30,							June 30,
	In thousands			2014				2013			2014				2013
	Performance Materials Segment:
	Filtration			$	19,546			$	17,903		$	37,419			$	34,553
	Thermal Insulation			7,993				8,579			16,521				16,735
	Life Sciences Filtration			3,713				2,486			6,165				5,163
	Performance Materials Segment net sales			31,252				28,968			60,105				56,451
	Industrial Filtration Segment:
	Industrial Filtration			34,135				—			51,791				—
	Industrial Filtration net sales			34,135				—			51,791				—
	Thermal/Acoustical Metals Segment:
	Metal parts			38,701				35,957			75,726				69,066
	Tooling			4,638				4,963			10,069				12,056
	Thermal/Acoustical Metals Segment net sales			43,339				40,920			85,795				81,122
	Thermal/Acoustical Fibers Segment:
	Fiber parts			34,662				26,458			64,984				54,242
	Tooling			1,646				1,501			3,837				1,644
	Thermal/Acoustical Fibers Segment net sales			36,308				27,959			68,821				55,886
	Other Products and Services:
	Life Sciences Vital Fluids			4,864				4,263			9,588				8,570
	Other Products and Services net sales			4,864				4,263			9,588				8,570
	Eliminations and Other			(1,105		)		(1,059		)	(2,081		)		(1,949		)
	Consolidated Net Sales			$	148,793			$	101,051		$	274,019			$	200,080
Operating Income by Segment	'
	Operating income by segment: (1)
			Quarter Ended							Six Months Ended
			June 30,							June 30,
	In thousands		2014				2013			2014				2013
	Performance Materials		$	3,566			$	3,271		$	5,429			$	4,548
	Industrial Filtration		2,198				—			2,984				—
	Thermal/Acoustical Metals		2,564				4,431			6,217				7,449
	Thermal/Acoustical Fibers		9,279				5,432			16,620				11,586
	Other Products and Services		286				125			706				481
	Corporate Office Expenses		(5,320		)		(3,738		)	(11,757		)		(8,026		)
	Consolidated Operating Income		$	12,573			$	9,521		$	20,199			$	16,038
	-1	Industrial Filtration segment reports results for the period following the date of acquisition of February 20, 2014 through June 30, 2014.

Changes_in_Accumulated_Other_C1

Changes in Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Changes By Classification Within Accumulated Other Comprehensive Income (Loss)	'
	The following table discloses the changes by classification within accumulated other comprehensive income (loss) for the periods ended June 30, 2014 and 2013:
	In thousands		Foreign Currency			Defined Benefit			Total
			Translation			Pension			Accumulated
			Adjustment			Adjustment			Other
									Comprehensive
									(Loss) Income
	Balance at December 31, 2012		$	3,178		$	(21,544	)	$	(18,366	)
	Other Comprehensive loss		(998		)	—			(998		)
	Amounts reclassified from accumulated other comprehensive income (a)		—			331			331
	Balance at June 30, 2013		2,180			(21,213		)	(19,033		)
	Balance at December 31, 2013		6,128			(14,972		)	(8,844		)
	Other Comprehensive loss		(3		)	—			(3		)
	Amounts reclassified from accumulated other comprehensive income (a)		—			223			223
	Balance at June 30, 2014		$	6,125		$	(14,749	)	$	(8,624	)
	(a)	Amount represents amortization of actuarial losses, a component of net periodic benefit cost. This amount was $0.1 million net of $0.1 million tax benefit and $0.2 million net of a $0.1 million tax benefit for the quarters ended June 30, 2014 and 2013, respectively. This amount was $0.2 million net of $0.1 million tax benefit and $0.3 million net of a $0.2 million tax benefit for the six months ended ended June 30, 2014 and 2013, respectively. See Note 8, Employer Sponsored Benefit Plans.

Acquisition_Details

Acquisition (Details) (USD $)	Feb. 20, 2014
In Thousands, unless otherwise specified
Business Combinations [Abstract]	'
Cash	$7,493
Accounts Receivable	26,779
Inventory	25,046
Other current assets	2,894
Property, plant and equipment	38,780
Deferred Taxes	2,501
Intangible assets	5,596
Goodwill	3,693
Total assets acquired	112,782
Other liabilities	-18,002
Deferred taxes	-8,130
Total liabilities assumed	-26,132
Net assets acquired	$86,650

Acquisition_Details_1

Acquisition (Details 1) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Combinations [Abstract]	'	'	'	'
Net Sales	$148,793	$134,139	$291,535	$263,855
Net Income	$8,679	$7,523	$16,155	$10,124
Earnings per share:	'	'	'	'
Basic (usd per share)	$0.52	$0.45	$0.97	$0.61
Diluted (usd per share)	$0.51	$0.45	$0.95	$0.60

Acquisition_Additional_Informa

Acquisition - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended				6 Months Ended
	Feb. 20, 2014	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Feb. 20, 2014
Business Acquisition [Line Items]	'	'		'		'		'		'
Cash Acquired	'	'		'		'		'		$7,493,000
Business Combination Purchase Price Borrowings	'	'		'		'		'		60,000,000
Line of credit facility, maximum borrowing capacity	'	100,000,000		'		100,000,000		'		100,000,000
Net sales	'	148,793,000		101,051,000		274,019,000		200,080,000		'
Operating Income (Loss)	'	12,573,000	[1]	9,521,000	[1]	20,199,000	[1]	16,038,000	[1]	'
Cost of Goods Sold, Direct Materials	2,100,000	'		'		'		'		'
Acquisition-related Costs [Member]	'	'		'		'		'		'
Business Acquisition [Line Items]	'	'		'		'		'		'
Revenues	'	200,000		200,000		2,600,000		2,600,000		'
Amortization of Acquired Intangible Assets [Member]	'	'		'		'		'		'
Business Acquisition [Line Items]	'	'		'		'		'		'
Revenues	'	'		100,000		'		'		'
Interest Expense Associated with Borrowings Under the Company's Amended Credit Facility [Member]	'	'		'		'		'		'
Business Acquisition [Line Items]	'	'		'		'		'		'
Revenues	'	'		200,000		'		400,000		'
Fair Value Adjustment to Inventory [Member]	'	'		'		'		'		'
Business Acquisition [Line Items]	'	'		'		'		'		'
Revenues	'	500,000		'		1,800,000		2,300,000		'
Industrial Filtration [Member]	'	'		'		'		'		'
Business Acquisition [Line Items]	'	'		'		'		'		'
Net sales	'	34,100,000		'		51,800,000		'		'
Operating Income (Loss)	'	2,198,000	[1]	0	[1]	2,984,000	[1]	0	[1]	'
Cost of Goods Sold, Direct Materials	'	500,000		'		1,800,000		'		'
Andrew Industries Limited [Member]	'	'		'		'		'		'
Business Acquisition [Line Items]	'	'		'		'		'		'
Payments to Acquire Businesses, Gross	86,700,000	'		'		'		'		'
Andrew Industries Limited [Member]	'	'		'		'		'		'
Business Acquisition [Line Items]	'	'		'		'		'		'
Business Combination, Acquisition Related Costs	'	$200,000		'		$2,600,000		'		'
[1]	Industrial Filtration segment reports results for the period following the date of acquisition of February 20, 2014 through June 30, 2014.

Inventories_Detail

Inventories (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory, Net [Abstract]	'	'
Raw materials	$21,680	$11,944
Work in process	15,558	14,546
Finished goods	16,172	9,537
Inventory, Gross, Total	53,410	36,027
Less: Progress billings	-2,210	-1,110
Total inventories	$51,200	$34,917

Inventories_Additional_Informa

Inventories - Additional Information (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Gross Tooling Inventory	$8.20	$9.90
Tooling Inventory Net Of Progress Billings	$6	$8.80

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Goodwill [Roll Forward]	'
Beginning Balance	$18,589
Currency translation adjustments	-19
Additions	3,693
Ending Balance	22,263
Performance Materials [Member]	'
Goodwill [Roll Forward]	'
Beginning Balance	13,929
Currency translation adjustments	-19
Additions	0
Ending Balance	13,910
Industrial Filtration [Member]	'
Goodwill [Roll Forward]	'
Beginning Balance	0
Currency translation adjustments	0
Additions	3,693
Ending Balance	3,693
Other Products and Services [Member]	'
Goodwill [Roll Forward]	'
Beginning Balance	4,660
Currency translation adjustments	0
Additions	0
Ending Balance	$4,660

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets (Detail 1) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Amortized intangible assets	'	'
Finite-Lived Intangible Assets, Gross	$13,509	$7,925
Finite-Lived Intangible Assets, Accumulated Amortization	-4,748	-4,415
Licensing Agreements [Member]	'	'
Amortized intangible assets	'	'
Finite-Lived Intangible Assets, Gross	879	881
Finite-Lived Intangible Assets, Accumulated Amortization	-879	-881
Technology [Member]	'	'
Amortized intangible assets	'	'
Finite-Lived Intangible Assets, Gross	2,500	0
Finite-Lived Intangible Assets, Accumulated Amortization	-60	0
Customer Relationships [Member]	'	'
Amortized intangible assets	'	'
Finite-Lived Intangible Assets, Gross	2,553	0
Finite-Lived Intangible Assets, Accumulated Amortization	-85	0
Patents [Member]	'	'
Amortized intangible assets	'	'
Finite-Lived Intangible Assets, Gross	6,747	6,766
Finite-Lived Intangible Assets, Accumulated Amortization	-3,470	-3,307
Other Intangible Assets [Member]	'	'
Amortized intangible assets	'	'
Finite-Lived Intangible Assets, Gross	830	278
Finite-Lived Intangible Assets, Accumulated Amortization	($254)	($227)

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	1 Months Ended
In Millions, unless otherwise specified	Feb. 28, 2014
Goodwill [Line Items]	'
Finite-lived Intangible Assets Acquired	$5.60
Customer Relationships [Member]	'
Goodwill [Line Items]	'
Finite-lived Intangible Assets Acquired	2.5
Finite-Lived Intangible Asset, Useful Life	'7 years
Technology [Member]	'
Goodwill [Line Items]	'
Finite-lived Intangible Assets Acquired	2.5
Finite-Lived Intangible Asset, Useful Life	'15 years
Operating Leases [Member]	'
Goodwill [Line Items]	'
Finite-lived Intangible Assets Acquired	0.3
Licensing Agreements [Member]	'
Goodwill [Line Items]	'
Finite-Lived Intangible Asset, Useful Life	'11 years
Patents [Member]	'
Goodwill [Line Items]	'
Finite-Lived Intangible Asset, Useful Life	'5 years
Trade Secrets [Member]	'
Goodwill [Line Items]	'
Finite-lived Intangible Assets Acquired	$0.20

Longterm_Debt_and_Financing_Ar2

Long-term Debt and Financing Arrangements (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Long-term Debt, Gross	$61,381	$1,714
Less portion due within one year	-678	-663
Total long-term debt	60,703	1,051
Revolver Loan, due January 31, 2019 [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term Debt, Gross	60,000	0
Debt Instrument, Interest Rate, Effective Percentage	1.40%	'
Capital Lease, land and building, St. Nazaire, France [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term Debt, Gross	1,329	1,647
Debt Instrument, Interest Rate, Effective Percentage	5.44%	'
Capital Lease, manufacturing equipment, Hamptonville, North Carolina [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term Debt, Gross	$52	$67
Debt Instrument, Interest Rate, Effective Percentage	5.00%	'

Longterm_Debt_and_Financing_Ar3

Long-term Debt and Financing Arrangements - Additional Information (Detail)

0 Months Ended

3 Months Ended

6 Months Ended

6 Months Ended

Feb. 18, 2014

Jun. 30, 2014

Jun. 30, 2014

Feb. 20, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Feb. 18, 2014

Dec. 31, 2013

Feb. 18, 2014

Feb. 18, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

USD ($)

USD ($)

USD ($)

USD ($)

Foreign Line of Credit [Member]

Foreign Line of Credit [Member]

Domestic Credit Facility [Member]

Domestic Credit Facility [Member]

Minimum [Member]

Maximum [Member]

Federal Funds Effective Swap Rate [Member]

Eurocurrency Rate [Member]

Eurocurrency Rate [Member]

Eurocurrency Rate [Member]

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

Minimum [Member]

Maximum [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility, maximum borrowing capacity

'

$100,000,000

$100,000,000

$100,000,000

'

'

'

$35,000,000

$35,000,000

$35,000,000

$100,000,000

'

'

'

'

Line Of Credit Facility Maximum Borrowing Capacity Increased Value

100,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line Of Credit Facility Maximum Borrowing Capacity Possible Value Of Increase

50,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit Facility Fixed Charge Coverage Ratio

'

'

2

'

'

'

'

'

'

'

'

'

'

'

'

Required consolidated leverage ratio as of end of each fiscal quarter

'

3

3

'

'

'

'

'

'

'

'

'

'

'

'

Required Consolidated EBITDA

'

30,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Basis Spread on Variable Rate

'

'

'

'

'

'

'

'

'

'

'

0.50%

1.00%

0.75%

1.75%

Line of credit facility, remaining borrowing capacity

'

37,200,000

37,200,000

'

'

'

'

'

'

'

'

'

'

'

'

Standby letters of credit, outstanding

'

2,800,000

2,800,000

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Current Borrowing Capacity

'

'

'

'

'

$12,300,000

€ 9,000,000

'

'

'

'

'

'

'

'

Debt, Weighted Average Interest Rate

'

1.60%

1.60%

'

5.40%

'

'

'

'

'

'

'

'

'

'

Longterm_Debt_and_Financing_Ar4

Long-term Debt and Financing Arrangements Long-term Debt and Financing Arrangements (parenthetical) (Details) (USD $)	0 Months Ended	6 Months Ended
	Feb. 18, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
		Eurocurrency Rate [Member]	Minimum [Member]	Minimum [Member]	Minimum [Member]	Maximum [Member]	Maximum [Member]	Maximum [Member]	Amended Credit Facility [Member]
				Base Rate [Member]	Eurocurrency Rate [Member]		Base Rate [Member]	Eurocurrency Rate [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'
Line Of Credit Facility Maximum Borrowing Capacity Increased Value	$100,000,000	'	'	'	'	'	'	'	$100,000,000
Debt Instrument, Basis Spread on Variable Rate	'	1.00%	'	0.15%	0.75%	'	1.00%	1.75%	'
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	'	'	0.20%	'	'	0.30%	'	'	'

Equity_Compensation_Plans_Deta

Equity Compensation Plans (Detail) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Shares	'
Outstanding at June 30, 2014	665
Exercisable at June 30, 2014	408
Expected to Vest at June 30, 2014	245
Weighted-Average Exercise Price (usd per share)	'
Outstanding at June 30, 2014	$10.49
Exercisable at June 30, 2014	$9.06
Expected to Vest at June 30, 2014	$12.75
Weighted- Average Remaining Contractual Term (years)	'
Outstanding at June 30, 2014	'6 years 1 month 5 days
Exercisable at June 30, 2014	'4 years 8 months 18 days
Expected to Vest at June 30, 2014	'8 years 4 months
Aggregate Intrinsic Value	'
Outstanding at June 30, 2014	$11,229
Exercisable at June 30, 2014	7,468
Expected to Vest at June 30, 2014	$3,582

Equity_Compensation_Plans_Addi

Equity Compensation Plans - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock based compensation expense	$0.70	$0.20	$1.30	$0.70
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	12,500	0	12,500
Cash received from exercise of stock option	0.4	0.3	0.8	0.9
Number of options exercised, intrinsic value	0.8	0.1	1.3	0.6
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	0.3	'	0.5	0.2
Stock Option Plan 2012 [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share options and restricted shares authorized	1,750,000	'	1,750,000	'
Additional shares authorized under the plan	'	'	1,200,000	'
Time Based Restricted Stock [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Restricted shares granted	0	'	28,769	5,000
Performance Based Restricted Stock Awards [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Restricted shares granted	'	'	138,000	92,290
Restricted shares Vested	'	'	64,200	61,800
Time Based Restricted Stock Awards [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Restricted shares Vested	'	'	3,000	'
Restricted Stock [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Total unrecognized compensation cost	3.8	'	3.8	'
Weighted average expected amortization period	'	'	'2 years 6 months	'
Unvested restricted stock awards	414,414	'	414,414	'
Employee Stock Option [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock Options Exercised	45,929	27,337	91,217	97,986
Total unrecognized compensation cost	$1.20	'	$1.20	'
Weighted average expected amortization period	'	'	'2 years 3 months 12 days	'

Stock_Repurchases_Additional_I

Stock Repurchases - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014	Apr. 30, 2012
		Share Repurchase Program Two Thousand and Twelve [Member]	Share Repurchase Program Two Thousand and Twelve [Member]
Share Repurchases [Line Items]	'	'	'
Stock repurchase program, number of shares authorized to be repurchased	'	'	1,000,000
Shares remaining and authorized for repurchase	'	267,089	'
Stock Repurchased During Period, Shares	23,718	'	'
Stock Repurchased During Period, Value	$0.50	'	'

Employer_Sponsored_Benefit_Pla2

Employer Sponsored Benefit Plans (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Components of net periodic benefit cost	'	'	'	'
Interest cost	$665	$614	$1,331	$1,227
Expected return on assets	-793	-673	-1,587	-1,346
Amortization of actuarial loss	180	267	360	534
Net periodic benefit cost	$52	$208	$104	$415

Employer_Sponsored_Benefit_Pla3

Employer Sponsored Benefit Plans - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014
					Pension Plan, Defined Benefit [Member]
					Scenario, Forecast [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'	'	'	'
Non-cash pre-tax loss in net periodic pension benefit expense	'	'	'	'	$4.90
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	'	'	4.2	'	'
Contributions made for domestic pension plan	$0.40	$0.50	$3.40	$0.60	'

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Effective tax rate for income from continuing operations	31.30%	36.80%	38.20%	34.00%
Recognized Discrete Tax Benefits	$1	($0.50)	$1	($0.50)

Earnings_Per_Share_Detail

Earnings Per Share (Detail)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Basic average common shares outstanding	16,618	16,612	16,580	16,674
Effect of dilutive options and restricted stock awards	362	219	345	253
Diluted average common shares outstanding	16,980	16,831	16,925	16,927

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail)	3 Months Ended	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'
Shares excluded from computation of diluted earnings per share (in shares)	0.2	0.1	0.2

Segment_Information_Detail

Segment Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	$148,793	$101,051	$274,019	$200,080
Performance Materials [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	31,252	28,968	60,105	56,451
Performance Materials [Member] | Industrial Filtration [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	19,546	17,903	37,419	34,553
Performance Materials [Member] | Thermal Insulation [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	7,993	8,579	16,521	16,735
Performance Materials [Member] | Life Sciences Filtration [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	3,713	2,486	6,165	5,163
Industrial Filtration Segment [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	34,135	0	51,791	0
Industrial Filtration Segment [Member] | Industrial Filtration [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	34,135	0	51,791	0
Thermal/Acoustical Metals Segment [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	43,339	40,920	85,795	81,122
Thermal/Acoustical Metals Segment [Member] | Metal Parts [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	38,701	35,957	75,726	69,066
Thermal/Acoustical Metals Segment [Member] | Tooling [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	4,638	4,963	10,069	12,056
Thermal/Acoustical Fibers Segment [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	36,308	27,959	68,821	55,886
Thermal/Acoustical Fibers Segment [Member] | Tooling [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	1,646	1,501	3,837	1,644
Thermal/Acoustical Fibers Segment [Member] | Fiber Parts [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	34,662	26,458	64,984	54,242
Other Products and Services [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	4,864	4,263	9,588	8,570
Other Products and Services [Member] | Life Sciences Vital Fluids [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	4,864	4,263	9,588	8,570
Intersegment Eliminations [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Net sales	($1,105)	($1,059)	($2,081)	($1,949)

Segment_Information_Detail_1

Segment Information (Detail 1) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'		'		'		'
Consolidated Operating Income	$12,573	[1]	$9,521	[1]	$20,199	[1]	$16,038	[1]
Performance Materials [Member]	'		'		'		'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'		'		'		'
Consolidated Operating Income	3,566	[1]	3,271	[1]	5,429	[1]	4,548	[1]
Industrial Filtration [Member]	'		'		'		'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'		'		'		'
Consolidated Operating Income	2,198	[1]	0	[1]	2,984	[1]	0	[1]
Thermal/Acoustical Metals Segment [Member]	'		'		'		'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'		'		'		'
Consolidated Operating Income	2,564	[1]	4,431	[1]	6,217	[1]	7,449	[1]
Thermal/Acoustical Fibers Segment [Member]	'		'		'		'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'		'		'		'
Consolidated Operating Income	9,279	[1]	5,432	[1]	16,620	[1]	11,586	[1]
Other Products and Services [Member]	'		'		'		'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'		'		'		'
Consolidated Operating Income	286	[1]	125	[1]	706	[1]	481	[1]
Corporate Office Expenses [Member]	'		'		'		'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'		'		'		'
Consolidated Operating Income	($5,320)	[1]	($3,738)	[1]	($11,757)	[1]	($8,026)	[1]
[1]	Industrial Filtration segment reports results for the period following the date of acquisition of February 20, 2014 through June 30, 2014.

Recovered_Sheet1

Changes in accumulated other comprehensive income (loss) (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]	'		'
Beginning Balance	($8,844)		($18,366)
Other Comprehensive loss	-3		-998
Amounts reclassified from accumulated other comprehensive income	223	[1]	331	[1]
Ending Balance	-8,624		-19,033
Accumulated Translation Adjustment [Member]	'		'
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]	'		'
Beginning Balance	6,128		3,178
Other Comprehensive loss	-3		-998
Amounts reclassified from accumulated other comprehensive income	0		0
Ending Balance	6,125		2,180
Accumulated Defined Benefit Plans Adjustment [Member]	'		'
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]	'		'
Beginning Balance	-14,972		-21,544
Other Comprehensive loss	0		0
Amounts reclassified from accumulated other comprehensive income	223	[1]	331	[1]
Ending Balance	($14,749)		($21,213)
[1]	Amount represents amortization of actuarial losses, a component of net periodic benefit cost. This amount was $0.1 million net of $0.1 million tax benefit and $0.2 million net of a $0.1 million tax benefit for the quarters ended June 30, 2014 and 2013, respectively. This amount was $0.2 million net of $0.1 million tax benefit and $0.3 million net of a $0.2 million tax benefit for the six months ended ended June 30, 2014 and 2013, respectively. See Note 8, Employer Sponsored Benefit Plans.

Recovered_Sheet2

Changes in accumulated other comprehensive income (loss) - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'	'	'
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Net of Tax	$0.10	$0.20	$0.20	$0.30
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Tax	$0.10	($0.10)	($0.10)	($0.20)

Subsequent_Event_Subsequent_Ev1

Subsequent Event Subsequent Event (Details) (Pension Plan, Defined Benefit [Member], USD $)	3 Months Ended		1 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2014	Jul. 31, 2014
		Scenario, Forecast [Member]	Subsequent Event [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'	'
Percentage of eligible participants electing lump sum payment	62.00%	'	'
Pension lump sum payment	'	'	$10.30
Non-cash pre-tax loss in net periodic pension benefit expense	'	$4.90	'