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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2017

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

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, pension and postretirement benefits, 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 when all of the following have occurred: (1) delivery has occurred, (2) persuasive evidence of an agreement exists, (3) pricing is fixed or determinable, and (4) collection is reasonably assured. Delivery is not considered to have occurred until the customer takes title and assumes the risks and rewards of ownership. The timing of revenue recognition is largely dependent on shipping terms. 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 has completed its assessment of the ASU 2014-09, Revenue from Contracts with Customers, and does not believe there will be a material impact from adoption on its consolidated financial statements. The Company will adopt the new standards using the modified retrospective method as of January 1, 2018. See "Recently Adopted Accounting Standards" later in this Note for further discussion.

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, 2017 and 2016, $0.1 million and $0.3 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 market. 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 loss 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 20 years, 12 years and 9.5 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 $66.6 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 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, 2017, 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 and Fair Value of Pension Plan Assets

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.

Fair Value Measurements

The Company measures the fair value of pension plan assets 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.



	December 31, 2017				December 31, 2016
	Carrying Value		Fair Value (a)		Carrying Value		Fair Value (a)
2021 Senior Notes (5.25% fixed rate)	$	175.0	$	170.2	$	175.0	$	169.5
Global Revolving Credit Facilities (variable rates)	76.9		76.9		42.9		42.9
Second German Loan Agreement (2.5% fixed rate)	6.4		6.4		6.8		6.8
Total debt	$	258.3	$	253.5	$	224.7	$	219.2

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(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 unrealized holding gains and losses are reported in other comprehensive income until realized upon sale. At December 31, 2017, the Company had $3.6 million in marketable securities classified as Other assets on the consolidated balance sheet. The cost of such marketable securities was $4.1 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 (the "SERP").

Recently Adopted Accounting Standards and Accounting Standards Changes

Recently Adopted Accounting Standards

In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805), Clarifying the Definition of a Business. The amendments in this ASU provide guidance in evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill and consolidation. The amendments are effective for the Company as of January 1, 2018, on a prospective basis. The Company early adopted ASU 2017-01 in the third quarter of 2017. There was no material impact on the consolidated financial statements as a result of the adoption.

In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income (Topic 740), to address issues related to the application of ASC 740 to certain provisions of the Tax Cuts and Jobs Act (the "Tax Act"). This ASU provides an option for entities to make a one-time reclassification from Accumulated Other Comprehensive Income (“AOCI”) to retained earnings for stranded tax effects resulting from the newly enacted tax rates for deferred tax liabilities and assets related to items within AOCI. The Company early adopted ASU 2018-02 in the fourth quarter of 2017 and accordingly reclassified $10.9 million related to stranded tax effects resulting from the Tax Act from AOCI to retained earnings. See Note 10, "Stockholders' Equity."

Accounting Standards Changes

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). This guidance specifies how and when an entity will recognize revenue arising from contracts with customers and requires entities to disclose information about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The FASB has subsequently issued additional, clarifying standards to address issues arising from implementation of the new revenue recognition standard. The Company has completed its assessment of the new standards and does not believe there will be a material impact from adoption on its consolidated financial statements. The Company will adopt the new standards using the modified retrospective method as of January 1, 2018. The new standards also require additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments.

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 guidance also eliminates current real estate-specific provisions for all entities. ASU 2016-09 is effective for fiscal years beginning after December 15, 2018, although early adoption is permitted. The Company is currently assessing the impact of the adoption of ASU 2016-09 on its consolidated financial statements.

As of December 31, 2017, 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")

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.

Accounting Standards Codification ("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, 2017, 2016 and 2015, approximately 72,000, 35,000 and 45,000 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.

Business Combinations Policy

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 August 1, 2015.

Goodwill

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, 2017. 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.

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 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.