Neenah (NP) 10-K 21 Feb 20 2019 FY Annual report Financial data

COVER PAGE

COVER PAGE - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 18, 2020	Jun. 30, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	001-32240
Entity Registrant Name	Neenah Inc
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-1308307
Entity Address, Address Line One	3460 Preston Ridge Road
Entity Address, City or Town	Alpharetta
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	30005
City Area Code	678
Local Phone Number	566-6500
Title of 12(b) Security	Common Stock — $0.01 Par Value
Trading Symbol	NP
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 955,454,000
Entity Common Stock, Shares Outstanding		16,848,000
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Certain information contained in the definitive proxy statement for the Company's Annual Meeting of Stockholders to be held on May 21, 2020 is incorporated by reference into Part III hereof.
Entity Central Index Key	0001296435
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 938.5	$ 1,034.9	$ 979.9
Cost of products sold	755.1	851.5	779.7
Gross profit	183.4	183.4	200.2
Selling, general and administrative expenses	98.6	95.9	95.3
Restructuring, integration and other costs	6.2	2.1	1.3
Pension and SERP-related adjustments (Note 8)	(1.4)	1.8	0.6
Impairment loss (Note 13)	0	31.1	0
Acquisition-related adjustments (Note 4)	0	(3.9)	0
Insurance settlement	0	(0.4)	(3.2)
Other expense, net	1.7	2.7	1.9
Operating income	78.3	54.1	104.3
Interest expense	11.8	13	12.7
Interest income	0	0	(0.1)
Income from continuing operations before income taxes	66.5	41.1	91.7
Provision for income taxes	11.1	3.9	11.4
Income from continuing operations	55.4	37.2	80.3
Loss from discontinued operations, net of taxes (Note 2)	0	(0.8)	0
Net income	$ 55.4	$ 36.4	$ 80.3
Basic
Continuing operations (in dollars per share)	$ 3.27	$ 2.20	$ 4.74
Discontinued operations (in dollars per share)	0	(0.05)	0
Basic (in dollars per share)	3.27	2.15	4.74
Diluted
Continuing operations (in dollars per share)	3.26	2.17	4.68
Discontinued operations (in dollars per share)	0	(0.05)	0
Diluted (in dollars per share)	$ 3.26	$ 2.12	$ 4.68
Weighted Average Common Shares Outstanding (in thousands)
Basic (in shares)	16,848	16,850	16,805
Diluted (in shares)	16,906	16,968	17,052

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 55.4	$ 36.4	$ 80.3
Reclassification of amounts recognized in the consolidated statement of operations:
Amortization of adjustments to pension and other postretirement benefit liabilities	6	6	5.9
Pension plan settlement/curtailment losses	1.3	0.8	0.6
Amounts recognized in the consolidated statement of operations	7.3	6.8	6.5
Unrealized foreign currency translation (loss) gain	(3.5)	(7.9)	20
Net loss from pension and other postretirement benefit plans	(13.7)	(11.2)	(20.3)
Deferred loss on available-for-sale securities	0	0	(0.4)
(Loss) income from other comprehensive income items before income taxes	(9.9)	(12.3)	5.8
Benefit for income taxes	(1.7)	(1)	(3)
Other comprehensive (loss) income	(8.2)	(11.3)	8.8
Comprehensive income	$ 47.2	$ 25.1	$ 89.1

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Current Assets
Cash and cash equivalents	$ 9	$ 9.9
Accounts receivable, net	102.6	114.8
Inventories	122.8	131.6
Prepaid and other current assets	18.3	21.6
Total Current Assets	252.7	277.9
Property, Plant and Equipment, net	380.6	396.2
Lease Right-of-Use Assets	13.9
Deferred Income Taxes	13.4	16.4
Goodwill (Note 5)	83.1	84
Intangible Assets, net (Note 5)	66.7	70.7
Other Assets	17.4	16
TOTAL ASSETS	827.8	861.2
Current Liabilities
Debt payable within one year	2.6	2.3
Lease liabilities payable within one year	1.9
Accounts payable	48.9	63.3
Accrued expenses	47	55.2
Total Current Liabilities	100.4	120.8
Long-Term Debt	198.2	236.8
Noncurrent Lease Liabilities	13
Noncurrent Employee Benefits	93.1	92.9
Deferred Income Taxes	12.9	14.4
Other Noncurrent Obligations	3.9	6.1
TOTAL LIABILITIES	421.5	471
Commitments and Contingencies (Note 12)
Stockholders' Equity
Common stock, par value $0.01, authorized: 100,000,000 shares; issued and outstanding: 16,843,000 shares and 16,859,000 shares	0.2	0.2
Treasury stock, at cost: 1,835,000 shares and 1,738,000 shares	(82.8)	(76.6)
Additional paid-in capital	334.1	328.5
Retained earnings	268.1	243.2
Accumulated other comprehensive loss	(113.3)	(105.1)
Total Stockholders' Equity	406.3	390.2
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 827.8	$ 861.2

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Par value of shares of common stock (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares (in shares)	100,000,000	100,000,000
Common stock, issued shares (in shares)	16,843,000	16,859,000
Common stock, outstanding shares (in shares)	16,843,000	16,859,000
Treasury stock, shares (in shares)	1,835,000	1,738,000

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2016		18,245
Beginning Balance at Dec. 31, 2016		$ 0.2	$ (56.5)	$ 317	$ 169.6	$ (92)
Increase (Decrease) in Stockholders' Equity
Net income	$ 80.3				80.3
Other comprehensive (loss)/income, after income tax benefit	8.8					8.8
Reclassification of the stranded tax effects related to the Tax Act (Note 10)					10.9	(10.9)
Dividends declared					(25.1)
Shares purchased (Note 10)			(6.8)
Stock options exercised (in shares)		140
Stock options exercised				0.4
Restricted stock vesting (in shares)		73
Restricted stock vesting (Note 10)			(2.5)
Stock-based compensation				6.4
Other/Currency				0.1
Ending balance (in shares) at Dec. 31, 2017		18,458
Ending Balance at Dec. 31, 2017		$ 0.2	(65.8)	323.9	235.7	(94.1)
Increase (Decrease) in Stockholders' Equity
Net income	36.4				36.4
Other comprehensive (loss)/income, after income tax benefit	(11.3)					(11.3)
Dividends declared					(27.8)
Shares purchased (Note 10)			(9.3)
Stock options exercised (in shares)		67
Stock options exercised				0.7
Restricted stock vesting (in shares)		72
Restricted stock vesting (Note 10)			(1.5)
Stock-based compensation				4
Other/Currency				(0.1)
Ending balance (in shares) at Dec. 31, 2018		18,597
Ending Balance at Dec. 31, 2018	390.2	$ 0.2	(76.6)	328.5	243.2	(105.1)
Increase (Decrease) in Stockholders' Equity
Net income	55.4				55.4
Other comprehensive (loss)/income, after income tax benefit	(8.2)					(8.2)
Dividends declared					(30.5)
Shares purchased (Note 10)			(4.9)
Stock options exercised (in shares)		17
Restricted stock vesting (in shares)		64
Restricted stock vesting (Note 10)			(1.3)
Stock-based compensation				5.6
Ending balance (in shares) at Dec. 31, 2019		18,678
Ending Balance at Dec. 31, 2019	$ 406.3	$ 0.2	$ (82.8)	$ 334.1	$ 268.1	$ (113.3)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
OPERATING ACTIVITIES
Net income	$ 55.4	$ 36.4	$ 80.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	38.9	36.1	33.3
Impairment loss (Note 13)	0	31.1	0
Stock-based compensation	5.6	4	6.4
Deferred income tax provision	3.4	(1.9)	(0.2)
Pension curtailment (gain)/settlement charge, net of plan payments (Note 8)	(1.4)	1.8	0.6
Loss on asset dispositions	0.1	0.3	0.2
Non-cash effects of changes in liabilities for uncertain income tax positions	(0.7)	0.1	(0.1)
Net cash used in changes in operating working capital, net of effect of acquisitions (Note 15)	(0.6)	(1)	(11.8)
Pension and other post-employment benefits	(3.7)	(12.3)	(8)
Other	0.6	(1.9)	(0.7)
NET CASH PROVIDED BY OPERATING ACTIVITIES	97.6	92.7	100
INVESTING ACTIVITIES
Capital expenditures	(21.4)	(38.1)	(42.7)
Business acquisition (Note 4)	0	0	(43.1)
Asset acquisition	0	0	(8)
Proceeds from sale of property, plant and equipment (Note 13)	0	5	0
Sales (purchases) of marketable securities	(0.4)		(0.6)
Sales (purchases) of marketable securities		0.1
Other	(1.5)	(1.3)	(0.6)
NET CASH USED IN INVESTING ACTIVITIES	(23.3)	(34.3)	(95)
FINANCING ACTIVITIES
Proceeds from issuance of long-term debt (Note 7)	163.5	272.8	323.7
Debt issuance costs (Note 7)	(0.4)	(1.8)	(0.3)
Repayments of long-term debt (Note 7)	(201.6)	(285.6)	(293.3)
Cash dividends paid	(30.5)	(27.8)	(25.1)
Shares purchased (Note 10)	(6.2)	(10.8)	(9.3)
Proceeds from exercise of stock options	0	0.6	0.4
Other	0	0	0.1
NET CASH USED IN FINANCING ACTIVITIES	(75.2)	(52.6)	(3.8)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	(0.4)	0.2
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(0.9)	5.4	1.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	9.9	4.5	3.1
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 9	$ 9.9	$ 4.5

Background and Basis of Present

Background and Basis of Presentation	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Background and Basis of Presentation	Background and Basis of Presentation Background Neenah, Inc. ("Neenah" or the "Company"), is a Delaware corporation incorporated in April 2004. The Company has two primary operations: its technical products business and its fine paper and packaging business. The technical products business is an international producer of fiber-formed, coated and/or saturated specialized media that delivers high performance benefits to customers. Included in this segment are filtration media, tape and abrasives backings products, digital image transfer, durable label, and other specialty substrate products. The fine paper and packaging business is a supplier of branded premium printing, packaging and other high-end specialty papers primarily in North America. The Company's premium writing, text and cover papers, and specialty papers are used in commercial printing and imaging applications for corporate identity packages, invitations, personal stationery and high-end advertising, as well as premium labels and luxury packaging. Basis of Presentation The consolidated financial statements include the financial statements of the Company and its wholly owned and majority owned subsidiaries. All inter-company balances and transactions have been eliminated in consolidation.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of net sales and expenses during the reporting periods. Actual results could differ from these estimates, and changes in these estimates are recorded when known. Significant management judgment is required in determining the accounting for, among other things, reserves for uncertain tax positions, pension and postretirement benefit obligations, retained insurable risks, reserves for sales discounts and allowances, purchase price allocations, useful lives for depreciation and amortization, asset retirement obligations ("AROs"), future cash flows associated with impairment testing for tangible and intangible long-lived assets, goodwill, income taxes, contingencies, inventory obsolescence and market reserves and the valuation of stock-based compensation. Revenue Recognition The Company recognizes sales revenue at a point in time following the transfer of control of the product to the customer, which typically occurs upon shipment or delivery depending on the terms of the underlying contractual arrangements. Sales are reported net of allowable discounts and estimated returns. Reserves for cash discounts, trade allowances and sales returns are estimated using historical experience. The Company accounts for shipping and handling activities related to contracts with customers as costs to fulfill our promise to transfer the associated products. Accordingly, the Company records customer payments of shipping and handling costs as a component of net sales and classifies such costs as a component of cost of sales. The Company excludes tax amounts assessed by governmental authorities that are both (i) imposed on and concurrent with a specific revenue-producing transaction and (ii) collected from customers from our measurement of transaction prices. Accordingly, such tax amounts are not included as a component of net sales or cost of sales. The Company considers each transaction/shipment as a separate performance obligation. Neenah recognizes revenue when the title transfers to the customer. As such, the remaining performance obligations at period end are not considered significant. Sales terms in the technical products business vary depending on the type of product sold and customer category. In general, sales are collected in approximately 45 to 55 days . Extended credit terms of up to 120 days are offered to customers located in certain international markets. Fine paper and packaging sales terms range between 20 and 30 days with discounts of 0 to 2 percent for early customer payments, with discounts of one percent and 20 -day terms used most often. Extended credit terms are offered to customers located in certain international markets. Refer to Note 14, "Business Segment and Geographic Information", for further disaggregation of revenue. Cash and Cash Equivalents Cash and cash equivalents include all cash balances and highly liquid investments with an initial maturity of three months or less. The Company places its temporary cash investments with high credit quality financial institutions. As of December 31, 2019 and 2018 , $0.1 million and $0.1 million , respectively, of the Company's cash and cash equivalents is restricted to the payment of postretirement benefits for certain former Fox River executives. Inventories U.S. inventories are valued at the lower of cost, using the last-in, first-out ("LIFO") method for financial reporting purposes, or market. European inventories are valued at the lower of cost, using a weighted-average cost method, or net realizable value. Cost includes labor, materials and production overhead. Foreign Currency Balance sheet accounts of the Company's operations in Germany and the Netherlands, the United Kingdom (the "U.K."), and Canada are translated from Euros, British Pounds, and Canadian dollars, respectively, into U.S. dollars at period-end exchange rates, and income and expense accounts are translated at average exchange rates during the period. Translation gains or losses related to net assets located in Germany, the Netherlands, the U.K., and Canada are recorded as unrealized foreign currency translation adjustments within accumulated other comprehensive income (loss) ("AOCI") in stockholders' equity. Gains and losses resulting from foreign currency transactions (transactions denominated in a currency other than the entity's functional currency) are included in Other expense, net in the consolidated statements of operations. Property and Depreciation Property, plant and equipment are stated at cost, less accumulated depreciation. Certain costs of software developed or obtained for internal use are capitalized. When property, plant and equipment is sold or retired, the costs and the related accumulated depreciation are removed from the accounts, and the gains or losses are recorded in Other (income) expense, net. For financial reporting purposes, depreciation is principally computed on the straight-line method over estimated useful asset lives. The weighted average remaining useful lives for buildings, land improvements and machinery and equipment are approximately 19 years , 19 years and 10 years , respectively. The units-of-production method of depreciation is used for the U.S. transportation filtration production assets with a gross book value of $69.3 million , which reflects the nature of the assets' utilization. For income tax purposes, accelerated methods of depreciation are used. The costs of major rebuilds and replacements of plant and equipment are capitalized, and the cost of maintenance performed on manufacturing facilities, composed of labor, materials and other incremental costs, is expensed as incurred. Start-up costs for new or expanded facilities, including costs related to trial production, are expensed as incurred. The Company accounts for AROs in accordance with Accounting Standards Codification ("ASC") Topic 410, Asset Retirements and Environmental Obligations , which requires companies to make estimates regarding future events in order to record a liability for AROs in the period in which a legal obligation is created. Such liabilities are recorded at fair value, with an offsetting increase to the carrying value of the related long-lived asset. As of December 31, 2019 , the Company is unable to estimate its AROs for environmental liabilities at its manufacturing facilities. Stock-Based Compensation The Company accounts for stock-based compensation in accordance with the fair value recognition provisions of ASC Topic 718, Compensation — Stock Compensation ("ASC Topic 718"). The amount of stock-based compensation cost recognized is based on the fair value of grants that are ultimately expected to vest and is recognized pro-rata over the requisite service period for the entire award. Research and Development Expense Research and development costs are charged to expense as incurred and are recorded in "Selling, general and administrative expenses" on the consolidated statement of operations. See Note 15, "Supplemental Data — Supplemental Statement of Operations Data." Fair Value Measurements The Company measures fair value in accordance with ASC Topic 820, Fair Value Measurements and Disclosures ("ASC Topic 820") which establishes a framework for measuring fair value. ASC Topic 820 provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Fair Value of Financial Instruments The carrying amounts reflected in the consolidated balance sheets for cash and cash equivalents, accounts receivable and accounts payable approximate fair value due to their short maturities. The fair value of short and long-term debt is estimated using rates currently available to the Company for debt of the same remaining maturities. The following table presents the carrying value and the fair value of the Company's debt. 12/31/2019 12/31/2018 Carrying Fair Carrying Fair 2021 Senior Notes (5.25% fixed rate) $ 175.0 $ 174.3 $ 175.0 $ 170.5 Global Revolving Credit Facilities (variable rates) 21.6 21.6 57.9 57.9 Second German Loan Agreement (2.5% fixed rate) 3.5 3.6 4.8 5.1 Third German Loan Agreement (1.45% fixed rate) 3.7 3.7 4.9 4.9 Total debt $ 203.8 $ 203.2 $ 242.6 $ 238.4 _______________________ (a) Fair value for all debt instruments was estimated from Level 2 measurements. The Company's investments in marketable securities are accounted for as "available-for-sale securities" in accordance with ASC Topic 320, Investments — Debt and Equity Securities ("ASC Topic 320"). Pursuant to ASC Topic 320, marketable securities are reported at fair value on the consolidated balance sheet and holding gains and losses are reported in "Other Income (Expense), net" on the Company's consolidated statements of operations. At December 31, 2019 , the Company had $4.0 million in marketable securities classified as Other assets on the consolidated balance sheet. The cost of such marketable securities was $4.4 million . Fair value for the Company's marketable securities was estimated from Level 1 inputs. The Company's marketable securities are designated for the payment of benefits under its supplemental employee retirement plan ("SERP"). Fair Value of Pension Plan Assets With the exception of cash and cash equivalents which are considered Level 1, and the annuity contracts which are considered Level 3, pension plan assets are measured at Net Asset Value ("NAV") (or its equivalent) as an alternative to fair market value due to the absence of readily available market prices, and as such are not subject to the fair value hierarchy. Following is the fair value of each investment category: • Cash and cash equivalents ( $0.8 million and $1.7 million at December 31, 2019 and 2018 , respectively). • U.S and non-U.S. Equities ( $122.5 million and $107.8 million at December 31, 2019 and 2018 , respectively) — These proprietary collective funds have observable NAVs (based on the fair value of the underlying investments of the funds) that are provided to investors and provide for liquidity either immediately or within a few days. • U.S and non-U.S. Fixed Income Securities ( $219.4 million and $192.7 million at December 31, 2019 and 2018 , respectively) — These proprietary collective funds have observable NAVs (based on the fair value of the underlying investments of the funds) that are provided to investors and provide for liquidity either immediately or within a few days. • Hedge Fund/Other ( $29.9 million and $27.9 million at December 31, 2019 and 2018 , respectively) — This fund is valued using NAVs calculated by the underlying investment managers and allow for quarterly or more frequent redemptions. In conjunction with the Coldenhove Acquisition, there were purchases of $46.8 million into Level 3 plan assets during the year ended December 31, 2017, as the defined benefit plan for Neenah Coldenhove is administered through an insurance contract. The following table summarizes the changes in Level 3 defined benefit pension plan assets (Neenah Coldenhove insurance contract) measured at fair value on a recurring basis for the year ended December 31, 2019 and 2018 : Return on plan assets Fair Value at January 1 Attributable to Assets Held at December 31 Attributable to Assets Sold Net Purchases/ (Settlements) Transfers into/ (out of) Level 3 Foreign currency effects Fair For the year ended December 31, 2017 $ — 0.2 — 46.9 — 1.3 $ 48.4 For the year ended December 31, 2018 $ 48.4 (0.9 ) — (0.3 ) — (2.1 ) $ 45.1 For the year ended December 31, 2019 $ 45.1 7.5 — (0.2 ) — (0.9 ) $ 51.5 Discontinued Operations During the three months ended September 30, 2018, the Company recorded an additional loss on sale of $0.8 million arising from the final adjustment to the transaction price on the sale of the Lahnstein Mill in 2015. Accounting Standards Changes In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) ("ASU 2016-02"). ASU 2016-02 requires lessees to put most leases on their balance sheets but recognize expenses on their income statements in a manner similar to current lease accounting. The amendments in this ASU are effective January 1, 2019. In July 2018, the FASB issued ASU 2018-11, Leases - Targeted Improvements, to allow a company to elect an optional modified retrospective transition method that applies the new lease requirements through a cumulative-effect adjustment in the period of adoption. Effective January 1, 2019, the Company adopted the new lease accounting standard using the modified retrospective transition option of applying the new standard at the adoption date. The Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification. The most significant change was related to the recognition of $16 million of right-of-use assets and corresponding lease liabilities of $17 million on its consolidated balance sheet as of January 1, 2019. The adoption of this standard did not have a material impact related to existing leases and as a result, a cumulative-effect adjustment was not recorded. See Note 11, "Leases." In March 2017, the FASB issued ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (Topic 715) . ASU 2017-07 requires entities to (1) disaggregate the current service-cost component from the other components of net benefit cost (the "other components") and present it with other current compensation costs for related employees in the income statement and (2) present the other components elsewhere in the income statement and outside of income from operations if such a subtotal is presented. In addition, only the service-cost component of net benefit cost is eligible for capitalization in inventories. The Company adopted this ASU as of January 1, 2018. As a result of the adoption, the Company reclassified $1.5 million and $1.2 million of net cost for the year ended December 31, 2017, of other components of net benefit cost from "Cost of products sold" and "Selling, general and administrative expenses" to "Other Expense - net" on the consolidated statements of operations. There was no other material impact on its consolidated financial statements due to the adoption. As of December 31, 2019 , no other amendments to the ASC had been issued and not adopted by the Company that will have or are reasonably likely to have a material effect on the its financial position, results of operations or cash flows.

Earnings per Share ("EPS")

Earnings per Share ("EPS")	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings per Share (EPS)	Earnings per Share ("EPS") The Company's restricted stock units ("RSUs") are paid non-forfeitable common stock dividends and thus meet the criteria of participating securities. Accordingly, basic EPS has been calculated using the two-class method, under which earnings are allocated to both common stock and participating securities. Basic EPS has been computed by dividing net income allocated to common stock by the weighted average common shares outstanding. For the computation of basic EPS, weighted average RSUs outstanding are excluded from the calculation of weighted average shares outstanding. ASC Topic 260, Earnings per Share ("ASC Topic 260") requires companies with participating securities to calculate diluted earnings per share using the "two class" method. The "two class" method requires first calculating diluted earnings per share using a denominator that includes the weighted average share equivalents from the assumed conversion of dilutive securities. Diluted earnings per share is then calculated using net income reduced by the amount of distributed and undistributed earnings allocated to participating securities calculated using the "Treasury Stock" method and a denominator that includes the weighted average share equivalents from the assumed conversion of dilutive securities excluding participating securities. Companies are required to report the lower of the diluted earnings per share amounts under the two calculations subject to the anti-dilution provisions of ASC Topic 260. Diluted EPS has been computed by dividing net income allocated to common stock by the weighted average number of common shares used in computing basic EPS, further adjusted to include the dilutive impact of the exercise or conversion of common stock equivalents, such as stock options, stock appreciation rights ("SARs") and target awards of RSUs with performance conditions ("Performance Share Units" or "PSUs"), into shares of common stock as if those securities were exercised or converted. For the years ended December 31, 2019 , 2018 and 2017 , approximately 231,000 , 143,000 and 72,000 potentially dilutive options, respectively, were excluded from the computation of dilutive common shares because the exercise price of such options exceeded the average market price of the Company's common stock for the respective 12 -month periods during which the options were outstanding. The following table presents the computation of basic and diluted shares of common stock used in the calculation of EPS (amounts in millions, except share and per share amounts): Earnings per basic common share Year Ended December 31, 2019 2018 2017 Income from continuing operations $ 55.4 $ 37.2 $ 80.3 Amounts attributable to participating securities (0.3 ) (0.2 ) (0.6 ) Income from continuing operations available to common stockholders 55.1 37.0 79.7 Loss from discontinued operations, net of income taxes — (0.8 ) — Amounts attributable to participating securities — — — Net income available to common stockholders $ 55.1 $ 36.2 $ 79.7 Weighted-average basic shares outstanding 16,848 16,850 16,805 Basic earnings (loss) per share Continuing operations $ 3.27 $ 2.20 $ 4.74 Discontinued operations — (0.05 ) — $ 3.27 $ 2.15 $ 4.74 Earnings per diluted common share Year Ended December 31, 2019 2018 2017 Income from continuing operations $ 55.4 $ 37.2 $ 80.3 Amounts attributable to participating securities (0.3 ) (0.4 ) (0.5 ) Income from continuing operations available to common stockholders 55.1 36.8 79.8 Loss from discontinued operations, net of income taxes — (0.8 ) — Amounts attributable to participating securities — — — Net income available to common stockholders $ 55.1 $ 36.0 $ 79.8 Weighted-average basic shares outstanding 16,848 16,850 16,805 Add: Assumed incremental shares under stock-based compensation plans 58 118 247 Weighted average diluted shares 16,906 16,968 17,052 Diluted earnings (loss) per share Continuing operations $ 3.26 $ 2.17 $ 4.68 Discontinued operations — (0.05 ) — $ 3.26 $ 2.12 $ 4.68

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Acquisitions	Acquisitions On November 1, 2017, the Company purchased all of the outstanding equity of Neenah Coldenhove for net cash of approximately $43 million . Neenah Coldenhove is a specialty materials manufacturer based in the Netherlands, with a leading position in digital transfer media and other technical products. The Company accounted for the transaction using the acquisition method in accordance with ASC Topic 805, Business Combinations ("ASC Topic 805"). The allocation of the purchase price was based on estimates of the fair value of assets acquired and liabilities assumed as of November 1, 2017. The Company did not recognize any in-process research and development assets as part of the acquisition. The following table summarizes the allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed as of December 31, 2017. December 31, 2017 Assets Acquired Cash and cash equivalents $ 4.9 Accounts receivable 4.7 Inventories (a) 12.7 Deferred income taxes 0.4 Prepaid and other current assets 0.2 Property, plant and equipment (a) 31.2 Non-amortizable intangible assets 1.2 Amortizable intangible assets 4.7 Acquired goodwill (a) 10.0 Other assets 0.1 Total assets acquired 70.1 Liabilities Assumed Accounts payable 4.1 Accrued expenses 5.4 Contingent liability (b) 2.3 Deferred income taxes (a) 3.5 Noncurrent employee benefits 4.9 Long-term debt 1.8 Other noncurrent obligations 0.1 Total liabilities assumed 22.1 Net assets acquired $ 48.0 _______________________ (a) The Company had up to 12 months from the closing of the acquisition to finalize its valuations. Management evaluated additional information and determined that the preliminary valuation of inventory at the acquisition date should have been determined using fair value assumptions that would have resulted in the fair value of inventory being lower than originally estimated primarily due to changes in the assumptions related to inventory margins of the acquired business. In addition, management evaluated additional information related to fixed assets and updated the preliminary valuation of fixed assets at the acquisition date. Accordingly, during the nine months ended September 30, 2018, adjustments were made to reduce the carrying value of inventories and fixed assets by $1.5 million , with a corresponding increase to the value of goodwill of $1.1 million , net of income taxes. (b) In conjunction with the acquisition, the Company assumed a contingent liability of $2.3 million related to the acquisition of direct customer relationships by Neenah Coldenhove, which amount was contingent on the growth of sales from these customer relationships in 2018 and 2019. During the year ended December 31, 2018, the Company reduced the estimated liability to $0.8 million and recognized a receivable of $2.4 million from the former shareholders of Neenah Coldenhove related to a claim under an escrow arrangement. These two items totaling $3.9 million were recognized as income during the year ended December 31, 2018, as they relate to the operating results subsequent to the acquisition. These amounts were settled during the year ended December 31, 2019. The Company estimated the fair value of the assets and liabilities acquired in accordance with ASC Topic 820, Fair Value Measurements and Disclosures ("ASC Topic 820"). The fair value of amortizable and non-amortizable intangible assets was estimated by applying a royalty rate to projected revenue, net of income tax impacts and adjusted for present value considerations. The Company estimated the fair value of acquired property, plant and equipment using a combination of cost and market approaches. In general, the fair value of other acquired assets and liabilities was estimated using the cost basis of Neenah Coldenhove. The excess of the purchase price over the estimated fair value of the tangible net assets and identifiable intangible assets acquired was recorded as acquired goodwill. The factors contributing to the amount of goodwill recognized are based on several strategic and synergistic benefits that are expected to be realized from the acquisition of Neenah Coldenhove. These benefits include entry into profitable new markets for performance materials with new capabilities and recognized brands and synergies from combining the business with Neenah's existing infrastructure. None of the goodwill recognized as part of the Coldenhove Acquisition will be deductible for income tax purposes. All of the acquired goodwill was allocated to the Technical Products segment. For the year ended December 31, 2018, the Company incurred $0.5 million of integration costs. For the year ended December 31, 2017, the Company incurred $1.3 million of acquisition and restructuring costs. For the year ended December 31, 2017, the Company recorded net sales of $7.5 million and insignificant loss from operations before income taxes (excluding the acquisition related costs described above) for the acquired business. The following selected unaudited pro forma consolidated statements of operations data for the year ended December 31, 2017 was prepared as though the Coldenhove Acquisition had occurred on January 1, 2016. The information does not reflect future events that may occur after the acquisition or any operating efficiencies or inefficiencies that may result from the Coldenhove Acquisition. Therefore, the information is not necessarily indicative of results that would have been achieved had the businesses been combined during the periods presented or the results that the Company will experience going forward. Year Ended December 31, 2017 Net sales $ 1,019.8 Operating income 108.9 Net income $ 83.0 Earnings Per Common Share Basic $ 4.90 Diluted $ 4.84

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The Company follows the guidance of ASC Topic 805, Business Combinations ("ASC Topic 805"), in recording goodwill arising from a business combination as the excess of purchase price over the fair value of identifiable assets acquired and liabilities assumed. The Company tests goodwill for impairment at least annually on November 30 in conjunction with preparation of its annual business plan, or more frequently if events or circumstances indicate it might be impaired. The Company tested goodwill for impairment as of November 30, 2019 under ASC Topic 350, Intangibles — Goodwill and Other . The Company elected the option under ASC Topic 350, Intangibles — Goodwill and Other, to perform a qualitative assessment of the Company's reporting units to determine whether further impairment testing is necessary. In this qualitative assessment, the Company considered the following items for each of the reporting units: macroeconomic conditions, industry and market conditions, overall financial performance and other entity specific events. In addition, for each of these reporting units, the most recent fair value determination results in an amount that exceeds the carrying amount of the reporting units. Based on these assessments, the Company determined that the likelihood that a current fair value determination would be less than the current carrying amount of the reporting unit is not more likely than not. There was no impairment in the carrying value of goodwill for the years ended December 31, 2019 , 2018 and 2017 , with the exception of $0.1 million of goodwill impairment related to the sale of the Brattleboro mill in 2018. See Note 13, "Sale of Brattleboro mill and Impairment Loss." Intangible assets with finite useful lives are amortized on a straight-line basis over their respective estimated useful lives to their estimated residual values, and reviewed for impairment in accordance with ASC Topic 360, Property, Plant, and Equipment . Intangible assets consist primarily of customer relationships, trade names and acquired intellectual property. Such intangible assets are amortized using the straight-line method over estimated useful lives of between 10 and 15 years. Certain trade names are estimated to have indefinite useful lives and as such are not amortized. Intangible assets with indefinite lives are reviewed for impairment at least annually. There was no impairment in the carrying value of intangible assets with indefinite lives for the years ended December 31, 2019 , 2018 and 2017 . The following table presents the carrying value of goodwill by business segment and changes in the carrying value of goodwill. Technical Products Fine Paper and Other Gross Accumulated Gross Amount Accumulated Gross Accumulated Net Net Net Net Balance at December 31, 2017 $ 128.3 $ (49.6 ) $ 78.7 $ 6.2 — 6.2 $ 0.4 — 0.4 $ 85.3 Adjustment of goodwill acquired in the Coldenhove Acquisition (a) 1.1 — 1.1 — — — — — — 1.1 Impairment related to the Brattleboro mill and associated office and research facilities (b) — — — — — — — (0.1 ) (0.1 ) (0.1 ) Foreign currency translation (4.5 ) 2.2 (2.3 ) — — — — — — (2.3 ) Balance at December 31, 2018 124.9 (47.4 ) 77.5 6.2 — 6.2 0.4 (0.1 ) 0.3 84.0 Realignment of Other segment (c) 0.4 (0.1 ) 0.3 — — — (0.4 ) 0.1 (0.3 ) — Foreign currency translation (1.9 ) 1.0 (0.9 ) — — — — — — (0.9 ) Balance at December 31, 2019 $ 123.4 $ (46.5 ) $ 76.9 $ 6.2 $ — $ 6.2 $ — $ — $ — $ 83.1 _______________________ (a) As a result of finalizing the acquisition accounting for Neenah Coldenhove in 2018, an adjustment of $ 1.1 million , net of income taxes, was recorded as a reduction to inventory and fixed assets and increase to goodwill. (b) In conjunction with the sale of the Brattleboro mill, a goodwill impairment loss of $ 0.1 million was recognized in 2018. (c) In January 2019, the Company realigned the remaining products manufactured in the Other business segment to be managed as part of the Technical Products business segment. See Note 14, "Business Segment and Geographic Information." Other Intangible Assets As of December 31, 2019 , the Company had net identifiable intangible assets of $66.7 million . All such intangible assets were acquired in the acquisitions of Neenah Germany, Fox River, FiberMark, Neenah Coldenhove and the Crane technical materials business, and the acquisition of the Wausau and Southworth brands. The following table details amounts related to those assets. 12/31/2019 12/31/2018 Gross Accumulated Gross Accumulated Amortizable intangible assets Customer based intangibles $ 38.2 $ (20.4 ) $ 38.3 $ (18.2 ) Trade names and trademarks 5.1 (2.7 ) 5.1 (2.5 ) Acquired technology 16.9 (8.0 ) 16.9 (6.7 ) Total amortizable intangible assets 60.2 (31.1 ) 60.3 (27.4 ) Trade names 37.6 — 37.8 — Total $ 97.8 $ (31.1 ) $ 98.1 $ (27.4 ) The following table presents intangible assets acquired in conjunction with the Coldenhove Acquisition as of December 31, 2017: Intangibles Estimated Useful Intangible assets — definite lived Trade names and trademarks $ 0.5 10 Customer based intangibles 2.9 15 Acquired technology 1.3 4 Total 4.7 Non-amortizable trade names 1.2 Total intangible assets $ 5.9 As of December 31, 2019 , $43.1 million and $23.6 million of such intangible assets are reported within the Technical Products and Fine Paper and Packaging, respectively. See Note 14, "Business Segment and Geographic Information." Aggregate amortization expense of acquired intangible assets for the years ended December 31, 2019 , 2018 and 2017 was $3.9 million , $4.3 million and $3.7 million , respectively and was reported in Cost of products sold on the consolidated statement of operations. Estimated amortization expense for the years ended December 31, 2020 , 2021 , 2022 , 2023 and 2024 is $3.7 million , $3.5 million , $2.9 million , $2.7 million and $2.7 million , respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company accounts for income taxes in accordance with ASC Topic 740, Income Taxes . Income tax expense represented 16.7 percent , 9.5 percent and 12.4 percent of income from continuing operations before income taxes for the years ended December 31, 2019 , 2018 and 2017 , respectively. On December 22, 2017, the U.S. government enacted comprehensive tax legislation in the Tax Cuts and Jobs Act of 2017 (the "Tax Act"). The Tax Act significantly revised the U.S. corporate income tax by, among other things, reducing the statutory corporate tax rate from 35% to 21% effective January 1, 2018, eliminating certain deductions, imposing a mandatory one-time tax on accumulated earnings of foreign subsidiaries, introducing new tax regimes and changing how foreign earnings are subject to U.S. tax. The Tax Act also enhanced and extended through 2026 the option to claim accelerated depreciation deductions on qualified property. In conjunction with the tax law changes, the Securities and Exchange Commission ("SEC") in Staff Accounting Bulletin No. 118 ("SAB 118") provided for a measurement period of one year from the enactment date to finalize the accounting for effects of the Tax Act. As of December 31, 2017, the Company provisionally recorded an income tax benefit of $6.5 million related to the Tax Act. This amount was comprised of a $10.3 million tax benefit from the remeasurement of federal net deferred income tax liabilities resulting from the reduction in the U.S. statutory corporate tax rate to 21% from 35%, less $3.8 million of tax expense from the mandatory one-time tax on the previously untaxed accumulated earnings and profits ("E&P") of its foreign subsidiaries. Also, as of December 31, 2017, the Company early adopted ASU 2018-02, Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income (Topic 740) and reclassified $10.9 million from AOCI to retained earnings to address the stranded tax effects resulting from the effect of lower tax rates in the Tax Act on items within AOCI. In June 2017, as part of the annual strategic plan review, the Company reassessed its intentions regarding the indefinite reinvestment of undistributed earnings of the German operations and asserted its intent to indefinitely reinvest them. As a result, effective in the second quarter of 2017, the Company did not provide deferred income taxes on 2017 unremitted earnings of the German operations. In addition, in that quarter the deferred income tax liability of $4.1 million which was recorded in 2016 on unremitted German earnings was eliminated with a reduction to 2017 income tax expense. As noted above, the Tax Act included a mandatory one-time tax on previously untaxed accumulated E&P of its foreign subsidiaries, and as a result, previously unremitted E&P from all foreign countries were subject to this U.S. tax and a liability of $3.8 million was recorded thereon as of December 31, 2017. During 2018, the Company completed its analysis of the Tax Act and interpreted additional guidance issued by the U.S. Treasury Department. In addition, legislative actions by the various U.S. states related to application of the Tax Act provisions on state tax returns was considered. The Company recorded additional adjustments throughout 2018 to reflect a measurement-period tax benefit of $0.9 million related to the effects of the statutory corporate tax rate reduction and a measurement-period tax expense of $0.8 million from U.S. federal and state taxes on accumulated E&P of its foreign subsidiaries. As of December 31, 2018, a cumulative net tax benefit of $6.6 million related to the Tax Act was reflected, comprised of a $11.2 million tax benefit from the remeasurement of federal net deferred income tax liabilities resulting from the reduction in the U.S. statutory corporate tax rate, less $4.6 million of tax expense from the mandatory one-time U.S. federal tax on certain previously untaxed accumulated E&P of its foreign subsidiaries and related state income tax impacts. As of December 31, 2018, the measurement period for purposes of SAB 118 ended and the Company completed the accounting for all of the impacts of the Tax Act. As of December 31, 2017, the Company was not yet able to reasonably estimate the effects for the Global Intangible Low-Taxed Income ("GILTI") provisions of the Tax Act, therefore no provisional effects were recorded. Also, at that time, the Company had not made a policy decision regarding whether to record deferred income taxes on GILTI or use the period cost method. During the three months ended March 31, 2018, the Company elected an accounting policy to record GILTI tax expense as a period cost, if and when incurred each year. Also, beginning in that quarter, the Company was able to reasonably estimate the annual effects of GILTI and reflects this effect in its annual effective tax rate. The following table presents the principal reasons for the difference between the Company's effective income tax rate and the U.S. federal statutory income tax rate: Year Ended December 31, 2019 2019 2018 2018 2017 2017 U.S. federal statutory income tax rate 21.0 % $ 14.0 21.0 % $ 8.6 35.0 % $ 32.1 U.S. state income taxes, net of federal income tax benefit 1.4 % 0.9 (1.0 )% (0.4 ) 1.9 % 1.7 Foreign tax rate differences (a) 3.6 % 2.4 6.8 % 2.8 (3.4 )% (3.1 ) Tax on foreign dividends (b) 0.9 % 0.6 3.6 % 1.5 (0.3 )% (0.3 ) Foreign financing structure (c) (3.0 )% (2.0 ) (5.1 )% (2.1 ) (2.2 )% (2.0 ) Change in statutory tax rates (d) — % — (3.9 )% (1.6 ) (10.6 )% (9.7 ) Research and development and other tax credits (6.2 )% (4.1 ) (10.5 )% (4.3 ) (3.3 )% (3.0 ) Excess tax benefits from stock compensation (0.2 )% (0.1 ) (2.9 )% (1.2 ) (4.9 )% (4.5 ) Uncertain income tax positions (1.9 )% (1.3 ) 2.0 % 0.8 0.8 % 0.7 Other differences, net 1.1 % 0.7 (0.5 )% (0.2 ) (0.6 )% (0.5 ) Effective income tax rate 16.7 % $ 11.1 9.5 % $ 3.9 12.4 % $ 11.4 _______________________ (a) Represents the impact on the Company's effective tax rate due the mix of earnings among taxing jurisdictions with differing statutory rates. In 2019 and 2018, the U.S. federal tax rate is lower than the tax rate in Germany and the Netherlands. (b) For 2017, the amount reflects the net benefit of the indefinite reinvestment assertion of $4.1 million , less the $3.8 million mandatory one-time tax on the accumulated E&P of foreign subsidiaries from the Tax Act. For 2018, the amount reflects a measurement-period adjustment of $0.8 million to the mandatory one-time tax on the accumulated E&P of foreign subsidiaries, and in 2019 and 2018 includes federal GILTI impacts and state taxation of foreign E&P. (c) Represents the impact on the Company's effective tax rate of the Company's financing strategies. (d) Represents the net benefit from remeasurement of the net deferred income tax liabilities from tax rate changes. For 2017, the amount reflects a tax benefit of $10.3 million from the Tax Act, less $0.6 million of tax expense from a state tax rate change in Germany. For 2018, the amount reflects an additional measurement-period tax benefit adjustment of $0.9 million from the Tax Act, plus $0.7 million of tax benefit from a federal tax rate change in the Netherlands. The Company's effective income tax rate can be affected by many factors, including but not limited to, changes in the mix of earnings in taxing jurisdictions with differing statutory rates, the impact of research and development tax credits ("R&D Credits"), changes in tax laws and changes in corporate structure as a result of business acquisitions and dispositions. In addition to the impact of the reduction in the U.S. federal statutory tax rate from 35% to 21%, the 2018 effective income tax rate was significantly reduced by the effects of the $31.1 million impairment loss of the Brattleboro mill and associated research and office facilities (see Note 13), as similar sized reconciling items had a larger percentage impact on lower pre-tax book income. The following table presents the U.S. and foreign components of income from continuing operations before income taxes: Year Ended December 31, 2019 2018 2017 Income (loss) from continuing operations before income taxes: U.S. $ 30.1 $ (1.7 ) $ 53.6 Foreign 36.4 42.8 38.1 Total $ 66.5 $ 41.1 $ 91.7 The following table presents the components of the provision (benefit) for income taxes: Year Ended December 31, 2019 2018 2017 Provision (benefit) for income taxes: Current: Federal $ 0.3 $ (3.0 ) $ 4.7 State (0.2 ) 0.1 0.5 Foreign 7.6 8.7 6.4 Total current income tax provision 7.7 5.8 11.6 Deferred: Federal 3.0 (0.6 ) (1.8 ) State 0.8 (0.2 ) (0.1 ) Foreign (0.4 ) (1.1 ) 1.7 Total deferred income tax provision 3.4 (1.9 ) (0.2 ) Total provision for income taxes $ 11.1 $ 3.9 $ 11.4 The current federal and state tax provisions were reduced in 2018 as a result of incremental pension contributions which could be applied to the 2017 tax year at the 35% federal rate and from refund of half of the Alternative Minimum Tax credits. The 2018 federal and state deferred income tax provision was reduced by the effects of the book impairment loss of the Brattleboro mill in excess of the write-off of its tax basis. In 2017, the federal deferred income tax provision was reduced by a net $8.1 million as a result of the Tax Act and the German tax rate increase. This amount included $10.3 million of tax rate reduction from the Tax Act, less $0.6 million from the German tax rate increase, less $1.6 million of impact of the mandatory one-time tax on the accumulated earnings of foreign subsidiaries from the Tax Act. The 2017 federal current tax provision was increased by $2.2 million due to the mandatory one-time tax on foreign earnings. The Company has elected to treat its Canadian subsidiary as a branch for U.S. income tax purposes. Therefore, its pre-tax loss, arising primarily from employee benefit plan costs, is included in determining U.S. federal and state income taxes. The asset and liability approach is used to recognize deferred income tax assets and liabilities for the expected future tax consequences of temporary differences between the carrying amounts and the tax basis of assets and liabilities. The components of deferred income tax assets and liabilities, net of reserves for uncertain tax positions and valuation allowances, are as follows: December 31, 2019 2018 Deferred income tax assets (liabilities) Research and development tax credits $ 21.5 $ 20.0 Employee benefits 15.9 16.5 Net operating losses and other tax credits 6.4 7.4 Lease liabilities 3.1 — Accrued liabilities 2.1 2.3 Interest limitation — 1.7 Inventories (0.6 ) 1.0 Lease right-of-use assets (2.8 ) — Intangibles (4.7 ) (4.2 ) Accelerated depreciation (28.0 ) (28.8 ) Other 0.5 0.5 Net deferred income tax assets $ 13.4 $ 16.4 Deferred income tax assets (liabilities) Accelerated depreciation $ (16.7 ) $ (16.6 ) Intangibles (3.0 ) (3.2 ) Inventories (0.9 ) (1.0 ) Lease right-of-use assets (0.7 ) — Net operating losses 0.2 0.2 Lease liabilities 0.7 — Employee benefits 7.5 6.3 Other — (0.1 ) Net deferred income tax liabilities $ (12.9 ) $ (14.4 ) The presentation above reflects net deferred income tax assets of U.S. federal and state jurisdictions and the net deferred income tax liabilities related to operations of Germany, the Netherlands and the U.K. As of December 31, 2019 , the Company had $21.0 million of U.S. federal and $7.5 million of U.S. state R&D Credits which, if not used, will expire between 2031 and 2039 for the U.S. federal R&D Credits and between 2020 and 2034 for the state R&D Credits. As of December 31, 2019 , the Company had $44.1 million of state net operating losses (NOLs) which may be used to offset state taxable income. The NOLs are reflected in the consolidated financial statements as a deferred income tax asset of $2.7 million . If not used, substantially all of the NOLs will expire in various amounts between 2020 and 2039 . The Company had pre-acquisition and recognized built-in loss carryovers of $7.6 million , reflected as a deferred income tax asset of $1.6 million . The Company also had $0.7 million of federal Alternative Minimum Tax Credit carryovers, which under the Tax Act are fully refundable by no later than 2021. On January 1, 2018, the Company implemented ASU 2016-16, Accounting for Income Taxes: Intra-Entity Asset Transfers of Assets Other Than Inventory . The standard requires the recognition of the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. For the Company, the tax effects related to a 2017 transfer of intellectual property were affected by this standard. The standard was applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of January 1, 2018. The Company recorded a $2.9 million deferred income tax asset in the U.S. and eliminated a $3.7 million prepaid tax asset in Germany, each with offsets to retained earnings. As of December 31, 2019 and 2018, the Company had $48.8 million and $58.4 million , respectively, of undistributed earnings (net of foreign taxes) of foreign subsidiaries. Except for immaterial foreign currency exchange considerations, the Company will be able to repatriate these foreign earnings without U.S. federal taxation due to previously taxed income under the GILTI provisions. The Company or one of its subsidiaries files income tax returns in the U.S. federal jurisdiction, various U.S. state jurisdictions and foreign jurisdictions. The Company is no longer subject to U.S. federal examination for years before 2016, to state and local examinations for years before 2015 and to non-U.S. income tax examinations for years before 2013. The following is a tabular reconciliation of the total amounts of uncertain tax positions as of and for the years ended December 31, 2019 , 2018 and 2017 : For the Years Ended 2019 2018 2017 Balance at January 1, $ 10.1 $ 10.0 $ 10.3 Increases in prior period tax positions 0.7 0.1 0.4 Decreases in prior period tax positions (1.2 ) — (1.0 ) Increases in current period tax positions 0.6 0.8 0.7 Decreases due to lapse of statutes of limitations (1.5 ) (0.6 ) (1.0 ) Increases due to change in tax rates — 0.1 0.4 Decreases due to settlements with tax authorities (0.9 ) (0.2 ) — Increases (decreases) from foreign exchange rate changes — (0.1 ) 0.2 Balance at December 31, $ 7.8 $ 10.1 $ 10.0 The $7.8 million of reserves for uncertain tax positions as of December 31, 2019 were reflected on the consolidated balance sheets as follows: $7.3 million netted against deferred income tax assets and $0.5 million in other noncurrent obligations. The $10.1 million of reserves for uncertain tax positions as of December 31, 2018 were reflected on the consolidated balance sheets as follows: $7.9 million netted against deferred income tax assets, $2.2 million in other noncurrent obligations. The $10.0 million of reserves for uncertain tax positions as of December 31, 2017 were reflected on the consolidated balances as follows: $2.3 million netted against deferred income tax assets, $5.3 million netted against (added to) deferred income tax liabilities and $2.4 million in other noncurrent obligations. If recognized, $7.8 million of the benefit for uncertain tax positions at December 31, 2019 would favorably affect the Company's effective tax rate in future periods. The Company files income tax returns and is subject to examination by various taxing jurisdictions. The Company records uncertain tax positions in accordance with ASC 740 on the basis of a two-step process in which (1) it is determined whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position, and (2) for those tax positions that meet the more-likely-than-not recognition threshold, the Company recognizes the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority. The Company does not expect that facts and circumstances such as the expiration of statutes of limitations or the settlement of audits in the next 12 months will result in liabilities for uncertain income tax positions that are materially different than the amounts that were accrued as of December 31, 2019 . The Company recognizes accrued interest and penalties related to uncertain income tax positions in the Provision for income taxes on the consolidated statements of operations. As of December 31, 2019 and 2018 , the Company had less than $0.1 million and $0.1 million , respectively, accrued for interest and penalties related to uncertain income tax positions. As of December 31, 2019 and 2018, the Company had $5.2 million and $2.2 million of foreign tax credits, all of which the Company believes will expire unutilized. Therefore, as of December 31, 2019 and 2018, the Company recorded a valuation allowance of equal amounts against this deferred income tax asset. As of December 31, 2019 and 2018, the Company also had a valuation allowance of $0.5 million and $0.5 million , respectively, against its state tax credits and NOLs. In determining the need for a valuation allowance, the Company considers many factors, including specific taxing jurisdictions, sources of taxable income, income tax strategies and forecasted earnings for the entities in each jurisdiction. A valuation allowance is recognized if, based on the weight of available evidence, the Company concludes that it is more likely than not that some portion or all of the deferred income tax asset will not be realized.

Debt

Debt	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Debt	Debt Long-term debt consisted of the following: December 31, 2019 2018 2021 Senior Notes (5.25% fixed rate) due May 2021 $ 175.0 $ 175.0 Global Revolving Credit Facilities (variable rates) due December 2023 21.6 57.9 Second German Loan Agreement (2.45% fixed rate) due in quarterly installments ending September 2022 3.5 4.8 Third German Loan Agreement (1.45% fixed rate) due in quarterly installments ending September 2022 3.7 4.9 Deferred financing costs (3.0 ) (3.5 ) Total Debt 200.8 239.1 Less: Debt payable within one year 2.6 2.3 Long-term debt $ 198.2 $ 236.8 Unsecured 2021 Senior Notes In May 2013, the Company completed an underwritten offering of eight -year senior unsecured notes (the "2021 Senior Notes") at a face amount of $175 million . The 2021 Senior Notes bear interest at a rate of 5.25% , payable in arrears on May 15 and November 15 of each year, commencing on November 15, 2013, and mature on May 15, 2021. Proceeds from this offering were used to redeem the remaining $70 million outstanding principal amount of ten -year 7.375% senior unsecured notes, originally issued on November 30, 2004, to repay approximately $56 million in outstanding revolving credit agreement borrowings and for general corporate purposes. The 2021 Senior Notes are fully and unconditionally guaranteed by substantially all of the Company's domestic subsidiaries (the "Guarantors"). The 2021 Senior Notes were sold in a private placement transaction, have not been registered under the Securities Act of 1933, as amended, and may not be offered or sold absent registration or an applicable exemption from registration requirements. The 2021 Senior Notes rank equally in right of payment with all the Company's existing and future senior unsecured indebtedness. The guarantees of the 2021 Senior Notes are senior unsecured obligations of the Guarantors and rank equally in right of payment with all existing and future senior unsecured indebtedness of the Guarantors. The 2021 Senior Notes and the guarantees of the 2021 Senior Notes are effectively subordinated to the Company's and the Guarantors' existing and future secured indebtedness (to the extent of the value of the collateral) and are structurally subordinated to all indebtedness and other obligations of the Company's subsidiaries that do not guarantee the 2021 Senior Notes, including the trade creditors of such non-guarantor subsidiaries. Terms, Covenants and Events of Default. The 2021 Senior Notes contain terms, covenants and events of default with which the Company must comply, which the Company believes are ordinary and standard for notes of this nature. Among other things, the 2021 Senior Notes contain covenants restricting the Company's ability to incur certain additional debt, make specified restricted payments, pay dividends, authorize or issue capital stock, enter into transactions with the Company's affiliates, consolidate or merge with or acquire another business, sell certain of the Company's assets or liquidate, dissolve or wind-up the Company. As of December 31, 2019 , the Company was in compliance with all terms of the indenture for the 2021 Senior Notes. Under the most restrictive terms of the 2021 Senior Notes, the Company is permitted to pay cash dividends of up to $25 million in a calendar year, but not permitted to repurchase shares of the Company's common stock. However, as long as the net leverage ratio (net debt/EBITDA) under the 2021 Senior Notes is below 2.5 x, the Company can pay dividends or repurchase shares without limitation. In the event the net leverage ratio exceeds 2.5 x, the Company may still pay dividends in excess of $25 million or repurchase shares by utilizing "restricted payment baskets" as defined in the indenture for the 2021 Senior Notes. As of December 31, 2019 , since the Company's leverage ratio was less than 2.5 x, none of these covenants were restrictive to the Company's ability to pay dividends on or repurchase shares of the Company's common stock. Amended and Restated Secured Revolving Credit Facility In December 2018, the Company amended and restated its existing credit facility by entering into the Fourth Amended and Restated Credit Agreement (the "Fourth Amended Credit Agreement") by and among the Company and certain of its domestic subsidiaries as the "Domestic Borrowers", Neenah Services GmbH & Co. KG and certain of its German subsidiaries as the "German Borrowers", certain other subsidiaries as the "German Guarantors", the financial institutions signatory to the Fourth Amended Credit Agreement as lenders (the "Lenders"), and JPMorgan Chase Bank, N.A., as agent for the Lenders (the "Administrative Agent"). The Fourth Amended Credit Agreement, among other things: (1) increased the maximum principal amount of the existing credit facility for the Domestic Borrowers to $150 million (the "U.S. Revolving Credit Facility"); (2) maintains the secured, multicurrency, revolving credit facility for the German Borrowers in the maximum principal amount of $75 million (the "German Revolving Credit Facility," and together with the U.S. Revolving Credit Facility, the "Global Revolving Credit Facilities"); (3) caused the Company and the other Domestic Borrowers to guarantee, among other things, the obligations of the German Borrowers arising under the German Revolving Credit Facility; (4) provides for the Global Revolving Credit Facilities to mature on December 10, 2023; and (5) modifies the accordion feature permitting one or more increases in the Global Revolving Credit Facilities in an aggregate principal amount not exceeding $125 million , such that the aggregate commitments under the Global Revolving Credit Facilities do not exceed $350 million . In addition, the Domestic Borrowers may request letters of credit under the U.S. Revolving Credit Facility in an aggregate face amount not to exceed $20 million outstanding at any time, and the German Borrowers may request letters of credit under the German Revolving Credit Facility in an aggregate face amount not to exceed $5 million outstanding at any time. Proceeds of borrowings under the Global Revolving Credit Facilities may be used to finance working capital needs, permitted acquisitions, permitted investments (including certain inter-company loans), certain dividends, distributions and other restricted payments, and for other general corporate purposes. The consolidated statements of cash flows present borrowings and repayments under the Global Revolving Credit Facilities and the predecessor revolving bank credit facility using a gross approach. This approach presents not only discrete borrowings for transactions such as a business acquisition, but also reflects all borrowings and repayments that occur as part of daily management of cash receipts and disbursements. For the years ended December 31, 2019 and 2018, all of the borrowings related to the daily cash management. For the year ended December 31, 2017 , $31 million was borrowed in conjunction with the Coldenhove Acquisition and the remaining $ 293 million included borrowings for daily cash management. The right of the Domestic Borrowers to borrow and obtain letters of credit under the U.S. Revolving Credit Facility is subject to, among other things, the borrowing base of the Domestic Borrowers on a consolidated basis (the "Domestic Borrowing Base"). The right of the German Borrowers to borrow and obtain letters of credit under the German Revolving Credit Facility is similarly subject to a borrowing base requirement (the "German Borrowing Base"). The German Borrowing Base is initially determined on a combined basis for all German Borrowers. Under certain circumstances (including the occurrence of an event of default resulting from an act or omission of any German Borrower or German Guarantor), the Administrative Agent may require the German Borrowing Base to be determined separately for each of the German Borrowers. At its option the Company may, from time to time, allocate a portion of the Domestic Borrowing Base to the German Borrowing Base (resulting in a corresponding reduction of the Domestic Borrowing Base); however, the principal amount of borrowings and the outstanding letter of credit exposure under the German Revolving Credit Facility may not at any time exceed the German Revolving Credit Facility commitment amount then in effect. The guarantees of the German Guarantors are limited solely to the German Revolving Credit Facility obligations. Under the terms of the Fourth Amended Credit Agreement and related loan documentation, neither the German Borrowers nor the German Guarantors (collectively, the "German Loan Parties") will be liable for any obligations relating to the U.S. Revolving Credit Facility. The Global Revolving Credit Facilities are secured by liens on all or substantially all of the assets of the Domestic Borrowers. The German Revolving Credit Facility is secured by liens on all or substantially all of the assets of the German Borrowers and certain assets of the German Guarantors. Any liens granted by the German Loan Parties secure only the German Revolving Credit Facility obligations. Terms, Covenants and Events of Default. In general, borrowings under the Global Revolving Credit Facilities will bear interest at LIBOR (which cannot be less than zero percent ) plus an applicable margin ranging from 1.25% to 1.75% , depending on the amount of availability under the Fourth Amended Credit Agreement. In addition, the Company may elect an alternate borrowing rate ("ABR") for borrowings under the Global Revolving Credit Facilities. ABR borrowings under the Global Revolving Credit Facilities will bear interest at the highest interest rate shown in the following table: Applicable Margin U.S. Revolving Credit Facility German Revolving Credit Facility Prime rate 0.00%-0.25% Not applicable Federal funds rate +0.50% 0.00%-0.25% Not applicable Monthly LIBOR (which cannot be less than zero percent) +1.00% 0.00%-0.25% Not applicable Overnight LIBOR (which cannot be less than zero percent) Not applicable 1.25%-1.75% The Company is also required to pay a monthly commitment fee on the unused amounts available under the Global Revolving Credit Facilities at a per annum rate of 0.25% . If specified excess availability (i.e., aggregate availability, plus any excess of the aggregate borrowing base over the aggregate commitments under the Global Revolving Credit Facilities as then in effect, subject to certain limitations) under the Global Revolving Credit Facilities is less than the greater of (i) $20 million and (ii) 10% of the aggregate commitments under the Global Revolving Credit Facilities as then in effect, the Company is required to comply with a fixed charge coverage ratio (as defined in the Fourth Amended Credit Agreement) of not less than 1.1 to 1.0 for the preceding four-quarter period, tested as of the end of each quarter. Such compliance, once required, would no longer be necessary once (x) specified excess availability under the Global Revolving Credit Facilities exceeds the greater of (i) 17.5% of the aggregate commitment for the Global Revolving Credit Facilities and (ii) $35 million for 60 consecutive days and (y) no default or event of default has occurred and is continuing during such 60 -day period. As of December 31, 2019 , specified excess availability under the Global Revolving Credit Facilities exceeded the minimum required amount, and the Company is not required to comply with such fixed charge coverage ratio. The Fourth Amended Credit Agreement contains affirmative, reporting and negative covenants, events of default and other terms which the Company believes are ordinary and standard for agreements of this nature, with which the Company and its subsidiaries must comply during the term of the agreement. Among other things, such covenants restrict the ability of the Company and its subsidiaries to incur certain debt, incur or create certain liens, make specified restricted payments, authorize or issue capital stock, enter into transactions with their affiliates, consolidate, merge with or acquire another business, sell certain of their assets, or dissolve or wind up. In addition, if the specified excess availability under the Global Revolving Credit Facilities is less than the greater of (i) $25 million and (ii) 12.5% of the aggregate commitments under the Global Revolving Credit Facilities as then in effect, the Company will be subject to increased reporting obligations and controls until such time as availability is more than the greater of (a) $35 million and (b) 17.5% of the aggregate commitments under the Global Revolving Credit Facilities as then in effect. Under the terms of the Fourth Amended and Restated Credit Agreement, we are permitted to pay cash dividends on, and repurchase shares of, our common stock without limitation, as long as our specified excess availability under the Fourth Amended and Restated Credit Agreement exceeds the greater of (i) $25 million and (ii) 12.5% of our aggregate commitments under the Global Revolving Credit Facilities (approximately $28 million as of December 31, 2019), on a pro forma basis after giving effect to such dividend or stock repurchase (as the case may be). If our specified excess availability, on a pro forma basis, is less than the applicable threshold, we are subject to certain restrictions on the amount of cash dividends we are permitted to declare and the amount of share repurchases we are permitted to execute. As of December 31, 2019 , the Company's availability exceeded the applicable threshold, so this restriction did not apply. The Fourth Amended Credit Agreement also contains events of default customary for financings of this type, including failure to pay principal or interest, materially false representations or warranties, failure to observe covenants and certain other terms of the Fourth Amended Credit Agreement, cross-defaults to certain other indebtedness, bankruptcy, insolvency, various ERISA and foreign pension violations, the incurrence of material judgments and changes in control. Availability under the Global Revolving Credit Facilities varies over time depending on the value of the Company's inventory, receivables and various capital assets. As of December 31, 2019 , the Company had $21.6 million of borrowings and $0.5 million in letters of credit outstanding under the Global Revolving Credit Facilities and $173.5 million of available credit (based on exchanges rates at December 31, 2019 ). As of December 31, 2019 and 2018 , the weighted-average interest rate on outstanding Revolver borrowings was 1.3 percent and 2.9 percent per annum, respectively. Other Debt In January 2013, Neenah Germany entered into a project financing agreement for the construction of a melt blown machine (the "Second German Loan Agreement"). The agreement provided €9.0 million of construction financing which is secured by the melt blown machine. The loan matures in September 2022 and principal is repaid in 32 equal quarterly installments beginning in December 2014. The interest rate on amounts outstanding is 2.45% and is payable quarterly. At December 31, 2019 , €3.1 million ( $3.5 million , based on exchange rates at December 31, 2019 ) was outstanding under the Second German Loan Agreement. In May 2018, Neenah Germany entered into a project financing agreement for the construction of a regenerative thermal oxidizer ("RTO") (the "Third German Loan Agreement"). The purposes of the project were to increase the capacity of the existing saturators and ensure compliance with new European air emission standards. The agreement provided €5.0 million of financing and is secured by the asset. The loan matures in September 2022 and principal is repaid in 13 equal quarterly installments beginning in June 2019. The interest rate on amounts outstanding is 1.45% and is payable quarterly. In the fourth quarter 2018, the Company received a subsidy from the German government of $0.9 million due to completion of the RTO project in the form of a principal reduction. At December 31, 2019 , €3.3 million ( $3.7 million , based on exchange rates at December 31, 2019 ) was outstanding under the Third German Loan Agreement. Principal Payments The following table presents the Company's required debt payments: 2020 2021 2022 2023 2024 Thereafter Total Debt payments $ 2.6 $ 177.8 $ 1.8 $ 21.6 $ — $ — $ 203.8

Pension and Other Postretiremen

Pension and Other Postretirement Benefits	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Pension and Other Postretirement Benefits	Pension and Other Postretirement Benefits Pension Plans Substantially all active employees of the Company's U.S. operations participate in defined benefit pension plans and/or defined contribution retirement plans. The Company also has defined benefit plans and/or alternative retirement plans for substantially all its employees in Germany, the U.K, and the Netherlands. In addition, the Company maintains a SERP which is a non-qualified defined benefit plan. The Company provides benefits under the SERP to the extent necessary to fulfill the intent of its defined benefit retirement plans without regard to the limitations set by the Internal Revenue Code on qualified defined benefit plans. The Company's policy is to recognize settlement losses for deferred vested pension benefit payments regardless of whether the amount exceeded the sum of expected service cost and interest costs of the pension plan for the respective calendar year. During 2019, 2018, and 2017, the Company recorded a $0.1 million, $0.8 million, and a $0.6 million settlement losses in the SERP, for total payments of $0.5 million , $2.2 million , $1.3 million , respectively. The Company's funding policy for its U.S. qualified defined benefit plans and its U.K. defined benefit plan is to contribute assets in compliance with regulatory requirements to fund the projected benefit obligation. There is no legal or governmental obligation to fund Neenah Germany's benefit plans and as such the Neenah Germany defined benefit plans are currently unfunded. As of December 31, 2019 , Neenah Germany had investments of $2.0 million that were restricted to the payment of certain post-retirement employee benefits. As of December 31, 2019 , $1.4 million and $0.6 million of such investments are classified as Prepaid and other current assets and Other assets, respectively, on the consolidated balance sheet. The Neenah Coldenhove retirement benefit obligations are administered by a third-party insurance company, and funding for these benefits comes from premiums paid. Nonqualified plans providing pension benefits in excess of limitations imposed by taxing authorities are not funded; however, the Company holds $4.0 million of marketable securities that are designated for the payment of benefits under the SERP as of December 31, 2019 , classified as Other Assets on the consolidated balance sheet. During October 2019, the Company reached an agreement with the union members of the Christelijke Nationale Vakbond ("CNV") and the Federatie Nederlandse Vakvereniging ("FNV") that affected employees in the Netherlands. In accordance with the new agreements, effective December 31, 2019, the Neenah Coldenhove defined benefit pension plan is closed to new entrants, and the defined benefit pension plan was replaced by a new defined contribution plan. All new employees will participate in the new defined contribution plan, and current employees will have their benefit frozen at current levels under the defined benefit plan and will begin participation in the new defined contribution plan. The Company recognized a curtailment gain of $1.6 million in the fourth quarter of 2019 due to these changes. During November 2019, the Company ratified a new collective bargaining agreement with the USW that affected hourly employees at the Appleton Mill. In accordance with the new agreement, effective February 2020, the current defined benefit pension plan at this location will be closed to new entrants, and the defined benefit pension plan will be replaced by a new defined contribution plan. All new hourly employees will participate in the new defined contribution plan, and certain hourly employees ( 30 of 115 employees at this location) with less than 25 years of service will have their benefit frozen at current levels under the defined benefit plan and will begin participation in the new defined contribution plan. Hourly employees with over 25 years of service will continue to participate in the respective defined benefit plan. There were no curtailment or amendment charges recognized due to this change. During December 2018, the Company signed new collective bargaining agreements with the USW that affected hourly employees at the Munising Mill, Whiting Mill, Neenah Mill, and Neenah Finishing Center. In accordance with the new agreements, effective March 2019, the current defined benefit pension plans at these locations will be closed to new entrants, and the defined benefit pension plans will be replaced by a new defined contribution plan. All new hourly employees will participate in the new defined contribution plan, and certain hourly employees ( 375 of 690 employees at these locations) with less than 25 years of service will have their benefit frozen at current levels under the defined benefit plan and will begin participation in the new defined contribution plan. Hourly employees with over 25 years of service and certain other hourly employees will continue to participate in their respective defined benefit plans. There were no curtailment or amendment charges recognized due to these changes. The Company uses the fair value of pension plan assets to determine pension expense, rather than averaging gains and losses over a period of years. Investment gains or losses represent the difference between the expected return calculated using the fair value of the assets and the actual return based on the fair value of assets. The Company's pension obligations are measured annually as of December 31. Multi-Employer Plan Prior to July 1, 2018, the hourly employees of the Lowville, New York facility were covered by a multi-employer defined benefit plan. Effective on that date, the Company and representatives of the United Steelworkers Union (the "USW") of the Lowville mill initiated actions to withdraw from the Pace Industry Union-Management Pension Fund (“PIUMPF”). As a result, the Company recorded an estimated withdrawal liability of $1.0 million , which assumed payment of $0.1 million per year over 20 years , discounted at a credit adjusted risk-free rate of 5.7% . In October 2019, the Company received a billing from PIUMPF for the withdrawal liability, which confirmed the $1.0 million liability. In addition to the withdrawal liability, PIUMPF also demanded immediate payment of $1.3 million for the Company's pro-rata share of the fund's accumulated funding deficiency. The Company is challenging this demand and believes it to be unenforceable. As such, the Company has not recorded a liability for this amount as of December 31, 2019. For the year ended December 31, 2018, the Company's contributions to the plan were less than $0.1 million and less than 5% of total plan contributions. On July 1, 2018, when the Company withdrew, the plan was in the red zone. Among other factors, plans in the red zone are generally less than 65% funded. Other Postretirement Benefit Plans The Company maintains postretirement health care and life insurance benefit plans for active employees of the Company and former employees of the Canadian pulp operations. The Canadian plans are generally noncontributory for employees who were eligible to retire on or before December 31, 1992 and contributory for most employees who became eligible to retire on or after January 1, 1993. The Company does not provide a subsidized benefit to non-union U.S. employees hired after 2003 or collectively bargained employees after 2005. The Company's obligations for postretirement benefits other than pensions are measured annually as of December 31. The following table reconciles the benefit obligations, plan assets, funded status and net liability information of the Company's pension and other postretirement benefit plans. Pension Benefits Postretirement Year Ended December 31, 2019 2018 2019 2018 Change in Benefit Obligation: Benefit obligation at beginning of year $ 430.7 $ 463.9 $ 42.4 $ 44.0 Service cost 5.0 6.7 1.2 1.1 Interest cost 16.2 15.8 1.5 1.4 Currency (1.2 ) (4.6 ) 0.1 (0.3 ) Actuarial (gain) loss 55.0 (29.3 ) (0.7 ) 1.1 Benefit payments from plans (21.1 ) (20.3 ) (4.8 ) (4.9 ) Plan curtailment (a) (2.8 ) — — — Settlement payments (0.5 ) (2.2 ) — — Other 1.1 0.7 — — Benefit obligation at end of year $ 482.4 $ 430.7 $ 39.7 $ 42.4 Change in Plan Assets: Fair value of plan assets at beginning of year $ 375.2 $ 400.4 $ — $ — Actual gain (loss) on plan assets 62.1 (18.9 ) — — Employer contributions 8.3 18.2 — — Currency (0.5 ) (2.7 ) — — Benefit payments (21.1 ) (20.3 ) — — Settlement payments (0.5 ) (2.2 ) — — Other 0.6 0.7 — — Fair value of plan assets at end of year $ 424.1 $ 375.2 $ — $ — Reconciliation of Funded Status Fair value of plan assets $ 424.1 $ 375.2 $ — $ — Projected benefit obligation 482.4 430.7 39.7 42.4 Net liability recognized in statement of financial position $ (58.3 ) $ (55.5 ) $ (39.7 ) $ (42.4 ) Amounts recognized in statement of financial position consist of: Current liabilities $ (1.2 ) $ (1.7 ) $ (5.6 ) $ (5.2 ) Noncurrent liabilities (57.1 ) (53.8 ) (34.1 ) (37.2 ) Net amount recognized $ (58.3 ) $ (55.5 ) $ (39.7 ) $ (42.4 ) _______________________ (a) For the year ended December 31, 2019, the Company recognized a curtailment gain of $1.6 million related to the Neenah Coldenhove pension plan. See discussion earlier in this Note. Amounts recognized in accumulated other comprehensive income (loss) consist of: Pension Postretirement December 31, 2019 2018 2019 2018 Accumulated actuarial loss $ 117.8 $ 110.1 $ 7.2 $ 8.7 Prior service cost 0.9 0.7 — — Total recognized in AOCI $ 118.7 $ 110.8 $ 7.2 $ 8.7 Summary disaggregated information about the pension plans follows: December 31, Assets Exceed ABO ABO Exceed Assets Total 2019 2018 2019 2018 2019 2018 Projected benefit obligation $ — $ 130.3 $ 482.4 $ 300.4 $ 482.4 $ 430.7 Accumulated benefit obligation — 125.4 478.3 298.5 478.3 423.9 Fair value of plan assets — 128.8 424.1 246.4 424.1 375.2 Components of Net Periodic Benefit Cost Pension Benefits Postretirement Benefits Year Ended December 31, 2019 2018 2017 2019 2018 2017 Service cost $ 5.0 $ 6.7 $ 5.5 $ 1.2 $ 1.1 $ 1.2 Interest cost 16.2 15.8 15.0 1.5 1.4 1.4 Expected return on plan assets (a) (21.1 ) (21.0 ) (19.9 ) — — — Recognized net actuarial loss 4.9 5.2 5.6 0.9 0.8 0.3 Amortization of prior service cost (credit) 0.2 0.2 0.2 — (0.2 ) (0.2 ) Curtailment gain (1.6 ) — — — — — Amount of settlement loss recognized 0.1 0.8 0.6 — — — Net periodic benefit cost $ 3.7 $ 7.7 $ 7.0 $ 3.6 $ 3.1 $ 2.7 _______________________ (a) The expected return on plan assets, excluding the Neenah Coldenhove plan assets, is determined by multiplying the fair value of plan assets at the prior year-end (adjusted for estimated current year cash benefit payments and contributions) by the expected long-term rate of return. The Neenah Coldenhove pension plan is funded through an insurance contract, and the expected return on plan assets is calculated based on the discount rate of the insured obligations. Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) Pension Benefits Postretirement Benefits Year Ended December 31, 2019 2018 2017 2019 2018 2017 Net periodic benefit expense $ 3.7 $ 7.7 $ 7.0 $ 3.6 $ 3.1 $ 2.7 Accumulated actuarial gain (loss) 7.7 4.2 10.1 (1.5 ) 0.1 3.7 Prior service cost (credit) 0.2 (0.1 ) (0.1 ) — 0.2 0.2 Total recognized in other comprehensive income (loss) 7.9 4.1 10.0 (1.5 ) 0.3 3.9 Total recognized in net periodic benefit cost and other comprehensive income (loss) $ 11.6 $ 11.8 $ 17.0 $ 2.1 $ 3.4 $ 6.6 The estimated net actuarial loss and prior service cost for the defined benefit pension plans expected to be amortized from AOCI into net periodic benefit cost over the next fiscal year are $5.3 million and $0.3 million , respectively. The estimated net actuarial loss and prior service (credit) for postretirement benefits other than pensions expected to be amortized from AOCI into net periodic benefit cost over the next fiscal year is $0.6 million and $0.0 million , respectively. Weighted-Average Assumptions Used to Determine Benefit Obligations at December 31 Pension Benefits Postretirement Benefits Other than Pensions 2019 2018 2019 2018 Discount rate 2.98 % 3.94 % 2.68 % 3.84 % Rate of compensation increase 2.05 % 2.34 % — % — % Initial healthcare cost trend rate — % — % 6.10 % 6.80 % Ultimate healthcare cost trend rate — % — % 4.50 % 4.50 % Ultimate year — — 2037 2037 Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost for Years Ended December 31 Pension Benefits Postretirement Benefits Other than Pensions Year Ended December 31, 2019 2018 2017 2019 2018 2017 Discount rate 3.78 % 3.65 % 4.18 % 3.84 % 3.42 % 3.89 % Expected long-term return on plan assets (a) 5.91 % 5.78 % 6.31 % — % — % — % Rate of compensation increase 2.33 % 2.44 % 2.49 % 2.50 % 2.50 % — % Initial healthcare cost trend rate — % — % — % 6.50 % 6.80 % 7.00 % Ultimate healthcare cost trend rate — % — % — % 4.50 % 4.50 % 4.50 % Ultimate year — — — 2037 2037 2037 _______________________ (a) The expected long-term return on plan assets does not include the Neenah Coldenhove plan assets. The Neenah Coldenhove pension plan is funded through an insurance contract, and the expected return on plan assets is calculated based on the discount rate of the insured obligations. Expected Long-Term Rate of Return and Investment Strategies The expected long-term rate of return on pension fund assets held by the Company's pension trusts was determined based on several factors, including input from pension investment consultants and projected long-term returns of broad equity and bond indices. Also considered were the plans' historical compounded annual returns. It is anticipated that, on average, the managed pension plan assets will generate a return of 5 to 6 percent . The expected long-term rate of return on the assets in the plans was based on an asset allocation assumption of approximately 33 percent with equity managers, with expected long-term rates of return of approximately 8 to 10 percent , 8 percent with hedge funds/other, with expected long-term rates of return of approximately 5 to 7 percent , and 59 percent with fixed income managers, with an expected long-term rate of return of about 3 to 5 percent . The actual asset allocation is regularly reviewed and periodically rebalanced to the targeted allocation when considered appropriate. Plan Assets Pension plan asset allocations are as follows: Percentage of Plan 2019 2018 Asset Category (a) Equity securities 33 % 33 % Hedge fund / Other 8 % 8 % Debt securities / Fixed Income 59 % 58 % Cash and money-market funds — % 1 % Total 100 % 100 % _______________________ (a) The asset categories do not include the insurance contract related to the Neenah Coldenhove pension plan. The Company's investment objective for pension plan assets is to ensure, over the long-term life of the pension plans, an adequate pool of assets to support the benefit obligations to participants, retirees, and beneficiaries. Specifically, these objectives include the desire to: (a) invest assets in a manner such that future assets are available to fund liabilities, (b) maintain liquidity sufficient to pay current benefits when due and (c) diversify, over time, among asset classes so assets earn a reasonable return with acceptable risk to capital. The weighted average target investment allocation and permissible allocation range for plan assets by category are as follows: Strategic Target Permitted Range Asset Category Equity securities 33 % 28-38% Hedge fund / Other 8 % 3-13% Debt securities / Fixed Income 59 % 54-64% As of December 31, 2019 , no company or group of companies in a single industry represented more than 5 percent of plan assets. The Company's investment assumptions are established by an investment committee composed of members of senior management and are validated periodically against actual investment returns. As of December 31, 2019 , the Company's investment assumptions are as follows: (1) The plan should be substantially fully invested in debt and equity securities at all times because substantial cash holdings will reduce long-term rates of return; (2) Equity investments will provide greater long-term returns than fixed income investments, although with greater short-term volatility; (3) It is prudent to diversify plan investments across major asset classes; (4) Allocating a portion of plan assets to foreign equities will increase portfolio diversification, decrease portfolio risk and provide the potential for long-term returns; (5) Investment managers with active mandates can reduce portfolio risk below market risk and potentially add value through security selection strategies, and a portion of plan assets should be allocated to such active mandates; (6) A component of passive, indexed management can benefit the plans through greater diversification and lower cost, and a portion of the plan assets should be allocated to such passive mandates, and (7) It is appropriate to retain more than one investment manager, given the size of the plans, provided that such managers offer asset class or style diversification. For the years ended December 31, 2019 , 2018 and 2017 , no plan assets were invested in the Company's securities. Cash Flows At December 31, 2019 , the Company expects to make aggregate contributions to qualified and nonqualified defined benefit pension trusts and to pay pension benefits for unfunded pension and other postretirement benefit plans in 2020 of approximately $9 million (based on exchange rates at December 31, 2019 ). Future Benefit Payments The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid: Pension Plans Postretirement Benefits Other than Pensions 2020 $ 22.3 $ 5.6 2021 27.1 5.0 2022 23.3 4.6 2023 24.2 4.2 2024 25.0 3.9 Years 2025-2029 129.3 13.7 Health Care Cost Trends Assumed health care cost trend rates affect the amounts reported for postretirement health care benefit plans. A one percentage-point change in assumed health care cost trend rates would have the following effects: One Percentage- Point Increase Decrease Effect on total of service and interest cost components $ — $ — Effect on post-retirement benefit other than pension obligation 0.2 (0.2 ) Defined Contribution Retirement Plans Company contributions to defined contribution retirement plans are based on various factors for covered employees. Contributions to these plans, all of which were charged to expense, were $2.0 million in 2019 , $2.3 million in 2018 and $2.5 million in 2017 . In addition, the Company maintains a supplemental retirement contribution plan (the "SRCP") which is a non-qualified, unfunded defined contribution plan. The Company provides benefits under the SRCP to the extent necessary to fulfill the intent of its defined contribution retirement plans without regard to the limitations set by the Internal Revenue Code on qualified defined contribution plans. For the years ended December 31, 2019 , 2018 and 2017 , the Company recognized expense related to the SRCP of $0.4 million , $0.0 million and $0.4 million , respectively. At both December 31, 2019 and December 31, 2018 , the unfunded obligation of the SRCP was $1.7 million . Investment Plans The Company provides voluntary contribution investment plans to substantially all North American employees. Under the plans, the Company matches a portion of employee contributions. For the years ended December 31, 2019 , 2018 and 2017 , costs charged to expense for Company matching contributions under these plans were $4.7 million , $4.0 million and $3.7 million , respectively.

Stock Compensation Plans

Stock Compensation Plans	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Stock Compensation Plans	Stock Compensation Plans The Company established the 2004 Omnibus Stock and Incentive Plan (the "2004 Omnibus Plan") in December 2004 and reserved 3,500,000 shares of $0.01 par value common stock ("Common Stock") for issuance under the Omnibus Plan. Pursuant to the terms of the 2004 Omnibus Plan, the compensation committee of the Company's Board of Directors may grant various types of equity-based compensation awards, including incentive and nonqualified stock options, SARs, restricted stock, RSUs, Performance Units, in addition to certain cash-based awards. All grants under the Omnibus Plan will be made at fair market value and no grant may be repriced. In general, the options expire 10 years from the date of grant and vest over a 3 -year service period. At the 2018 Annual Meeting of Stockholders, the Company's stockholders approved an amendment and restatement of the 2004 Omnibus Plan (as amended and restated the "2018 Omnibus Plan"). The amendment and restatement authorized the Company to reserve an additional 800,000 shares of Common Stock for future issuance. As of December 31, 2019 , the Company had 1,091,000 shares of Common Stock reserved for future issuance under the 2018 Omnibus Plan. As of December 31, 2019 , the number of shares available for future issuance was reduced by approximately 177,000 shares for outstanding SARs where the closing market price for the Company's common stock was greater than the exercise price of the SAR. The Company accounts for stock-based compensation pursuant to the fair value recognition provisions of ASC Topic 718, Compensation — Stock Compensation ("ASC Topic 718"). Valuation and Expense Information Under ASC Topic 718 Substantially all stock-based compensation expense has been recorded in Selling, general and administrative expenses on the consolidated statements of operations. The following table summarizes stock-based compensation costs and related income tax benefits. Year Ended December 31, 2019 2018 2017 Stock-based compensation expense $ 5.6 $ 4.0 $ 6.4 Income tax benefit (1.4 ) (1.0 ) (2.5 ) Stock-based compensation, net of income tax benefit $ 4.2 $ 3.0 $ 3.9 The following table summarizes total compensation costs related to the Company's equity awards and amounts recognized in the year ended December 31, 2019 . Stock Options Performance Unrecognized compensation cost — December 31, 2018 $ 0.6 $ 2.1 Grant date fair value current year grants — 5.5 Compensation expense recognized (0.4 ) (5.2 ) Unrecognized compensation cost — December 31, 2019 $ 0.2 $ 2.4 Expected amortization period (in years) 1.1 1.6 Stock Options/SARs The Company grants nonqualified stock options to certain non-U.S. employees and Stock Appreciation Rights (SARs, and collectively 'stock options') to certain U.S. employees. Upon exercise, the holder of a SAR receives common shares equal to the number of SARs exercised multiplied by a fraction where the numerator is equal to the market price at the time of exercise minus the exercise price of the SAR and the denominator is equal to the market price at the time of exercise. The SARs can only be settled for shares of Common Stock and the Company does not receive any cash proceeds upon exercise. The following tables present information regarding stock options awarded during the years ended December 31, 2019 , 2018 and 2017 . 2019 2018 2017 Stock options granted 1,272 108,420 144,089 Per share weighted-average exercise price $ 66.59 $ 93.22 $ 82.11 Per share weighted-average grant date fair value $ 10.32 $ 15.00 $ 13.54 The weighted-average grant date fair value for stock options granted for the years ended December 31, 2019 , 2018 and 2017 was estimated using the Black-Scholes option valuation model with the following assumptions: 2019 2018 2017 Expected term in years 5.0 5.7 5.8 Risk free interest rate 1.8 % 2.5 % 2.1 % Volatility 23.1 % 21.5 % 22.9 % Dividend yield 3.0 % 3.0 % 3.0 % Expected volatility and the expected term were estimated by reference to the historical stock price performance of the Company and historical data for the Company's stock option awards, respectively. The risk-free interest rate was based on the yield on U.S. Treasury bonds with a remaining term approximately equal to the expected term of the stock option awards. Forfeitures were estimated at the date of grant. The following table summarizes stock option activity under the Omnibus Plan for the year ended December 31, 2019 : Number of Weighted-Average Options outstanding — December 31, 2018 451,081 $ 67.46 Add: Options granted 1,272 $ 66.59 Less: Options exercised 34,073 $ 35.26 Less: Options forfeited/cancelled 1,732 $ 71.89 Options outstanding — December 31, 2019 416,548 $ 70.08 The status of outstanding and exercisable stock options as of December 31, 2019 , summarized by exercise price follows: Options Vested or Expected to Vest Options Exercisable Exercise Price Number of Weighted- Weighted- Aggregate Number of Weighted- Aggregate $13.38 — $22.44 8,745 0.8 $ 18.72 $ 0.4 8,745 $ 18.72 $ 0.4 $24.09 — $42.82 56,380 3.3 $ 34.28 2.0 56,380 $ 34.28 2.0 $48.19 — $74.20 121,703 5.8 $ 58.45 1.5 120,347 $ 58.35 1.5 $74.70 — $93.35 229,720 7.5 $ 86.93 — 132,557 $ 85.35 — 416,548 6.3 $ 70.08 $ 3.9 318,029 $ 64.36 $ 3.9 _______________________ (a) Represents the total pre-tax intrinsic value as of December 31, 2019 that option holders would have received had they exercised their options as of such date. The pre-tax intrinsic value is based on the closing market price for the Company's common stock of $70.43 on December 31, 2019 . The aggregate pre-tax intrinsic value of stock options exercised for the years ended December 31, 2019 , 2018 and 2017 was $1.2 million , $5.2 million and $11.5 million , respectively. The following table summarizes the status of the Company's unvested stock options as of December 31, 2019 and activity for the year then ended: Number of Weighted-Average Outstanding — December 31, 2018 210,178 $ 14.21 Add: Options granted 1,272 $ 10.32 Less: Options vested 111,615 $ 14.04 Less: Options forfeited 1,316 $ 13.73 Outstanding — December 31, 2019 98,519 $ 14.41 As of December 31, 2019 , certain participants met age and service requirements that allowed their options to qualify for accelerated vesting upon retirement. As of December 31, 2019 , there were approximately 61,000 stock options subject to accelerated vesting that such participants would have been eligible to exercise if they had retired as of such date. The aggregate grant date fair value of options subject to accelerated vesting was $0.9 million . For the year ended December 31, 2019 , stock-based compensation expense for such options was less than $0.1 million . For the year ended December 31, 2019 , the aggregate grant date fair value of options vested, including options subject to accelerated vesting, was $1.6 million . Stock options that reflect accelerated vesting for expense recognition become exercisable according to the contract terms of the stock option grant. PSUs/RSUs For the year ended December 31, 2019 , the Company granted target awards of 49,730 PSUs. The measurement period for three fourths of the PSUs is January 1, 2019 through December 31, 2019, and for the remaining fourth of the PSUs is January 1, 2019 through December 31, 2021. The PSUs vest on December 31, 2021. Common Stock equal to not more than 200 percent of the PSUs target will be awarded based on the Company’s return on invested capital, consolidated revenue growth, EPS and total return to shareholders relative to the companies in the Russell 2000® Value small cap index. The Company’s return on invested capital, consolidated revenue growth and EPS are adjusted for certain items as further described in the Performance Share Unit Award Agreement. As of December 31, 2019 , the Company expects that Common Stock equal to approximately 67 percent of the PSU targets will be earned. The market price on the date of grant for the PSUs was $69.05 per share. At the end of the measurement period, the PSUs convert into RSUs, at the determined rate mentioned above, that are entitled to dividends but do not have voting rights. The Company is recognizing stock-based compensation expense pro-rata over the vesting term of the PSUs/RSUs. For further discussion on participating securities refer to Note 3, "Earnings Per Share". For the year ended December 31, 2019 , the Company awarded 10,056 RSUs to non-employee members of the Board of Directors and 36,457 RSUs to employees. The weighted-average grant date fair value of such awards was $67.04 per share and the awards vest one year from the date of grant for the Board of Directors grants and in equal amounts at December 31, 2019, 2020, and 2021 for the employee grants. During the vesting period, the holders of the RSUs are entitled to dividends, but the RSUs do not have voting rights and are forfeited in the event the holder is no longer an employee or member of the Board of Directors on the vesting date as further described in the Restricted Stock Unit Award Agreement. The following table summarizes the activity of the Company's unvested stock-based awards (other than stock options) for the years ended December 31, 2019 , 2018 and 2017 : RSUs Weighted-Average PSUs Weighted-Average Outstanding — December 31, 2016 80,719 $ 54.91 53,506 $ 73.79 Shares granted (a) 10,318 $ 76.84 41,883 $ 81.85 Shares vested (72,451 ) $ 55.26 — $ — Performance Shares vested 73,838 $ 52.11 (53,506 ) $ 73.79 Shares expired or cancelled (3,625 ) $ 50.48 (506 ) $ 81.85 Outstanding — December 31, 2017 88,799 $ 53.33 41,377 $ 81.85 Shares granted (a) 10,618 $ 82.29 40,747 $ 93.21 Shares vested (72,190 ) $ 60.24 — $ — Performance Shares vested 33,928 $ 88.40 (31,421 ) $ 81.85 Shares expired or cancelled (7,695 ) $ 84.45 (3,482 ) $ 84.45 Outstanding — December 31, 2018 53,460 $ 67.53 47,221 $ 93.21 Shares granted (a) 46,556 $ 67.04 49,730 $ 69.05 Shares vested (63,595 ) $ 72.91 — $ — Performance Shares vested 10,354 $ 93.21 (25,833 ) $ 93.21 Shares expired or cancelled (2,113 ) $ 69.35 (4,927 ) $ 85.67 Outstanding — December 31, 2019 (b) 44,662 $ 65.23 66,191 $ 75.62 _______________________ (a) For the years ended December 31, 2019 , 2018 and 2017 , includes 43 RSUs, 132 RSUs and 226 RSUs, respectively, that were granted in lieu of cash dividends. Such dividends-in-kind vest concurrently with the underlying RSUs. (b) The aggregate pre-tax intrinsic value of outstanding RSUs as of December 31, 2019 was $3.1 million . The aggregate pre-tax intrinsic value of restricted stock and RSUs that vested for the years ended December 31, 2019 , 2018 and 2017 was $4.2 million , $4.4 million and $6.3 million , respectively. Excess Tax Benefits Excess tax benefits represent the difference between the tax deduction the Company will receive on its tax return for compensation recognized by employees upon the vesting or exercise of stock-based awards and the tax benefit recognized for the grant date fair value of such awards. For the years ended December 31, 2019 , 2018 and 2017 , the Company recognized excess tax benefits related to the exercise or vesting of stock-based awards of $0.1 million , $1.2 million and $4.5 million , respectively.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2019
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders' Equity Common Stock The Company has authorized 100 million shares of Common Stock. Holders of the Company's Common Stock are entitled to one vote per share. In November 2019, the Company's Board of Directors authorized a program, effective January 1, 2020, that would allow the Company to repurchase up to $25 million of its outstanding Common Stock over the next 12 months (the "2020 Stock Purchase Plan"). Purchases by the Company under the 2020 Stock Purchase Plan would be made from time to time in the open market or in privately negotiated transactions in accordance with the requirements of applicable law. The timing and amount of any purchases will depend on share price, market conditions and other factors. The 2020 Stock Purchase Plan does not require the Company to purchase any specific number of shares and may be suspended or discontinued at any time. The 2020 Stock Purchase Plan is expected to be funded using cash on hand or borrowings under the Company's bank credit facility. The Company also had $25 million repurchase programs in place during the preceding two years that expired in December 2019 (the “2019 Stock Purchase Plan”) and December 2018 (the “2018 Stock Purchase Plan”), respectively. The following table shows shares purchased under the respective stock purchase plans: Year Ended December 31, 2019 2018 2017 Shares $ Shares $ Shares $ 2019 Stock Purchase Plan 79,676 $ 4.9 2018 Stock Purchase Plan 124,434 $ 9.3 2017 Stock Purchase Plan — — 2016 Stock Purchase Plan 85,354 $ 6.8 As of December 31, 2019 , under the terms of the Fourth Amended and Restated Credit Agreement and the 2021 Senior Notes, the Company has limitations on its ability to repurchase shares of its Common Stock, as further discussed in Note 7, "Debt." For the years ended December 31, 2019 , 2018 and 2017 , the Company acquired 17,774 shares, 25,890 shares and 28,000 shares of Common Stock, respectively, at a cost of $1.3 million , $1.5 million and $2.5 million , respectively, for shares surrendered by employees to pay taxes due on vested restricted stock awards and SARs exercised. Preferred Stock The Company has authorized 20 million shares of $0.01 par value preferred stock. The preferred stock may be issued in one or more series and with such designations and preferences for each series as shall be stated in the resolutions providing for the designation and issue of each such series adopted by the Board of Directors of the Company. The Board of Directors is authorized by the Company's articles of incorporation to determine the voting, dividend, redemption and liquidation preferences pertaining to each such series. No shares of preferred stock have been issued by the Company. Other Comprehensive Income (Loss) Comprehensive income (loss) includes, in addition to net income (loss), gains and losses recorded directly into stockholders' equity on the consolidated balance sheet. These gains and losses are referred to as other comprehensive income (loss) ("OCI") items. AOCI consists of foreign currency translation gains and (losses), adjustments related to pensions and other post-retirement benefits, and, prior to 2018, deferred gains and (losses) on "available-for-sale" securities. The Company does not provide income taxes for foreign currency translation adjustments related to indefinite investments in foreign subsidiaries. The components of accumulated other comprehensive income (loss), net of applicable income taxes are as follows: December 31, 2019 2018 Net loss from pension and other postretirement benefit liabilities, net of income tax benefits of $31.6 million and $29.9 million, respectively $ (94.3 ) $ (89.6 ) Unrealized foreign currency translation losses, net of income tax benefits of $0.3 and $0.3, respectively (19.0 ) (15.5 ) AOCI $ (113.3 ) $ (105.1 ) The following table presents changes in accumulated other comprehensive income (loss): Year Ended December 31, 2019 2018 2017 Pretax Tax Net Pretax Tax Net Pretax Tax Net Unrealized foreign currency translation gains (losses) $ (3.5 ) $ — $ (3.5 ) $ (7.9 ) $ (0.1 ) $ (8.0 ) $ 20.0 $ — $ 20.0 Adjustment to pension and other benefit liabilities (a) (6.4 ) 1.7 $ (4.7 ) (4.4 ) 1.1 (3.3 ) (13.8 ) 2.9 (10.9 ) Unrealized loss on "available-for-sale" securities (b) — — — — — — (0.4 ) 0.1 (0.3 ) Other comprehensive income (loss) $ (9.9 ) $ 1.7 $ (8.2 ) $ (12.3 ) $ 1.0 $ (11.3 ) $ 5.8 $ 3.0 $ 8.8 _______________________ (a) In conjunction with the Tax Act, the Company early adopted in the fourth quarter of 2017 ASU 2018-02, Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income (Topic 740) and accordingly reclassified $10.9 million from AOCI to retained earnings to address the stranded tax effects resulting from the effect of lower tax rates in the Tax Act on items with AOCI. (b) The Company adopted ASU 2016-01, Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities as of January 1, 2018. As a result of the adoption, the Company reclassified $0.3 million of unrealized losses (net of $0.1 million income tax effect) on "available-for-sale" securities to beginning retained earnings. For the years ended December 31, 2019 , 2018 and 2017 , the Company reclassified $6.0 million , $6.0 million and $5.9 million , respectively, of costs from AOCI to Other expense, net on the consolidated statements of operations. For the years ended December 31, 2019 , 2018 and 2017 , the Company recognized an income tax benefit of $1.5 million , $1.5 million and $2.3 million , respectively, related to such reclassifications classified as Provision for income taxes on the consolidated statements of operations. For the year ended December 31, 2019 , 2018, and 2017, the Company reclassified costs of $1.3 million , $0.8 million , and $0.6 million , respectively, from AOCI to the pension and SERP plan related adjustments on the Consolidated Statements of Operations. For the years ended December 31, 2019 , 2018, and 2017, the Company recognized an income tax benefit of $0.3 million , $0.2 million , and $0.2 million , respectively, related to such reclassifications classified as provision for income taxes on the Consolidated Statements of Operations.

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases	Leases Effective January 1, 2019, the Company adopted ASU 2016-02, Leases (Topic 842) using the modified retrospective transition option. The Company also elected the package of transition provisions available for expired or existing contracts, which allowed us to carry forward our historical assessments of (1) whether contracts are or contain leases, (2) lease classification and (3) initial direct costs. The most significant impact was recognition of right-of-use ("ROU") assets of $16 million and lease liabilities of $17 million on the Condensed Consolidated Balance Sheet as of January 1, 2019. The adoption of this standard did not have a significant effect related to existing leases and, as a result, no cumulative-effect adjustment was needed. The Company also completed the implementation of new processes to assist in the ongoing lease data collection and analysis, and updated its accounting policies and internal controls in connection with the adoption of the new standard. The Company has operating leases for corporate offices, warehouses and certain equipment, with remaining lease terms of up to 11 years , some of which include options to extend the leases for up to five years . The Company determines if an arrangement is a lease at inception. Operating leases with terms greater than 12 months are included in "Lease Right-of-Use Assets", "Lease liabilities payable within one year" and "Noncurrent Lease Liabilities" on the Condensed Consolidated Balance Sheets. As of December 31, 2019 , the Company did not have any material finance leases. Operating lease ROU assets and lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of the Company’s 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 future payments. 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 minimum lease payments is recognized on a straight-line basis over the lease term. The Company’s lease agreements contain lease and non-lease components, which are accounted for as a single lease component. Additionally, for certain equipment leases, the Company applies a portfolio approach to effectively account for the operating lease ROU assets and liabilities. The components of lease expense were as follows: Year Ended December 31, 2019 Operating lease cost $ 3.1 Short-term lease cost 1.5 Variable lease cost (a) 2.1 _______________________ (a) The variable lease costs consist mainly of a warehouse lease where the cost is determined based on the square footage used each month. For the year ended December 31, 2019 , the Company paid $3.1 million for amounts included in the measurement of operating lease liabilities. For the year ended December 31, 2019 , new ROU assets of $0.4 million were obtained in exchange for operating lease liabilities. As of December 31, 2019 , the weighted average remaining lease term and weighted average discount rate for operating leases were 8.1 years and 4.9% , respectively. Maturities of lease liabilities were as follows: Year Ending December 31, Operating Leases 2020 $ 2.8 2021 2.6 2022 2.3 2023 2.0 2024 1.7 Thereafter 7.4 Total lease payments 18.8 Less: Imputed interest 3.9 Total lease liabilities $ 14.9 Under the previous accounting standard, ASC Topic 840, Leases , which was effective through December 31, 2018, the rent expense under operating leases for the years ended December 31, 2018 and 2017 rent was $7.2 million and $6.8 million , respectively.

Commitments, Contingencies, and

Commitments, Contingencies, and Legal Matters	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies, and Legal Matters	Commitments, Contingencies, and Legal Matters Litigation The Company is involved in certain legal actions and claims arising in the ordinary course of business. While the outcome of these legal actions and claims cannot be predicted with certainty, it is the opinion of management that the outcome of any such claim which is pending or threatened, either individually or on a combined basis, will not have a material effect on the consolidated financial condition, results of operations or liquidity of the Company. Income Taxes The Company periodically undergoes examination by the Internal Revenue Service (the "IRS") as well as various state and foreign jurisdictions. These tax authorities routinely challenge certain deductions and credits reported by the Company on its income tax returns. No significant tax audit findings are being contested at this time with either the IRS or any state or foreign tax authority. Environmental, Health and Safety Matters The Company is subject to federal, state and local laws, regulations and ordinances relating to various environmental, health and safety matters. The Company is in compliance with, or is taking actions designed to ensure compliance with, these laws, regulations and ordinances. However, the nature of the Company's business exposes it to the risk of claims with respect to environmental, health and safety matters, and there can be no assurance that material costs or liabilities will not be incurred in connection with such claims. Except for certain orders issued by environmental, health and safety regulatory agencies, with which management believes the Company is in compliance and which management believes are immaterial to the results of operations of the Company's business, Neenah is not currently named as a party in any judicial or administrative proceeding relating to environmental, health and safety matters. While the Company has incurred in the past several years, and will continue to incur, capital and operating expenditures in order to comply with environmental, health and safety laws, regulations and ordinances, management believes that the Company's future cost of compliance with environmental, health and safety laws, regulations and ordinances, and its exposure to liability for environmental, health and safety claims will not have a material effect on its financial condition, results of operations or liquidity. However, future events, such as changes in existing laws and regulations or contamination of sites owned, operated or used for waste disposal by the Company (including currently unknown contamination and contamination caused by prior owners and operators of such sites or other waste generators) may give rise to additional costs which could have a material effect on the Company's financial condition, results of operations or liquidity. The Company incurs capital expenditures necessary to meet legal requirements and otherwise relating to the protection of the environment at its facilities in the United States and internationally. The Company's anticipated capital expenditures for environmental projects are not expected to have a material effect on the Company's financial condition, results of operations or liquidity. Employees and Labor Relations As of December 31, 2019 , the Company had approximately 2,324 regular full-time employees of whom 995 hourly and 513 salaried employees were located in the United States and 385 hourly and 431 salaried employees were located in Europe. All of the Company's U.S. hourly union employees are represented by the USW. Certain employees of Neenah Germany are eligible to be represented by the Mining, Chemicals and Energy Trade Union, Industriegewerkschaft Bergbau, Chemie and Energie (the "IG BCE"). Under German law union membership is voluntary and does not need to be disclosed to the Company. As a result, the number of employees covered by the collective bargaining agreement with the IG BCE cannot be determined. In Netherlands, most of our employees are eligible to be represented by the Christelijke Nationale Vakbond ("CNV") and the Federatie Nederlandse Vakvereniging ("FNV"). Under Netherlands law, union membership is voluntary and does not need to be disclosed to the Company. The collective bargaining arrangement with CNV and FNV will expire in April 2020. Hourly union employees at the Company's Bolton, England manufacturing facility are represented by Unite the Union ("UNITE"). As of December 31, 2019 , no employees are covered under collective bargaining agreements that will expire in the next 12 months, not including the employees covered by the collective bargaining arrangements with the IG BCE and CNV and FNV. The following table shows the status of the Company's bargaining agreements as of December 31, 2019 . Contract Expiration Date Location Union Number of Employees April 2020 Eerbeek, Netherlands CNV, FNV (a) August 2020 Weidach and Bruckmühl, Germany IG BCE (a) January 2021 Whiting, WI USW 203 June 2021 Neenah, WI USW 244 July 2021 Munising, MI USW 177 November 2021 Lowville, NY USW 98 May 2022 Appleton, WI USW 89 _______________________ (a) Under Germany and Netherlands laws, union membership is voluntary and does not need to be disclosed to the Company. As a result, the number of employees covered by the collective bargaining agreement with the IG BCE, and the CNV and FNV cannot be determined. Purchase Commitments The Company has certain minimum purchase commitments that extend beyond December 31, 2019 . Commitments under these contracts are approximately $7.2 million , $0.8 million , $0.2 million , and $0.2 million for the years ended December 31, 2020 , 2021, 2022, and 2023 respectively. Such purchase commitments for the year ended December 31, 2020 are primarily for raw material contracts. Although the Company is primarily liable for payments on the above-mentioned leases and purchase commitments, management believes exposure to losses, if any, under these arrangements is not material.

Sale of Battleboro Mill and Imp

Sale of Battleboro Mill and Impairment Loss (Notes)	12 Months Ended
	Dec. 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
Sale of Battleboro Mill and Impairment Loss	Sale of Brattleboro Mill and Impairment Loss In the second quarter of 2018, as a result of a broad scope review of various initiatives to improve margins and optimize the portfolio of products and manufacturing footprint in the Fine Paper and Packaging segment, the Company determined that the Brattleboro mill was not a strategic part of the Fine Paper and Packaging manufacturing footprint, given the nature of the office supply category. Historically, the Brattleboro mill had manufactured products primarily for the office supply category, and more recently had been adversely impacted by manufacturing inefficiencies due to changes in input costs, product category and grade complexity. Following the review, the Company initiated a process to sell the Brattleboro mill, its business operations and associated research and office facilities ("disposal group"). The disposal transaction did not constitute a strategic shift in the business that would have a major effect on operations of the Company . Upon classifying the disposal group as assets held for sale, the Company tested the individual assets of the disposal group for impairment. The disposal group was measured at fair value (a Level 3 measurement, using unobservable estimates), less costs to sell. On December 31, 2018, the Company completed the sale of the Brattleboro mill to Long Falls Paperboard, LLC for a purchase price of $5.0 million . In conjunction with the sale, the Company recorded an impairment loss of $31.1 million , of which $24.4 million , $1.1 million and $5.6 million was reported within the Fine Paper and Packaging, Technical Products and Other business segments, respectively.

Business Segment and Geographic

Business Segment and Geographic Information	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Business Segment and Geographic Information	Business Segment and Geographic Information The Company's reportable operating segments consist of Technical Products, Fine Paper and Packaging and, in the prior year periods only, Other. The Technical Products segment is an aggregation of the Company's filtration and performance materials businesses which are similar in terms of economic characteristics, nature of products, processes, customer class and product distribution methods. The technical products business is an international producer of fiber-formed, coated and/or saturated specialized media that delivers high performance benefits to customers. Included in this segment are filtration media for transportation, water and other end use applications ("Filtration"), and tape and abrasives backings products ("Backings") and digital image transfer, durable label and other specialty substrate products ("Specialty"). The following table presents sales by product category for the technical products business: Year Ended December 31, 2019 2018 2017 Filtration 42 % 40 % 42 % Backings 24 % 28 % 31 % Specialty 34 % 32 % 27 % Total 100 % 100 % 100 % Following the disposition of the Brattleboro mill which eliminated a significant portion of the products of the Other business segment, in January 2019 the Company realigned the remaining products manufactured in the Other business segment to be managed as part of the Technical Products business segment. As a result, the Company recast the comparable 2018 and 2017 information and presented the $15.6 million and $16.5 million of net sales for the year ended December 31, 2018 and 2017, respectively, of this remaining portion of the Other business segment within the Technical Products business segment. The 2018 and 2017 operating income (loss) of the Other business segment was immaterial and was not recast. The Company also recast the total assets by segment and presented the $12.9 million of total assets as of December 31, 2018 of this remaining portion of the Other business segment within the Technical Products business segment. The Company also recast the 2018 and 2017 depreciation and amortization and capital expenditures by segment and presented $0.7 million and $0.9 million of depreciation and amortization, respectively, and $0.0 million and $1.1 million of capital expenditures, respectively, of this remaining portion of the Other business segment within the Technical Products business segment. The Company presented the net sales for the years ended December 31, 2018 and 2017 of the remaining portion of the Other business segment into Specialty products category in the table above. The fine paper and packaging business is a leading supplier of premium printing and other high-end specialty papers ("Graphic Imaging"), premium packaging ("Packaging") and specialty office papers ("Filing/Office") primarily in North America. The following table presents sales by product category for the fine paper and packaging business: Year Ended December 31, 2019 2018 2017 Graphic Imaging 79 % 78 % 80 % Packaging 21 % 18 % 16 % Filing/Office — % 4 % 4 % Total 100 % 100 % 100 % Each segment employs different technologies and marketing strategies. Disclosure of segment information is on the same basis that management uses internally for evaluating segment performance and allocating resources. Transactions between segments are eliminated in consolidation. The costs of shared services, and other administrative functions managed on a common basis, are allocated to the segments based on usage, where possible, or other factors based on the nature of the activity. General corporate expenses that do not directly support the operations of the business segments are shown as Unallocated corporate costs. The accounting policies of the reportable operating segments are the same as those described in Note 2, "Summary of Significant Accounting Policies." Business Segments Year Ended December 31, 2019 2018 2017 Net sales Technical Products $ 541.6 $ 583.2 $ 518.6 Fine Paper and Packaging 396.9 445.8 455.3 Other — 5.9 6.0 Consolidated $ 938.5 $ 1,034.9 $ 979.9 Year Ended December 31, 2019 2018 2017 Operating income (loss) Technical Products (a) $ 44.6 $ 50.9 $ 55.3 Fine Paper and Packaging (b) 53.2 29.4 69.5 Other (c) — (6.4 ) (0.4 ) Unallocated corporate costs (d) (19.5 ) (19.8 ) (20.1 ) Consolidated $ 78.3 $ 54.1 $ 104.3 _______________________ (a) Operating income for the year ended December 31, 2019 included restructuring and other non-routine costs of $ 0.3 million and a curtailment gain of $1.6 million related to the Neenah Coldenhove pension plan. Operating income for the year ended December 31, 2018 included non-cash impairment loss, restructuring and integration costs, and pension settlement charges of $2.5 million , offset by favorable acquisition adjustments of $3.9 million . (b) Operating income for the year ended December 31, 2019 included $5.7 million of non-routine costs, primarily related to idled paper machine costs due to the consolidation of the fine paper manufacturing footprint. Operating income for the year ended December 31, 2018 included non-cash impairment loss, restructuring costs, and pension settlement charges of $24.6 million , offset by favorable insurance settlement of $0.3 million . Operating income for the year ended December 31, 2017 included a favorable insurance settlement of $2.9 million . Operating income for the year ended December 31, 2016 included integration costs of $1.8 million . (c) Operating income for the year ended December 31, 2018 included non-cash impairment loss, restructuring costs, and a pension settlement charge of $6.0 million , offset by favorable insurance settlement of $0.1 million . Operating income for the year ended December 31, 2017 included a favorable insurance settlement of $0.3 million . Operating income for the years ended December 31, 2016 included integration costs of $1.1 million . (d) Unallocated corporate costs for the year ended December 31, 2019 included costs of $0.3 million, consisting of restructuring and other non-routine costs and a SERP settlement charge. Unallocated corporate costs for the year ended December 31, 2018 included restructuring costs and pension settlement charge of $1.9 million . Unallocated corporate costs for the year ended December 31, 2017 included acquisition and integration costs of $1.3 million and $0.6 million from pension plan and SERP settlement costs. December 31, 2016 included $2.7 million of pre-operating costs related to conversion of a fine paper machine to filtration and $0.8 million for a pension plan settlement charge. Year Ended December 31, 2019 2018 2017 Depreciation and amortization Technical Products $ 24.1 $ 24.4 $ 20.3 Fine Paper and Packaging 13.2 9.9 11.0 Other — 0.2 0.3 Corporate 1.6 1.6 1.7 Consolidated $ 38.9 $ 36.1 $ 33.3 Year Ended December 31, 2019 2018 2017 Capital expenditures Technical Products $ 13.1 $ 28.0 $ 29.7 Fine Paper and Packaging 7.7 8.7 12.5 Corporate 0.6 1.4 0.5 Consolidated $ 21.4 $ 38.1 $ 42.7 December 31, 2019 2018 Total Assets (a) Technical Products $ 573.8 $ 599.3 Fine Paper and Packaging 217.7 234.7 Corporate and other (b) 36.3 27.2 Total $ 827.8 $ 861.2 _______________________ (a) Segment identifiable assets are those that are directly used in the segments operations. (b) Corporate assets are primarily deferred income taxes and lease ROU assets. Geographic Information Year Ended December 31, 2019 2018 2017 Net sales United States $ 673.0 $ 744.4 $ 748.9 Germany 196.3 216.5 210.3 Rest of Europe 69.2 74.0 20.7 Consolidated $ 938.5 $ 1,034.9 $ 979.9 Net sales are attributed to geographic areas based on the physical location of the selling entities. December 31, 2019 2018 Long-Lived Assets United States $ 364.2 $ 366.3 Germany 153.3 157.9 Rest of Europe 57.6 59.1 Total $ 575.1 $ 583.3 Long-lived assets consist of property and equipment, deferred income taxes, goodwill, intangibles and other assets. Concentrations For the year ended December 31, 2019, sales to the technical products business' largest customer represented approximately 8 percent of consolidated net sales, and approximately 14 percent of net sales for the technical products segment. For the years ended December 31, 2018, and 2017, there were no customers sales to which constituted over 10 percent of segment net sales for technical products. For the year ended December 31, 2019, sales to the largest customer of fine paper and packaging business represented approximately 8 percent of consolidated net sales, and approximately 18 percent of net sales of the fine paper and packaging business. For the year ended December 31, 2018, sales to the two largest customers of fine paper and packaging business represented approximately 7 percent and 5 percent , respectively, of consolidated net sales and approximately 16 percent and 12 percent , respectively, of net sales of the fine paper and packaging business. For the year ended December 31, 2017 sales to the two largest customers of fine paper and packaging business each represented approximately 7 percent of consolidated net sales and approximately 15 percent of net sales of the fine paper and packaging business. Except for certain specialty latex grades and specialty softwood pulp used by Technical Products, management is not aware of any significant concentration of business transacted with a particular supplier that could, if suddenly eliminated, have a material effect on its operations.

Supplemental Data

Supplemental Data	12 Months Ended
	Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]
Supplemental Data	Supplemental Data Supplemental Statement of Operations Data Summary of Advertising and Research and Development Expenses Year Ended December 31, 2019 2018 2017 Advertising expense (a) $ 4.9 $ 4.7 $ 6.0 Research and development expense 8.7 9.2 8.9 _______________________ (a) Advertising expense and research and development expense are recorded in Selling, general and administrative expenses on the consolidated statements of operations. Supplemental Balance Sheet Data Summary of Accounts Receivable, net December 31, 2019 2018 From customers $ 104.1 $ 116.1 Less allowance for doubtful accounts and sales discounts (1.5 ) (1.3 ) Total $ 102.6 $ 114.8 Summary of Inventories December 31, 2019 2018 Inventories by Major Class: Raw materials $ 32.8 $ 35.6 Work in progress 26.4 30.1 Finished goods 67.3 78.3 Supplies and other 5.2 3.0 131.7 147.0 Excess of FIFO over LIFO cost (8.9 ) (15.4 ) Total $ 122.8 $ 131.6 The first-in, first-out ("FIFO") value of inventories valued on the LIFO method was $102.2 million and $109.1 million at December 31, 2019 and 2018 , respectively. For the year ended December 31, 2019 and 2018 , income from continuing operations before income taxes was reduced by less than $0.1 million and $0.6 million , respectively, due to a decrease in certain LIFO inventory quantities. Summary of Prepaid and Other Current Assets December 31, 2019 2018 Prepaid and other current assets $ 9.9 $ 12.2 Spare parts 6.4 6.6 Receivable for income taxes 2.0 2.8 Total $ 18.3 $ 21.6 Summary of Property, Plant and Equipment, net December 31, 2019 2018 Land and land improvements $ 19.4 $ 19.0 Buildings 165.4 156.0 Machinery and equipment 651.0 650.3 Construction in progress 14.8 14.9 850.6 840.2 Less accumulated depreciation 470.0 444.0 Net Property, Plant and Equipment $ 380.6 $ 396.2 Depreciation expense for the years ended December 31, 2019 , 2018 and 2017 was $33.9 million , $32.6 million and $28.3 million , respectively. Interest expense capitalized as part of the costs of capital projects was $0.2 million , $0.2 million and $0.0 million , respectively, for the years ended December 31, 2019 , 2018 and 2017 . Summary of Accrued Expenses December 31, 2019 2018 Accrued salaries and employee benefits $ 26.2 $ 23.9 Amounts due to customers 8.9 9.6 Accrued income taxes 0.5 5.3 Accrued utilities 3.0 3.9 Accrued interest 1.2 1.2 Other 7.2 11.3 Total $ 47.0 $ 55.2 Summary of Noncurrent Employee Benefits December 31, 2019 2018 Pension benefits $ 57.1 $ 54.0 Post-employment benefits other than pensions (a) 36.0 38.9 Total $ 93.1 $ 92.9 _______________________ (a) Post-employment benefits other than pensions included $1.7 million of SRCP benefits, $0.7 million of Canadian long-term disability benefits, and $0.2 million of other long-term benefits as of December 31, 2019. As of December 31, 2018, $1.7 million of SRCP benefits and $0.8 million of Canadian long-term disability benefits were included. Supplemental Cash Flow Data Supplemental Disclosure of Cash Flow Information Year Ended December 31, 2019 2018 2017 Cash paid during the year for interest, net of interest expense capitalized $ 10.9 $ 11.9 $ 11.3 Cash paid during the year for income taxes, net of refunds 13.3 7.6 7.6 Non-cash investing activities: Liability for equipment acquired 3.2 3.4 5.4 Net Cash Provided by (Used in) Changes in Operating Working Capital, Net of Effect of Acquisitions Year Ended December 31, 2019 2018 2017 Accounts receivable $ 11.6 $ (0.9 ) $ (10.2 ) Inventories 8.2 3.8 (11.7 ) Income taxes receivable/payable (5.4 ) (1.8 ) 4.5 Prepaid and other current assets 2.4 (1.8 ) (0.4 ) Accounts payable (14.0 ) 0.3 10.6 Accrued expenses (3.4 ) (0.6 ) (4.2 ) Other — — (0.4 ) Total $ (0.6 ) $ (1.0 ) $ (11.8 )

Unaudited Quarterly Data

Unaudited Quarterly Data	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Unaudited Quarterly Data	Unaudited Quarterly Data 2019 Quarters First Second (a) Third (b) Fourth (c) Year Net Sales $ 239.7 $ 253.4 $ 231.8 $ 213.6 $ 938.5 Gross Profit 43.7 50.7 44.7 44.3 183.4 Operating Income (Loss) 17.4 19.8 19.0 22.1 78.3 Income (Loss) From Continuing Operations 11.8 13.6 14.4 15.6 55.4 Earnings (Loss) Per Common Share From Continuing Operations: Basic $ 0.70 $ 0.80 $ 0.85 $ 0.92 $ 3.27 Diluted $ 0.69 $ 0.80 $ 0.84 $ 0.92 $ 3.26 _______________________ (a) Operating income includes idled paper machine costs of $2.0 million , indirect tax audit costs for 2012-15 of $0.6 million , and restructuring and other non-routine costs of $0.9 million . (b) Operating income includes idled paper machine costs of $2.4 million , indirect tax audit costs for 2012-15 of $0.1 million , a favorable adjustment to restructuring and other non-routine costs of $0.2 million , and a SERP settlement charge of $0.1 million . (c) Operating income includes idled paper machine costs of $0.3 million , a pension plan curtailment gain of $1.6 million , and a pension plan curtailment charge of $0.1 million . 2018 Quarters First (d) Second (e) Third (f) Fourth (g) Year Net Sales $ 266.5 $ 271.3 $ 256.2 $ 240.9 $ 1,034.9 Gross Profit 52.4 55.1 41.3 34.6 183.4 Operating Income 24.1 (4.3 ) 16.5 17.8 54.1 Income From Continuing Operations 16.2 (4.8 ) 12.9 12.9 37.2 Earnings Per Common Share From Continuing Operations: Basic $ 0.96 $ (0.29 ) $ 0.76 $ 0.77 $ 2.20 Diluted $ 0.95 $ (0.29 ) $ 0.75 $ 0.76 $ 2.17 _______________________ (d) Income from continuing operations includes an unfavorable prior year tax adjustment of $0.9 million related to one-time taxes on foreign earnings under the Tax Act and an after-tax SERP settlement charge of $0.6 million . (e) Operating loss includes an impairment loss of $32.0 million , pension settlement charges of $1.0 million and integration and restructuring charges of $0.3 million . (f) Operating income includes a favorable acquisition-related adjustment of $3.1 million , a favorable insurance settlement of $0.4 million , and unfavorable adjustments to the impairment loss of $2.0 million and $2.2 million of integration and restructuring charges. (g) Operating income includes favorable adjustments to the impairment loss of $2.9 million and $0.4 million to integration and restructuring costs and a favorable acquisition-related adjustment of $0.8 million . Income from continuing operations includes a favorable tax adjustment related to a Netherlands tax rate change of $0.7 million .

SCHEDULE II SCHEDULE OF VALUATI

SCHEDULE II SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SCHEDULE II SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS	SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS (Dollars in millions) Description Balance at Beginning of Period Charged to Costs and Expenses Charged to Other Accounts Write-offs and Reclassifications Balance at End of Period December 31, 2019 Allowances deducted from assets to which they apply Allowance for doubtful accounts $ 0.8 $ 0.5 $ — $ (0.3 ) $ 1.0 Allowance for sales discounts 0.5 — (0.1 ) — 0.4 Valuation allowance – deferred income taxes 2.7 — 3.1 — 5.8 December 31, 2018 Allowances deducted from assets to which they apply Allowance for doubtful accounts $ 0.8 $ 0.1 $ — $ (0.1 ) $ 0.8 Allowance for sales discounts 0.5 — — — 0.5 Valuation allowance – deferred income taxes 0.4 0.1 2.2 — 2.7 December 31, 2017 Allowances deducted from assets to which they apply Allowance for doubtful accounts $ 1.0 $ 0.2 $ — $ (0.4 ) $ 0.8 Allowance for sales discounts 0.5 — — — 0.5 Valuation allowance – deferred income taxes 3.5 — — (3.1 ) 0.4

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements include the financial statements of the Company and its wholly owned and majority owned subsidiaries. All inter-company balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of net sales and expenses during the reporting periods. Actual results could differ from these estimates, and changes in these estimates are recorded when known. Significant management judgment is required in determining the accounting for, among other things, reserves for uncertain tax positions, pension and postretirement benefit obligations, retained insurable risks, reserves for sales discounts and allowances, purchase price allocations, useful lives for depreciation and amortization, asset retirement obligations ("AROs"), future cash flows associated with impairment testing for tangible and intangible long-lived assets, goodwill, income taxes, contingencies, inventory obsolescence and market reserves and the valuation of stock-based compensation.
Revenue Recognition	Revenue Recognition The Company recognizes sales revenue at a point in time following the transfer of control of the product to the customer, which typically occurs upon shipment or delivery depending on the terms of the underlying contractual arrangements. Sales are reported net of allowable discounts and estimated returns. Reserves for cash discounts, trade allowances and sales returns are estimated using historical experience. The Company accounts for shipping and handling activities related to contracts with customers as costs to fulfill our promise to transfer the associated products. Accordingly, the Company records customer payments of shipping and handling costs as a component of net sales and classifies such costs as a component of cost of sales. The Company excludes tax amounts assessed by governmental authorities that are both (i) imposed on and concurrent with a specific revenue-producing transaction and (ii) collected from customers from our measurement of transaction prices. Accordingly, such tax amounts are not included as a component of net sales or cost of sales. The Company considers each transaction/shipment as a separate performance obligation. Neenah recognizes revenue when the title transfers to the customer. As such, the remaining performance obligations at period end are not considered significant. Sales terms in the technical products business vary depending on the type of product sold and customer category. In general, sales are collected in approximately 45 to 55 days . Extended credit terms of up to 120 days are offered to customers located in certain international markets. Fine paper and packaging sales terms range between 20 and 30 days with discounts of 0 to 2 percent for early customer payments, with discounts of one percent and 20 -day terms used most often. Extended credit terms are offered to customers located in certain international markets. Refer to Note 14, "Business Segment and Geographic Information", for further disaggregation of revenue.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include all cash balances and highly liquid investments with an initial maturity of three months or less. The Company places its temporary cash investments with high credit quality financial institutions. As of December 31, 2019 and 2018 , $0.1 million and $0.1 million , respectively, of the Company's cash and cash equivalents is restricted to the payment of postretirement benefits for certain former Fox River executives.
Inventories	Inventories U.S. inventories are valued at the lower of cost, using the last-in, first-out ("LIFO") method for financial reporting purposes, or market. European inventories are valued at the lower of cost, using a weighted-average cost method, or net realizable value. Cost includes labor, materials and production overhead.
Foreign Currency	Foreign Currency Balance sheet accounts of the Company's operations in Germany and the Netherlands, the United Kingdom (the "U.K."), and Canada are translated from Euros, British Pounds, and Canadian dollars, respectively, into U.S. dollars at period-end exchange rates, and income and expense accounts are translated at average exchange rates during the period. Translation gains or losses related to net assets located in Germany, the Netherlands, the U.K., and Canada are recorded as unrealized foreign currency translation adjustments within accumulated other comprehensive income (loss) ("AOCI") in stockholders' equity. Gains and losses resulting from foreign currency transactions (transactions denominated in a currency other than the entity's functional currency) are included in Other expense, net in the consolidated statements of operations.
Property and Depreciation	Property and Depreciation Property, plant and equipment are stated at cost, less accumulated depreciation. Certain costs of software developed or obtained for internal use are capitalized. When property, plant and equipment is sold or retired, the costs and the related accumulated depreciation are removed from the accounts, and the gains or losses are recorded in Other (income) expense, net. For financial reporting purposes, depreciation is principally computed on the straight-line method over estimated useful asset lives. The weighted average remaining useful lives for buildings, land improvements and machinery and equipment are approximately 19 years , 19 years and 10 years , respectively. The units-of-production method of depreciation is used for the U.S. transportation filtration production assets with a gross book value of $69.3 million , which reflects the nature of the assets' utilization. For income tax purposes, accelerated methods of depreciation are used. The costs of major rebuilds and replacements of plant and equipment are capitalized, and the cost of maintenance performed on manufacturing facilities, composed of labor, materials and other incremental costs, is expensed as incurred. Start-up costs for new or expanded facilities, including costs related to trial production, are expensed as incurred. The Company accounts for AROs in accordance with Accounting Standards Codification ("ASC") Topic 410, Asset Retirements and Environmental Obligations , which requires companies to make estimates regarding future events in order to record a liability for AROs in the period in which a legal obligation is created. Such liabilities are recorded at fair value, with an offsetting increase to the carrying value of the related long-lived asset. As of December 31, 2019 , the Company is unable to estimate its AROs for environmental liabilities at its manufacturing facilities.
Stock-Based Compensation	Stock-Based Compensation The Company accounts for stock-based compensation in accordance with the fair value recognition provisions of ASC Topic 718, Compensation — Stock Compensation ("ASC Topic 718"). The amount of stock-based compensation cost recognized is based on the fair value of grants that are ultimately expected to vest and is recognized pro-rata over the requisite service period for the entire award.
Research and Development Expense	Research and Development Expense Research and development costs are charged to expense as incurred and are recorded in "Selling, general and administrative expenses" on the consolidated statement of operations. See Note 15, "Supplemental Data — Supplemental Statement of Operations Data."
Fair Value Measurements and Fair Value of Pension Plan Assets	Fair Value Measurements The Company measures fair value in accordance with ASC Topic 820, Fair Value Measurements and Disclosures ("ASC Topic 820") which establishes a framework for measuring fair value. ASC Topic 820 provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Fair Value of Pension Plan Assets
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying amounts reflected in the consolidated balance sheets for cash and cash equivalents, accounts receivable and accounts payable approximate fair value due to their short maturities. The fair value of short and long-term debt is estimated using rates currently available to the Company for debt of the same remaining maturities. The following table presents the carrying value and the fair value of the Company's debt. 12/31/2019 12/31/2018 Carrying Fair Carrying Fair 2021 Senior Notes (5.25% fixed rate) $ 175.0 $ 174.3 $ 175.0 $ 170.5 Global Revolving Credit Facilities (variable rates) 21.6 21.6 57.9 57.9 Second German Loan Agreement (2.5% fixed rate) 3.5 3.6 4.8 5.1 Third German Loan Agreement (1.45% fixed rate) 3.7 3.7 4.9 4.9 Total debt $ 203.8 $ 203.2 $ 242.6 $ 238.4 _______________________ (a) Fair value for all debt instruments was estimated from Level 2 measurements. The Company's investments in marketable securities are accounted for as "available-for-sale securities" in accordance with ASC Topic 320, Investments — Debt and Equity Securities ("ASC Topic 320"). Pursuant to ASC Topic 320, marketable securities are reported at fair value on the consolidated balance sheet and holding gains and losses are reported in "Other Income (Expense), net" on the Company's consolidated statements of operations. At December 31, 2019 , the Company had $4.0 million in marketable securities classified as Other assets on the consolidated balance sheet. The cost of such marketable securities was $4.4 million . Fair value for the Company's marketable securities was estimated from Level 1 inputs. The Company's marketable securities are designated for the payment of benefits under its supplemental employee retirement plan ("SERP").
Accounting Standards Changes	Accounting Standards Changes In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) ("ASU 2016-02"). ASU 2016-02 requires lessees to put most leases on their balance sheets but recognize expenses on their income statements in a manner similar to current lease accounting. The amendments in this ASU are effective January 1, 2019. In July 2018, the FASB issued ASU 2018-11, Leases - Targeted Improvements, to allow a company to elect an optional modified retrospective transition method that applies the new lease requirements through a cumulative-effect adjustment in the period of adoption. Effective January 1, 2019, the Company adopted the new lease accounting standard using the modified retrospective transition option of applying the new standard at the adoption date. The Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification. The most significant change was related to the recognition of $16 million of right-of-use assets and corresponding lease liabilities of $17 million on its consolidated balance sheet as of January 1, 2019. The adoption of this standard did not have a material impact related to existing leases and as a result, a cumulative-effect adjustment was not recorded. See Note 11, "Leases." In March 2017, the FASB issued ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (Topic 715) . ASU 2017-07 requires entities to (1) disaggregate the current service-cost component from the other components of net benefit cost (the "other components") and present it with other current compensation costs for related employees in the income statement and (2) present the other components elsewhere in the income statement and outside of income from operations if such a subtotal is presented. In addition, only the service-cost component of net benefit cost is eligible for capitalization in inventories. The Company adopted this ASU as of January 1, 2018. As a result of the adoption, the Company reclassified $1.5 million and $1.2 million of net cost for the year ended December 31, 2017, of other components of net benefit cost from "Cost of products sold" and "Selling, general and administrative expenses" to "Other Expense - net" on the consolidated statements of operations. There was no other material impact on its consolidated financial statements due to the adoption. As of December 31, 2019 , no other amendments to the ASC had been issued and not adopted by the Company that will have or are reasonably likely to have a material effect on the its financial position, results of operations or cash flows.
Earnings per Share	The Company's restricted stock units ("RSUs") are paid non-forfeitable common stock dividends and thus meet the criteria of participating securities. Accordingly, basic EPS has been calculated using the two-class method, under which earnings are allocated to both common stock and participating securities. Basic EPS has been computed by dividing net income allocated to common stock by the weighted average common shares outstanding. For the computation of basic EPS, weighted average RSUs outstanding are excluded from the calculation of weighted average shares outstanding. ASC Topic 260, Earnings per Share ("ASC Topic 260") requires companies with participating securities to calculate diluted earnings per share using the "two class" method. The "two class" method requires first calculating diluted earnings per share using a denominator that includes the weighted average share equivalents from the assumed conversion of dilutive securities. Diluted earnings per share is then calculated using net income reduced by the amount of distributed and undistributed earnings allocated to participating securities calculated using the "Treasury Stock" method and a denominator that includes the weighted average share equivalents from the assumed conversion of dilutive securities excluding participating securities. Companies are required to report the lower of the diluted earnings per share amounts under the two calculations subject to the anti-dilution provisions of ASC Topic 260. Diluted EPS has been computed by dividing net income allocated to common stock by the weighted average number of common shares used in computing basic EPS, further adjusted to include the dilutive impact of the exercise or conversion of common stock equivalents, such as stock options, stock appreciation rights ("SARs") and target awards of RSUs with performance conditions ("Performance Share Units" or "PSUs"), into shares of common stock as if those securities were exercised or converted. For the years ended December 31, 2019 , 2018 and 2017 , approximately 231,000 , 143,000 and 72,000 potentially dilutive options, respectively, were excluded from the computation of dilutive common shares because the exercise price of such options exceeded the average market price of the Company's common stock for the respective 12 -month periods during which the options were outstanding.
Acquisitions	The Company accounted for the transaction using the acquisition method in accordance with ASC Topic 805, Business Combinations ("ASC Topic 805"). The allocation of the purchase price was based on estimates of the fair value of assets acquired and liabilities assumed as of November 1, 2017. The Company did not recognize any in-process research and development assets as part of the acquisition.
Goodwill	The Company follows the guidance of ASC Topic 805, Business Combinations ("ASC Topic 805"), in recording goodwill arising from a business combination as the excess of purchase price over the fair value of identifiable assets acquired and liabilities assumed. The Company tests goodwill for impairment at least annually on November 30 in conjunction with preparation of its annual business plan, or more frequently if events or circumstances indicate it might be impaired. The Company tested goodwill for impairment as of November 30, 2019 under ASC Topic 350, Intangibles — Goodwill and Other
Finite-Lived Intangible Assets	Intangible assets with finite useful lives are amortized on a straight-line basis over their respective estimated useful lives to their estimated residual values, and reviewed for impairment in accordance with ASC Topic 360, Property, Plant, and Equipment . Intangible assets consist primarily of customer relationships, trade names and acquired intellectual property. Such intangible assets are amortized using the straight-line method over estimated useful lives of between 10 and 15
Business Segments	The Company's reportable operating segments consist of Technical Products, Fine Paper and Packaging and, in the prior year periods only, Other. The Technical Products segment is an aggregation of the Company's filtration and performance materials businesses which are similar in terms of economic characteristics, nature of products, processes, customer class and product distribution methods. The technical products business is an international producer of fiber-formed, coated and/or saturated specialized media that delivers high performance benefits to customers. Included in this segment are filtration media for transportation, water and other end use applications ("Filtration"), and tape and abrasives backings products ("Backings") and digital image transfer, durable label and other specialty substrate products ("Specialty"). Each segment employs different technologies and marketing strategies. Disclosure of segment information is on the same basis that management uses internally for evaluating segment performance and allocating resources. Transactions between segments are eliminated in consolidation. The costs of shared services, and other administrative functions managed on a common basis, are allocated to the segments based on usage, where possible, or other factors based on the nature of the activity. General corporate expenses that do not directly support the operations of the business segments are shown as Unallocated corporate costs. The accounting policies of the reportable operating segments are the same as those described in Note 2, "Summary of Significant Accounting Policies."

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Schedule of the carrying value and fair value of the Company's debt	The following table presents the carrying value and the fair value of the Company's debt. 12/31/2019 12/31/2018 Carrying Fair Carrying Fair 2021 Senior Notes (5.25% fixed rate) $ 175.0 $ 174.3 $ 175.0 $ 170.5 Global Revolving Credit Facilities (variable rates) 21.6 21.6 57.9 57.9 Second German Loan Agreement (2.5% fixed rate) 3.5 3.6 4.8 5.1 Third German Loan Agreement (1.45% fixed rate) 3.7 3.7 4.9 4.9 Total debt $ 203.8 $ 203.2 $ 242.6 $ 238.4 _______________________ (a)
Schedule of level 3 defined benefit pension plan assets measured at fair value	The following table summarizes the changes in Level 3 defined benefit pension plan assets (Neenah Coldenhove insurance contract) measured at fair value on a recurring basis for the year ended December 31, 2019 and 2018 : Return on plan assets Fair Value at January 1 Attributable to Assets Held at December 31 Attributable to Assets Sold Net Purchases/ (Settlements) Transfers into/ (out of) Level 3 Foreign currency effects Fair For the year ended December 31, 2017 $ — 0.2 — 46.9 — 1.3 $ 48.4 For the year ended December 31, 2018 $ 48.4 (0.9 ) — (0.3 ) — (2.1 ) $ 45.1 For the year ended December 31, 2019 $ 45.1 7.5 — (0.2 ) — (0.9 ) $ 51.5

Earnings per Share ("EPS") (Tab

Earnings per Share ("EPS") (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table presents the computation of basic and diluted shares of common stock used in the calculation of EPS (amounts in millions, except share and per share amounts): Earnings per basic common share Year Ended December 31, 2019 2018 2017 Income from continuing operations $ 55.4 $ 37.2 $ 80.3 Amounts attributable to participating securities (0.3 ) (0.2 ) (0.6 ) Income from continuing operations available to common stockholders 55.1 37.0 79.7 Loss from discontinued operations, net of income taxes — (0.8 ) — Amounts attributable to participating securities — — — Net income available to common stockholders $ 55.1 $ 36.2 $ 79.7 Weighted-average basic shares outstanding 16,848 16,850 16,805 Basic earnings (loss) per share Continuing operations $ 3.27 $ 2.20 $ 4.74 Discontinued operations — (0.05 ) — $ 3.27 $ 2.15 $ 4.74 Earnings per diluted common share Year Ended December 31, 2019 2018 2017 Income from continuing operations $ 55.4 $ 37.2 $ 80.3 Amounts attributable to participating securities (0.3 ) (0.4 ) (0.5 ) Income from continuing operations available to common stockholders 55.1 36.8 79.8 Loss from discontinued operations, net of income taxes — (0.8 ) — Amounts attributable to participating securities — — — Net income available to common stockholders $ 55.1 $ 36.0 $ 79.8 Weighted-average basic shares outstanding 16,848 16,850 16,805 Add: Assumed incremental shares under stock-based compensation plans 58 118 247 Weighted average diluted shares 16,906 16,968 17,052 Diluted earnings (loss) per share Continuing operations $ 3.26 $ 2.17 $ 4.68 Discontinued operations — (0.05 ) — $ 3.26 $ 2.12 $ 4.68

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Summary of allocation of the purchase price to the estimated fair value of the assets acquired and liabilities	The following table summarizes the allocation of the purchase price to the estimated fair value of the assets acquired and liabilities assumed as of December 31, 2017. December 31, 2017 Assets Acquired Cash and cash equivalents $ 4.9 Accounts receivable 4.7 Inventories (a) 12.7 Deferred income taxes 0.4 Prepaid and other current assets 0.2 Property, plant and equipment (a) 31.2 Non-amortizable intangible assets 1.2 Amortizable intangible assets 4.7 Acquired goodwill (a) 10.0 Other assets 0.1 Total assets acquired 70.1 Liabilities Assumed Accounts payable 4.1 Accrued expenses 5.4 Contingent liability (b) 2.3 Deferred income taxes (a) 3.5 Noncurrent employee benefits 4.9 Long-term debt 1.8 Other noncurrent obligations 0.1 Total liabilities assumed 22.1 Net assets acquired $ 48.0 _______________________ (a) The Company had up to 12 months from the closing of the acquisition to finalize its valuations. Management evaluated additional information and determined that the preliminary valuation of inventory at the acquisition date should have been determined using fair value assumptions that would have resulted in the fair value of inventory being lower than originally estimated primarily due to changes in the assumptions related to inventory margins of the acquired business. In addition, management evaluated additional information related to fixed assets and updated the preliminary valuation of fixed assets at the acquisition date. Accordingly, during the nine months ended September 30, 2018, adjustments were made to reduce the carrying value of inventories and fixed assets by $1.5 million , with a corresponding increase to the value of goodwill of $1.1 million , net of income taxes. (b) In conjunction with the acquisition, the Company assumed a contingent liability of $2.3 million related to the acquisition of direct customer relationships by Neenah Coldenhove, which amount was contingent on the growth of sales from these customer relationships in 2018 and 2019. During the year ended December 31, 2018, the Company reduced the estimated liability to $0.8 million and recognized a receivable of $2.4 million from the former shareholders of Neenah Coldenhove related to a claim under an escrow arrangement. These two items totaling $3.9 million were recognized as income during the year ended December 31, 2018, as they relate to the operating results subsequent to the acquisition. These amounts were settled during the year ended December 31, 2019.
Summary of pro forma consolidated statements of operations	The following selected unaudited pro forma consolidated statements of operations data for the year ended December 31, 2017 was prepared as though the Coldenhove Acquisition had occurred on January 1, 2016. The information does not reflect future events that may occur after the acquisition or any operating efficiencies or inefficiencies that may result from the Coldenhove Acquisition. Therefore, the information is not necessarily indicative of results that would have been achieved had the businesses been combined during the periods presented or the results that the Company will experience going forward. Year Ended December 31, 2017 Net sales $ 1,019.8 Operating income 108.9 Net income $ 83.0 Earnings Per Common Share Basic $ 4.90 Diluted $ 4.84

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of changes in the carrying amount of goodwill	The following table presents the carrying value of goodwill by business segment and changes in the carrying value of goodwill. Technical Products Fine Paper and Other Gross Accumulated Gross Amount Accumulated Gross Accumulated Net Net Net Net Balance at December 31, 2017 $ 128.3 $ (49.6 ) $ 78.7 $ 6.2 — 6.2 $ 0.4 — 0.4 $ 85.3 Adjustment of goodwill acquired in the Coldenhove Acquisition (a) 1.1 — 1.1 — — — — — — 1.1 Impairment related to the Brattleboro mill and associated office and research facilities (b) — — — — — — — (0.1 ) (0.1 ) (0.1 ) Foreign currency translation (4.5 ) 2.2 (2.3 ) — — — — — — (2.3 ) Balance at December 31, 2018 124.9 (47.4 ) 77.5 6.2 — 6.2 0.4 (0.1 ) 0.3 84.0 Realignment of Other segment (c) 0.4 (0.1 ) 0.3 — — — (0.4 ) 0.1 (0.3 ) — Foreign currency translation (1.9 ) 1.0 (0.9 ) — — — — — — (0.9 ) Balance at December 31, 2019 $ 123.4 $ (46.5 ) $ 76.9 $ 6.2 $ — $ 6.2 $ — $ — $ — $ 83.1 _______________________ (a) As a result of finalizing the acquisition accounting for Neenah Coldenhove in 2018, an adjustment of $ 1.1 million , net of income taxes, was recorded as a reduction to inventory and fixed assets and increase to goodwill. (b) In conjunction with the sale of the Brattleboro mill, a goodwill impairment loss of $ 0.1 million was recognized in 2018. (c) In January 2019, the Company realigned the remaining products manufactured in the Other business segment to be managed as part of the Technical Products business segment. See Note 14, "Business Segment and Geographic Information."
Schedule of gross carrying amount of intangible assets and the related accumulated amortization for intangible assets subject to amortization	The following table presents intangible assets acquired in conjunction with the Coldenhove Acquisition as of December 31, 2017: Intangibles Estimated Useful Intangible assets — definite lived Trade names and trademarks $ 0.5 10 Customer based intangibles 2.9 15 Acquired technology 1.3 4 Total 4.7 Non-amortizable trade names 1.2 Total intangible assets $ 5.9 12/31/2019 12/31/2018 Gross Accumulated Gross Accumulated Amortizable intangible assets Customer based intangibles $ 38.2 $ (20.4 ) $ 38.3 $ (18.2 ) Trade names and trademarks 5.1 (2.7 ) 5.1 (2.5 ) Acquired technology 16.9 (8.0 ) 16.9 (6.7 ) Total amortizable intangible assets 60.2 (31.1 ) 60.3 (27.4 ) Trade names 37.6 — 37.8 — Total $ 97.8 $ (31.1 ) $ 98.1 $ (27.4 )

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of difference between the effective income tax rate and the U.S. federal statutory income tax rate	The following table presents the principal reasons for the difference between the Company's effective income tax rate and the U.S. federal statutory income tax rate: Year Ended December 31, 2019 2019 2018 2018 2017 2017 U.S. federal statutory income tax rate 21.0 % $ 14.0 21.0 % $ 8.6 35.0 % $ 32.1 U.S. state income taxes, net of federal income tax benefit 1.4 % 0.9 (1.0 )% (0.4 ) 1.9 % 1.7 Foreign tax rate differences (a) 3.6 % 2.4 6.8 % 2.8 (3.4 )% (3.1 ) Tax on foreign dividends (b) 0.9 % 0.6 3.6 % 1.5 (0.3 )% (0.3 ) Foreign financing structure (c) (3.0 )% (2.0 ) (5.1 )% (2.1 ) (2.2 )% (2.0 ) Change in statutory tax rates (d) — % — (3.9 )% (1.6 ) (10.6 )% (9.7 ) Research and development and other tax credits (6.2 )% (4.1 ) (10.5 )% (4.3 ) (3.3 )% (3.0 ) Excess tax benefits from stock compensation (0.2 )% (0.1 ) (2.9 )% (1.2 ) (4.9 )% (4.5 ) Uncertain income tax positions (1.9 )% (1.3 ) 2.0 % 0.8 0.8 % 0.7 Other differences, net 1.1 % 0.7 (0.5 )% (0.2 ) (0.6 )% (0.5 ) Effective income tax rate 16.7 % $ 11.1 9.5 % $ 3.9 12.4 % $ 11.4 _______________________ (a) Represents the impact on the Company's effective tax rate due the mix of earnings among taxing jurisdictions with differing statutory rates. In 2019 and 2018, the U.S. federal tax rate is lower than the tax rate in Germany and the Netherlands. (b) For 2017, the amount reflects the net benefit of the indefinite reinvestment assertion of $4.1 million , less the $3.8 million mandatory one-time tax on the accumulated E&P of foreign subsidiaries from the Tax Act. For 2018, the amount reflects a measurement-period adjustment of $0.8 million to the mandatory one-time tax on the accumulated E&P of foreign subsidiaries, and in 2019 and 2018 includes federal GILTI impacts and state taxation of foreign E&P. (c) Represents the impact on the Company's effective tax rate of the Company's financing strategies. (d) Represents the net benefit from remeasurement of the net deferred income tax liabilities from tax rate changes. For 2017, the amount reflects a tax benefit of $10.3 million from the Tax Act, less $0.6 million of tax expense from a state tax rate change in Germany. For 2018, the amount reflects an additional measurement-period tax benefit adjustment of $0.9 million from the Tax Act, plus $0.7 million of tax benefit from a federal tax rate change in the Netherlands.
Schedule of the U.S. and foreign components of income from continuing operations before income taxes	The following table presents the U.S. and foreign components of income from continuing operations before income taxes: Year Ended December 31, 2019 2018 2017 Income (loss) from continuing operations before income taxes: U.S. $ 30.1 $ (1.7 ) $ 53.6 Foreign 36.4 42.8 38.1 Total $ 66.5 $ 41.1 $ 91.7
Schedule of components of the provision (benefit) for income taxes	The following table presents the components of the provision (benefit) for income taxes: Year Ended December 31, 2019 2018 2017 Provision (benefit) for income taxes: Current: Federal $ 0.3 $ (3.0 ) $ 4.7 State (0.2 ) 0.1 0.5 Foreign 7.6 8.7 6.4 Total current income tax provision 7.7 5.8 11.6 Deferred: Federal 3.0 (0.6 ) (1.8 ) State 0.8 (0.2 ) (0.1 ) Foreign (0.4 ) (1.1 ) 1.7 Total deferred income tax provision 3.4 (1.9 ) (0.2 ) Total provision for income taxes $ 11.1 $ 3.9 $ 11.4
Schedule of components of deferred tax assets and liabilities	The components of deferred income tax assets and liabilities, net of reserves for uncertain tax positions and valuation allowances, are as follows: December 31, 2019 2018 Deferred income tax assets (liabilities) Research and development tax credits $ 21.5 $ 20.0 Employee benefits 15.9 16.5 Net operating losses and other tax credits 6.4 7.4 Lease liabilities 3.1 — Accrued liabilities 2.1 2.3 Interest limitation — 1.7 Inventories (0.6 ) 1.0 Lease right-of-use assets (2.8 ) — Intangibles (4.7 ) (4.2 ) Accelerated depreciation (28.0 ) (28.8 ) Other 0.5 0.5 Net deferred income tax assets $ 13.4 $ 16.4 Deferred income tax assets (liabilities) Accelerated depreciation $ (16.7 ) $ (16.6 ) Intangibles (3.0 ) (3.2 ) Inventories (0.9 ) (1.0 ) Lease right-of-use assets (0.7 ) — Net operating losses 0.2 0.2 Lease liabilities 0.7 — Employee benefits 7.5 6.3 Other — (0.1 ) Net deferred income tax liabilities $ (12.9 ) $ (14.4 )
Schedule of reconciliation of the total amounts of uncertain tax positions	The following is a tabular reconciliation of the total amounts of uncertain tax positions as of and for the years ended December 31, 2019 , 2018 and 2017 : For the Years Ended 2019 2018 2017 Balance at January 1, $ 10.1 $ 10.0 $ 10.3 Increases in prior period tax positions 0.7 0.1 0.4 Decreases in prior period tax positions (1.2 ) — (1.0 ) Increases in current period tax positions 0.6 0.8 0.7 Decreases due to lapse of statutes of limitations (1.5 ) (0.6 ) (1.0 ) Increases due to change in tax rates — 0.1 0.4 Decreases due to settlements with tax authorities (0.9 ) (0.2 ) — Increases (decreases) from foreign exchange rate changes — (0.1 ) 0.2 Balance at December 31, $ 7.8 $ 10.1 $ 10.0

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of long-term debt	Long-term debt consisted of the following: December 31, 2019 2018 2021 Senior Notes (5.25% fixed rate) due May 2021 $ 175.0 $ 175.0 Global Revolving Credit Facilities (variable rates) due December 2023 21.6 57.9 Second German Loan Agreement (2.45% fixed rate) due in quarterly installments ending September 2022 3.5 4.8 Third German Loan Agreement (1.45% fixed rate) due in quarterly installments ending September 2022 3.7 4.9 Deferred financing costs (3.0 ) (3.5 ) Total Debt 200.8 239.1 Less: Debt payable within one year 2.6 2.3 Long-term debt $ 198.2 $ 236.8
Schedule of ABR interest rates applicable to outstanding borrowings	ABR borrowings under the Global Revolving Credit Facilities will bear interest at the highest interest rate shown in the following table: Applicable Margin U.S. Revolving Credit Facility German Revolving Credit Facility Prime rate 0.00%-0.25% Not applicable Federal funds rate +0.50% 0.00%-0.25% Not applicable Monthly LIBOR (which cannot be less than zero percent) +1.00% 0.00%-0.25% Not applicable Overnight LIBOR (which cannot be less than zero percent) Not applicable 1.25%-1.75%
Schedule of debt payments	The following table presents the Company's required debt payments: 2020 2021 2022 2023 2024 Thereafter Total Debt payments $ 2.6 $ 177.8 $ 1.8 $ 21.6 $ — $ — $ 203.8

Pension and Other Postretirem_2

Pension and Other Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Schedule of reconciliation of benefit obligations, plan assets, funded status and net liability information of the Company's pension and other postretirement benefit plans	The following table reconciles the benefit obligations, plan assets, funded status and net liability information of the Company's pension and other postretirement benefit plans. Pension Benefits Postretirement Year Ended December 31, 2019 2018 2019 2018 Change in Benefit Obligation: Benefit obligation at beginning of year $ 430.7 $ 463.9 $ 42.4 $ 44.0 Service cost 5.0 6.7 1.2 1.1 Interest cost 16.2 15.8 1.5 1.4 Currency (1.2 ) (4.6 ) 0.1 (0.3 ) Actuarial (gain) loss 55.0 (29.3 ) (0.7 ) 1.1 Benefit payments from plans (21.1 ) (20.3 ) (4.8 ) (4.9 ) Plan curtailment (a) (2.8 ) — — — Settlement payments (0.5 ) (2.2 ) — — Other 1.1 0.7 — — Benefit obligation at end of year $ 482.4 $ 430.7 $ 39.7 $ 42.4 Change in Plan Assets: Fair value of plan assets at beginning of year $ 375.2 $ 400.4 $ — $ — Actual gain (loss) on plan assets 62.1 (18.9 ) — — Employer contributions 8.3 18.2 — — Currency (0.5 ) (2.7 ) — — Benefit payments (21.1 ) (20.3 ) — — Settlement payments (0.5 ) (2.2 ) — — Other 0.6 0.7 — — Fair value of plan assets at end of year $ 424.1 $ 375.2 $ — $ — Reconciliation of Funded Status Fair value of plan assets $ 424.1 $ 375.2 $ — $ — Projected benefit obligation 482.4 430.7 39.7 42.4 Net liability recognized in statement of financial position $ (58.3 ) $ (55.5 ) $ (39.7 ) $ (42.4 ) Amounts recognized in statement of financial position consist of: Current liabilities $ (1.2 ) $ (1.7 ) $ (5.6 ) $ (5.2 ) Noncurrent liabilities (57.1 ) (53.8 ) (34.1 ) (37.2 ) Net amount recognized $ (58.3 ) $ (55.5 ) $ (39.7 ) $ (42.4 ) _______________________ (a) For the year ended December 31, 2019, the Company recognized a curtailment gain of $1.6 million related to the Neenah Coldenhove pension plan. See discussion earlier in this Note.
Schedule of amounts recognized in accumulated other comprehensive income	Amounts recognized in accumulated other comprehensive income (loss) consist of: Pension Postretirement December 31, 2019 2018 2019 2018 Accumulated actuarial loss $ 117.8 $ 110.1 $ 7.2 $ 8.7 Prior service cost 0.9 0.7 — — Total recognized in AOCI $ 118.7 $ 110.8 $ 7.2 $ 8.7
Summary of disaggregated information about the pension plans	Summary disaggregated information about the pension plans follows: December 31, Assets Exceed ABO ABO Exceed Assets Total 2019 2018 2019 2018 2019 2018 Projected benefit obligation $ — $ 130.3 $ 482.4 $ 300.4 $ 482.4 $ 430.7 Accumulated benefit obligation — 125.4 478.3 298.5 478.3 423.9 Fair value of plan assets — 128.8 424.1 246.4 424.1 375.2
Schedule of components of net periodic benefit cost for Defined Benefit Plans	Components of Net Periodic Benefit Cost Pension Benefits Postretirement Benefits Year Ended December 31, 2019 2018 2017 2019 2018 2017 Service cost $ 5.0 $ 6.7 $ 5.5 $ 1.2 $ 1.1 $ 1.2 Interest cost 16.2 15.8 15.0 1.5 1.4 1.4 Expected return on plan assets (a) (21.1 ) (21.0 ) (19.9 ) — — — Recognized net actuarial loss 4.9 5.2 5.6 0.9 0.8 0.3 Amortization of prior service cost (credit) 0.2 0.2 0.2 — (0.2 ) (0.2 ) Curtailment gain (1.6 ) — — — — — Amount of settlement loss recognized 0.1 0.8 0.6 — — — Net periodic benefit cost $ 3.7 $ 7.7 $ 7.0 $ 3.6 $ 3.1 $ 2.7 _______________________ (a) The expected return on plan assets, excluding the Neenah Coldenhove plan assets, is determined by multiplying the fair value of plan assets at the prior year-end (adjusted for estimated current year cash benefit payments and contributions) by the expected long-term rate of return. The Neenah Coldenhove pension plan is funded through an insurance contract, and the expected return on plan assets is calculated based on the discount rate of the insured obligations.
Schedule of other changes in plan assets and benefit obligations recognized in other comprehensive income	Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) Pension Benefits Postretirement Benefits Year Ended December 31, 2019 2018 2017 2019 2018 2017 Net periodic benefit expense $ 3.7 $ 7.7 $ 7.0 $ 3.6 $ 3.1 $ 2.7 Accumulated actuarial gain (loss) 7.7 4.2 10.1 (1.5 ) 0.1 3.7 Prior service cost (credit) 0.2 (0.1 ) (0.1 ) — 0.2 0.2 Total recognized in other comprehensive income (loss) 7.9 4.1 10.0 (1.5 ) 0.3 3.9 Total recognized in net periodic benefit cost and other comprehensive income (loss) $ 11.6 $ 11.8 $ 17.0 $ 2.1 $ 3.4 $ 6.6
Schedule of weighted-average assumptions used to determine benefit obligations	Weighted-Average Assumptions Used to Determine Benefit Obligations at December 31 Pension Benefits Postretirement Benefits Other than Pensions 2019 2018 2019 2018 Discount rate 2.98 % 3.94 % 2.68 % 3.84 % Rate of compensation increase 2.05 % 2.34 % — % — % Initial healthcare cost trend rate — % — % 6.10 % 6.80 % Ultimate healthcare cost trend rate — % — % 4.50 % 4.50 % Ultimate year — — 2037 2037
Schedule of weighted-average assumptions used to determine net periodic benefit cost	Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost for Years Ended December 31 Pension Benefits Postretirement Benefits Other than Pensions Year Ended December 31, 2019 2018 2017 2019 2018 2017 Discount rate 3.78 % 3.65 % 4.18 % 3.84 % 3.42 % 3.89 % Expected long-term return on plan assets (a) 5.91 % 5.78 % 6.31 % — % — % — % Rate of compensation increase 2.33 % 2.44 % 2.49 % 2.50 % 2.50 % — % Initial healthcare cost trend rate — % — % — % 6.50 % 6.80 % 7.00 % Ultimate healthcare cost trend rate — % — % — % 4.50 % 4.50 % 4.50 % Ultimate year — — — 2037 2037 2037 _______________________ (a) The expected long-term return on plan assets does not include the Neenah Coldenhove plan assets. The Neenah Coldenhove pension plan is funded through an insurance contract, and the expected return on plan assets is calculated based on the discount rate of the insured obligations.
Schedule of pension plan asset allocations	Pension plan asset allocations are as follows: Percentage of Plan 2019 2018 Asset Category (a) Equity securities 33 % 33 % Hedge fund / Other 8 % 8 % Debt securities / Fixed Income 59 % 58 % Cash and money-market funds — % 1 % Total 100 % 100 % _______________________ (a) The asset categories do not include the insurance contract related to the Neenah Coldenhove pension plan.
Schedule of target investment allocation and permissible allocation range for plan assets by category	The weighted average target investment allocation and permissible allocation range for plan assets by category are as follows: Strategic Target Permitted Range Asset Category Equity securities 33 % 28-38% Hedge fund / Other 8 % 3-13% Debt securities / Fixed Income 59 % 54-64%
Schedule of future benefit payments	The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid: Pension Plans Postretirement Benefits Other than Pensions 2020 $ 22.3 $ 5.6 2021 27.1 5.0 2022 23.3 4.6 2023 24.2 4.2 2024 25.0 3.9 Years 2025-2029 129.3 13.7
Schedule of effects of one-percentage-point change in assumed health care cost trend rates	Assumed health care cost trend rates affect the amounts reported for postretirement health care benefit plans. A one percentage-point change in assumed health care cost trend rates would have the following effects: One Percentage- Point Increase Decrease Effect on total of service and interest cost components $ — $ — Effect on post-retirement benefit other than pension obligation 0.2 (0.2 )

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Schedule of stock-based compensation expense and related income tax benefits	The following table summarizes stock-based compensation costs and related income tax benefits. Year Ended December 31, 2019 2018 2017 Stock-based compensation expense $ 5.6 $ 4.0 $ 6.4 Income tax benefit (1.4 ) (1.0 ) (2.5 ) Stock-based compensation, net of income tax benefit $ 4.2 $ 3.0 $ 3.9
Schedule of total compensation costs related to the Company's equity awards and amounts recognized	The following table summarizes total compensation costs related to the Company's equity awards and amounts recognized in the year ended December 31, 2019 . Stock Options Performance Unrecognized compensation cost — December 31, 2018 $ 0.6 $ 2.1 Grant date fair value current year grants — 5.5 Compensation expense recognized (0.4 ) (5.2 ) Unrecognized compensation cost — December 31, 2019 $ 0.2 $ 2.4 Expected amortization period (in years) 1.1 1.6
Schedule of stock options awarded	The following tables present information regarding stock options awarded during the years ended December 31, 2019 , 2018 and 2017 . 2019 2018 2017 Stock options granted 1,272 108,420 144,089 Per share weighted-average exercise price $ 66.59 $ 93.22 $ 82.11 Per share weighted-average grant date fair value $ 10.32 $ 15.00 $ 13.54
Schedule of assumptions used to determine the grant date fair value of options granted	The weighted-average grant date fair value for stock options granted for the years ended December 31, 2019 , 2018 and 2017 was estimated using the Black-Scholes option valuation model with the following assumptions: 2019 2018 2017 Expected term in years 5.0 5.7 5.8 Risk free interest rate 1.8 % 2.5 % 2.1 % Volatility 23.1 % 21.5 % 22.9 % Dividend yield 3.0 % 3.0 % 3.0 %
Schedule of stock option activity under the Omnibus Plan	The following table summarizes stock option activity under the Omnibus Plan for the year ended December 31, 2019 : Number of Weighted-Average Options outstanding — December 31, 2018 451,081 $ 67.46 Add: Options granted 1,272 $ 66.59 Less: Options exercised 34,073 $ 35.26 Less: Options forfeited/cancelled 1,732 $ 71.89 Options outstanding — December 31, 2019 416,548 $ 70.08
Schedule of outstanding and exercisable stock options summarized by exercise price	The status of outstanding and exercisable stock options as of December 31, 2019 , summarized by exercise price follows: Options Vested or Expected to Vest Options Exercisable Exercise Price Number of Weighted- Weighted- Aggregate Number of Weighted- Aggregate $13.38 — $22.44 8,745 0.8 $ 18.72 $ 0.4 8,745 $ 18.72 $ 0.4 $24.09 — $42.82 56,380 3.3 $ 34.28 2.0 56,380 $ 34.28 2.0 $48.19 — $74.20 121,703 5.8 $ 58.45 1.5 120,347 $ 58.35 1.5 $74.70 — $93.35 229,720 7.5 $ 86.93 — 132,557 $ 85.35 — 416,548 6.3 $ 70.08 $ 3.9 318,029 $ 64.36 $ 3.9 _______________________ (a) Represents the total pre-tax intrinsic value as of December 31, 2019 that option holders would have received had they exercised their options as of such date. The pre-tax intrinsic value is based on the closing market price for the Company's common stock of $70.43 on December 31, 2019 .
Schedule of status of the Company's unvested stock options	The following table summarizes the status of the Company's unvested stock options as of December 31, 2019 and activity for the year then ended: Number of Weighted-Average Outstanding — December 31, 2018 210,178 $ 14.21 Add: Options granted 1,272 $ 10.32 Less: Options vested 111,615 $ 14.04 Less: Options forfeited 1,316 $ 13.73 Outstanding — December 31, 2019 98,519 $ 14.41
Summary of activity of unvested stock-based awards	The following table summarizes the activity of the Company's unvested stock-based awards (other than stock options) for the years ended December 31, 2019 , 2018 and 2017 : RSUs Weighted-Average PSUs Weighted-Average Outstanding — December 31, 2016 80,719 $ 54.91 53,506 $ 73.79 Shares granted (a) 10,318 $ 76.84 41,883 $ 81.85 Shares vested (72,451 ) $ 55.26 — $ — Performance Shares vested 73,838 $ 52.11 (53,506 ) $ 73.79 Shares expired or cancelled (3,625 ) $ 50.48 (506 ) $ 81.85 Outstanding — December 31, 2017 88,799 $ 53.33 41,377 $ 81.85 Shares granted (a) 10,618 $ 82.29 40,747 $ 93.21 Shares vested (72,190 ) $ 60.24 — $ — Performance Shares vested 33,928 $ 88.40 (31,421 ) $ 81.85 Shares expired or cancelled (7,695 ) $ 84.45 (3,482 ) $ 84.45 Outstanding — December 31, 2018 53,460 $ 67.53 47,221 $ 93.21 Shares granted (a) 46,556 $ 67.04 49,730 $ 69.05 Shares vested (63,595 ) $ 72.91 — $ — Performance Shares vested 10,354 $ 93.21 (25,833 ) $ 93.21 Shares expired or cancelled (2,113 ) $ 69.35 (4,927 ) $ 85.67 Outstanding — December 31, 2019 (b) 44,662 $ 65.23 66,191 $ 75.62 _______________________ (a) For the years ended December 31, 2019 , 2018 and 2017 , includes 43 RSUs, 132 RSUs and 226 RSUs, respectively, that were granted in lieu of cash dividends. Such dividends-in-kind vest concurrently with the underlying RSUs. (b) The aggregate pre-tax intrinsic value of outstanding RSUs as of December 31, 2019 was $3.1 million .

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Stockholders' Equity Note [Abstract]
Schedules of shares purchased under stock purchase plan	The following table shows shares purchased under the respective stock purchase plans: Year Ended December 31, 2019 2018 2017 Shares $ Shares $ Shares $ 2019 Stock Purchase Plan 79,676 $ 4.9 2018 Stock Purchase Plan 124,434 $ 9.3 2017 Stock Purchase Plan — — 2016 Stock Purchase Plan 85,354 $ 6.8
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents changes in accumulated other comprehensive income (loss): Year Ended December 31, 2019 2018 2017 Pretax Tax Net Pretax Tax Net Pretax Tax Net Unrealized foreign currency translation gains (losses) $ (3.5 ) $ — $ (3.5 ) $ (7.9 ) $ (0.1 ) $ (8.0 ) $ 20.0 $ — $ 20.0 Adjustment to pension and other benefit liabilities (a) (6.4 ) 1.7 $ (4.7 ) (4.4 ) 1.1 (3.3 ) (13.8 ) 2.9 (10.9 ) Unrealized loss on "available-for-sale" securities (b) — — — — — — (0.4 ) 0.1 (0.3 ) Other comprehensive income (loss) $ (9.9 ) $ 1.7 $ (8.2 ) $ (12.3 ) $ 1.0 $ (11.3 ) $ 5.8 $ 3.0 $ 8.8 _______________________ (a) In conjunction with the Tax Act, the Company early adopted in the fourth quarter of 2017 ASU 2018-02, Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income (Topic 740) and accordingly reclassified $10.9 million from AOCI to retained earnings to address the stranded tax effects resulting from the effect of lower tax rates in the Tax Act on items with AOCI. (b) The Company adopted ASU 2016-01, Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities as of January 1, 2018. As a result of the adoption, the Company reclassified $0.3 million of unrealized losses (net of $0.1 million income tax effect) on "available-for-sale" securities to beginning retained earnings. The components of accumulated other comprehensive income (loss), net of applicable income taxes are as follows: December 31, 2019 2018 Net loss from pension and other postretirement benefit liabilities, net of income tax benefits of $31.6 million and $29.9 million, respectively $ (94.3 ) $ (89.6 ) Unrealized foreign currency translation losses, net of income tax benefits of $0.3 and $0.3, respectively (19.0 ) (15.5 ) AOCI $ (113.3 ) $ (105.1 )

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Lease, cost	The components of lease expense were as follows: Year Ended December 31, 2019 Operating lease cost $ 3.1 Short-term lease cost 1.5 Variable lease cost (a) 2.1 _______________________ (a) The variable lease costs consist mainly of a warehouse lease where the cost is determined based on the square footage used each month.
Lease, liability, maturities	Maturities of lease liabilities were as follows: Year Ending December 31, Operating Leases 2020 $ 2.8 2021 2.6 2022 2.3 2023 2.0 2024 1.7 Thereafter 7.4 Total lease payments 18.8 Less: Imputed interest 3.9 Total lease liabilities $ 14.9

Commitments, Contingencies, a_2

Commitments, Contingencies, and Legal Matters (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule Of bargaining agreements	The following table shows the status of the Company's bargaining agreements as of December 31, 2019 . Contract Expiration Date Location Union Number of Employees April 2020 Eerbeek, Netherlands CNV, FNV (a) August 2020 Weidach and Bruckmühl, Germany IG BCE (a) January 2021 Whiting, WI USW 203 June 2021 Neenah, WI USW 244 July 2021 Munising, MI USW 177 November 2021 Lowville, NY USW 98 May 2022 Appleton, WI USW 89 _______________________ (a) Under Germany and Netherlands laws, union membership is voluntary and does not need to be disclosed to the Company. As a result, the number of employees covered by the collective bargaining agreement with the IG BCE, and the CNV and FNV cannot be determined.

Business Segment and Geograph_2

Business Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Schedule of net sales by product	The following table presents sales by product category for the technical products business: Year Ended December 31, 2019 2018 2017 Filtration 42 % 40 % 42 % Backings 24 % 28 % 31 % Specialty 34 % 32 % 27 % Total 100 % 100 % 100 % Year Ended December 31, 2019 2018 2017 Graphic Imaging 79 % 78 % 80 % Packaging 21 % 18 % 16 % Filing/Office — % 4 % 4 % Total 100 % 100 % 100 %
Schedule of net sales, operating income (loss) and total assets for each business segment	Business Segments Year Ended December 31, 2019 2018 2017 Net sales Technical Products $ 541.6 $ 583.2 $ 518.6 Fine Paper and Packaging 396.9 445.8 455.3 Other — 5.9 6.0 Consolidated $ 938.5 $ 1,034.9 $ 979.9 Year Ended December 31, 2019 2018 2017 Operating income (loss) Technical Products (a) $ 44.6 $ 50.9 $ 55.3 Fine Paper and Packaging (b) 53.2 29.4 69.5 Other (c) — (6.4 ) (0.4 ) Unallocated corporate costs (d) (19.5 ) (19.8 ) (20.1 ) Consolidated $ 78.3 $ 54.1 $ 104.3 _______________________ (a) Operating income for the year ended December 31, 2019 included restructuring and other non-routine costs of $ 0.3 million and a curtailment gain of $1.6 million related to the Neenah Coldenhove pension plan. Operating income for the year ended December 31, 2018 included non-cash impairment loss, restructuring and integration costs, and pension settlement charges of $2.5 million , offset by favorable acquisition adjustments of $3.9 million . (b) Operating income for the year ended December 31, 2019 included $5.7 million of non-routine costs, primarily related to idled paper machine costs due to the consolidation of the fine paper manufacturing footprint. Operating income for the year ended December 31, 2018 included non-cash impairment loss, restructuring costs, and pension settlement charges of $24.6 million , offset by favorable insurance settlement of $0.3 million . Operating income for the year ended December 31, 2017 included a favorable insurance settlement of $2.9 million . Operating income for the year ended December 31, 2016 included integration costs of $1.8 million . (c) Operating income for the year ended December 31, 2018 included non-cash impairment loss, restructuring costs, and a pension settlement charge of $6.0 million , offset by favorable insurance settlement of $0.1 million . Operating income for the year ended December 31, 2017 included a favorable insurance settlement of $0.3 million . Operating income for the years ended December 31, 2016 included integration costs of $1.1 million . (d) Unallocated corporate costs for the year ended December 31, 2019 included costs of $0.3 million, consisting of restructuring and other non-routine costs and a SERP settlement charge. Unallocated corporate costs for the year ended December 31, 2018 included restructuring costs and pension settlement charge of $1.9 million . Unallocated corporate costs for the year ended December 31, 2017 included acquisition and integration costs of $1.3 million and $0.6 million from pension plan and SERP settlement costs. December 31, 2016 included $2.7 million of pre-operating costs related to conversion of a fine paper machine to filtration and $0.8 million for a pension plan settlement charge. Year Ended December 31, 2019 2018 2017 Depreciation and amortization Technical Products $ 24.1 $ 24.4 $ 20.3 Fine Paper and Packaging 13.2 9.9 11.0 Other — 0.2 0.3 Corporate 1.6 1.6 1.7 Consolidated $ 38.9 $ 36.1 $ 33.3 Year Ended December 31, 2019 2018 2017 Capital expenditures Technical Products $ 13.1 $ 28.0 $ 29.7 Fine Paper and Packaging 7.7 8.7 12.5 Corporate 0.6 1.4 0.5 Consolidated $ 21.4 $ 38.1 $ 42.7 December 31, 2019 2018 Total Assets (a) Technical Products $ 573.8 $ 599.3 Fine Paper and Packaging 217.7 234.7 Corporate and other (b) 36.3 27.2 Total $ 827.8 $ 861.2 _______________________ (a) Segment identifiable assets are those that are directly used in the segments operations. (b) Corporate assets are primarily deferred income taxes and lease ROU assets.
Schedule of net sales and assets by geographic areas	Geographic Information Year Ended December 31, 2019 2018 2017 Net sales United States $ 673.0 $ 744.4 $ 748.9 Germany 196.3 216.5 210.3 Rest of Europe 69.2 74.0 20.7 Consolidated $ 938.5 $ 1,034.9 $ 979.9
Long-lived Assets by Geographic Areas	Net sales are attributed to geographic areas based on the physical location of the selling entities. December 31, 2019 2018 Long-Lived Assets United States $ 364.2 $ 366.3 Germany 153.3 157.9 Rest of Europe 57.6 59.1 Total $ 575.1 $ 583.3

Supplemental Data (Tables)

Supplemental Data (Tables)	12 Months Ended
	Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]
Summary of advertising and research and development expenses	Summary of Advertising and Research and Development Expenses Year Ended December 31, 2019 2018 2017 Advertising expense (a) $ 4.9 $ 4.7 $ 6.0 Research and development expense 8.7 9.2 8.9 _______________________ (a) Advertising expense and research and development expense are recorded in Selling, general and administrative expenses on the consolidated statements of operations.
Summary of accounts receivable - net	Summary of Accounts Receivable, net December 31, 2019 2018 From customers $ 104.1 $ 116.1 Less allowance for doubtful accounts and sales discounts (1.5 ) (1.3 ) Total $ 102.6 $ 114.8
Schedule of inventories by major class	Summary of Inventories December 31, 2019 2018 Inventories by Major Class: Raw materials $ 32.8 $ 35.6 Work in progress 26.4 30.1 Finished goods 67.3 78.3 Supplies and other 5.2 3.0 131.7 147.0 Excess of FIFO over LIFO cost (8.9 ) (15.4 ) Total $ 122.8 $ 131.6
Summary of prepaid and other current assets	Summary of Prepaid and Other Current Assets December 31, 2019 2018 Prepaid and other current assets $ 9.9 $ 12.2 Spare parts 6.4 6.6 Receivable for income taxes 2.0 2.8 Total $ 18.3 $ 21.6
Summary of property, plant and equipment - net	Summary of Property, Plant and Equipment, net December 31, 2019 2018 Land and land improvements $ 19.4 $ 19.0 Buildings 165.4 156.0 Machinery and equipment 651.0 650.3 Construction in progress 14.8 14.9 850.6 840.2 Less accumulated depreciation 470.0 444.0 Net Property, Plant and Equipment $ 380.6 $ 396.2
Summary of accrued expenses	Summary of Accrued Expenses December 31, 2019 2018 Accrued salaries and employee benefits $ 26.2 $ 23.9 Amounts due to customers 8.9 9.6 Accrued income taxes 0.5 5.3 Accrued utilities 3.0 3.9 Accrued interest 1.2 1.2 Other 7.2 11.3 Total $ 47.0 $ 55.2
Summary of noncurrent employee benefits	Summary of Noncurrent Employee Benefits December 31, 2019 2018 Pension benefits $ 57.1 $ 54.0 Post-employment benefits other than pensions (a) 36.0 38.9 Total $ 93.1 $ 92.9 _______________________ (a) Post-employment benefits other than pensions included $1.7 million of SRCP benefits, $0.7 million of Canadian long-term disability benefits, and $0.2 million of other long-term benefits as of December 31, 2019. As of December 31, 2018, $1.7 million of SRCP benefits and $0.8 million of Canadian long-term disability benefits were included.
Schedule of supplemental disclosure of cash flow information	Supplemental Disclosure of Cash Flow Information Year Ended December 31, 2019 2018 2017 Cash paid during the year for interest, net of interest expense capitalized $ 10.9 $ 11.9 $ 11.3 Cash paid during the year for income taxes, net of refunds 13.3 7.6 7.6 Non-cash investing activities: Liability for equipment acquired 3.2 3.4 5.4
Schedule of net cash provided by (used in) changes in working capital, net of effect of acquisitions	Net Cash Provided by (Used in) Changes in Operating Working Capital, Net of Effect of Acquisitions Year Ended December 31, 2019 2018 2017 Accounts receivable $ 11.6 $ (0.9 ) $ (10.2 ) Inventories 8.2 3.8 (11.7 ) Income taxes receivable/payable (5.4 ) (1.8 ) 4.5 Prepaid and other current assets 2.4 (1.8 ) (0.4 ) Accounts payable (14.0 ) 0.3 10.6 Accrued expenses (3.4 ) (0.6 ) (4.2 ) Other — — (0.4 ) Total $ (0.6 ) $ (1.0 ) $ (11.8 )

Unaudited Quarterly Data (Table

Unaudited Quarterly Data (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Schedule of unaudited quarterly data	2019 Quarters First Second (a) Third (b) Fourth (c) Year Net Sales $ 239.7 $ 253.4 $ 231.8 $ 213.6 $ 938.5 Gross Profit 43.7 50.7 44.7 44.3 183.4 Operating Income (Loss) 17.4 19.8 19.0 22.1 78.3 Income (Loss) From Continuing Operations 11.8 13.6 14.4 15.6 55.4 Earnings (Loss) Per Common Share From Continuing Operations: Basic $ 0.70 $ 0.80 $ 0.85 $ 0.92 $ 3.27 Diluted $ 0.69 $ 0.80 $ 0.84 $ 0.92 $ 3.26 _______________________ (a) Operating income includes idled paper machine costs of $2.0 million , indirect tax audit costs for 2012-15 of $0.6 million , and restructuring and other non-routine costs of $0.9 million . (b) Operating income includes idled paper machine costs of $2.4 million , indirect tax audit costs for 2012-15 of $0.1 million , a favorable adjustment to restructuring and other non-routine costs of $0.2 million , and a SERP settlement charge of $0.1 million . (c) Operating income includes idled paper machine costs of $0.3 million , a pension plan curtailment gain of $1.6 million , and a pension plan curtailment charge of $0.1 million . 2018 Quarters First (d) Second (e) Third (f) Fourth (g) Year Net Sales $ 266.5 $ 271.3 $ 256.2 $ 240.9 $ 1,034.9 Gross Profit 52.4 55.1 41.3 34.6 183.4 Operating Income 24.1 (4.3 ) 16.5 17.8 54.1 Income From Continuing Operations 16.2 (4.8 ) 12.9 12.9 37.2 Earnings Per Common Share From Continuing Operations: Basic $ 0.96 $ (0.29 ) $ 0.76 $ 0.77 $ 2.20 Diluted $ 0.95 $ (0.29 ) $ 0.75 $ 0.76 $ 2.17 _______________________ (d) Income from continuing operations includes an unfavorable prior year tax adjustment of $0.9 million related to one-time taxes on foreign earnings under the Tax Act and an after-tax SERP settlement charge of $0.6 million . (e) Operating loss includes an impairment loss of $32.0 million , pension settlement charges of $1.0 million and integration and restructuring charges of $0.3 million . (f) Operating income includes a favorable acquisition-related adjustment of $3.1 million , a favorable insurance settlement of $0.4 million , and unfavorable adjustments to the impairment loss of $2.0 million and $2.2 million of integration and restructuring charges. (g) Operating income includes favorable adjustments to the impairment loss of $2.9 million and $0.4 million to integration and restructuring costs and a favorable acquisition-related adjustment of $0.8 million . Income from continuing operations includes a favorable tax adjustment related to a Netherlands tax rate change of $0.7 million .

Background and Basis of Prese_2

Background and Basis of Presentation (Details)	12 Months Ended
	Dec. 31, 2019primary_operation
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of primary operations	2

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Revenue Recognition (Details)	12 Months Ended
	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Payment discount	1.00%
Payment discount days available	20 days
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Collection terms	45 days
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Collection terms	55 days
International
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Extended collection terms	120 days
Fine Paper and Packaging | Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Collection terms	20 days
Payment discount	0.00%
Fine Paper and Packaging | Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Collection terms	30 days
Payment discount	2.00%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Postretirement Benefits Other than Pensions
Cash and Cash Equivalents
Restricted cash and cash equivalent	$ 0.1	$ 0.1

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Property and Depreciation (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Property and Depreciation
Assets in which units-of-production method of depreciation is used	$ 69.3
Buildings
Property and Depreciation
Weighted average useful lives	19 years
Land improvements
Property and Depreciation
Weighted average useful lives	19 years
Machinery and equipment
Property and Depreciation
Weighted average useful lives	10 years

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	May 31, 2013
Marketable securities
Cost of marketable securities	$ 4.4
Senior notes | 2021 Senior Notes (5.25% fixed rate) due May 2021
Fair Value of Financial Instruments
Fixed rate of interest (as a percent)	5.25%			5.25%
Secured debt | Second German Loan Agreement (2.45% fixed rate) due in quarterly installments ending September 2022
Fair Value of Financial Instruments
Fixed rate of interest (as a percent)	2.45%
Secured debt | Third German Loan Agreement (1.45% fixed rate)
Fair Value of Financial Instruments
Fixed rate of interest (as a percent)	1.45%		1.45%
Carrying Value
Fair Value of Financial Instruments
Debt fair value	$ 203.8	$ 242.6
Carrying Value | Senior notes | 2021 Senior Notes (5.25% fixed rate) due May 2021
Fair Value of Financial Instruments
Debt fair value	175	175
Carrying Value | Line of credit | Global Revolving Credit Facilities (variable rates) due December 2023
Fair Value of Financial Instruments
Debt fair value	21.6	57.9
Carrying Value | Secured debt | Second German Loan Agreement (2.45% fixed rate) due in quarterly installments ending September 2022
Fair Value of Financial Instruments
Debt fair value	3.5	4.8
Carrying Value | Secured debt | Third German Loan Agreement (1.45% fixed rate)
Fair Value of Financial Instruments
Debt fair value	3.7	4.9
Fair Value | Level 2
Fair Value of Financial Instruments
Debt fair value	203.2	238.4
Fair Value | Level 2 | Senior notes | 2021 Senior Notes (5.25% fixed rate) due May 2021
Fair Value of Financial Instruments
Debt fair value	174.3	170.5
Fair Value | Level 2 | Line of credit | Global Revolving Credit Facilities (variable rates) due December 2023
Fair Value of Financial Instruments
Debt fair value	21.6	57.9
Fair Value | Level 2 | Secured debt | Second German Loan Agreement (2.45% fixed rate) due in quarterly installments ending September 2022
Fair Value of Financial Instruments
Debt fair value	3.6	5.1
Fair Value | Level 2 | Secured debt | Third German Loan Agreement (1.45% fixed rate)
Fair Value of Financial Instruments
Debt fair value	$ 3.7	$ 4.9

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Fair Value Disclosures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 400.4	$ 424.1	$ 375.2
Level 3 | W.A. Sanders Coldenhove Holding B.V. | Insurance Contracts Acquired in Business Combination
Defined Benefit Plan Disclosure [Line Items]
Net Purchases/ (Settlements)	$ 46.8
Cash and cash equivalents | Level 1 | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0.8	1.7
U.S. and Non-U.S. Equities | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at NAV		122.5	107.8
U.S. and Non-U.S. Fixed Income Securities | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at NAV		219.4	192.7
Hedge Funds | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at NAV		$ 29.9	$ 27.9

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Summary of the Changes in Level 3 Defined Benefit Plan Assets (Details) - Level 3 - W.A. Sanders Coldenhove Holding B.V. - Insurance Contracts Acquired in Business Combination - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation
Fair value of plan assets at beginning of year	$ 45.1	$ 48.4	$ 0
Attributable to Assets Held at December 31	7.5	(0.9)	0.2
Attributable to Assets Sold	0	0	0
Net Purchases/ (Settlements)	(0.2)	(0.3)	46.9
Transfers into/ (out of) Level 3	0	0	0
Foreign currency effects	(0.9)	(2.1)	1.3
Fair value of plan assets at end of year	$ 51.5	$ 45.1	$ 48.4

Summary of Significant Accou_10

Summary of Significant Accounting Policies - Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disposal Groups
Loss from discontinued operations, net of income taxes		$ 0	$ 0.8	$ 0
Lahnstein Mill
Disposal Groups
Loss from discontinued operations, net of income taxes	$ 0.8

Summary of Significant Accou_11

Summary of Significant Accounting Policies - Recently Adopted Accounting Standards (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease right-of-use assets		$ 13.9
Operating lease liability		$ 14.9
Accounting Standards Update 2017-07 | Cost of Products Sold
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net periodic benefit expense	$ 1.5
Accounting Standards Update 2017-07 | Selling, General and Administrative Expenses
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net periodic benefit expense	$ 1.2
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease right-of-use assets			$ 16
Operating lease liability			$ 17

Earnings per Share ("EPS") - Na

Earnings per Share ("EPS") - Narrative (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Potentially dilutive options, excluded from the computation of dilutive common shares (shares)	231	143	72

Earnings per Share ("EPS") - Sc

Earnings per Share ("EPS") - Schedule of Earnings Per Share Calculations, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings per basic common share
Income from continuing operations	$ 15.6	$ 14.4	$ 13.6	$ 11.8	$ 12.9	$ 12.9	$ (4.8)	$ 16.2	$ 55.4	$ 37.2	$ 80.3
Amounts attributable to participating securities									(0.3)	(0.2)	(0.6)
Income from continuing operations available to common stockholders									55.1	37	79.7
Loss from discontinued operations, net of income taxes									0	(0.8)	0
Amounts attributable to participating securities									0	0	0
Net income available to common stockholders									$ 55.1	$ 36.2	$ 79.7
Weighted-average basic shares outstanding (in shares)									16,848	16,850	16,805
Continuing operations (in dollars per share)	$ 0.92	$ 0.85	$ 0.80	$ 0.70	$ 0.77	$ 0.76	$ (0.29)	$ 0.96	$ 3.27	$ 2.20	$ 4.74
Discontinued operations (in dollars per share)									0	(0.05)	0
Basic (in dollars per share)									$ 3.27	$ 2.15	$ 4.74
Earnings per diluted common share
Income from continuing operations	$ 15.6	$ 14.4	$ 13.6	$ 11.8	$ 12.9	$ 12.9	$ (4.8)	$ 16.2	$ 55.4	$ 37.2	$ 80.3
Amounts attributable to participating securities									(0.3)	(0.4)	(0.5)
Income from continuing operations available to common stockholders									55.1	36.8	79.8
Loss from discontinued operations, net of income taxes									0	(0.8)	0
Amounts attributable to participating securities									0	0	0
Net income available to common stockholders									$ 55.1	$ 36	$ 79.8
Weighted-average basic shares outstanding (in shares)									16,848	16,850	16,805
Assumed incremental shares under stock-based compensation plans (in shares)									58	118	247
Weighted average diluted shares (in shares)									16,906	16,968	17,052
Continuing operations (in dollars per share)	$ 0.92	$ 0.84	$ 0.80	$ 0.69	$ 0.76	$ 0.75	$ (0.29)	$ 0.95	$ 3.26	$ 2.17	$ 4.68
Discontinued operations (in dollars per share)									0	(0.05)	0
Diluted (in dollars per share)									$ 3.26	$ 2.12	$ 4.68

Acquisitions - Coldenhove Acqui

Acquisitions - Coldenhove Acquisition Narrative (Details) - USD ($)	Nov. 01, 2017	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Net sales										$ 938,500,000	$ 1,034,900,000	$ 979,900,000
W.A. Sanders Coldenhove Holding B.V.
Business Acquisition [Line Items]
Business acquisition, purchase price	$ 43,000,000
Goodwill expected to be deductible for income tax purpose	$ 0
Restructuring, integration, and other costs											500,000	1,300,000
Product
Business Acquisition [Line Items]
Net sales		$ 213,600,000	$ 231,800,000	$ 253,400,000	$ 239,700,000	$ 240,900,000	$ 256,200,000	$ 271,300,000	$ 266,500,000	$ 938,500,000	$ 1,034,900,000	979,900,000
Product | W.A. Sanders Coldenhove Holding B.V.
Business Acquisition [Line Items]
Net sales												$ 7,500,000

Acquisitions - Summary of Asset

Acquisitions - Summary of Assets Acquired and Liabilities Assumed Coldenhove Acquisition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Nov. 01, 2017
Assets Acquired
Acquired goodwill (a)	$ 84			$ 83.1	$ 84	$ 85.3
Liabilities Assumed
Acquisition related adjustments	(0.8)	$ 3.1		$ 0	3.9	0
W.A. Sanders Coldenhove Holding B.V.
Assets Acquired
Cash and cash equivalents						4.9
Accounts receivable						4.7
Inventories (a)						12.7
Deferred income taxes						0.4
Prepaid and other current assets						0.2
Property, plant and equipment (a)						31.2
Non-amortizable intangible assets						1.2
Amortizable intangible assets						4.7
Acquired goodwill (a)						10
Other assets						0.1
Total assets acquired						70.1
Liabilities Assumed
Accounts payable						4.1
Accrued expenses						5.4
Contingent liability (b)	0.8				0.8	2.3	$ 2.3
Deferred income taxes (a)						3.5
Noncurrent employee benefits						4.9
Long-term debt						1.8
Other noncurrent obligations						0.1
Total liabilities assumed						22.1
Net assets acquired						$ 48
Adjustment to inventory and fixed assets			$ 1.5
Adjustment to goodwill			$ 1.1
Separately recognized transactions	$ 2.4				2.4
Acquisition related adjustments					$ 3.9

Acquisitions - Summary of Profo

Acquisitions - Summary of Proforma Information Coldenhove Acquisition (Details) - W.A. Sanders Coldenhove Holding B.V. $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)$ / shares
Business Acquisition [Line Items]
Net sales	$ 1,019.8
Operating income	108.9
Net income	$ 83
Earnings per basic common share
Basic earnings (loss) per share (dollars per share) | $ / shares	$ 4.90
Earnings per diluted common share
Diluted earnings (loss) per share (dollars per share) | $ / shares	$ 4.84

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Changes in carrying value of goodwill (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, net, beginning balance	$ 85,300,000	$ 84,000,000	$ 85,300,000
Adjustment of goodwill acquired in the Coldenhove Acquisition			1,100,000
Impairment related to the Brattleboro mill and associated office and research facilities			(100,000)
Foreign currency translation		(900,000)	(2,300,000)
Realignment of Other segment		0
Goodwill, net, ending balance		$ 83,100,000	84,000,000	$ 85,300,000
Minimum
Goodwill [Line Items]
Intangible asset useful lives		10 years
Maximum
Goodwill [Line Items]
Intangible asset useful lives		15 years
Technical Products
Goodwill [Roll Forward]
Goodwill gross, beginning balance	128,300,000	$ 124,900,000	128,300,000
Accumulated Impairment Loss, beginning of period	(49,600,000)	(47,400,000)	(49,600,000)
Goodwill, net, beginning balance	78,700,000	77,500,000	78,700,000
Adjustment of goodwill acquired in the Coldenhove Acquisition			1,100,000
Foreign currency translation gross impact		(1,900,000)	(4,500,000)
Foreign currency translation, accumulated impairment losses impact		1,000,000	2,200,000
Foreign currency translation		(900,000)	(2,300,000)
Realignment of Other segment, gross impact		400,000
Realignment of Other segment, accumulated impairment		(100,000)
Realignment of Other segment		300,000
Goodwill gross, ending balance		123,400,000	124,900,000	128,300,000
Accumulated Impairment Loss, end of period		(46,500,000)	(47,400,000)	(49,600,000)
Goodwill, net, ending balance		76,900,000	77,500,000	78,700,000
Adjustment to goodwill			1,100,000
Fine Paper and Packaging
Goodwill [Roll Forward]
Goodwill gross, beginning balance	6,200,000	6,200,000	6,200,000
Goodwill, net, beginning balance	6,200,000	6,200,000	6,200,000
Goodwill gross, ending balance		6,200,000	6,200,000	6,200,000
Goodwill, net, ending balance		6,200,000	6,200,000	6,200,000
Other
Goodwill [Roll Forward]
Goodwill gross, beginning balance	400,000	400,000	400,000
Accumulated Impairment Loss, beginning of period		(100,000)
Goodwill, net, beginning balance	400,000	300,000	400,000
Impairment related to the Brattleboro mill and associated office and research facilities			(100,000)
Realignment of Other segment, gross impact		(400,000)
Realignment of Other segment, accumulated impairment		100,000
Realignment of Other segment		(300,000)
Goodwill gross, ending balance		0	400,000	400,000
Accumulated Impairment Loss, end of period		0	(100,000)
Goodwill, net, ending balance		0	300,000	400,000
Goodwill Other Than Brattleboro Mill
Goodwill [Roll Forward]
Impairment related to the Brattleboro mill and associated office and research facilities		$ 0	0	0
W.A. Sanders Coldenhove Holding B.V.
Goodwill [Roll Forward]
Goodwill, net, beginning balance	10,000,000		10,000,000
Goodwill, net, ending balance				$ 10,000,000
Adjustment to goodwill	$ 1,100,000
Brattleboro Mill and Associated Research and Office Facilities
Goodwill [Roll Forward]
Impairment related to the Brattleboro mill and associated office and research facilities			$ (100,000)

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Other intangible assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Net identifiable intangible assets	$ 66.7	$ 70.7
Amortizable intangible assets, gross amount	60.2	60.3
Accumulated Amortization	(31.1)	(27.4)
Total gross intangible assets	97.8	98.1
Aggregate amortization expense of acquired intangible assets	3.9	4.3	$ 3.7
Estimated annual amortization expense
2020	3.7
2021	3.5
2022	2.9
2023	2.7
2024	2.7
Trade names
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Non-amortizable, gross amount	37.6	37.8
Customer based intangibles
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Amortizable intangible assets, gross amount	38.2	38.3
Accumulated Amortization	(20.4)	(18.2)
Trade names and trademarks
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Amortizable intangible assets, gross amount	5.1	5.1
Accumulated Amortization	(2.7)	(2.5)
Acquired technology
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Amortizable intangible assets, gross amount	16.9	16.9
Accumulated Amortization	(8)	$ (6.7)
W.A. Sanders Coldenhove Holding B.V.
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Intangible assets-definite lived			4.7
Non-amortizable trade names			1.2
Total intangible assets			5.9
W.A. Sanders Coldenhove Holding B.V. | Customer based intangibles
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Intangible assets-definite lived			$ 2.9
Estimated Useful Lives (Years)			15 years
W.A. Sanders Coldenhove Holding B.V. | Trade names and trademarks
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Intangible assets-definite lived			$ 0.5
Estimated Useful Lives (Years)			10 years
W.A. Sanders Coldenhove Holding B.V. | Acquired technology
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Intangible assets-definite lived			$ 1.3
Estimated Useful Lives (Years)			4 years
Technical Products
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Net identifiable intangible assets	43.1
Fine Paper and Packaging
Finite Lived and Indefinite Live Intangible Assets by Major Class [Line Items]
Net identifiable intangible assets	$ 23.6

Income Taxes Income Taxes - Nar

Income Taxes Income Taxes - Narrative (Details) - USD ($)	12 Months Ended			13 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Jun. 30, 2017
Tax Credit Carryforward [Line Items]
Effective income tax rate (as a percent)	16.70%	9.50%	12.40%
Provisional income tax expense (benefit)			$ 6,500,000	$ 6,600,000
Change in tax rate effect on deferred taxes			10,300,000	11,200,000
Transition tax for accumulated foreign earnings, income tax expense (benefit)			3,800,000	$ 4,600,000
Measurement period tax benefit adjustment		$ 900,000
Measurement period adjustment to transition tax		800,000
Measurement period adjustment			8,100,000
Change in statutory tax rate, amount	$ 0	$ (1,600,000)	(9,700,000)
Deferred income tax benefit			1,600,000
Transition tax for accumulated foreign earnings			2,200,000
Retained Earnings
Tax Credit Carryforward [Line Items]
Reclassification of the unrealized loss on available-for-sale securities (Note 10)			10,900,000
Federal Ministry of Finance, Germany
Tax Credit Carryforward [Line Items]
Elimination of foreign earnings repatriated			4,100,000		$ 4,100,000
Change in statutory tax rate, amount			$ 600,000

Income Taxes - Effective Tax Ra

Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($)	3 Months Ended			12 Months Ended			13 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Jun. 30, 2017
Difference between the effective income tax provision rate and the U.S. federal statutory income tax provision rate
U.S. federal statutory income tax rate (as a percent)				21.00%	21.00%	35.00%
U.S. state income taxes, net of federal income tax benefit (as a percent)				1.40%	(1.00%)	1.90%
Foreign tax rate differences (as a percent)				3.60%	6.80%	(3.40%)
Tax on foreign dividends (as a percent)				0.009	0.036	(0.003)
Foreign financing structure (as a percent)				(3.00%)	(5.10%)	(2.20%)
Change in statutory rates (as a percent)				0.00%	(3.90%)	(10.60%)
Research and development and other tax credits (as a percent)				(6.20%)	(10.50%)	(3.30%)
Excess tax benefits from stock compensation (as a percent)				(0.20%)	(2.90%)	(4.90%)
Uncertain income tax positions (as a percent)				(1.90%)	2.00%	0.80%
Other differences - net (as a percent)				1.10%	(0.50%)	(0.60%)
Effective income tax rate (as a percent)				16.70%	9.50%	12.40%
Difference between the effective income tax provision and the U.S. federal statutory income tax provision
U.S. federal statutory income tax rate				$ 14,000,000	$ 8,600,000	$ 32,100,000
U.S. state income taxes, net of federal income tax benefit				900,000	(400,000)	1,700,000
Foreign tax rate differences				2,400,000	2,800,000	(3,100,000)
Tax on foreign dividends				600,000	1,500,000	(300,000)
Foreign financing structure				(2,000,000)	(2,100,000)	(2,000,000)
Change in statutory tax rate, amount				0	1,600,000	9,700,000
Research and development and other tax credits				(4,100,000)	(4,300,000)	(3,000,000)
Excess tax benefits from stock compensation				(100,000)	(1,200,000)	(4,500,000)
Uncertain income tax positions				(1,300,000)	800,000	700,000
Other differences, net				700,000	(200,000)	(500,000)
Total provision for income taxes				11,100,000	3,900,000	11,400,000
Transition tax for accumulated foreign earnings, income tax expense (benefit)						3,800,000	$ 4,600,000
Measurement period adjustment to transition tax					800,000
Change in tax rate effect on deferred taxes						10,300,000	$ 11,200,000
Measurement period tax benefit adjustment					(900,000)
Impairment loss	$ (2,900,000)	$ 2,000,000	$ 32,000,000	$ 0	31,100,000	0
Federal Ministry of Finance, Germany
Difference between the effective income tax provision and the U.S. federal statutory income tax provision
Change in statutory tax rate, amount						(600,000)
Interest limitation						$ 4,100,000		$ 4,100,000
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Brattleboro Mill and Associated Research and Office Facilities
Difference between the effective income tax provision and the U.S. federal statutory income tax provision
Impairment loss					31,100,000
Netherlands
Difference between the effective income tax provision and the U.S. federal statutory income tax provision
Change in statutory tax rate, amount	$ 700,000				$ 700,000

Income Taxes - U.S. and Foreign

Income Taxes - U.S. and Foreign Components (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income (loss) from continuing operations before income taxes:
U.S.	$ 30.1	$ (1.7)	$ 53.6
Foreign	36.4	42.8	38.1
Total	66.5	41.1	91.7
Current:
Federal	0.3	(3)	4.7
State	(0.2)	0.1	0.5
Foreign	7.6	8.7	6.4
Total current income tax provision	7.7	5.8	11.6
Deferred:
Federal	3	(0.6)	(1.8)
State	0.8	(0.2)	(0.1)
Foreign	(0.4)	(1.1)	1.7
Total deferred income tax provision	3.4	(1.9)	(0.2)
Total provision for income taxes	$ 11.1	$ 3.9	$ 11.4

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Asset/Liability (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018
Deferred income tax assets (liabilities)
Net deferred income tax assets	$ 13.4	$ 16.4
Deferred income tax assets (liabilities)
Net deferred income tax liabilities	(12.9)	(14.4)
Retained earnings	268.1	243.2
Undistributed earnings of foreign subsidiaries	48.8	58.4
NOLs
Deferred tax asset related to net operating losses	2.7
Pre-acquisition built-in loss carryforward	7.6
Pre-acquisition built-in carryovers, deferred tax asset	1.6
Alternative minimum tax credit carryovers	0.7
Domestic Tax Authority
Deferred income tax assets (liabilities)
Research and development tax credits	21.5	20
Employee benefits	15.9	16.5
Net operating losses and other tax credits	6.4	7.4
Lease liabilities	3.1
Accrued liabilities	2.1	2.3
Interest limitation	0	1.7
Inventories		1
Other	0.5	0.5
Net deferred income tax assets	13.4	16.4
Deferred income tax assets (liabilities)
Accelerated depreciation	(28)	(28.8)
Intangibles	(4.7)	(4.2)
Inventories	(0.6)
Lease right-of-use assets	(2.8)
State and Local Jurisdiction
NOLs
Net operating losses	44.1
Operating loss carryfowards, valuation allowance	0.5	0.5
Foreign Tax Authority
Deferred income tax assets (liabilities)
Employee benefits	7.5	6.3
Lease liabilities	0.7
Deferred income tax assets (liabilities)
Accelerated depreciation	(16.7)	(16.6)
Intangibles	(3)	(3.2)
Inventories	(0.9)	(1)
Lease right-of-use assets	(0.7)
Net operating losses	0.2	0.2
Other	0	(0.1)
Net deferred income tax liabilities	(12.9)	$ (14.4)
Research Tax Credit Carryforward | Domestic Tax Authority
NOLs
R & D credits subject to expiration	21
Research Tax Credit Carryforward | State and Local Jurisdiction
NOLs
R & D credits subject to expiration	$ 7.5
Accounting Standards Update 2016-06 | Domestic Tax Authority
Deferred income tax assets (liabilities)
Deferred income tax assets			$ 2.9
Retained earnings			2.9
Accounting Standards Update 2016-06 | Federal Ministry of Finance, Germany
Deferred income tax assets (liabilities)
Prepaid Taxes			3.7
Retained earnings			$ (3.7)

Income Taxes - Uncertain Tax Po

Income Taxes - Uncertain Tax Positions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of the total amounts of uncertain tax positions
Balance at January 1,	$ 10.1	$ 10	$ 10.3
Increases in prior period tax positions	0.7	0.1	0.4
Decreases in prior period tax positions	(1.2)	0	(1)
Increases in current period tax positions	0.6	0.8	0.7
Decreases due to lapse of statutes of limitations	(1.5)	(0.6)	(1)
Increases due to change in tax rates	0	0.1	0.4
Decreases due to settlements with tax authorities	(0.9)	(0.2)	0
Increases from foreign exchange rate changes	0		0.2
Decreases from foreign exchange rate changes		(0.1)
Balance at December 31,	7.8	10.1	10
Benefit for uncertain tax positions, if recognized	7.8
Accrued for interest and penalties related to uncertain income tax positions	0.1	0.1
Deferred Tax Asset
Reconciliation of the total amounts of uncertain tax positions
Balance at January 1,	7.9	2.3
Balance at December 31,	7.3	7.9	2.3
Deferred Tax Liability
Reconciliation of the total amounts of uncertain tax positions
Balance at January 1,	2.2	5.3
Balance at December 31,		2.2	5.3
Other Noncurrent Liabilities
Reconciliation of the total amounts of uncertain tax positions
Balance at January 1,		2.4
Balance at December 31,	0.5		$ 2.4
Foreign Tax Authority
Reconciliation of the total amounts of uncertain tax positions
Foreign tax credits set to expire	$ 5.2	$ 2.2

Debt - Summary of Long Term Deb

Debt - Summary of Long Term Debt (Details) € in Millions, $ in Millions	Dec. 31, 2019USD ($)	Dec. 31, 2019EUR (€)	Dec. 31, 2018USD ($)	Sep. 30, 2018	May 31, 2013
Debt Instrument [Line Items]
Total debt	$ 200.8		$ 239.1
Deferred financing costs	(3)		(3.5)
Less: Debt payable within one year	2.6		2.3
Long-term debt	$ 198.2		236.8
Senior notes | 2021 Senior Notes (5.25% fixed rate) due May 2021
Debt Instrument [Line Items]
Fixed rate of interest (as a percent)	5.25%	5.25%			5.25%
Total debt	$ 175		175
Secured debt | Global Revolving Credit Facilities (variable rates) due December 2023
Debt Instrument [Line Items]
Total debt	$ 21.6		57.9
Secured debt | Second German Loan Agreement (2.45% fixed rate) due in quarterly installments ending September 2022
Debt Instrument [Line Items]
Fixed rate of interest (as a percent)	2.45%	2.45%
Total debt	$ 3.5	€ 3.1	4.8
Secured debt | Third German Loan Agreement (1.45% fixed rate)
Debt Instrument [Line Items]
Fixed rate of interest (as a percent)	1.45%	1.45%		1.45%
Total debt	$ 3.7	€ 3.3	$ 4.9

Debt - Narrative (Details)

Debt - Narrative (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	May 31, 2013USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2019USD ($)installment	Dec. 31, 2017USD ($)	Dec. 31, 2019EUR (€)installment	Sep. 30, 2018	May 31, 2018EUR (€)	Jan. 31, 2013EUR (€)
Amended and Restated Secured Revolving Credit Facility
Total debt		$ 239,100,000	$ 200,800,000
U.S Revolving Credit Facility | Letter of Credit
Amended and Restated Secured Revolving Credit Facility
Maximum borrowing capacity			20,000,000
German Revolving Credit Facility | Letter of Credit
Amended and Restated Secured Revolving Credit Facility
Maximum borrowing capacity			$ 5,000,000
Global Revolving Credit Facilities (variable rates) due December 2023
Amended and Restated Secured Revolving Credit Facility
Proceeds from borrowings				$ 293,000,000
Global Revolving Credit Facilities (variable rates) due December 2023 | W.A. Sanders Coldenhove Holding B.V.
Amended and Restated Secured Revolving Credit Facility
Proceeds from borrowings				$ 31,000,000
Senior notes | 2021 Senior Notes (5.25% fixed rate) due May 2021
2021 Senior Notes
Total term of notes	8 years
Face amount	$ 175,000,000
Fixed rate of interest (as a percent)	5.25%		5.25%		5.25%
Maximum cash dividends allowed to be paid			$ 25,000,000
Net leverage ratio, threshold in which dividends can be issued and shares may be repurchased without limitation			2.5
Amended and Restated Secured Revolving Credit Facility
Total debt		$ 175,000,000	$ 175,000,000
Senior notes | 2014 Senior Notes (7.375% fixed rate) retired June 2013
2021 Senior Notes
Total term of notes	10 years
Fixed rate of interest (as a percent)	7.375%
Amount of debt redeemed or repaid	$ 70,000,000
Secured debt | Letter of Credit
Amended and Restated Secured Revolving Credit Facility
Total debt outstanding			500,000
Secured debt | Revolving bank credit facility (variable rates) due November 2017
2021 Senior Notes
Amount of debt redeemed or repaid	$ 56,000,000
Secured debt | U.S Revolving Credit Facility
Amended and Restated Secured Revolving Credit Facility
Maximum borrowing capacity			150,000,000
Secured debt | German Revolving Credit Facility
Amended and Restated Secured Revolving Credit Facility
Maximum borrowing capacity			75,000,000
Secured debt | Global Revolving Credit Facilities (variable rates) due December 2023
Amended and Restated Secured Revolving Credit Facility
Maximum borrowing capacity			350,000,000
Maximum borrowing capacity that may be increased			$ 125,000,000
Facility fee on unused amount of Revolver commitment (as a percent)			0.25%
Fixed charge coverage ratio required			1.1
Period to be maintained for stock repurchase or dividend payment			60 days
Period to be maintained for available borrowing capacity			60 days
Borrowing availability to determine stock repurchases and dividend payments			$ 25,000,000
Percentage of aggregate commitments to determine the stock repurchases and dividend payments			12.50%
Total debt outstanding			$ 21,600,000
Available credit			$ 173,500,000
Weighted-average interest rate (as a percent)		2.90%	1.30%		1.30%
Total debt		$ 57,900,000	$ 21,600,000
Secured debt | Global Revolving Credit Facilities (variable rates) due December 2023 | Minimum
Amended and Restated Secured Revolving Credit Facility
Reference rate			0.00%
Borrowing availability for not achieving the fixed charge coverage ratio			$ 35,000,000
Percentage of aggregate commitments for not maintaining fixed charge coverage ratio			17.50%
Secured debt | Global Revolving Credit Facilities (variable rates) due December 2023 | Maximum
Amended and Restated Secured Revolving Credit Facility
Borrowing availability for not achieving the fixed charge coverage ratio			$ 20,000,000
Percentage of aggregate commitments for not maintaining fixed charge coverage ratio			10.00%
Secured debt | Fourth Amended and Restated Credit Agreement
Amended and Restated Secured Revolving Credit Facility
Borrowing availability to determine stock repurchases and dividend payments			$ 28,000,000
Percentage of aggregate commitments to determine the stock repurchases and dividend payments			12.50%
Secured debt | Fourth Amended and Restated Credit Agreement | Minimum
Amended and Restated Secured Revolving Credit Facility
Borrowing availability to determine stock repurchases and dividend payments			$ 25,000,000
Secured debt | Second German Loan Agreement (2.45% fixed rate) due in quarterly installments ending September 2022
2021 Senior Notes
Fixed rate of interest (as a percent)			2.45%		2.45%
Amended and Restated Secured Revolving Credit Facility
Maximum borrowing capacity | €								€ 9,000,000
Interest rate on amounts outstanding (as a percent)			2.45%		2.45%
Total debt		4,800,000	$ 3,500,000		€ 3,100,000
Secured debt | Third German Loan Agreement (1.45% fixed rate)
2021 Senior Notes
Face amount | €							€ 5,000,000
Fixed rate of interest (as a percent)			1.45%		1.45%	1.45%
Amended and Restated Secured Revolving Credit Facility
Total debt		4,900,000	$ 3,700,000		€ 3,300,000
Number of quarterly installments | installment			13		13
Proceeds from German government subsidy		$ 900,000
LIBOR | U.S Revolving Credit Facility | Minimum
Amended and Restated Secured Revolving Credit Facility
Debt instrument basis spread on variable rate (as a percent)			0.00%
LIBOR | U.S Revolving Credit Facility | Maximum
Amended and Restated Secured Revolving Credit Facility
Debt instrument basis spread on variable rate (as a percent)			0.25%
LIBOR | German Revolving Credit Facility | Minimum
Amended and Restated Secured Revolving Credit Facility
Debt instrument basis spread on variable rate (as a percent)			1.25%
LIBOR | German Revolving Credit Facility | Maximum
Amended and Restated Secured Revolving Credit Facility
Debt instrument basis spread on variable rate (as a percent)			1.75%
LIBOR | Secured debt | German Revolving Credit Facility | Minimum
Amended and Restated Secured Revolving Credit Facility
Debt instrument basis spread on variable rate (as a percent)			1.25%
LIBOR | Secured debt | German Revolving Credit Facility | Maximum
Amended and Restated Secured Revolving Credit Facility
Debt instrument basis spread on variable rate (as a percent)			1.75%

Debt - Summary of Variable Rate

Debt - Summary of Variable Rates (Details)	12 Months Ended
	Dec. 31, 2019
Prime rate | U.S Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Debt instrument basis spread on variable rate (as a percent)	0.00%
Prime rate | U.S Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Debt instrument basis spread on variable rate (as a percent)	0.25%
Federal funds rate | U.S Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Debt instrument basis spread on variable rate (as a percent)	0.00%
Federal funds rate | U.S Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Debt instrument basis spread on variable rate (as a percent)	0.25%
LIBOR | U.S Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Debt instrument basis spread on variable rate (as a percent)	0.00%
LIBOR | U.S Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Debt instrument basis spread on variable rate (as a percent)	0.25%
LIBOR | German Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Debt instrument basis spread on variable rate (as a percent)	1.25%
LIBOR | German Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Debt instrument basis spread on variable rate (as a percent)	1.75%

Debt - Principal Payments (Deta

Debt - Principal Payments (Details) $ in Millions	Dec. 31, 2019USD ($)
Debt payments
2020	$ 2.6
2021	177.8
2022	1.8
2023	21.6
2024	0
Thereafter	0
Total	$ 203.8

Pension and Other Postretirem_3

Pension and Other Postretirement Benefits - Narrative (Details)	1 Months Ended			3 Months Ended	12 Months Ended
	Nov. 30, 2019employee	Dec. 31, 2018USD ($)employee	Jun. 30, 2018USD ($)	Dec. 31, 2019USD ($)person	Dec. 31, 2019USD ($)person	Dec. 31, 2018USD ($)employee	Dec. 31, 2017USD ($)	Oct. 31, 2019USD ($)
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain				$ 1,600,000
Number of hourly employees | employee	30	375				375
Number of regular full-time employees	115	690		2,324	2,324	690
Threshold period of service for participation in new pension plan	25 years	25 years
Aggregate contributions to qualified and non-qualified pension trusts and payments of pension benefits for unfunded pension plans				$ 9,000,000	$ 9,000,000
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Pension curtailment (gain)/settlement charge, net of plan payments (Note 8)					100,000	$ 800,000	$ 600,000
Payment for pension and other postretirement benefits					500,000	2,200,000	1,300,000
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension curtailment (gain)/settlement charge, net of plan payments (Note 8)							600,000
Assets for plan benefits, defined benefit plan				2,000,000	2,000,000
Curtailment gain					1,600,000	$ 0	$ 0
Estimated net actuarial loss				5,300,000	5,300,000
Estimated prior service cost (credit)				300,000	$ 300,000
Expected long-term return on plan assets (as a percent)					5.91%	5.78%	6.31%
Amount of plan assets invested in the entity's securities		$ 0		0	$ 0	$ 0	$ 0
Pension Benefits | Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets (as a percent)					6.00%
Pension Benefits | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets (as a percent)					5.00%
Postretirement Benefits Other than Pensions
Defined Benefit Plan Disclosure [Line Items]
Pension curtailment (gain)/settlement charge, net of plan payments (Note 8)					$ 0	0	0
Curtailment gain					0	$ 0	$ 0
Estimated net actuarial loss				600,000	600,000
Estimated prior service cost (credit)				0	$ 0
Expected long-term return on plan assets (as a percent)					0.00%	0.00%	0.00%
Defined contribution retirement plans
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost					$ 2,000,000	$ 2,300,000	$ 2,500,000
Supplemental retirement contribution plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost					400,000	0	400,000
Unfunded obligation		$ 1,700,000		$ 1,700,000	1,700,000	1,700,000
Voluntary contribution investment plans
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost					$ 4,700,000	4,000,000	$ 3,700,000
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				33.00%	33.00%
Equity securities | Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets (as a percent)					10.00%
Equity securities | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets (as a percent)					8.00%
Equity securities | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				33.00%	33.00%
Equity securities | Pension Benefits | Maximum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				38.00%	38.00%
Equity securities | Pension Benefits | Minimum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				28.00%	28.00%
Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				8.00%	8.00%
Hedge Funds | Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets (as a percent)					7.00%
Hedge Funds | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets (as a percent)					5.00%
Hedge Funds | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				8.00%	8.00%
Hedge Funds | Pension Benefits | Maximum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				13.00%	13.00%
Hedge Funds | Pension Benefits | Minimum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				3.00%	3.00%
U.S. and Non-U.S. Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				59.00%	59.00%
U.S. and Non-U.S. Fixed Income Securities | Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets (as a percent)					5.00%
U.S. and Non-U.S. Fixed Income Securities | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets (as a percent)					3.00%
U.S. and Non-U.S. Fixed Income Securities | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				59.00%	59.00%
U.S. and Non-U.S. Fixed Income Securities | Pension Benefits | Maximum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				64.00%	64.00%
U.S. and Non-U.S. Fixed Income Securities | Pension Benefits | Minimum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation (as a percent)				54.00%	54.00%
Prepaid Expenses and Other Current Assets | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Assets for plan benefits, defined benefit plan				$ 1,400,000	$ 1,400,000
Other assets | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Assets for plan benefits, defined benefit plan				600,000	600,000
Level 1 | Other assets | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of marketable securities				4,000,000	4,000,000
Pace Industry Union-Management Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Multiemployer plans withdrawal obligation			$ 1,000,000					$ 1,000,000
Multiemployer plans minimum contribution			$ 100,000
Multiemployer plans minimum contribution period			20 years
Multiemployer plans accumulated funding deficiency demand								$ 1,300,000
Multiemployer pension plan expense						$ 100,000
Pace Industry Union-Management Pension Fund | Maximum
Defined Benefit Plan Disclosure [Line Items]
Matching contribution (as a percent)						5.00%
Measurement Input, Risk Free Interest Rate | Pace Industry Union-Management Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Multiemployer plans withdrawal obligation measurement input			0.057
Netherlands | Dutch Defined Benefit Plan | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain				$ 1,600,000	$ 1,600,000

Pension and Other Postretirem_4

Pension and Other Postretirement Benefits - Benefit Plan Obligations, Plan Assets, Funded Status, and Net Liability Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Change in Benefit Obligation:
Plan curtailment	$ (0.1)
Amounts recognized in statement of financial position consist of:
Noncurrent liabilities					$ (93.1)	$ (92.9)
Curtailment gain	1.6
Pension Benefits
Change in Benefit Obligation:
Benefit obligation at beginning of year		$ 430.7	$ 463.9
Service cost		5	6.7	$ 5.5
Interest cost		16.2	15.8	15
Currency		(1.2)	(4.6)
Actuarial (gain) loss		55	(29.3)
Benefit payments from plans		(21.1)	(20.3)
Plan curtailment		(2.8)	0
Settlement payments		(0.5)	(2.2)
Other		1.1	0.7
Benefit obligation at end of year	482.4	482.4	430.7	463.9
Change in Plan Assets:
Fair value of plan assets at beginning of year		375.2	400.4
Actual gain (loss) on plan assets		62.1	(18.9)
Employer contributions		8.3	18.2
Currency		(0.5)	(2.7)
Benefit payments		(21.1)	(20.3)
Settlement payments		(0.5)	(2.2)
Other		0.6	0.7
Fair value of plan assets at end of year	424.1	424.1	375.2	400.4
Reconciliation of Funded Status
Fair value of plan assets	424.1	424.1	400.4	400.4	424.1	375.2
Projected benefit obligation	482.4	430.7	430.7	463.9	482.4	430.7
Net liability recognized in statement of financial position					(58.3)	(55.5)
Amounts recognized in statement of financial position consist of:
Current liabilities					(1.2)	(1.7)
Noncurrent liabilities					(57.1)	(53.8)
Net amount recognized					(58.3)	(55.5)
Curtailment gain		1.6	0	0
Postretirement Benefits Other than Pensions
Change in Benefit Obligation:
Benefit obligation at beginning of year		42.4	44
Service cost		1.2	1.1	1.2
Interest cost		1.5	1.4	1.4
Currency		0.1	(0.3)
Actuarial (gain) loss		(0.7)	1.1
Benefit payments from plans		(4.8)	(4.9)
Plan curtailment		0	0
Settlement payments		0	0
Other		0	0
Benefit obligation at end of year	39.7	39.7	42.4	44
Change in Plan Assets:
Fair value of plan assets at beginning of year		0	0
Actual gain (loss) on plan assets		0	0
Employer contributions		0	0
Currency		0	0
Benefit payments		0	0
Settlement payments		0	0
Other		0	0
Fair value of plan assets at end of year	0	0	0	0
Reconciliation of Funded Status
Fair value of plan assets	0	0	0	0	0	0
Projected benefit obligation	39.7	42.4	42.4	44	39.7	42.4
Net liability recognized in statement of financial position					(39.7)	(42.4)
Amounts recognized in statement of financial position consist of:
Current liabilities					(5.6)	(5.2)
Noncurrent liabilities					(34.1)	(37.2)
Net amount recognized					$ (39.7)	$ (42.4)
Curtailment gain		0	$ 0	0
Level 3 | Insurance Contracts Acquired in Business Combination | W.A. Sanders Coldenhove Holding B.V.
Amounts recognized in statement of financial position consist of:
Net Purchases/ (Settlements)				$ 46.8
Netherlands | Dutch Defined Benefit Plan | Pension Benefits
Amounts recognized in statement of financial position consist of:
Curtailment gain	$ 1.6	$ 1.6

Pension and Other Postretirem_5

Pension and Other Postretirement Benefits - Amounts Recognized in AOCI and Disaggregated Information (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Total recognized in AOCI	$ 94.3	$ 89.6
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated actuarial loss	117.8	110.1
Prior service cost	0.9	0.7
Total recognized in AOCI	118.7	110.8
Assets Exceed ABO
Projected benefit obligation	0	130.3
Accumulated benefit obligation	0	125.4
Fair value of plan assets	0	128.8
ABO Exceed Assets
Projected benefit obligation	482.4	300.4
Accumulated benefit obligation	478.3	298.5
Fair value of plan assets	424.1	246.4
Total
Projected benefit obligation	482.4	430.7	$ 463.9
Accumulated benefit obligation	478.3	423.9
Fair value of plan assets	424.1	375.2	400.4
Postretirement Benefits Other than Pensions
Defined Benefit Plan Disclosure [Line Items]
Accumulated actuarial loss	7.2	8.7
Prior service cost	0	0
Total recognized in AOCI	7.2	8.7
Total
Projected benefit obligation	39.7	42.4	44
Fair value of plan assets	$ 0	$ 0	$ 0

Pension and Other Postretirem_6

Pension and Other Postretirement Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	$ (1.6)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 5	$ 6.7	$ 5.5
Interest cost		16.2	15.8	15
Expected return on plan assets		(21.1)	(21)	(19.9)
Recognized net actuarial loss		4.9	5.2	5.6
Amortization of prior service cost (credit)		0.2	0.2	0.2
Curtailment gain		(1.6)	0	0
Amount of settlement loss recognized				0.6
Net periodic benefit cost		3.7	7.7	7
Postretirement Benefits Other than Pensions
Defined Benefit Plan Disclosure [Line Items]
Service cost		1.2	1.1	1.2
Interest cost		1.5	1.4	1.4
Expected return on plan assets		0	0	0
Recognized net actuarial loss		0.9	0.8	0.3
Amortization of prior service cost (credit)		0	(0.2)	(0.2)
Curtailment gain		0	0	0
Amount of settlement loss recognized		0	0	0
Net periodic benefit cost		$ 3.6	$ 3.1	$ 2.7

Pension and Other Postretirem_7

Pension and Other Postretirement Benefits - Other Changes in Plan Assets and Benefit Obligations Recognized in OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit expense	$ 3.7	$ 7.7	$ 7
Accumulated actuarial gain (loss)	7.7	4.2	10.1
Prior service cost (credit)	0.2	(0.1)	(0.1)
Total recognized in other comprehensive income (loss)	7.9	4.1	10
Total recognized in net periodic benefit cost and other comprehensive income (loss)	11.6	11.8	17
Postretirement Benefits Other than Pensions
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit expense	3.6	3.1	2.7
Accumulated actuarial gain (loss)	(1.5)	0.1	3.7
Prior service cost (credit)	0	0.2	0.2
Total recognized in other comprehensive income (loss)	(1.5)	0.3	3.9
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$ 2.1	$ 3.4	$ 6.6

Pension and Other Postretirem_8

Pension and Other Postretirement Benefits - Weighted-Average Assumptions Used to Determine Benefit Obligations (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.98%	3.94%
Rate of compensation increase	2.05%	2.34%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.78%	3.65%	4.18%
Expected long-term return on plan assets	5.91%	5.78%	6.31%
Rate of compensation increase	2.33%	2.44%	2.49%
Postretirement Benefits Other than Pensions
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.68%	3.84%
Rate of compensation increase	0.00%	0.00%
Initial healthcare cost trend rate	6.10%	6.80%
Ultimate healthcare cost trend rate	4.50%	4.50%	4.50%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.84%	3.42%	3.89%
Expected long-term return on plan assets	0.00%	0.00%	0.00%
Rate of compensation increase	2.50%	2.50%	0.00%
Initial healthcare cost trend rate	6.50%	6.80%	7.00%
Ultimate healthcare cost trend rate	4.50%	4.50%	4.50%

Pension and Other Postretirem_9

Pension and Other Postretirement Benefits - Pension Plan Assets Allocation (Details)	Dec. 31, 2019	Dec. 31, 2018
Equity securities
Target investment allocation and permissible allocation range for plan assets
Strategic Target	33.00%
Hedge Funds
Target investment allocation and permissible allocation range for plan assets
Strategic Target	8.00%
Debt securities / Fixed Income
Target investment allocation and permissible allocation range for plan assets
Strategic Target	59.00%
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	100.00%	100.00%
Pension Benefits | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	33.00%	33.00%
Target investment allocation and permissible allocation range for plan assets
Strategic Target	33.00%
Pension Benefits | Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	8.00%	8.00%
Target investment allocation and permissible allocation range for plan assets
Strategic Target	8.00%
Pension Benefits | Debt securities / Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	59.00%	58.00%
Target investment allocation and permissible allocation range for plan assets
Strategic Target	59.00%
Pension Benefits | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	0.00%	1.00%
Minimum | Pension Benefits | Equity securities
Target investment allocation and permissible allocation range for plan assets
Strategic Target	28.00%
Minimum | Pension Benefits | Hedge Funds
Target investment allocation and permissible allocation range for plan assets
Strategic Target	3.00%
Minimum | Pension Benefits | Debt securities / Fixed Income
Target investment allocation and permissible allocation range for plan assets
Strategic Target	54.00%
Maximum | Pension Benefits | Equity securities
Target investment allocation and permissible allocation range for plan assets
Strategic Target	38.00%
Maximum | Pension Benefits | Hedge Funds
Target investment allocation and permissible allocation range for plan assets
Strategic Target	13.00%
Maximum | Pension Benefits | Debt securities / Fixed Income
Target investment allocation and permissible allocation range for plan assets
Strategic Target	64.00%

Pension and Other Postretire_10

Pension and Other Postretirement Benefits - Future Benefit Payments (Details) $ in Millions	Dec. 31, 2019USD ($)
Pension Benefits
Future service benefit payments
2020	$ 22.3
2021	27.1
2022	23.3
2023	24.2
2024	25
Years 2025-2029	129.3
Postretirement Benefits Other than Pensions
Future service benefit payments
2020	5.6
2021	5
2022	4.6
2023	4.2
2024	3.9
Years 2025-2029	$ 13.7

Pension and Other Postretire_11

Pension and Other Postretirement Benefits- Health Care Cost Trends (Details) - Postretirement Benefits Other than Pensions $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Defined Benefit Plan Disclosure [Line Items]
Effect on total of service and interest cost components, increase	$ 0
Effect on total of service and interest cost components, decrease	0
Effect on post-retirement benefit other than pension obligation, increase	0.2
Effect on post-retirement benefit other than pension obligation, decrease	$ (0.2)

Stock Compensation Plans - Omni

Stock Compensation Plans - Omnibus Plan (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2004
Stock Compensation Plans
Par value of shares of common stock (in dollars per share)	$ 0.01	$ 0.01
Stock-based compensation expense and related income tax benefits
Stock-based compensation expense	$ 5.6	$ 4	$ 6.4
Income tax benefit	(1.4)	(1)	(2.5)
Stock-based compensation, net of income tax benefit	4.2	3	3.9
Compensation costs related to equity awards and amounts recognized
Compensation expense recognized	$ (5.6)	(4)	$ (6.4)
Stock options awarded
Nonqualified stock options granted (in shares)	1,272
Per share weighted-average grant date fair value (in dollars per share)	$ 10.32
Number of Stock Options
Add: Options granted (in shares)	1,272
Stock Options
Stock Compensation Plans
Expiration period				10 years
Vesting period				3 years
Stock-based compensation expense and related income tax benefits
Stock-based compensation expense	$ 0.4
Compensation costs related to equity awards and amounts recognized
Unrecognized compensation cost at the beginning of the period	0.6
Grant date fair value current year grants	0
Compensation expense recognized	(0.4)
Unrecognized compensation cost at the end of the period	$ 0.2	0.6
Expected amortization period	1 year 1 month 6 days
Performance Shares and RSUs
Stock-based compensation expense and related income tax benefits
Stock-based compensation expense	$ 5.2
Compensation costs related to equity awards and amounts recognized
Unrecognized compensation cost at the beginning of the period	2.1
Grant date fair value current year grants	5.5
Compensation expense recognized	(5.2)
Unrecognized compensation cost at the end of the period	$ 2.4	$ 2.1
Expected amortization period	1 year 7 months 6 days
Options
Fair value assumptions
Expected term in years	5 years	5 years 8 months 12 days	5 years 9 months 18 days
Risk free interest rate (as a percent)	1.80%	2.50%	2.10%
Volatility (as a percent)	23.10%	21.50%	22.90%
Dividend yield (as a percent)	3.00%	3.00%	3.00%
Nonqualified stock options
Stock options awarded
Nonqualified stock options granted (in shares)	1,272	108,420	144,089
Per share weighted-average exercise price (in dollars per share)	$ 66.59	$ 93.22	$ 82.11
Per share weighted-average grant date fair value (in dollars per share)	$ 10.32	$ 15	$ 13.54
Number of Stock Options
Add: Options granted (in shares)	1,272	108,420	144,089
Weighted-Average Exercise Price
Add: Options granted (in dollars per share)	$ 66.59	$ 93.22	$ 82.11
RSUs | Non-employee members of the board of directors
Stock Compensation Plans
Vesting period	1 year
Omnibus Plan
Stock Compensation Plans
Shares of common stock reserved for future issuance				3,500,000
Par value of shares of common stock (in dollars per share)				$ 0.01
Stock options awarded
Nonqualified stock options granted (in shares)	1,272
Per share weighted-average exercise price (in dollars per share)	$ 66.59
Number of Stock Options
Options outstanding at the beginning of the period (in shares)	451,081
Add: Options granted (in shares)	1,272
Less: Options exercised (in shares)	34,073
Less: Options forfeited/cancelled (in shares)	1,732
Options outstanding at the end of the period (in shares)	416,548	451,081
Weighted-Average Exercise Price
Options outstanding at the beginning of the period (in dollars per share)	$ 67.46
Add: Options granted (in dollars per share)	66.59
Less: Options exercised (in dollars per share)	35.26
Less: Options forfeited/cancelled (in dollars per share)	71.89
Options outstanding at the end of the period (in dollars per share)	$ 70.08	$ 67.46
Omnibus Plan 2018
Stock Compensation Plans
Shares of common stock reserved for future issuance	1,091,000
Additional common stock reserved for issuance subject to shareholders approval (in shares)		800,000
Reduction in number of shares available for future issuance (in shares)	177,000

Stock Compensation Plans - Outs

Stock Compensation Plans - Outstanding and Exercisable Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Options Exercisable
Closing market price for common stock (in dollars per share)	$ 70.43
Intrinsic value, exercises in the period	$ 1.2	$ 5.2	$ 11.5
Stock Options
Options Vested or Expected to Vest
Number of Options (in shares)	416,548
Weighted- Average Remaining Contractual Life (Years)	6 years 3 months 18 days
Weighted-Average Exercise Price (in dollars per share)	$ 70.08
Aggregate Intrinsic Value	$ 3.9
Options Exercisable
Number of Options (in shares)	318,029
Weighted-Average Exercise Price (in dollars per share)	$ 64.36
Aggregate Intrinsic Value	$ 3.9
$13.38 — $22.44 | Stock Options
Exercise Price
Exercise price, low end of range (in dollars per share)	$ 13.38
Exercise price, high end of range (in dollars per share)	$ 22.44
Options Vested or Expected to Vest
Number of Options (in shares)	8,745
Weighted- Average Remaining Contractual Life (Years)	9 months 18 days
Weighted-Average Exercise Price (in dollars per share)	$ 18.72
Aggregate Intrinsic Value	$ 0.4
Options Exercisable
Number of Options (in shares)	8,745
Weighted-Average Exercise Price (in dollars per share)	$ 18.72
Aggregate Intrinsic Value	$ 0.4
$24.09 — $42.82 | Stock Options
Exercise Price
Exercise price, low end of range (in dollars per share)	$ 24.09
Exercise price, high end of range (in dollars per share)	$ 42.82
Options Vested or Expected to Vest
Number of Options (in shares)	56,380
Weighted- Average Remaining Contractual Life (Years)	3 years 3 months 18 days
Weighted-Average Exercise Price (in dollars per share)	$ 34.28
Aggregate Intrinsic Value	$ 2
Options Exercisable
Number of Options (in shares)	56,380
Weighted-Average Exercise Price (in dollars per share)	$ 34.28
Aggregate Intrinsic Value	$ 2
$48.19 — $74.20 | Stock Options
Exercise Price
Exercise price, low end of range (in dollars per share)	$ 48.19
Exercise price, high end of range (in dollars per share)	$ 74.20
Options Vested or Expected to Vest
Number of Options (in shares)	121,703
Weighted- Average Remaining Contractual Life (Years)	5 years 9 months 18 days
Weighted-Average Exercise Price (in dollars per share)	$ 58.45
Aggregate Intrinsic Value	$ 1.5
Options Exercisable
Number of Options (in shares)	120,347
Weighted-Average Exercise Price (in dollars per share)	$ 58.35
Aggregate Intrinsic Value	$ 1.5
$74.70 — $93.35 | Stock Options
Exercise Price
Exercise price, low end of range (in dollars per share)	$ 74.70
Exercise price, high end of range (in dollars per share)	$ 93.35
Options Vested or Expected to Vest
Number of Options (in shares)	229,720
Weighted- Average Remaining Contractual Life (Years)	7 years 6 months
Weighted-Average Exercise Price (in dollars per share)	$ 86.93
Aggregate Intrinsic Value	$ 0
Options Exercisable
Number of Options (in shares)	132,557
Weighted-Average Exercise Price (in dollars per share)	$ 85.35
Aggregate Intrinsic Value	$ 0

Stock Compensation Plans - Unve

Stock Compensation Plans - Unvested Stock Options and Activity (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)$ / sharesshares
Number of Stock Options
Outstanding at the beginning of the period (in shares)	210,178
Add: Options granted (in shares)	1,272
Less: Options vested (in shares)	111,615
Less: Options forfeited/cancelled (in shares)	1,316
Outstanding at the end of the period (in shares)	98,519
Weighted-Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 14.21
Add: Options granted (in dollars per share) | $ / shares	10.32
Less: Options vested (in dollars per share) | $ / shares	14.04
Less: options forfeited (in dollars per share) | $ / shares	13.73
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 14.41
Stock options.
Additional disclosures
Shares outstanding that vested and would have been exercisable had the participants reached retirement age (in shares)	61,000
Aggregate grant date fair value of options subject to accelerated vesting | $	$ 0.9
Aggregate grant date fair value of options vested, including options subject to accelerated vesting | $	1.6
Maximum | Stock options.
Additional disclosures
Accelerated compensation expense (in dollars) | $	$ 0.1

Stock Compensation Plans - Perf

Stock Compensation Plans - Performance Units/RSU (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Weighted-Average Grant Date Fair Value
Excess tax benefits from stock-based compensation recorded to APIC	$ 0.1	$ 1.2	$ 4.5
Performance units
Stock Compensation Plans
Granted (in shares)	49,730	40,747	41,883
Percentage of target to be awarded, high end of range	200.00%
Common stock earned as a percentage of the performance unit target	67.00%
Market price at grant date of performance units(in USD per share)	$ 69.05
Unvested stock-based awards (other than stock options)
Outstanding at the beginning of the period (in shares)	47,221	41,377	53,506
Shares granted (in shares)	49,730	40,747	41,883
Shares vested (in shares)	0	0	0
Performance Shares vested (in shares)	25,833	31,421	53,506
Shares expired or cancelled (in shares)	(4,927)	(3,482)	(506)
Outstanding at the end of the period (in shares)	66,191	47,221	41,377
Weighted-Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 93.21	$ 81.85	$ 73.79
Shares granted (in dollars per share)	69.05	93.21	81.85
Shares vested (in dollars per share)	0	0	0
Performance shares vested (in dollars per share)	93.21	81.85	73.79
Shares expired or cancelled (in dollars per share)	85.67	84.45	81.85
Outstanding at the end of the period (in dollars per share)	$ 75.62	$ 93.21	$ 81.85
RSUs
Stock Compensation Plans
Granted (in shares)	46,556	10,618	10,318
Unvested stock-based awards (other than stock options)
Outstanding at the beginning of the period (in shares)	53,460	88,799	80,719
Shares granted (in shares)	46,556	10,618	10,318
Shares vested (in shares)	(63,595)	(72,190)	(72,451)
Performance Shares vested (in shares)	10,354	33,928	73,838
Shares expired or cancelled (in shares)	(2,113)	(7,695)	(3,625)
Outstanding at the end of the period (in shares)	44,662	53,460	88,799
Weighted-Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 67.53	$ 53.33	$ 54.91
Shares granted (in dollars per share)	67.04	82.29	76.84
Shares vested (in dollars per share)	72.91	60.24	55.26
Performance shares vested (in dollars per share)	93.21	88.40	52.11
Shares expired or cancelled (in dollars per share)	69.35	84.45	50.48
Outstanding at the end of the period (in dollars per share)	$ 65.23	$ 67.53	$ 53.33
Units issued in lieu of dividends (in shares)	43	132	226
Aggregate pre-tax intrinsic value of outstanding RSUs	$ 3.1
Aggregate pre-tax intrinsic value of restricted stock and RSUs that vested during the period	$ 4.2	$ 4.4	$ 6.3
RSUs | Non-employee members of the board of directors
Stock Compensation Plans
Granted (in shares)	10,056
Market price at grant date of performance units(in USD per share)	$ 67.04
Vesting period	1 year
Unvested stock-based awards (other than stock options)
Shares granted (in shares)	10,056
RSUs | Employees
Stock Compensation Plans
Granted (in shares)	36,457
Unvested stock-based awards (other than stock options)
Shares granted (in shares)	36,457

Stockholders' Equity - (Details

Stockholders' Equity - (Details)	1 Months Ended	12 Months Ended
	Nov. 30, 2019USD ($)	Dec. 31, 2019USD ($)voteseries$ / sharesshares	Dec. 31, 2018USD ($)shares	Dec. 31, 2017USD ($)shares
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Authorized shares of common stock (in shares) | shares		100,000,000	100,000,000
Voting rights per common share | vote		1
Shares acquired by the entity (in shares) | shares		17,774	25,890	28,000
Cost of shares acquired by the entity | $		$ 1,300,000	$ 1,500,000	$ 2,500,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Authorized shares of preferred stock | shares		20,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.01
Minimum number of series of preferred stock to be issued | series		1
Number of preferred shares issued (in shares) | shares		0
2020 Stock Purchase Plan
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Stock repurchase program, period in force	12 months
2019 Stock Purchase Plan
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Authorized amount of repurchase under the stock purchase plan | $			$ 25,000,000
Common stock purchased under the stock purchase plan (in shares) | shares		79,676
Cost of shares of common stock acquired | $		$ 4,900,000
2018 Stock Purchase Plan
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Authorized amount of repurchase under the stock purchase plan | $		$ 25,000,000
Common stock purchased under the stock purchase plan (in shares) | shares			124,434
Cost of shares of common stock acquired | $			$ 9,300,000
2017 Stock Purchase Plan
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock purchased under the stock purchase plan (in shares) | shares				0
Cost of shares of common stock acquired | $				$ 0
2016 Stock Purchase Plan
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock purchased under the stock purchase plan (in shares) | shares				85,354
Cost of shares of common stock acquired | $				$ 6,800,000
Maximum | 2020 Stock Purchase Plan
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Authorized amount of repurchase under the stock purchase plan | $	$ 25,000,000

Stockholder's Equity - Schedule

Stockholder's Equity - Schedule of Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Stockholders' Equity Note [Abstract]
Net loss from pension and other postretirement benefit liabilities, net of income tax benefits of $31.6 million and $29.9 million, respectively	$ (94.3)	$ (89.6)
Unrealized foreign currency translation losses, net of income tax benefits of $0.3 and $0.3, respectively	(19)	(15.5)
AOCI	(113.3)	(105.1)
Foreign currency translation losses, tax benefit	0.3	0.3
Net loss from pension and other postretirement benefit liabilities, tax benefit	$ 31.6	$ 29.9

Stockholders' Equity - Changes

Stockholders' Equity - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax		$ (9.9)	$ (12.3)	$ 5.8
Other comprehensive income (loss), tax effect		1.7	1	3
Other comprehensive income (loss)		(8.2)	(11.3)	8.8
Cumulative effect of new accounting principle in period of adoption					$ 0.3
Available-for-sale securities adjustment tax effect					$ 0.1
Provision for income taxes		(11.1)	(3.9)	(11.4)
Unrealized foreign currency translation gains (losses)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax		(3.5)	(7.9)	20
Other comprehensive income (loss), tax effect		0	(0.1)	0
Other comprehensive income (loss)		(3.5)	(8)	20
Adjustment to pension and other benefit liabilities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax		(6.4)	(4.4)	(13.8)
Other comprehensive income (loss), tax effect		1.7	1.1	2.9
Other comprehensive income (loss)		(4.7)	(3.3)	(10.9)
Unrealized loss on available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax		0	0	(0.4)
Other comprehensive income (loss), tax effect		0	0	0.1
Other comprehensive income (loss)		0	0	(0.3)
Accounting Standards Update 2016-01
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification of the stranded tax effects related to the Tax Act	$ 10.9
Cost of Sales and Selling General and Administrative Expenses | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of products sold and selling, general, and admin expense		6	6	5.9
Provision for income taxes		1.5	1.5	2.3
Pension Plan Settlement Charge | Adjustment to pension and other benefit liabilities | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before tax		1.3	0.8	0.6
Reclassification from AOCI, tax		$ 0.3	$ 0.2	$ 0.2

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Lease right-of-use assets	$ 13.9
Operating lease liability	$ 14.9
Lease remaining term of contract	11 years
Operating cash flows from operating leases	$ 3.1
Right-of-use assets obtained in exchange for operating lease obligations	$ 0.4
Weighted average remaining lease term	8 years 1 month 6 days
Weighted average discount rate	4.90%
Rent expense under operating leases		$ 7.2	$ 6.8
Maximum
Lessee, Lease, Description [Line Items]
Lease extension term	5 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Lease right-of-use assets				$ 16
Operating lease liability				$ 17

Leases - Lease Costs and Assump

Leases - Lease Costs and Assumptions (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Leases [Abstract]
Operating lease cost	$ 3.1
Short-term lease cost	1.5
Variable lease cost	$ 2.1

Leases - Operating Lease Maturi

Leases - Operating Lease Maturity Schedule (Details) $ in Millions	Dec. 31, 2019USD ($)
Leases [Abstract]
2020	$ 2.8
2021	2.6
2022	2.3
2023	2
2024	1.7
Thereafter	7.4
Total lease payments	18.8
Less: Imputed interest	3.9
Total lease liabilities	$ 14.9

Commitments, Contingencies, a_3

Commitments, Contingencies, and Legal Matters (Details) $ in Millions	Dec. 31, 2019USD ($)employeeperson	Nov. 30, 2019employee	Dec. 31, 2018employee
Loss Contingencies [Line Items]
Number of regular full-time employees	2,324	115	690
Number of hourly employees | employee		30	375
2020 | $	$ 7.2
2021 | $	0.8
2022 | $	0.2
2023 | $	$ 0.2
United States
Loss Contingencies [Line Items]
Number of hourly employees	995
Number of salaried employees	513
Europe
Loss Contingencies [Line Items]
Number of hourly employees	385
Number of salaried employees	431
Whiting, WI | January 2021
Loss Contingencies [Line Items]
Number of regular full-time employees	203
Neenah, WI | June 2021
Loss Contingencies [Line Items]
Number of regular full-time employees	244
Munising, MI | July 2021
Loss Contingencies [Line Items]
Number of regular full-time employees	177
Appleton, WI | May 2022
Loss Contingencies [Line Items]
Number of regular full-time employees	89
Lowville, NY | November 2021
Loss Contingencies [Line Items]
Number of regular full-time employees	98
Workforce Subject to Collective Bargaining Arrangements Expiring within One Year
Loss Contingencies [Line Items]
Number of regular full-time employees | employee	0

Sale of Battleboro Mill and I_2

Sale of Battleboro Mill and Impairment Loss (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disposal Groups
Impairment loss	$ (2.9)	$ 2	$ 32	$ 0	$ 31.1	$ 0
Brattleboro Mill and Associated Research and Office Facilities | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Disposal Groups
Impairment loss					31.1
Cash proceeds from sale of mill	$ 5				5
Fine Paper and Packaging | Brattleboro Mill and Associated Research and Office Facilities | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Disposal Groups
Impairment loss					24.4
Technical Products | Brattleboro Mill and Associated Research and Office Facilities | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Disposal Groups
Impairment loss					1.1
Other | Brattleboro Mill and Associated Research and Office Facilities | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Disposal Groups
Impairment loss					$ 5.6

Business Segment and Geograph_3

Business Segment and Geographic Information - Segment Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business segment
Net sales									$ 938.5	$ 1,034.9	$ 979.9
Total Assets	$ 827.8				$ 861.2				827.8	861.2
Depreciation and amortization									38.9	36.1	33.3
Capital expenditures									21.4	38.1	42.7
Operating income (loss)	22.1	$ 19	$ 19.8	$ 17.4	17.8	$ 16.5	$ (4.3)	$ 24.1	78.3	54.1	104.3
Curtailment gain	1.6
Acquisition related adjustments					0.8	(3.1)			0	(3.9)	0
Insurance recoveries						0.4			0	0.4	3.2
Pension plan settlement charge		0.1					1				0.6
Long-Lived Assets	575.1				583.3				575.1	583.3
United States
Business segment
Long-Lived Assets	364.2				366.3				364.2	366.3
Germany
Business segment
Long-Lived Assets	153.3				157.9				153.3	157.9
Rest of Europe
Business segment
Long-Lived Assets	57.6				59.1				57.6	59.1
Pension Benefits
Business segment
Curtailment gain									1.6	0	0
Unallocated corporate costs
Business segment
Total Assets	36.3				27.2				36.3	27.2
Depreciation and amortization									1.6	1.6	1.7
Capital expenditures									0.6	1.4	0.5
Operating income (loss)									(19.5)	(19.8)	(20.1)
Pre-operating costs related to conversion of fine paper machine to filtration												$ 2.7
Unallocated corporate costs | Supplemental Employee Retirement Plan
Business segment
Integration costs											1.3
Restructuring costs and pension settlement charges									0.3	1.9
Product
Business segment
Net sales	213.6	$ 231.8	$ 253.4	$ 239.7	240.9	$ 256.2	$ 271.3	$ 266.5	938.5	1,034.9	979.9
Product | United States
Business segment
Net sales									673	744.4	748.9
Product | Germany
Business segment
Net sales									196.3	216.5	210.3
Product | Rest of Europe
Business segment
Net sales									69.2	74	20.7
Technical Products | Operating Segments
Business segment
Total Assets	573.8				599.3				573.8	599.3
Depreciation and amortization									24.1	24.4	20.3
Capital expenditures									13.1	28	29.7
Operating income (loss)									44.6	50.9	55.3
Non-routine costs									0.3
Non-cash impairment loss, restructuring, integration and pension settlement charges									2.5
Acquisition related adjustments									3.9
Technical Products | Product | Operating Segments
Business segment
Net sales									$ 541.6	$ 583.2	$ 518.6
Technical Products | Product Concentration Risk | Sales
Business segment
Percentage of concentration risk									100.00%	100.00%	100.00%
Technical Products | Product Concentration Risk | Filtration | Sales
Business segment
Percentage of concentration risk									42.00%	40.00%	42.00%
Technical Products | Product Concentration Risk | Backings | Sales
Business segment
Percentage of concentration risk									24.00%	28.00%	31.00%
Technical Products | Product Concentration Risk | Specialty | Sales
Business segment
Percentage of concentration risk									34.00%	32.00%	27.00%
Fine Paper and Packaging | Operating Segments
Business segment
Total Assets	$ 217.7				234.7				$ 217.7	$ 234.7
Depreciation and amortization									13.2	9.9	$ 11
Capital expenditures									7.7	8.7	12.5
Operating income (loss)									53.2	29.4	69.5
Non-routine costs									5.7
Non-cash impairment loss, restructuring costs, and pension settlement charges										24.6
Insurance recoveries										0.3	2.9
Integration costs												1.8
Fine Paper and Packaging | Product | Operating Segments
Business segment
Net sales									$ 396.9	$ 445.8	$ 455.3
Fine Paper and Packaging | Product Concentration Risk | Sales
Business segment
Percentage of concentration risk									100.00%	100.00%	100.00%
Fine Paper and Packaging | Product Concentration Risk | Graphic Imaging | Sales
Business segment
Percentage of concentration risk									79.00%	78.00%	80.00%
Fine Paper and Packaging | Product Concentration Risk | Packaging | Sales
Business segment
Percentage of concentration risk									21.00%	18.00%	16.00%
Fine Paper and Packaging | Product Concentration Risk | Filing/Office | Sales
Business segment
Percentage of concentration risk									0.00%	4.00%	4.00%
Other | Operating Segments
Business segment
Depreciation and amortization									$ 0	$ 0.2	$ 0.3
Operating income (loss)									0	(6.4)	(0.4)
Insurance recoveries										0.1	0.3
Integration costs												1.1
Pension plan settlement charge										6		$ 0.8
Other | Product | Operating Segments
Business segment
Net sales									0	5.9	6
Restatement Adjustment | Other | Operating Segments
Business segment
Net sales										(15.6)	(16.5)
Total Assets					$ (12.9)					(12.9)
Depreciation and amortization										(0.7)	(0.9)
Capital expenditures										$ 0	$ (1.1)
Dutch Defined Benefit Plan | Technical Products | Pension Benefits
Business segment
Curtailment gain									$ 1.6

Business Segment and Geograph_4

Business Segment and Geographic Information - Concentrations (Details) - Sales - Customer concentration risk	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Technical Products Business' Customer Number One
Concentrations
Percentage of concentration risk	8.00%
Technical Products Business' Customer Number One | Technical Products
Concentrations
Percentage of concentration risk	14.00%
Fine Paper And Packaging Business' Customer Number One
Concentrations
Percentage of concentration risk	8.00%	7.00%	7.00%
Fine Paper And Packaging Business' Customer Number One | Fine Paper and Packaging
Concentrations
Percentage of concentration risk	18.00%	16.00%	15.00%
Fine Paper And Packaging Business' Customer Number Two
Concentrations
Percentage of concentration risk		5.00%	7.00%
Fine Paper And Packaging Business' Customer Number Two | Fine Paper and Packaging
Concentrations
Percentage of concentration risk		12.00%	15.00%

Supplemental Data - Advertising

Supplemental Data - Advertising and Research and Development, Accounts Receivable, Inventory, Prepaid and Other Current Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Advertising and Research Development Expenses
Advertising expense	$ 4.9	$ 4.7	$ 6
Research and development expense	8.7	9.2	$ 8.9
Accounts Receivable - net
From customers	104.1	116.1
Less allowance for doubtful accounts and sales discounts	(1.5)	(1.3)
Total	102.6	114.8
Inventories by Major Class:
Raw materials	32.8	35.6
Work in progress	26.4	30.1
Finished goods	67.3	78.3
Supplies and other	5.2	3
Inventories, gross	131.7	147
Excess of FIFO over LIFO cost	(8.9)	(15.4)
Total	122.8	131.6
FIFO values of inventories valued on the LIFO method	102.2	109.1
Decrease in LIFO inventory quantities	0.1	0.6
Prepaid and Other Current Assets
Prepaid and other current assets	9.9	12.2
Spare parts	6.4	6.6
Receivable for income taxes	2	2.8
Total	$ 18.3	$ 21.6

Supplemental Data - Property, P

Supplemental Data - Property, Plant, and Equipment, Accrued Expense, Noncurrent Liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment - Net
Gross property, plant and equipment	$ 850,600,000	$ 840,200,000
Less accumulated depreciation	470,000,000	444,000,000
Net Property, Plant and Equipment	380,600,000	396,200,000
Depreciation expense	33,900,000	32,600,000	$ 28,300,000
Interest expense capitalized	200,000	200,000	$ 0
Accrued Expenses
Accrued salaries and employee benefits	26,200,000	23,900,000
Amounts due to customers	8,900,000	9,600,000
Accrued income taxes	500,000	5,300,000
Accrued utilities	3,000,000	3,900,000
Accrued interest	1,200,000	1,200,000
Other	7,200,000	11,300,000
Total	47,000,000	55,200,000
Noncurrent Employee Benefits
Pension benefits	57,100,000	54,000,000
Post-employment benefits other than pensions	36,000,000	38,900,000
Total	93,100,000	92,900,000
Long-term disability benefits due to Terrace Bay retirees	1,700,000	1,700,000
Other long term benefits	200,000
Land and land improvements
Property, Plant and Equipment - Net
Gross property, plant and equipment	19,400,000	19,000,000
Buildings
Property, Plant and Equipment - Net
Gross property, plant and equipment	165,400,000	156,000,000
Machinery and equipment
Property, Plant and Equipment - Net
Gross property, plant and equipment	651,000,000	650,300,000
Construction in progress
Property, Plant and Equipment - Net
Gross property, plant and equipment	14,800,000	14,900,000
Canada
Noncurrent Employee Benefits
Long-term disability benefits due to Terrace Bay retirees	$ 700,000	$ 800,000

Supplemental Data - Supplementa

Supplemental Data - Supplemental Cash Flow Data (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Disclosure of Cash Flow Information
Cash paid during the year for interest, net of interest expense capitalized	$ 10.9	$ 11.9	$ 11.3
Cash paid during the year for income taxes, net of refunds	13.3	7.6	7.6
Non-cash investing activities:
Liability for equipment acquired	3.2	3.4	5.4
Net cash provided by (used in) changes in working capital
Accounts receivable	11.6	(0.9)	(10.2)
Inventories	8.2	3.8	(11.7)
Income taxes receivable/payable	(5.4)	(1.8)	4.5
Prepaid and other current assets	2.4	(1.8)	(0.4)
Accounts payable	(14)	0.3	10.6
Accrued expenses	(3.4)	(0.6)	(4.2)
Other	0	0	(0.4)
Total	$ (0.6)	$ (1)	$ (11.8)

Unaudited Quarterly Data (Detai

Unaudited Quarterly Data (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effect of Fourth Quarter Events [Line Items]
Net sales									$ 938.5	$ 1,034.9	$ 979.9
Gross Profit	$ 44.3	$ 44.7	$ 50.7	$ 43.7	$ 34.6	$ 41.3	$ 55.1	$ 52.4	183.4	183.4	200.2
Operating Income (Loss)	22.1	19	19.8	17.4	17.8	16.5	(4.3)	24.1	78.3	54.1	104.3
Income from continuing operations	$ 15.6	$ 14.4	$ 13.6	$ 11.8	$ 12.9	$ 12.9	$ (4.8)	$ 16.2	$ 55.4	$ 37.2	$ 80.3
Earnings (Loss) Per Common Share
Basic (in dollar per share)	$ 0.92	$ 0.85	$ 0.80	$ 0.70	$ 0.77	$ 0.76	$ (0.29)	$ 0.96	$ 3.27	$ 2.20	$ 4.74
Diluted (in dollars per share)	$ 0.92	$ 0.84	$ 0.80	$ 0.69	$ 0.76	$ 0.75	$ (0.29)	$ 0.95	$ 3.26	$ 2.17	$ 4.68
Idled paper machine costs	$ 0.3	$ 2.4	$ 2
Indirect tax audit costs		0.1	0.6
Restructuring, integration and other costs		0.2	0.9		$ (0.4)	$ 2.2	$ 0.3		$ 6.2	$ 2.1	$ 1.3
Curtailment gain	1.6
Curtailment charge	0.1
Tax adjustments, settlements, and unusual provisions								$ 0.9
After-tax SERP settlement charge								0.6
Impairment loss (Note 13)					(2.9)	2	32		0	31.1	0
Pension plan settlement charge		0.1					1				0.6
Acquisition related adjustments					(0.8)	3.1			0	3.9	0
Insurance recoveries						0.4			0	0.4	3.2
Change in statutory tax rate, amount									0	1.6	9.7
Product
Effect of Fourth Quarter Events [Line Items]
Net sales	$ 213.6	$ 231.8	$ 253.4	$ 239.7	240.9	$ 256.2	$ 271.3	$ 266.5	$ 938.5	1,034.9	$ 979.9
Netherlands
Earnings (Loss) Per Common Share
Change in statutory tax rate, amount					$ 0.7					$ 0.7

SCHEDULE II SCHEDULE OF VALUA_2

SCHEDULE II SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Movement in valuation and qualifying accounts
Write-offs and Reclassifications			$ 0
Allowance for doubtful accounts
Movement in valuation and qualifying accounts
Balance at Beginning of Period	$ 0.8	$ 0.8	1
Charged to Costs and Expenses	0.5	0.1	0.2
Charged to Other Accounts	0	0	0
Write-offs and Reclassifications	(0.3)	(0.1)	(0.4)
Balance at End of Period	1	0.8	0.8
Allowance for sales discounts
Movement in valuation and qualifying accounts
Balance at Beginning of Period	0.5	0.5	0.5
Charged to Costs and Expenses	0	0	0
Charged to Other Accounts	(0.1)	0	0
Write-offs and Reclassifications	0	0
Balance at End of Period	0.4	0.5	0.5
Valuation allowance – deferred income taxes
Movement in valuation and qualifying accounts
Balance at Beginning of Period	2.7	0.4	3.5
Charged to Costs and Expenses	0	0.1	0
Charged to Other Accounts	3.1	2.2	0
Write-offs and Reclassifications	0	0	(3.1)
Balance at End of Period	$ 5.8	$ 2.7	$ 0.4

Uncategorized Items - np2019123

Label	Element	Value
Accounting Standards Update 2018-02 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (800,000)
Accounting Standards Update 2016-01 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(300,000)
Accounting Standards Update 2016-01 [Member] | AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 300,000