Kraton (KRA) 10-K 27 Feb 20 2019 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 24, 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	001-34581
Entity Registrant Name	KRATON CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-0411521
Entity Address, Address Line One	15710 John F. Kennedy Blvd.
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	Houston,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77032
City Area Code	281
Local Phone Number	504-4700
Title of 12(b) Security	Common Stock, par value $0.01
Trading Symbol	KRA
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			$ 727,752,361
Entity Common Stock, Shares Outstanding		31,750,813
Documents Incorporated by Reference	Portions of Kraton Corporation's proxy statement for the 2020 Annual Meeting of Stockholders are incorporated by reference in Part III of this Annual Report on Form 10-K.
Entity Central Index Key	0001321646
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Current Fiscal Year End Date	--12-31

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 35,033	$ 85,891
Receivables, net of allowances of $434 and $784	169,603	198,046
Inventories of products	332,457	410,640
Inventories of materials and supplies	32,211	30,843
Prepaid expense	6,991	10,156
Other current assets	22,385	29,980
Current assets held for sale	51,356	0
Total current assets	650,036	765,556
Property, plant, and equipment, less accumulated depreciation of $639,197 and $597,785	925,940
Property, plant, and equipment, less accumulated depreciation of $639,197 and $597,785	925,940	941,476
Goodwill	772,418	772,886
Intangible assets, less accumulated amortization of $285,819 and $246,648	325,877	362,038
Investment in unconsolidated joint venture	11,971	12,070
Debt issuance costs	0	1,170
Deferred income taxes	8,863	10,434
Long-term operating lease assets, net	85,003
Other long-term assets	25,219	29,074
Long-term assets held for sale	27,058	0
Total assets	2,832,385	2,894,704
Current liabilities:
Current portion of long-term debt	53,139	45,321
Accounts payable-trade	168,541	182,153
Other payables and accruals	112,645	100,695
Due to related party	17,470	20,918
Current liabilities held for sale	14,849	0
Total current liabilities	366,644	349,087
Long-term debt, net of current portion	1,311,486	1,487,298
Deferred income taxes	125,240	127,827
Long-term operating lease liabilities	66,624
Other long-term liabilities	172,960	182,893
Long-term liabilities held for sale	3	0
Total liabilities	2,042,957	2,147,105
Commitments and contingencies (note 12)
Kraton stockholders’ equity:
Preferred stock, $0.01 par value; 100,000 shares authorized; none issued	0	0
Common stock, $0.01 par value; 500,000 shares authorized; 31,751 shares issued and outstanding at December 31, 2019; 31,917 shares issued and outstanding at December 31, 2018	318	319
Additional paid in capital	392,208	385,921
Retained earnings	464,712	420,597
Accumulated other comprehensive loss	(105,795)	(91,699)
Total Kraton stockholders’ equity	751,443	715,138
Noncontrolling interest	37,985	32,461
Total equity	789,428	747,599
Total liabilities and equity	$ 2,832,385	$ 2,894,704

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Receivables, allowances	$ 434	$ 784
Less accumulated depreciation	639,197	597,785
Intangible assets, accumulated amortization	$ 285,819	$ 246,648
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	31,751,000	31,917,000
Common stock, shares outstanding (in shares)	31,751,000	31,917,000

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenue	$ 1,804,436	$ 2,011,675	$ 1,960,362
Cost of goods sold	1,390,007	1,431,069	1,415,659
Gross profit	414,429	580,606	544,703
Operating expenses:
Research and development	41,073	41,296	40,283
Selling, general, and administrative	149,800	153,897	161,260
Depreciation and amortization	136,171	141,410	137,162
Gain on insurance proceeds	(32,850)	(8,900)	0
Loss on disposal of fixed assets	773	2,169	514
Operating income	119,462	250,734	205,484
Other income (expense)	3,339	(3,472)	(3,360)
Loss on extinguishment of debt	(3,521)	(79,866)	(35,389)
Earnings of unconsolidated joint venture	506	471	486
Interest expense, net	(75,782)	(93,772)	(132,459)
Income before income taxes	44,004	74,095	34,762
Income tax benefit (expense)	11,813	(3,574)	57,884
Consolidated net income	55,817	70,521	92,646
Net (income) loss attributable to noncontrolling interest	(4,512)	(3,506)	4,903
Net income attributable to Kraton	$ 51,305	$ 67,015	$ 97,549
Earnings per common share:
Basic (in dollars per share)	$ 1.61	$ 2.10	$ 3.12
Diluted (in dollars per share)	$ 1.60	$ 2.08	$ 3.07
Weighted average common shares outstanding:
Basic (in shares)	31,581	31,416	30,654
Diluted (in shares)	31,881	31,789	31,140

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income attributable to Kraton	$ 51,305	$ 67,015	$ 97,549
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax of $0	(5,296)	(14,439)	63,077
Unrealized gain (loss) on cash flow hedges, net of tax benefit of $1,165, expense of $979 and $457, respectively	(6,311)	1,368	3,283
Reclassification of (gain) loss on cash flow hedge, net of tax expense of $587 and benefit of $127, respectively	0	(1,996)	752
Unrealized gain on net investment hedge, net of tax expense of $1,379 and $2,378, respectively	7,471	8,079	0
(Increase) decrease in benefit plans liability, net of tax benefit of $2,117, expense of $3,202 and benefit of $2,241, respectively	(9,960)	13,584	(6,877)
Other comprehensive income (loss), net of tax	(14,096)	6,596	60,235
Comprehensive income attributable to Kraton	37,209	73,611	157,784
Comprehensive income (loss) attributable to noncontrolling interest	5,524	2,423	(2,298)
Consolidated comprehensive income	$ 42,733	$ 76,034	$ 155,486

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax effect	$ 0	$ 0	$ 0
Unrealized gain on cash flow hedges, tax effect	(1,165)	979	457
Reclassification of (gain) loss on cash flow hedge, tax	0	(587)	127
Unrealized gain on net investment hedge, tax (benefit)	(1,379)	2,378	0
(Increase) decrease in pension liability, (tax) benefit	$ 2,117	$ (3,202)	$ 2,241

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total Kraton Equity	Noncontrolling Interest
Beginning Balance at Dec. 31, 2016	$ 490,237	$ 310	$ 361,682	$ 254,439	$ (158,530)	$ 457,901	$ 32,336
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	92,646			97,549		97,549	(4,903)
Other comprehensive income (loss)	62,840				60,235	60,235	2,605
Retired treasury stock from employee tax withholdings	(2,298)	(1)	(2,297)			(2,298)
Exercise of stock options	10,952	5	10,947			10,952
Non-cash compensation related to equity awards	7,627	2	7,625			7,627
Ending Balance at Dec. 31, 2017	666,519	316	377,957	356,503	(98,295)	636,481	30,038
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment upon adoption of ASU 2016-09	4,515			4,515		4,515
Net income (loss)	70,521			67,015		67,015	3,506
Other comprehensive income (loss)	5,513				6,596	6,596	(1,083)
Retired treasury stock from employee tax withholdings	(6,189)	(2)	(3,266)	(2,921)		(6,189)
Exercise of stock options	3,133	2	3,131			3,133
Non-cash compensation related to equity awards	8,102	3	8,099			8,102
Ending Balance at Dec. 31, 2018	747,599	319	385,921	420,597	(91,699)	715,138	32,461
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	55,817			51,305		51,305	4,512
Other comprehensive income (loss)	(13,084)				(14,096)	(14,096)	1,012
Retired treasury stock from employee tax withholdings	(2,821)		(1,431)	(1,390)		(2,821)
Canceled stock from share repurchases	(10,000)	(3)	(4,197)	(5,800)		(10,000)
Exercise of stock options	2,424	1	2,423			2,424
Non-cash compensation related to equity awards	9,493	1	9,492			9,493
Ending Balance at Dec. 31, 2019	$ 789,428	$ 318	$ 392,208	$ 464,712	$ (105,795)	$ 751,443	$ 37,985

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Consolidated net income	$ 55,817	$ 70,521	$ 92,646
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	136,171	141,410	137,162
Lease amortization	23,093
Amortization of debt premium and original issue discount	1,064	2,202	6,169
Amortization of debt issuance costs	4,654	5,771	8,420
Loss on disposal of property, plant, and equipment	773	2,169	514
Loss on extinguishment of debt	3,521	79,866	35,389
(Earnings) loss from unconsolidated joint venture, net of dividends received	(62)	74	(49)
Deferred income tax benefit	(159)	(26,487)	(66,004)
Release of uncertain tax positions	(18,309)	0	0
Gain on insurance proceeds for capital expenditures	(3,948)	0	0
Share-based compensation	9,493	8,102	7,627
Decrease (increase) in:
Accounts receivable	5,848	(7,841)	19,237
Inventories of products, materials, and supplies	46,533	(58,077)	(22,269)
Other assets	10,986	12,304	12,941
Increase (decrease) in:
Accounts payable-trade	(3,472)	20,271	8,275
Other payables and accruals	(20,018)	(18,693)	13,463
Other long-term liabilities	(13,401)	13,742	(1,802)
Due to related party	(3,644)	1,245	3,721
Net cash provided by operating activities	234,940	246,579	255,440
CASH FLOWS FROM INVESTING ACTIVITIES
Kraton purchase of property, plant, and equipment	(103,688)	(100,122)	(99,223)
KFPC purchase of property, plant, and equipment	(965)	(2,746)	(17,103)
Purchase of software and other intangibles	(8,019)	(8,229)	(6,265)
Insurance proceeds for capital expenditures	3,948	0	0
Net cash used in investing activities	(108,724)	(111,097)	(122,591)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from debt	57,941	732,540	739,167
Repayments of debt	(198,053)	(828,747)	(938,006)
KFPC proceeds from debt	34,240	24,918	48,207
KFPC repayments of debt	(59,700)	(52,947)	(16,244)
Capital lease payments	(169)	(902)	(964)
Purchase of treasury stock	(12,821)	(6,189)	(2,298)
Proceeds from the exercise of stock options	2,424	3,133	10,952
Settlement of interest rate swap	0	2,584	(879)
Settlement of foreign currency hedges	0	0	(716)
Debt issuance costs	0	(11,113)	(14,330)
Net cash used in financing activities	(176,138)	(136,723)	(175,111)
Effect of exchange rate differences on cash	(936)	(1,920)	9,565
Net decrease in cash and cash equivalents	(50,858)	(3,161)	(32,697)
Cash and cash equivalents, beginning of period	85,891	89,052	121,749
Cash and cash equivalents, end of period	35,033	85,891	89,052
Supplemental disclosures during the period:
Cash paid (received) for income taxes, net of refunds received	7,804	4,715	(5,395)
Cash paid for interest, net of capitalized interest	56,407	106,838	103,995
Capitalized interest	3,625	3,882	4,042
Supplemental non-cash disclosures increase (decrease) during the period:
Property, plant, and equipment accruals	2,277	(1,891)	(11,957)
Operating leases	$ 105,308	$ 0	$ 0

Description of Business, Basis

Description of Business, Basis of Presentation and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Description of Business, Basis of Presentation and Significant Accounting Policies	Description of Business, Basis of Presentation and Significant Accounting Policies Description of Business . We are a leading global specialty chemicals company that manufactures styrenic block copolymers (“SBCs”), specialty polymers, and high-value performance products primarily derived from pine wood pulping co-products. Our operations are managed through two operating segments: (i) Polymer segment and (ii) Chemical segment. Operating results for Arizona Chemical are included in the accompanying consolidated financial statements since the date of acquisition. Basis of Presentation . The accompanying consolidated financial statements are for us and our consolidated subsidiaries, each of which is a wholly-owned subsidiary, except our 50% investment in our joint venture, Kraton Formosa Polymers Corporation (“KFPC”), located in Mailiao, Taiwan. KFPC is a variable interest entity for which we have determined that we are the primary beneficiary and, therefore, have consolidated into our financial statements. Our 50% investment in our joint venture located in Kashima, Japan, is accounted for under the equity method of accounting. All significant intercompany transactions have been eliminated. Significant Accounting Policies . These financial statements reflect all normal recurring adjustments that are, in the opinion of management, necessary to fairly present our results of operations and financial position. Use of Estimates . The preparation of these consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include: • the useful lives of fixed assets; • estimates of fair value for assets acquired and liabilities assumed in a purchase business combination; • allowances for doubtful accounts and sales returns; • the valuation of derivatives, deferred taxes, property, plant and equipment, inventory, and share-based compensation; and • liabilities for employee benefit obligations, environmental matters, asset retirement obligations, income tax uncertainties, and other contingencies. Cash and Cash Equivalents . It is our policy to invest our excess cash in investment instruments whose value is not subject to market fluctuations, such as bank deposits or certificates of deposit. Other permitted investments include commercial paper of major U.S. corporations with ratings of A1 by Standard & Poor’s Ratings Group or P1 by Moody’s Investor Services, Inc., loan participations of major U.S. corporations with a short term credit rating of A1/P1 and direct obligations of the U.S. government or its agencies. We consider all investments having a remaining maturity, at the time of purchase, of three months or less to be cash equivalents. Receivables . Receivables are recorded at the invoiced amount once the performance obligation has been met and do not bear interest. The allowance for doubtful accounts represents our best estimate of the amount of probable credit losses in our existing receivables and is determined based on our assessment of the credit worthiness of individual customers, historical write-off experience, and global economic data. We review the allowance for doubtful accounts quarterly. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. We do not have significant off-balance sheet credit exposure related to our customers. Inventories of Products . Inventory values include all costs directly associated with manufacturing products and are stated at the lower of cost or net realizable value, primarily determined on a first-in, first-out basis. We evaluate the carrying cost of our inventory on a quarterly basis for this purpose. If the cost of the inventories exceeds their net realizable value, provisions are made for the difference between the cost and the net realizable value. Derivative Instruments and Hedging Activities . We account for derivatives and hedging activities in accordance with ASC 815, Derivatives and Hedging, which requires entities to recognize all derivative instruments as either assets or liabilities in the balance sheet at their respective fair values. For all hedging relationships that qualify as derivatives under ASC 815, we formally document the hedging relationship and our risk-management objective and strategy for undertaking the hedge, the hedging instrument, the hedged transaction, the nature of the risk being hedged, how the hedging instrument’s effectiveness in offsetting the hedged risk will be assessed prospectively and retrospectively, and a description of the method used to measure ineffectiveness. For derivative instruments that are designated and qualify as part of a cash flow hedging relationship, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income (loss) and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. We designate net investment hedges as economic hedges of the certain net investment in foreign subsidiaries. The gain or loss on such hedging derivative instruments (or the foreign currency transaction gain or loss on the nonderivative hedging instrument) that is designated as, and is effective as, an economic hedge of the net investment in a foreign subsidiary is reported in the same manner as a translation adjustment to the extent it is effective. Any hedge ineffectiveness is recognized in earnings during the period incurred. We discontinue hedge accounting prospectively when we determine that the derivative is no longer effective, the derivative expires or is sold, terminated, or exercised, or the hedge is de-designated. In all situations in which hedge accounting is discontinued and the derivative remains outstanding, we continue to carry the derivative at its fair value on the balance sheet and recognize any subsequent changes in its fair value in earnings. When it is probable that a forecasted transaction will not occur, we discontinue hedge accounting and recognize immediately in earnings gains and losses that were accumulated in other comprehensive income (loss) related to the hedging relationship. See Note 9 Fair Value Measurements, Financial Instruments, and Credit Risk to the consolidated financial statements. Property, Plant, and Equipment. Property, plant, and equipment are stated at cost, net of accumulated depreciation. Major renewals and improvements which extend the useful lives of equipment are capitalized. Repair and maintenance costs are expensed as incurred. Disposals are removed at carrying cost less accumulated depreciation with any resulting gain or loss reflected in earnings. We capitalize interest costs which are incurred as part of the cost of constructing major facilities and equipment. See Note 14 Industry Segment and Foreign Operations to the consolidated financial statements. Depreciation is recognized using the straight-line method over the following estimated useful lives: Machinery and equipment 20 years Building and land improvements 20 years Manufacturing control equipment 10 years Office equipment 5 years Research equipment and facilities 5 years Vehicles 5 years Computer hardware and information systems 3 years Major Maintenance Activities. Major maintenance is expensed as incurred. Goodwill. We record goodwill when the purchase price of an acquired business exceeds the fair value of the net identifiable assets acquired. Goodwill is allocated to the reporting unit level based on the estimated fair value at the date of acquisition. Goodwill was recorded as a result of the Arizona Chemical Acquisition and is recorded in the Chemical operating segment. Goodwill is tested for impairment at the reporting unit level annually or more frequently as deemed necessary. Our annual measurement date for testing impairment is October 1st. The assessment is performed in three steps. We assess qualitative factors, or step zero, to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If it is more likely than not that an impairment indicator exists utilizing the qualitative method, we then utilize step one to test for impairment via estimating the fair value of our reporting units utilizing a combination of market and income approaches. This step one provides a fair value to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying value, including goodwill. The estimated fair value of our reporting units are subject to a number of estimates, including discount rates, revenue growth rates, cash flow assumptions, and market information. If potential impairments are identified, we perform step two to measure the impairment loss through a full fair value allocation of the assets and liabilities of the reporting unit utilizing the acquisition method of accounting. As of October 1, 2019, the Company elected to bypass the qualitative assessment and performed a fair value assessment of the reporting unit utilizing a combination of the income and market approach. The company’s assessment concluded that the fair value of the reporting unit exceeded the book value of the reporting unit, including goodwill, and thus there was no impairment recognized. Asset Retirement Obligations (“ARO”). We have determined that we have contractual or regulatory requirements to decommission and perform other remediation for many of our manufacturing and research facilities upon retirement. We account for ARO’s pursuant to the provisions of ASC 410-20, Asset Retirement Obligations. ASC 410-20 requires us to record the fair value of an ARO as a liability in the period in which we have a legal obligation associated with the retirement of tangible long-lived assets that result from the acquisition, construction, development, and/or normal use of the assets. The ARO is also capitalized as part of the carrying cost of the asset and is depreciated over the life of the asset. The recognition of an ARO requires us to make numerous estimates, assumptions, and judgments regarding such factors as the existence of a legal obligation for an ARO; estimated probabilities; amounts and timing of settlements; the credit-adjusted risk-free rate to be used; discount rate and inflation rates. Subsequent to the initial measurement of the ARO, the obligation is adjusted at the end of each period to reflect accretion of the liability to its non-discounted amount and changes in either the timing or the amount of the original estimated future cash flows underlying the obligation. Revisions also result in increases or decreases in the carrying cost of these assets. Increases in the ARO liability due to accretion is charged to depreciation and amortization expense. The related capitalized cost, including revisions thereto, is charged to depreciation and amortization expense. Long-Lived Assets. In accordance with the Impairment or Disposal of Long-Lived Assets Subsections of ASC 360-10, Property, Plant, and Equipment—Overall, long-lived assets, such as property, plant, and equipment, and purchased intangible assets subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If circumstances require a long-lived asset or asset group be tested for possible impairment, we first compare undiscounted cash flows expected to be generated by that asset or asset group to its carrying value. If the carrying value of the long-lived asset or asset group is not recoverable on an undiscounted cash flow basis, impairment is recognized to the extent that the carrying value exceeds its fair value. Fair value is determined through various valuation techniques including discounted cash flow models, quoted market values, and third-party independent appraisals, as considered necessary. See Note 9 Fair Value Measurements, Financial Instruments, and Credit Risk to the consolidated financial statements. Intangible Assets. Intangible assets are stated at cost, net of accumulated amortization. We have intangible assets related to technology, customer relationships, tradenames/trademarks, and software as detailed in Note 6 Detail of Certain Balance Sheet Accounts to the consolidated financial statements. See Note 6 Detail of Certain Balance Sheet Accounts to the consolidated financial statements. Intangible assets are amortized using the straight-line method over the asset's estimated useful life as follows: Technology 15 years Customer relationships 15 years Tradenames/trademarks 15 years Software 3 - 10 years Pension and Other Postretirement Plans. We sponsor noncontributory defined benefit pension plans (“Pension Plans”) and a post-retirement benefit plan (“Retiree Medical Plan”). We annually evaluate significant assumptions related to the benefits and obligations of these plans. Our estimation of the projected benefit obligations and related benefit expense requires that certain assumptions be made regarding such variables as expected return on plan assets, discount rates, rates of future compensation increases, estimated future employee turnover rates and retirement dates, distribution election rates, mortality rates, retiree utilization rates for health care services, and health care cost trend rates. The determination of the appropriate assumptions requires considerable judgment concerning future events and has a significant impact on the amount of the obligations and expense recorded. We rely in part on actuarial studies when determining the appropriateness of certain of the assumptions used in determining the benefit obligations and the annual expenses for these plans. See Note 13 Employee Benefits to the consolidated financial statements. Investment in Unconsolidated Joint Venture. Our 50.0% equity investment in a manufacturing joint venture at our Kashima site is accounted for under the equity method with our share of the operating results of the joint venture classified within earnings of unconsolidated joint venture. We evaluate our equity method investment for impairment when events or changes in circumstances indicate, in our judgment, that the carrying value of such investment may have experienced an other-than-temporary decline in value. When evidence of loss in value has occurred, we compare the estimated fair value of the investment to the carrying value of the investment to determine whether impairment has occurred. We assess the fair value of our equity method investment using commonly accepted techniques, and may use more than one method, including, but not limited to, recent third party comparable sales, internally developed analysis and analysis from outside advisors. If the estimated fair value is less than the carrying value and we consider the decline in value to be other than temporary, the excess of the carrying value over the estimated fair value is recognized in the financial statements as an impairment. See Note 15 Related Party Transactions to the consolidated financial statements. Debt Issuance Costs. We capitalize financing fees and other costs related to issuing long-term debt. We amortize these costs using the effective interest method, except for costs related to revolving debt, which are amortized using the straight-line method. The amortization of debt issuance costs is recorded in interest expense. See Note 8 Long-Term Debt to the consolidated financial statements. Contingencies . We are routinely involved in litigation, claims, and disputes incidental to our business. Professional judgment is required to classify the likelihood of these contingencies occurring. All relevant information that can be acquired concerning the uncertain set of circumstances needs to be obtained and used to determine the probability classification. A contingency is categorized as probable, reasonably possible, or remote. A contingency is classified as probable if the future event or events are likely to occur. For the probable contingencies, a loss is accrued and disclosed as of the date of the financial statements if it is both probable that an asset has been impaired or a liability has been incurred at the date of the financial statements and the amount of loss can be reasonably estimated. A reasonably possible contingency occurs if the chance of the future event or events happening is more than remote but less than likely (reasonably possible but not probable). We disclose the loss contingencies in the footnotes to the financial statements but do not recognize any liability. A remote contingency is one where the chance of the future event or events occurring is slight. We neither accrue for nor disclose the liability in the notes to the financial statements. For loss contingencies, our accounting policy is to expense legal costs as incurred. See Note 12 Commitments and Contingencies to the consolidated financial statements. Environmental Costs. Environmental costs are expensed as incurred unless the expenditures extend the economic useful life of the relevant assets. Costs that extend the economic useful life of assets are capitalized and depreciated over the remaining life of those assets. Liabilities are recorded when environmental assessments, or remedial efforts are probable, and the cost can be reasonably estimated. See Note 12 Commitments and Contingencies to the consolidated financial statements. Disclosures about Fair Value of Financial Instruments. For cash and cash equivalents, receivables, accounts payable, and certain accrued expenses, the carrying amount approximates fair value due to the short maturities of these instruments. For long-term debt instruments and interest rate swap agreements, fair value is estimated based upon market values (if applicable) or on the current interest rates available to us for debt with similar terms and remaining maturities. Considerable judgment is required in developing these estimates. See Note 9 Fair Value Measurements, Financial Instruments, and Credit Risk to the consolidated financial statements. Revenue Recognition. Revenue is recognized in accordance with the provisions of ASC 606, Revenue from Contracts with Customers, when obligations under the terms of a contract with our customer are satisfied. Generally, this occurs at a point in time when the transfer of risk and title to the product transfers to the customer. Our products are generally sold free on board shipping point or, with respect to countries other than the U.S., an equivalent basis. Our standard terms of delivery are included in our contracts of sale, order confirmation documents, and invoices. As such, all revenue is considered revenue recognized from contracts with customers and we do not have other sources of revenue. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Revenue is recognized net of sales tax, value-added taxes, and other taxes. Shipping and other transportation costs charged to customers are recorded in both revenue and cost of goods sold. We do not have any material significant payment terms as payment is received at or shortly after the point of sale. Certain customers may receive cash-based incentives (including rebates and price supports), which are accounted for as variable consideration. We estimate rebates and price supports based on the expected amount to be provided to customers and reduce revenues recognized once the performance obligation has been met. Sales commissions are expensed in cost of goods sold once the performance obligation with the associated sale has been met. We do not have significant changes in our estimates for variable considerations. See Note 3 Revenue Recognition to the consolidated financial statements. Research and Development Expenses. Research and development costs are expensed as incurred. Share-Based Compensation . Share-based compensation cost is measured at the grant date based on the fair value of the award. We recognize these costs using the straight-line method over the requisite service period. Upon adoption of ASU 2016-09, Improvements to Employee Share-Based Payment Accounting (Topic 817) , we now recognize actual forfeitures by reducing the employee share-based compensation expense in the same period as the forfeitures occur. We estimate the fair value of performance-based restricted share units using a combination of Monte Carlo simulations and internal metrics. The expected term represents the period of time that performance share units granted are expected to be outstanding. Our expected volatilities are based on historical volatilities for Kraton and the members of the peer group. The risk free interest rate for the periods within the contractual life of the performance-based restricted share units is equal to the yield, as of the valuation date, of the zero coupon U.S. Treasury STRIPS that have a remaining term equal to the length of the remaining performance period. The expected dividend yield is assumed to be zero , which is the equivalent of reinvesting dividends in the underlying company's stock. Forfeitures are recognized when they occur. See Note 5 Share-Based Compensation to the consolidated financial statements. Leases. Our leases, with a term greater than one year, are classified as either operating or financing and carried at fair value on the balance sheet as lease assets acquired and liabilities assumed, except for capital leases in existence prior to our adoption of ASC 842, Leases . Capital leases in existence at the time of our adoption of ASC 842, Leases, are accounted for in accordance with ASC 840, Leases . Our contracts, with a term greater than one year, are classified as leases if 1) there is an identified asset and contract term, 2) we have the right to substantially all the economic benefit of the asset, and 3) we have the right to direct how and for what purpose the identified asset used or we have the right to operate the asset throughout the period of use without change operations of the asset. We classify leases as financing under any of the following circumstances: • ownership of the underlying asset is transferred to us by the end of the lease term; • the lease grants us an option to purchase the underlying asset that it is reasonably certain to be exercised; • the lease term is for the major part of the remaining economic life of the underlying asset; • the present value of the lease payments and residual value guarantee equals or exceeds substantially all of the fair value of the underlying asset; or • the underlying asset so specialized that it is expected to have no use to the lessor at the end of the lease term. Our lease policy follows ASC 842, Leases, practical expedients election whereby: 1) we do not to reassess under the new standard our prior conclusions about lease identification, lease classification, and initial direct costs; 2) we elected the short-term lease recognition exemption for all leases that qualify, and 3) we do not separate lease and non-lease components for all of our leases. See Note 12 Commitments and Contingencies to the consolidated financial statements. Income Taxes. We conduct operations in separate legal entities in different jurisdictions. As a result, income tax amounts are reflected in these consolidated financial statements for each of those jurisdictions. Income taxes are recorded utilizing an asset and liability approach. This method gives consideration to the future tax consequences associated with the differences between the financial accounting and tax basis of the assets and liabilities as well as the ultimate realization of any deferred tax asset resulting from such differences. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not that a tax benefit will not be realized. In assessing the realizability of deferred tax assets, we consider whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. We consider the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. Based upon the level of historical taxable income and projections for future taxable income over the periods in which the deferred tax assets are deductible, we believe it is more likely than not that we will realize the benefits of these deductible differences, net of the existing valuation allowances. We provide liabilities for uncertain tax positions for federal, state, local, and international exposures, including interest and penalties, relating to periods subject to audit. The development of liabilities for uncertain tax positions for these exposures requires judgment about tax issues, potential outcomes, and timing. We assess tax positions and record tax benefits based upon management's evaluation of facts, circumstances, and information available at the respective reporting date. For those tax positions where it is more-likely-than-not that a tax benefit will be sustained, we have recorded the largest amount of tax benefit with a greater than 50.0% likelihood of being realized upon settlement with a tax authority. For those tax positions where it is not more-likely-than-not that a tax benefit will be sustained, no tax benefit has been recognized in the consolidated financial statements. We have established valuation allowances against a variety of deferred tax assets, including net operating loss carryforwards, foreign tax credits and other income tax credits. Valuation allowances take into consideration our expected ability to realize these deferred tax assets and reduce the value of such assets to the amount that is deemed more likely than not to be recoverable. Our ability to realize these deferred tax assets is dependent on achieving our forecast of future taxable operating income over an extended period of time. We review our forecast in relation to actual results and expected trends on a quarterly basis. If we fail to achieve our operating income targets, we may change our assessment regarding the recoverability of our net deferred tax assets and such change could result in a valuation allowance being recorded against some or all of our net deferred tax assets. A change in our valuation allowance would impact our income tax benefit (expense) and our stockholders’ equity and could have a significant impact on our results of operations or financial condition in future periods. See Note 11 Income Taxes to the consolidated financial statements. Foreign Currency Translation and Foreign Currency Exchange Rates. Financial statements of our operations outside the U.S. where the local currency is considered to be the functional currency are translated into U.S. dollars using the exchange rate at each balance sheet date for assets and liabilities and the average exchange rate for each period for revenue, expenses, gains, losses, and cash flows. The effects of translating such operations into U.S. dollars are included as a component of accumulated other comprehensive income (loss).

New Accounting Pronouncements

New Accounting Pronouncements	12 Months Ended
	Dec. 31, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements Adoption of Accounting Standards We have implemented all new accounting pronouncements that are in effect and that management believes would materially impact our financial statements. In February 2016, the Financial Accounting Standards Board (“FASB”) established Topic 842, Leases , by issuing ASU 2016-02, which requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU 2018-01, Land Easement Practical Expedient for Transition to Topic 842 ; ASU 2018-10, Codification Improvements to Topic 842, Leases ; and ASU 2018-11, Targeted Improvements . The new standard establishes a right-of-use (“ROU”) model that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than twelve months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. We adopted the new standard on January 1, 2019 and used the effective date as our date of initial application. The new standard provides a number of optional practical expedients in transition. We elected the following practical expedients: (1) “package of practical expedients”, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification, and initial direct costs; (2) the short-term lease recognition exemption for all leases that qualify; and (3) the practical expedient to not separate lease and non-lease components for all of our leases. This standard had a material effect on our financial statements. The most significant effects relate to: (1) the recognition of new ROU assets and lease liabilities on our balance sheet for our equipment, building, and vehicle operating leases; (2) the derecognition of existing assets and liabilities for straight line lease accounting under ASC 840, Leases ; and (3) providing significant new disclosures about our leasing activities. On adoption, we recognized additional operating liabilities of $70.9 million , with corresponding ROU assets of the same amount based on the present value of the remaining minimum rental payments under current leasing standards for existing operating leases. See Note 12 Commitments and Contingencies to the consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities . The objective of this ASU is to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements and make certain targeted improvements to simplify the application of the hedge accounting guidance in current GAAP. This standard is effective for fiscal years beginning after December 15, 2018. Our analysis of ASU 2017-12 was completed during 2018, and there is no material change to our financial position, results of operations, and cash flows. We adopted ASU 2017-12 effective January 1, 2019. In October 2018, the FASB issued ASU 2018-16, Derivatives and Hedging (Topic 815)-Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes. This standard is effective for fiscal years beginning after December 15, 2018. Our analysis of ASU 2018-16 was completed during 2018, and there is no material change to our financial position, results of operations, and cash flows. We adopted ASU 2018-16 effective January 1, 2019. In February 2018, the FASB issued ASU 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . This standard is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Our analysis of ASU 2018-02 was completed during 2018, and there is no material change to our financial position, results of operations, and cash flows. We adopted ASU 2018-02 effective January 1, 2019. In July 2019, the FASB issued ASU 2019-07, Codification Updates to SEC Sections. This standard is effective beginning on May 2, 2019. Our analysis of ASU 2019-07 was completed during 2019, and there is no material change to our financial position, results of operations, and cash flows. We adopted ASU 2019-07 effective May 2, 2019. New Accounting Standards to be Adopted in Future Periods In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted for any interim period after issuance of the ASU. Our analysis of ASU 2016-13 was completed during 2019, and there is no material change to our financial position, results of operations, and cash flows. We expect to adopt ASU 2016-13 effective on January 1, 2020. In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment . This standard is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for annual or interim goodwill impairment tests performed on testing dates after January 1, 2017. Our analysis of ASU 2017-04 was completed during 2019, and there is no material change to our financial position, results of operations, and cash flows. We expect to adopt ASU 2017-04 effective on January 1, 2020. In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606. This standard is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted for any interim period after issuance of the ASU. Our analysis of ASU 2018-18 was completed during 2019, and there is no material change to our financial position, results of operations, and cash flows. We expect to adopt ASU 2018-18 effective on January 1, 2020.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition Revenue is recognized when performance obligations under the terms of a contract with our customer are satisfied. Generally, this occurs at a point in time when control of the product transfers to the customer. Our standard terms of delivery are included in our contracts of sale, order confirmation documents, and invoices. As such, all revenue is considered revenue recognized from contracts with customers and we do not have other sources of revenue. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Revenue is recognized net of sales tax, value-added taxes, and other taxes. Shipping and other transportation costs charged to customers are recorded in both revenue and cost of goods sold. We do not have any material significant payment terms as payment is received at or shortly after the point of sale. Certain customers may receive cash-based incentives (including rebates and price supports), which are accounted for as variable consideration. We estimate rebates and price supports based on the expected amount to be provided to customers and reduce revenues recognized once the performance obligation has been met. Sales commissions are expensed in cost of goods sold once the performance obligation with the associated sale has been met. We do not have significant changes in our estimates for variable considerations. We have deferred revenue of $12.5 million related to contractual commitments with customers for which the performance obligation will be satisfied over time, which will range from one to ten years . The revenue associated with these performance obligations is recognized as the obligation is satisfied, which occurs as a volume based metric over time when control of the product transfers to the customer. Occasionally, we enter into bill-and-hold contracts, where we invoice the customer for products even though we retain possession of the products until a point in time in the future when the products will be shipped to the customer. In these contracts, the primary performance obligation is satisfied at a point in time when the product is segregated from our general inventory, it is ready for shipment to customer, and we do not have the ability to use the product or direct it to another customer. Additionally, we have a secondary performance obligation related to custodial costs, including storage and freight, which is satisfied over time once the product has been delivered to the customer. During the the years ended December 31, 2019 and 2018 , we recognized $5.6 million and $7.3 million , respectively, of revenue related to these arrangements. We disaggregate our revenue by segment product lines, which is how we market our products and review results of operations. The following tables disaggregate our segment revenue by major product lines: Years Ended December 31, 2019 2018 2017 Revenue (In thousands) Performance Products $ 531,437 $ 631,728 $ 640,313 Specialty Polymers 334,726 408,628 389,873 Cariflex 186,266 180,814 168,267 Other 539 416 1,223 Polymer Product Line Revenue $ 1,052,968 $ 1,221,586 $ 1,199,676 Effective January 1, 2018, results for our Roads and Construction product line have been consolidated into our Adhesives and Performance Chemicals product lines to better align customer portfolio and end usage. We have adjusted the presentations for the year ended December 31, 2017 to conform to the respective 2019 and 2018 presentations. Years Ended December 31, 2019 2018 2017 Revenue (In thousands) Adhesives $ 262,941 $ 280,867 $ 294,467 Performance Chemicals 438,146 461,100 416,264 Tires 50,381 48,122 49,955 Chemical Product Line Revenue $ 751,468 $ 790,089 $ 760,686 December 31, 2019 December 31, 2018 (In thousands) Contract receivables (1) $ 190,093 $ 197,739 Contract liabilities (2) $ 12,456 $ 13,906 ____________________________________________________ (1) Contract receivables are recorded within receivables, net of allowances on our Consolidated Balance Sheets. This includes $20.4 million of contract receivables related to the Cariflex business recorded as current assets held for sale. (2) Our contract liability decreased by $1.2 million , as a result of meeting the performance obligation, which was recognized in our Specialty Polymers product line revenue, and decreased approximately $0.3 million due to the change in currency exchange rates.

Assets Held for Sale

Assets Held for Sale	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Assets Held for Sale	Assets Held for Sale On October 30, 2019, we entered into a purchase and sale agreement to sell our Cariflex product line operated by our Polymer segment for $530.0 million in cash, subject to customary adjustments. This transaction is expected to close in the first quarter of 2020, subject to customary regulatory approvals and other closing conditions, and we expect to record a gain on the sale of assets upon closing of the transaction. This product line was deemed to be held for sale and the related assets and liabilities were classified as such in our December 31, 2019 balance sheet. We will cease depreciation of the related assets beginning in January 2020. The following are the major classes of assets and liabilities for this business that were reflected in our balance sheet as assets and liabilities held for sale at December 31, 2019. December 31, 2019 (In thousands) ASSETS Receivables, net of allowances of $51 $ 20,397 Inventories of products, net 27,030 Inventories of materials and supplies, net 965 Prepaid expenses 1,913 Other current assets 1,051 Property, plant, and equipment, less accumulated depreciation of $27,146 26,891 Other long-term assets 93 Long-term operating lease assets, net 74 Total assets $ 78,414 LIABILITIES Accounts payable-trade 9,180 Other payables and accruals 5,669 Long-term operating lease liabilities 3 Total liabilities 14,852 Net assets $ 63,562 The results of operations of this business are not classified as discontinued operations.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share-Based Compensation	Share-Based Compensation We account for share-based awards under the provisions of ASC 718, Compensation—Stock Compensation, which established the accounting for share-based awards exchanged for employee services. Accordingly, share-based compensation cost is measured at the grant date based on the fair value of the award and we expense these costs using the straight-line method over the requisite service period. Upon adoption of ASU 2016-09, Improvements to Employee Share-Based Payment Accounting (Topic 817) , we now recognize actual forfeitures by reducing the employee share-based compensation expense in the same period as the forfeitures occur. Share-based compensation expense was approximately $9.5 million , $8.1 million , and $7.6 million , tax effected by $2.1 million , $1.9 million , and $2.7 million for the years ended December 31, 2019 , 2018 , and 2017 , respectively. Our unrecognized compensation expense related to our share-based awards was as follows as of December 31, 2019 : Unrecognized Compensation Expense Weighted Average Remaining Recognition Period (In thousands) Restricted stock awards $ 1,675 0.58 Restricted stock units $ 4,993 1.61 Performance stock units $ 6,140 1.15 2016 Equity and Cash Incentive Plan. On May 18, 2016, our stockholders approved the Kraton Corporation 2016 Equity and Cash Incentive Plan (the “2016 Plan”). Under the 2016 Plan, there are a total of 4,697,702 shares of our common stock reserved for issuance. As of December 31, 2019 and 2018 there were 2,901,188 and 3,354,625 shares of our common stock available for issuance under the 2016 Plan, respectively. 2019 Equity Inducement Plan. On April 17, 2019, our stockholders approved the Kraton Corporation 2019 Equity Inducement Plan (the “Inducement Plan”). Under the Inducement Plan, there are a total of 150,000 shares of our common stock reserved for issuance. As of December 31, 2019 there were 115,991 shares of our common stock available for issuance under the Inducement Plan. Non-qualified Stock Option Activity Non-qualified option activities for the year ended December 31, 2019 are as follows: Options Weighted Average Exercise Price Aggregate (1) Weighted Average Remaining Contractual Term (In thousands) (In thousands) Outstanding at December 31, 2018 503 $ 28.12 Granted — — Exercised (116 ) 20.83 Forfeited — — Expired — — Outstanding and exercisable at December 31, 2019 387 $ 30.31 $ 157 2.30 ________________________________________________ (1) The intrinsic value of a stock option is the amount by which the market value of the underlying stock exceeds the exercise price of the option as of December 31, 2019 . These options have a ten year term. During the year ended December 31, 2019 , net proceeds of $2.4 million were received from the exercise of stock options. Years Ended December 31, 2019 2018 2017 (In thousands) Options exercised 116 173 469 Total intrinsic value of options exercised $ 623 $ 1,050 $ 11,667 Restricted Stock Awards and Restricted Stock Units We may grant to certain employees time-vested restricted stock awards and time-vested restricted stock units. Holders of restricted stock units do not have any beneficial ownership in the common stock underlying the restricted stock units and the grant represents an unsecured promise to deliver common stock on a future date. Actual shares of common stock underlying the restricted stock units will not be issued until the earlier of the passage of the vesting period, a change in control that also results in the termination of the grantee’s employment, or the death/disability of the participant. We awarded 108,076 and 180,666 restricted stock awards to our employees, which are subject to a three -year cliff vesting, during the years ended December 31, 2018 , and 2017 , respectively. We issued 23,447 , 16,932 , and 25,975 restricted stock awards to members of the board of directors during the years ended December 31, 2019 , 2018 , and 2017 , respectively, which vested on the grant date. We granted 192,214 , 32,908 , and 40,189 restricted stock units to our employees during the years ended December 31, 2019 , 2018 , and 2017 , respectively, which are subject to a three -year cliff vesting. The following table represents the non-vested restricted stock awards and restricted stock units granted, vested, and forfeited during 2019 . Restricted Stock Awards Restricted Stock Units Shares Weighted- Shares Weighted- (In thousands) (In thousands) Non-vested shares at December 31, 2018 381 $ 28.39 106 $ 26.22 Granted 23 35.78 192 34.65 Vested (161 ) 18.83 (36 ) 17.91 Forfeited (15 ) 38.57 (12 ) 35.69 Non-vested shares at December 31, 2019 228 $ 35.25 249 $ 32.74 The aggregate intrinsic value was $6.9 million and the weighted average remaining contractual term was 0.97 for restricted stock units. The intrinsic value of a restricted stock unit is the amount by which the market value of the underlying restricted stock unit exceeds the grant date value of the restricted stock unit as of December 31, 2019 . The total fair value of shares vested during the years ended December 31, 2019 , 2018 , and 2017 pursuant to restricted stock awards and restricted stock units was $6.7 million , $12.4 million , and $7.4 million , respectively. Performance Share Units We may grant to certain employees performance share units, which vest after the achievement of performance criteria and time vesting established at grant. Holders of performance share units do not have any beneficial ownership in the shares of our common stock underlying the performance share units, and the grant represents an unsecured promise to deliver shares of our common stock on a future date. The performance share units vest at the end of a three -year period assuming continued employment and assuming the Company’s achievement of the performance measures established by our compensation committee when the performance share units were initially granted. When performance share units vest, a number of shares of our common stock from 0% to 200% of the initial grant amount will be issued, depending on the level of achievement of such performance measures. We granted 137,508 , 109,844 , and 163,846 performance share units to our employees during the years ended December 31, 2019 , 2018 , and 2017 , respectively. The following table represents the non-vested performance share units granted, vested, and forfeited during 2019 . Shares (2) Weighted- average Grant-date Fair Value Aggregate (1) Weighted Average Remaining Contractual Term (In thousands) (In thousands) Non-vested shares at December 31, 2018 436 $ 30.18 Granted 138 48.04 Vested (67 ) 19.12 Forfeited (129 ) 17.40 Non-vested shares at December 31, 2019 378 $ 43.08 $ 9,463 1.15 ________________________________________________ (1) The intrinsic value of a performance share unit is the amount by which the market value of the underlying performance share unit exceeds the grant date value of the performance share unit as of December 31, 2019 . (2) During the year ended December 31, 2019 , the 2016 performance share unit awards vested with an incremental 16,369 shares awarded based on performance metrics attained. The total fair value of shares vested during the years ended December 31, 2019 and 2018 pursuant to performance share units was $2.4 million and $7.9 million , respectively. Weighted-Average Assumptions for Performance Share Unit Grant Date Fair Value For the performance share units granted in 2019 , a component of the performance targets was based on relative total shareholder return over the three -year performance cycle compared to an industry peer group. The weighted average fair value using a Monte Carlo simulation model and the corresponding weighted average assumptions for the performance share units granted were as follows: 2019 2018 2017 Risk-free interest rate 2.51 % 2.36 % 1.55 % Expected dividend yield — % — % — % Expected volatility 32.2 % 36.6 % 37.4 % Fair value per performance share award $ 60.68 $ 61.30 $ 34.84

Detail of Certain Balance Sheet

Detail of Certain Balance Sheet Accounts	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Detail of Certain Balance Sheet Accounts	Detail of Certain Balance Sheet Accounts December 31, 2019 2018 (In thousands) Inventories of products: Finished products $ 255,406 $ 315,361 Work in progress 4,589 5,781 Raw materials 80,647 97,550 Inventories of products, gross 340,642 418,692 Inventory reserves (8,185 ) (8,052 ) Inventories of products, net $ 332,457 $ 410,640 Property, plant, and equipment: Land $ 38,494 $ 37,799 Buildings 182,873 178,245 Plant and equipment (1) 1,270,646 1,236,163 Construction in progress 73,124 87,054 Property, plant, and equipment 1,565,137 1,539,261 Less accumulated depreciation 639,197 597,785 Property, plant, and equipment, net of accumulated depreciation $ 925,940 $ 941,476 Intangible assets: Contractual agreements $ 261,923 $ 262,624 Technology 145,663 145,698 Customer relationships 60,291 60,359 Tradenames/trademarks 80,638 80,557 Software 63,181 59,448 Intangible assets 611,696 608,686 Less accumulated amortization: Contractual agreements 87,576 65,958 Technology 68,132 62,019 Customer relationships 38,760 37,409 Tradenames/trademarks 48,162 42,797 Software 43,189 38,465 Accumulated amortization 285,819 246,648 Intangible assets, net of accumulated amortization $ 325,877 $ 362,038 ________________________________________________ (1) Plant and equipment, net of depreciation, includes $3.4 million and $4.1 million of assets related to capital leases as of December 31, 2019 and December 31, 2018 , respectively. December 31, 2019 2018 (In thousands) Other payables and accruals: Employee related $ 25,233 $ 35,015 Short-term operating lease liabilities 20,908 — Interest payable 16,289 2,201 Property, plant, and equipment accrual 13,259 10,982 Customer related 10,329 11,441 Other 26,627 41,056 Total other payables and accruals $ 112,645 $ 100,695 Other long-term liabilities: Pension and other postretirement benefits $ 126,386 $ 122,194 Long-term tax liability 21,022 24,875 Deferred income 11,049 23,616 Other 14,503 12,208 Total other long-term liabilities $ 172,960 $ 182,893 Depreciation expense for property, plant, and equipment was approximately $89.9 million , $91.8 million , and $84.5 million for the years ended December 31, 2019 , 2018 , and 2017 , respectively. Amortization expense for intangible assets was approximately $46.0 million , $49.3 million , and $52.4 million for the years ended December 31, 2019 , 2018 , and 2017 , respectively. Estimated amortization expense for each of the next five years is as follows: December 31: Amortization Expense (In thousands) 2020 $ 41,815 2021 $ 39,182 2022 $ 37,435 2023 $ 36,445 2024 $ 36,231 Changes in accumulated other comprehensive income (loss) by component were as follows: Cumulative Foreign Currency Translation Cash Flow Hedges, Net of Tax Net Investment Hedges, Net of Tax Benefit Plans Liability, Net of Tax Total (In thousands) Balance at December 31, 2017 $ (9,654 ) $ 4,550 $ (1,926 ) $ (91,265 ) $ (98,295 ) Other comprehensive income (loss) before reclassifications (14,439 ) 1,368 8,079 10,317 5,325 Amounts reclassified to (income) expense from accumulated other comprehensive loss — (1,996 ) (2) — 3,267 (1) 1,271 Net other comprehensive income (loss) for the year (14,439 ) (628 ) 8,079 13,584 6,596 Balance at December 31, 2018 (24,093 ) 3,922 6,153 (77,681 ) (91,699 ) Other comprehensive income (loss) before reclassifications (5,296 ) (6,311 ) 7,471 (7,071 ) (11,207 ) Amounts reclassified to income from accumulated other comprehensive income — — — (2,889 ) (1) (2,889 ) Net other comprehensive income (loss) for the year (5,296 ) (6,311 ) 7,471 (9,960 ) (14,096 ) Balance at December 31, 2019 $ (29,389 ) $ (2,389 ) $ 13,624 $ (87,641 ) $ (105,795 ) ________________________________________________ (1) The reclassifications from accumulated other comprehensive income (loss) is for the change in benefit plans liability represents amortization of net actuarial losses and prior service costs. These costs are allocated between cost of goods sold, selling, general, and administrative and research and development expenses in the Consolidated Statement of Operations. See Note 13 Employee Benefits for further information related to net periodic benefit cost for pension and other post-retirement benefit plans. (2) The reclassifications from accumulated other comprehensive income (loss) is related to the exit of interest rate swaps related to prepayments under our U.S. dollar denominated tranche (the “USD Tranche”). These costs are recorded in loss on extinguishment of debt in the Consolidated Statement of Operations.

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”) Basic EPS is computed by dividing net income attributable to Kraton by the weighted-average number of shares outstanding during the period. Diluted EPS is computed by dividing net income attributable to Kraton by the diluted weighted-average number of shares outstanding during the period and, accordingly, reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as stock options, were exercised, settled, or converted into common stock and were dilutive. The diluted weighted-average number of shares used in our diluted EPS calculation is determined using the treasury stock method. Unvested awards of share-based payments with rights to receive dividends or dividend equivalents, such as our restricted stock awards are considered to be participating securities and therefore the two-class method is used for purposes of calculating EPS. Under the two-class method, a portion of net income is allocated to these participating securities and therefore is excluded from the calculation of EPS allocated to common stock. These shares are subject to forfeiture and restrictions on transfer until vested and have identical voting, income, and distribution rights to the unrestricted common shares outstanding. We withheld 82,721 , 140,064 , and 68,815 shares of restricted stock upon vesting to satisfy employee payroll tax withholding requirements for the years ended December 31, 2019 , 2018 , and 2017 , respectively. We immediately retired all shares withheld and the transactions were reflected in additional paid in capital and retained earnings in the Consolidated Statements of Changes in Equity and as a purchase of treasury stock in the Consolidated Statements of Cash Flows. The computation of diluted EPS excludes the effect of performance share units for which the performance contingencies had not been met as of the reporting date, amounting to 378,084 , 436,370 , and 585,838 units at December 31, 2019 , 2018 , and 2017 , respectively. The computation of diluted earnings per share excludes the effect of the potential exercise of stock options that are anti-dilutive, amounting to 309,476 and 431,627 options for the years ended December 31, 2019 and 2018 , respectively. We did no t exclude any options for the year ended December 31, 2017 . The calculations of basic and diluted EPS are as follows: Year Ended December 31, 2019 Net Weighted Earnings (In thousands, except per share data) Basic: As reported $ 51,305 31,828 Amounts allocated to unvested restricted shares (399 ) (247 ) Amounts available to common stockholders 50,906 31,581 $ 1.61 Diluted: Amounts allocated to unvested restricted shares 399 247 Non participating share units 259 Stock options added under the treasury stock method 41 Amounts reallocated to unvested restricted shares (395 ) (247 ) Amounts available to stockholders and assumed conversions $ 50,910 31,881 $ 1.60 Year Ended December 31, 2018 Net Weighted Earnings (In thousands, except per share data) Basic: As reported $ 67,015 31,878 Amounts allocated to unvested restricted shares (972 ) (462 ) Amounts available to common stockholders 66,043 31,416 $ 2.10 Diluted: Amounts allocated to unvested restricted shares 972 462 Non participating share units 168 Stock options added under the treasury stock method 205 Amounts reallocated to unvested restricted shares (961 ) (462 ) Amounts available to stockholders and assumed conversions $ 66,054 31,789 $ 2.08 Year Ended December 31, 2017 Net Weighted Earnings (In thousands, except per share data) Basic: As reported $ 97,549 31,241 Amounts allocated to unvested restricted shares (1,832 ) (587 ) Amounts available to common stockholders 95,717 30,654 $ 3.12 Diluted: Amounts allocated to unvested restricted shares 1,832 587 Non participating share units 170 Stock options added under the treasury stock method 316 Amounts reallocated to unvested restricted shares (1,804 ) (587 ) Amounts available to stockholders and assumed conversions $ 95,745 31,140 $ 3.07 Share Repurchase Program. In February 2019, we announced a repurchase program for up to $50.0 million of the Company's common stock by March 2021. Repurchases may be made at management's discretion from time to time through privately-negotiated transactions, in the open market, or through broker-negotiated purchases in compliance with applicable securities law, including through a 10b5-1 Plan. The repurchase program may be suspended for periods or discontinued at any time, and the amount and timing of the repurchases are subject to a number of factors, including Kraton's stock price. During the year ended December 31, 2019 , we repurchased 311,152 shares of our common stock at an average price of $32.14 per share and a total cost of $10.0 million . We are not obligated to acquire any specific number of shares of our common stock.

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt consists of the following: December 31, 2019 December 31, 2018 Principal Discount Debt Issuance Cost Total Principal Discount Debt Issuance Cost Total (In thousands) USD Tranche $ 290,000 $ (5,057 ) $ (6,985 ) $ 277,958 $ 362,000 $ (7,395 ) $ (10,171 ) $ 344,434 Euro Tranche 277,134 — (3,237 ) 273,897 342,900 — (4,711 ) 338,189 7.0% Senior Notes 394,750 — (5,846 ) 388,904 399,060 — (6,622 ) 392,438 5.25% Senior Notes 325,378 — (4,879 ) 320,499 331,470 — (5,503 ) 325,967 ABL Facility — — — — 5,000 — — 5,000 KFPC Loan Agreement 82,375 — (33 ) 82,342 112,489 — (94 ) 112,395 KFPC Revolving Credit Facilities 20,010 — — 20,010 13,012 — — 13,012 Capital lease obligation 1,015 — — 1,015 1,184 — — 1,184 Total debt 1,390,662 (5,057 ) (20,980 ) 1,364,625 1,567,115 (7,395 ) (27,101 ) 1,532,619 Less current portion of total debt 53,139 — — 53,139 45,321 — — 45,321 Long-term debt $ 1,337,523 $ (5,057 ) $ (20,980 ) $ 1,311,486 $ 1,521,794 $ (7,395 ) $ (27,101 ) $ 1,487,298 Senior Secured Term Loan Facility. As of December 31, 2019 , we had outstanding borrowings under the USD Tranche of our senior secured term loan facility (the “Term Loan Facility”) of $290.0 million and outstanding borrowings under the Euro denominated tranche (the “Euro Tranche”) of the Term Loan Facility of €247.0 million , or approximately $277.1 million . Our USD Tranche interest rate applicable margin is 2.5% and our alternative base rate applicable margin is 1.5% . The Euro Tranche interest rate applicable margin is 2.0% . Our Term Loan Facility will mature on March 8, 2025. As of the date of this filing, the effective interest rate for the USD Tranche is 4.3% and the effective interest rate for the Euro Tranche is 2.8% . The Term Loan Facility contains a number of customary affirmative and negative covenants and we were in compliance with those covenants as of the date of this filing. 7.0% Senior Notes due 2025. Kraton Polymers LLC and its wholly-owned financing subsidiary Kraton Polymers Capital Corporation issued $400.0 million aggregate principal amount of 7.0% Senior Notes due 2025 (the “ 7.0% Senior Notes”) in March 2017, which mature on April 15, 2025 . The 7.0% Senior Notes are general unsecured, senior obligations, and are unconditionally guaranteed on a senior unsecured basis by each of Kraton Corporation and certain of our wholly-owned domestic subsidiaries. We pay interest on the Senior Notes at 7.0% per annum, semi-annually in arrears on January 15 and July 15 of each year. On December 6, 2018 we commenced a repurchase program for up to $20.0 million of our 7.0% Senior Notes. Purchases under the program may take place from time to time in the open market and through privately negotiated transactions, including pursuant to a 10b5-1 Plan. During the year ended December 31, 2019 , we repurchased $4.3 million of our 7.0% Senior Notes. The repurchase program ended March 4, 2019. 5.25% Senior Notes due 2026. Kraton Polymers LLC and its wholly-owned financing subsidiary Kraton Polymers Capital Corporation issued €290.0 million , or approximately $325.4 million , aggregate principal amount of 5.25% Senior Notes due 2026 (the “ 5.25% Senior Notes”) in May 2018, which mature on May 15, 2026. The 5.25% Senior Notes are general unsecured, senior obligations, and are unconditionally guaranteed on a senior unsecured basis by each of Kraton Corporation and certain of our wholly-owned domestic subsidiaries. We pay interest on the Senior Notes at 5.25% per annum, semi-annually in arrears on May 15 and November 15 of each year. ABL Facility. Our asset-based revolving credit facility provides financing of up to $250.0 million (the “ABL Facility”). The ABL Facility also provides that we have the right at any time to request up to $100.0 million of additional commitments, provided that we satisfy certain additional conditions. We had no outstanding borrowings under the ABL Facility as of December 31, 2019 . The ABL Facility matures on January 6, 2021. Borrowing availability under the ABL Facility is subject to borrowing base limitations based on the level of receivables and inventory available for security. Revolver commitments under the ABL Facility consist of U.S. and Dutch revolving credit facility commitments, and the terms of the ABL Facility require the U.S. revolver commitment comprises at least 60.0% of the commitments under the ABL Facility. The ABL Facility contains a number of customary affirmative and negative covenants and we were in compliance with those covenants as of the date of this filing. KFPC Loan Agreement. As of December 31, 2019 , NTD 2.5 billion , or approximately $82.4 million , was drawn on KFPC's syndicated loan agreement (the “KFPC Loan Agreement”). For the year ended December 31, 2019 , the effective interest rate for borrowings on the KFPC Loan Agreement was 1.8% . The KFPC Loan Agreement contains certain financial covenants that change during the term of the KFPC Loan Agreement. KFPC was in compliance with those covenants as of the date of this filing. Additionally, due to a waiver received from the majority of lenders, we are no longer subject to the remaining 2019 financial covenants. In each case, these covenants are calculated and tested on an annual basis at December 31 st each year. The KFPC Loan Agreement originally matured on January 17, 2020. During the year ended December 31, 2019 , in accordance with the terms of the KFPC Loan Agreement, KFPC elected and the lender syndicate approved an extension for an additional two years to January 17, 2022. KFPC Revolving Facilities. KFPC also has four revolving credit facilities (the “KFPC Revolving Facilities”) to provide funding for working capital requirements and/or general corporate purposes, which allow for total borrowings of up to NTD 2.2 billion , or approximately $71.8 million . All of the KFPC Revolving Facilities are subject to variable interest rates. As of December 31, 2019 , NTD 600.0 million , or approximately $20.0 million , was drawn on the KFPC Revolving Facilities. Debt Issuance Costs. We capitalize debt issuance costs related to issuing long-term debt and amortize these costs using the effective interest method, except for costs related to revolving debt, which are amortized using the straight-line method. Amortization is recorded as a component of interest expense and the accelerated write-off of debt issuance costs in connection with refinancing activities are recorded as a component of loss on extinguishment of debt. We recorded a $3.5 million loss on extinguishment of debt during the year ended December 31, 2019, which includes a write off of $2.5 million related to previously capitalized deferred financing costs on our Term Loan Facility and 7.0% Senior Notes and a write off of $1.3 million related to original issue discount on our Term Loan Facility. These write offs were partially offset by a $0.3 million gain resulting from our repurchase of 7.0% Senior Notes. We recorded a $79.9 million loss on extinguishment of debt during the year ended December 31, 2018, which includes a write off of $18.7 million related to previously capitalized deferred financing costs, a write off of $17.4 million related to original issue discount on our Term Loan Facility, and a $46.4 million related to the cash tender offer and subsequent redemption of the outstanding 10.5% Senior Notes, all of which was partially offset by a $2.6 million gain on the settlement of the ineffective portion of interest rate swaps. In connection with our January 2017 repricing of our USD Tranche and our offering of 7.0% Senior Notes in March 2017, we deferred $2.0 million and $7.8 million of debt issuance costs, respectively. In connection with our August 2017 repricing of our USD Tranche and borrowings under our Euro Tranche, we deferred $1.3 million and $3.9 million of debt issuance costs, respectively. We recorded a $33.7 million loss on extinguishment of debt related to previously capitalized deferred financing costs and original issue discount on our Term Loan Facility in connection with our $758.0 million pay down of our Term Loan Facility during the year ended December 31, 2017. We had net debt issuance cost of $22.2 million as of December 31, 2019 , of which $1.2 million related to our ABL Facility is recorded in other current assets and $21.0 million is recorded as a reduction to long-term debt. We had net debt issuance cost of $29.4 million as of December 31, 2018 , of which $2.3 million related to our ABL Facility which is recorded as an asset (of which $1.2 million was included in other current assets) and $27.1 million is recorded as a reduction to long-term debt. We amortized $4.7 million , $5.8 million , and $8.4 million during the years ended December 31, 2019 , 2018 , and 2017 , respectively. Debt Maturities. The principal payments on our outstanding total debt as of December 31, 2019 , are as follows: December 31: Principal Payments (In thousands) 2020 $ 53,139 2021 33,140 2022 16,677 2023 215 2024 229 Thereafter 1,287,262 Total debt $ 1,390,662 See Note 9 Fair Value Measurements, Financial Instruments, and Credit Risk to the consolidated financial statements for fair value information related to our long-term debt.

Fair Value Measurements, Financ

Fair Value Measurements, Financial Instruments, and Credit Risk	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements, Financial Instruments, and Credit Risk	Fair Value Measurements, Financial Instruments, and Credit Risk ASC 820, “Fair Value Measurements and Disclosures” defines fair value, establishes a consistent framework for measuring fair value and expands disclosure requirements about fair value measurements. ASC 820 requires entities to, among other things, maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. ASC 820 defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820 specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our market assumptions. In accordance with ASC 820, these two types of inputs have created the following fair value hierarchy: • Level 1—Inputs that are quoted prices (unadjusted) for identical assets or liabilities in active markets; • Level 2—Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability, including: • Quoted prices for similar assets or liabilities in active markets; • Quoted prices for identical or similar assets or liabilities in markets that are not active; • Inputs other than quoted prices that is observable for the asset or liability; and • Inputs that are derived principally from or corroborated by observable market data by correlation or other means; and • Level 3—Inputs that are unobservable and reflect our assumptions used in pricing the asset or liability based on the best information available under the circumstances (e.g., internally derived assumptions surrounding the timing and amount of expected cash flows). Recurring Fair Value Measurements . The following tables set forth by level within the fair value hierarchy our financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2019 and December 31, 2018 , respectively. These financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of their fair value and their placement within the fair value hierarchy. Fair Value Measurements at Reporting Date Using Balance Sheet Location December 31, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) (In thousands) Derivative asset – current Other current assets $ 14 $ — $ 14 Derivative asset – noncurrent Other long-term assets 32 — 32 Retirement plan asset—noncurrent Other long-term assets 2,547 2,547 — Derivative liability – current Other payables and accruals (170 ) — (170 ) Total $ 2,423 $ 2,547 $ (124 ) Fair Value Measurements at Reporting Date Using Balance Sheet Location December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) (In thousands) Derivative asset – current Other current assets $ 1,558 $ — $ 1,558 Derivative asset – noncurrent Other long-term assets 3,635 — 3,635 Retirement plan asset—noncurrent Other long-term assets 2,485 2,485 — Derivative liability – current Other payables and accruals (13 ) — (13 ) Total $ 7,665 $ 2,485 $ 5,180 The use of derivatives creates exposure to credit risk relating to potential losses that could be recognized in the event that the counterparties to these instruments fail to perform their obligations under the contracts. We seek to minimize this risk by limiting our counterparties to major financial institutions with acceptable credit ratings and monitoring the total value of positions with individual counterparties. In the event of a default by one of our counterparties, we may not receive payments provided for under the terms of our derivatives. Nonrecurring Fair Value Measurements. Our long-lived assets, such as property, plant, and equipment, and purchased intangible assets subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that their carrying value may not be recoverable. When impairment has occurred, such long-lived assets are written down to fair value. During the year ended December 31, 2019, we impaired $0.8 million of certain assets, of which $0.5 million related to an expansion project in our Polymer segment. During the year ended December 31, 2018, we impaired certain assets totaling $2.2 million , largely related to the impact of Hurricane Michael in our Chemical segment. The following table presents the carrying values and approximate fair values of our debt. December 31, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value (In thousands) USD Tranche (significant other observable inputs – level 2) $ 290,000 $ 290,183 $ 362,000 $ 352,498 Euro Tranche (significant other observable inputs – level 2) $ 277,134 $ 277,827 $ 342,900 $ 338,830 7.0% Senior Notes (quoted prices in active market for identical assets – level 1) $ 394,750 $ 406,214 $ 399,060 $ 369,561 5.25% Senior Notes (quoted prices in active market for identical assets – level 1) $ 325,378 $ 338,364 $ — $ 299,125 ABL Facility (significant other observable inputs – level 2) $ — $ — $ 5,000 $ 5,000 Capital lease obligation (significant other observable inputs – level 2) $ 1,015 $ 1,015 $ 1,184 $ 1,184 KFPC Loan Agreement (significant unobservable inputs – level 3) $ 82,375 $ 82,375 $ 112,489 $ 112,489 KFPC Revolving Credit Facilities (significant unobservable inputs – level 3) $ 20,010 $ 20,010 $ 13,012 $ 13,012 The ABL Facility, Capital lease obligation, KFPC Loan Agreement, and KFPC Revolving Facilities are variable rate instruments, and as such, the fair value approximates the carrying value. Financial Instruments Interest Rate Swap Agreements. Periodically, we enter into interest rate swap agreements to hedge or otherwise protect against interest rate fluctuations on a portion of our variable rate debt. These interest rate swap agreements are designated as cash flow hedges on our exposure to the variability of future cash flows. In an effort to convert a substantial portion of our future interest payments pursuant to the USD Tranche to a fixed interest rate, in February and March 2016 we entered into a series of interest rate swap agreements with an aggregate notional value of $925.4 million , effective dates of January 3, 2017 and maturity dates of December 31, 2020. Based on debt repayments, we have exited a portion of the interest rate swap agreements originally entered into in 2017. As a result, at December 31, 2019 the total notional value of our interest rate swaps was $290.0 million , fixing LIBOR at 1.608% . We recorded an unrealized loss of $5.1 million and an unrealized gain of $2.3 million for the years ended December 31, 2019 and 2018 , respectively, in accumulated other comprehensive income (loss) in the Consolidated Balance Sheets related to the effective portion of these interest rate swap agreements. In addition, we reclassified out of other comprehensive income the settlement of a portion of our interest rate swap that amounted to a $2.6 million gain for the year ended December 31, 2018 . Foreign Currency Hedges. Periodically, we enter into foreign currency agreements to hedge or otherwise protect against fluctuations in foreign currency exchange rates. These agreements do not qualify for hedge accounting and gains/losses resulting from both the up-front premiums and/or settlement of the hedges at expiration of the agreements are recognized in the period in which they are incurred. We settled these hedges and recorded a loss of $4.0 million , $1.1 million , and $0.9 million for the years ended December 31, 2019 , 2018 , and 2017 , respectively, which are recorded in cost of goods sold in the Consolidated Statement of Operations. These contracts are structured such that these gains/losses from the mark-to-market impact of the hedging instruments materially offset the underlying foreign currency exchange gains/losses to reduce the overall impact of foreign currency exchange movements throughout the period. Net Investment Hedge. During the year ended December 31, 2019 , we designated €290.0 million of euro-denominated borrowing as a hedge against a portion of our net investment in the Company's European operations. The mark to market of this instrument was a gain of $6.1 million and $10.5 million for the year ended December 31, 2019 and 2018 , respectively, which is recorded within accumulated other comprehensive income (loss) in the Consolidated Balance Sheets. Credit Risk The use of derivatives creates exposure to credit risk in the event that the counterparties to these instruments fail to perform their obligations under the contracts, which we seek to minimize by limiting our counterparties to major financial institutions with acceptable credit ratings and by monitoring the total value of positions with individual counterparties. We analyze our counterparties’ financial condition prior to extending credit and we establish credit limits and monitor the appropriateness of those limits on an ongoing basis. We also obtain cash, letters of credit, or other acceptable forms of security from customers to provide credit support, where appropriate, based on our financial analysis of the customer and the contractual terms and conditions applicable to each transaction.

Restructuring Charges

Restructuring Charges	12 Months Ended
	Dec. 31, 2019
Restructuring and Related Activities [Abstract]
Restructuring Charges	Restructuring Charges During the three months ended March 31, 2017, we announced plans to stop producing USBC product grades in Paulinia, Brazil, and streamline production for producing Cariflex TM polyisoprene latex. We recorded $0.5 million and $1.7 million of costs during the years ended December 31, 2019 and 2018 , respectively. These charges were related to disposal of fixed assets for the year ended December 31, 2019 . For the year ended December 31, 2018 , these charges were related to severance and third party costs, which were primarily recorded in cost of goods sold. For the years ended December 31, 2019 , 2018 , and 2017 , restructuring and restructuring-related expenses amounted to $1.3 million , $3.0 million , and $7.5 million , respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income taxes are recorded utilizing an asset and liability approach. This method gives consideration to the future tax consequences associated with the differences between the financial accounting and tax basis of the assets and liabilities as well as the ultimate realization of any deferred tax asset resulting from such differences. The provision for income taxes is comprised of the following: Years Ended December 31, 2019 2018 2017 (In thousands) Current tax benefit (expense): U.S. $ 13,968 $ (22,158 ) $ (522 ) Foreign (2,314 ) (7,903 ) (7,598 ) Current tax benefit (expense) 11,654 (30,061 ) (8,120 ) Deferred tax benefit (expense): U.S. (1,621 ) 18,868 57,248 Foreign 1,780 7,619 8,756 Deferred tax benefit (expense) 159 26,487 66,004 Income tax benefit (expense) $ 11,813 $ (3,574 ) $ 57,884 Income (loss) before income taxes is comprised of the following: Years Ended December 31, 2019 2018 2017 (In thousands) Income (loss) before income taxes: U.S. $ 1,998 $ 10,605 $ (17,177 ) Foreign 42,006 63,490 51,939 Income before income taxes $ 44,004 $ 74,095 $ 34,762 The provision for income taxes differs from the amount computed by applying the U.S. corporate statutory income tax rate to income (loss) before income taxes for the reasons set forth below: Years Ended December 31, 2019 2018 2017 Income taxes at the statutory rate (21.0 )% (21.0 )% (35.0 )% Foreign tax rate differential 5.1 15.3 45.8 State taxes, net of federal benefit (0.1 ) (0.5 ) 1.1 Permanent differences 8.7 10.9 26.7 Tax credits 3.6 (0.1 ) 7.6 Alternative minimum tax — — (7.6 ) Uncertain tax positions 40.3 (8.3 ) 1.8 Valuation allowance 10.6 8.8 (4.8 ) Deferred tax rate change and transition tax (7.7 ) 14.4 — U.S. minimum tax on foreign entities (17.8 ) (16.2 ) 140.1 Other 5.1 (8.0 ) (9.1 ) Effective tax rate 26.8 % (4.7 )% 166.6 % Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, as well as net operating loss and tax credit carryforwards. The tax effects of temporary differences are comprised of the following: December 31, 2019 2018 (In thousands) Deferred tax assets: Net operating loss carryforwards $ 49,634 $ 60,718 Interest carryforwards 30,429 26,615 Tax credit carryforwards 10,301 8,261 Inventory 8,100 6,760 Benefit plans accrual 25,219 26,027 Operating leases 17,543 — Other accruals and reserves 4,782 4,739 Valuation allowance for deferred tax assets (38,440 ) (42,489 ) Deferred tax assets 107,568 90,631 Deferred tax liabilities: Property, plant, and equipment 112,454 105,097 Intangible assets 76,293 84,571 Operating leases 16,842 — Investment in subsidiaries 18,356 18,356 Deferred tax liabilities 223,945 208,024 Net deferred tax liabilities $ 116,377 $ 117,393 December 31, 2019 2018 (In thousands) Net deferred tax liabilities consist of: Non-current deferred tax assets $ 8,863 $ 10,434 Non-current deferred tax liabilities 125,240 127,827 Net deferred tax liabilities $ 116,377 $ 117,393 Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not that a tax benefit will not be realized. We consider all available material evidence, both positive and negative, in assessing the appropriateness of a valuation allowance for our deferred tax assets. In determining whether a valuation allowance is required during the period, we evaluate primarily (a) cumulative earnings and losses in recent years, (b) historical taxable income or losses as it relates to our ability to utilize operating loss and tax credit carryforwards within the expiration period, (c) trends indicating earnings or losses expected in future years along with our ability in prior years to reasonably project these future trends or operating results, (d) length of the carryback and carryforward period, and (e) prudent and feasible tax-planning strategies, particularly related to operational changes and the impact on the timing or taxability of relative amounts. As of December 31, 2019 and December 31, 2018 , a valuation allowance of $38.4 million and $42.5 million , respectively, has been provided for net operating loss carryforwards and other deferred tax assets. We decreased our valuation allowance by $4.0 million during the year ended December 31, 2019 , which includes a $3.9 million decrease primarily related to deferred tax rate changes and the utilization of net operating loss carryforwards in France and the United Kingdom, a $0.7 million decrease related to utilization of net operating loss carryforwards in the U.S., and a $0.6 million increase related to changes in other comprehensive income (loss). We decreased our valuation allowance by $8.8 million during the year ended December 31, 2018 , which includes a $4.3 million decrease primarily related to deferred tax rate changes and the utilization of net operating loss carryforwards in France and the United Kingdom, a $2.2 million decrease related to utilization of foreign tax credits and net operating loss carryforwards in the U.S., and a $2.3 million decrease related to changes in other comprehensive income (loss). We consider the reversal of deferred tax liabilities within the net operating loss carryforward period, projected future taxable income and tax planning strategies in making this assessment. For the period ending December 31, 2019 , a portion of the unremitted foreign earnings are permanently reinvested in the corresponding country of origin. Accordingly, we have not provided deferred taxes for the differences between the book basis and underlying tax basis in those subsidiaries or on the foreign currency translation adjustment amounts related to such operations. As of December 31, 2019 , we had $198.2 million of net operating loss carryforwards, of which $132.2 million relates to foreign jurisdictions and $66.0 million relates to the U.S., which will expire beginning in 2024 through 2037 , if not utilized. We expect to generate sufficient taxable income in future years that will allow utilization of the portion of the net operating loss carryforwards for which no valuation allowance has been provided. We file income tax returns in the U.S. federal jurisdiction and in various state and foreign jurisdictions. For our U.S. federal income tax returns, the statute of limitations has expired through the tax year ended December 31, 2003. As a result of net operating loss carryforwards from 2004, the statute remains open for all years subsequent to 2003. In addition, open tax years for state and foreign jurisdictions remain subject to examination. We recognize the tax impact of certain tax positions only when it is more likely than not those such positions are sustainable. The taxes are recorded in accordance with ASC 740-10, Accounting for Uncertainty in Income Taxes , which prescribes the minimum recognition threshold. As of December 31, 2019 and December 31, 2018 , we had $11.3 million and $29.6 million , respectively, of unrecognized tax benefits related to uncertain foreign tax positions, all of which, if recognized, would impact our effective tax rate. For the years ending December 31, 2019 , 2018 , and 2017 , we recorded $(4.1) million , $1.5 million , and $1.2 million in penalties and interest related to unrecognized tax benefits within the provision for income taxes. As of December 31, 2019 and December 31, 2018 , we had $2.1 million and $6.3 million of penalties and interest included in the total unrecognized tax benefits. As a result of the expiration of statute of limitations in various jurisdictions, we expect to release a $4.3 million reserve within one year. The following presents a roll forward of our unrecognized tax benefits including associated interest and penalties. December 31, 2019 2018 (In thousands) Balance at January 1 $ 29,603 $ 24,421 Increase in current year tax positions 185 5,332 Increase in prior year tax positions 710 1,442 Decrease in prior year tax positions (18,143 ) (5 ) Lapse of statute of limitations (1,061 ) (1,587 ) Balance at December 31 $ 11,294 $ 29,603 The Tax Cuts and Jobs Act enacted on December 22, 2017 (the “Tax Act”) introduced significant changes to U.S. income tax law. Effective 2018, the Tax Act reduced the U.S. statutory tax rate from 35.0% to 21.0% and created new taxes on certain foreign-sourced earnings and certain related-party payments. One-time transition tax The Tax Act required us to pay U.S. income taxes on accumulated foreign subsidiary earnings not previously subject to U.S. income tax at a rate of 15.5% to the extent of foreign cash and certain other net current assets and 8.0% on the remaining earnings. Related to the 2017 tax year, we recorded a $15.7 million one-time transitional tax liability. For the period ending December 31, 2019, we completed our analysis based on legislative updates relating to the Tax Act and made no adjustments to the provisional amounts previously recorded. Deferred tax effects Due to the change in the statutory tax rate from the Tax Act, we remeasured our deferred taxes as of December 31, 2017 to reflect the reduced rate that will apply in future periods when these deferred taxes are settled or realized. We recognized a deferred tax benefit of $95.0 million , of which $68.9 million relates to the reduction of the U.S. statutory tax rate from 35.0% to 21.0% for years after 2017 and the remaining relates to changes in our investments in foreign subsidiaries. As of December 31, 2018, we completed our analysis based on legislative updates relating to the Tax Act and made no adjustments to the provisional amounts previously recorded.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies (a) Lease Commitments - accounted for under ASC 842, Leases All of our lease ROU assets and lease liabilities are related to operating leases, where the lease term exceeds one year . Our operating leases are generally for railcars, office space, and equipment used to conduct our operations. We currently have no finance leases as that term is defined under ASC 842. These leases were discounted using a rate of 3.125% , which is based on a weighted average borrowing rate of specific debt. Non-variable lease costs include the amortization of the asset recorded on a straight-line basis. Variable lease components are non-index based payments based on performance or usage of the underlying asset. We have no material lessor or sublease income. The components of lease cost for operating leases are as follows: Year Ended December 31, 2019 (In thousands) Lease cost $ 23,093 Variable lease cost 543 Operating lease expense $ 23,636 The operating lease liabilities on a discounted basis arising from obtaining ROU assets as of December 31, 2019 were comprised as follows: Leased Asset Class Polymer Chemical Percentage Average Months Remaining on the Lease Weighted Average in Months (in thousands) Railcars $ 1,676 $ 21,946 27.0 % 44 11.8 Buildings 29,181 8,357 42.9 % 36 15.6 Equipment 3,338 9,864 15.1 % 36 5.5 Land 6,916 42 7.9 % 380 30.2 Other 712 5,500 7.1 % 19 1.3 Total $ 41,823 $ 45,709 64.4 The following tables show the undiscounted cash flows for the operating lease liabilities. December 31, 2019 (In thousands) 2020 $ 23,310 2021 17,629 2022 13,087 2023 9,665 2024 6,264 Thereafter 27,860 Total undiscounted operating lease liabilities 97,815 Present value discount (10,400 ) Foreign currency and other 117 Total discounted operating lease liabilities $ 87,532 December 31, 2018 (In thousands) 2019 $ 19,065 2020 16,891 2021 12,385 2022 8,284 2023 5,137 Thereafter 8,498 Total undiscounted operating lease liabilities $ 70,260 (b) Environmental and Safety Matters Our finished products are not generally classified as hazardous under U.S. environmental laws. However, our operations involve the handling, transportation, treatment, and disposal of potentially hazardous materials that are extensively regulated by environmental, health and safety laws, regulations, and permit requirements. Environmental permits required for our operations are subject to periodic renewal and can be revoked or modified for cause or when new or revised environmental requirements are implemented. Changing and increasingly stringent environmental requirements can affect the manufacturing, handling, processing, distribution and use of our chemical products and the raw materials used to produce such products and, if so affected, our business and operations may be materially and adversely affected. In addition, changes in environmental requirements can cause us to incur substantial costs in upgrading or redesigning our facilities and processes, including waste treatment, disposal, and other waste handling practices and equipment. We conduct environmental management programs designed to maintain compliance with applicable environmental requirements at all of our facilities. We routinely conduct inspection and surveillance programs designed to detect and respond to leaks or spills of regulated hazardous substances and to identify and correct identified regulatory deficiencies. However, a business risk inherent with chemical operations is the potential for personal injury and property damage claims from employees, contractors and their employees, and nearby landowners and occupants. While we believe our business operations and facilities generally are operated in compliance, in all material respects, with all applicable environmental and health and safety requirements, we cannot be sure that past practices or future operations will not result in material claims or regulatory action, require material environmental expenditures, or result in exposure or injury claims by employees, contractors and their employees, and the public. Some risk of environmental costs and liabilities are inherent in our operations and products, as it is with other companies engaged in similar businesses. Our Paulinia, Brazil, and Belpre, Ohio, facilities are subject to a number of actual and/or potential environmental liabilities primarily relating to contamination caused by former operations at those facilities. Some environmental laws could impose on us the entire costs of cleanup regardless of fault, legality of the original disposal, or ownership of the disposal site. In some cases, the governmental entity with jurisdiction could seek an assessment for damage to the natural resources caused by contamination from those sites. Shell Chemicals has agreed, subject to certain limitations, in time and amounts, to indemnify us against most environmental liabilities related to the acquired facilities that arise from conditions existing prior to the closing. We had no material operating expenditures for environmental fines, penalties, government imposed remedial, or corrective actions in each of the years ended December 31, 2019 , 2018 , and 2017 , respectively. As of December 31, 2019 and 2018 , we have recorded an environment obligation and corresponding receivable of $2.7 million and $2.9 million , respectively, relating to an indemnification agreement with International Paper, our Chemical segment's former owner. (c) Legal Proceedings We received an initial notice from the tax authorities in Brazil during the fourth quarter of 2012 in connection with tax credits that were generated from the purchase of certain goods which were subsequently applied by us against taxes owed. The tax authorities are currently assessing R$9.6 million , or approximately $2.4 million . We have appealed the assertion by the tax authorities in Brazil that the goods purchased were not eligible to earn the credits. While the outcome of this proceeding cannot be predicted with certainty, we do not expect this matter to have a material adverse effect upon our financial position, results of operations, or cash flows. We and certain of our subsidiaries, from time to time, are parties to various other legal proceedings, claims, and disputes that have arisen in the ordinary course of business. These claims may involve significant amounts, some of which would not be covered by insurance. A substantial settlement payment or judgment in excess of our accruals could have a material adverse effect on our financial position, results of operations or cash flows. While the outcome of these proceedings cannot be predicted with certainty, we do not expect any of these existing matters, individually or in the aggregate, to have a material adverse effect upon our financial position, results of operations or cash flows. (d) Asset Retirement Obligations (“ARO”) The changes in the aggregate carrying amount of our ARO liability are as follows: December 31, 2019 2018 (In thousands) Beginning balance $ 5,703 $ 5,712 Additional accruals 772 — Accretion expense 343 330 Obligations settled (206 ) (91 ) Foreign currency translation (89 ) (248 ) Ending balance $ 6,523 $ 5,703 In the third quarter of 2019, the Company recorded an ARO of $0.8 million related to the decommissioning of certain assets related to isosteric production at its Dover, Ohio facility. Pursuant to the indemnity included in the February 2001 separation agreement from Shell Chemical, we recorded a receivable of $0.2 million as of December 31, 2018 .

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Employee Benefits	Employee Benefits (a) Pension Plans. U.S. Retirement Benefit Plan. We have two U.S. noncontributory defined benefit pension plans (“U.S. Pension Plans”). Our Polymer segment U.S. Pension Plans covers all salaried and hourly wage employees in the U.S. who were employed by us on or before December 31, 2005. Employees who began their employment with us after December 31, 2005 are not covered by our Pension Plans. The benefits under the Pension Plans are based primarily on years of service and employees’ pay near retirement. For our employees who were employed as of March 1, 2001 and who: (1) were previously employed by Shell Chemicals; and (2) elected to transfer their pension assets to us, we consider the total combined Shell Chemicals and Kraton service when calculating the employee’s pension benefit. For those employees who: (1) elected to retire from Shell Chemicals; or (2) elected not to transfer their pension benefit, only Kraton service (since March 1, 2001) is considered when calculating benefits. Our Chemical segment U.S. Pension Plans cover all U.S. employees hired prior to July 2004 and certain retirees of the Company participate in International Paper’s defined benefit pension plans. International Paper remains responsible for all benefits related to years of service prior to December 31, 2007. The Company implemented its own defined benefit pension plan for then eligible U.S. employees on March 1, 2007. Based on the funded status and a related change in accrued pension obligations we reported a decrease in our accumulated other comprehensive income (loss) of approximately $0.1 million and $1.6 million as of December 31, 2019 and 2018 , respectively. Non-U.S. Retirement Benefit Plan. The Company sponsors defined benefit pension and retirement plans (“non-U.S. Pension Plans”) in certain foreign subsidiaries. Generally, the Company’s non-U.S. Pension Plans are funded using the projected benefit as a target in countries where funding of benefit plans is required. Based on the funded status and a related change in accrued pension obligations we reported an increase in our accumulated other comprehensive income (loss) of approximately $9.1 million and a decrease of $5.6 million as of December 31, 2019 and 2018 , respectively. The 2019 measurement date of the Pension Plan’s assets and obligations was December 31, 2019 . Information concerning the pension obligation, plan assets, amounts recognized in our financial statements, and underlying actuarial and other assumptions are as follows: U.S. Plans Non-U.S. Plans December 31, December 31, 2019 2018 2019 2018 (In thousands) Change in benefit obligation: Benefit obligation at beginning of period $ 177,589 $ 189,151 $ 81,108 $ 94,205 Service cost 2,671 3,221 1,491 2,504 Interest cost 7,781 7,200 2,112 2,073 Participant contributions — — 215 180 Benefits paid (7,354 ) (6,588 ) (3,577 ) (4,248 ) Expenses and taxes — — — — Plan amendments (12,507 ) — (321 ) 625 Settlements — — (400 ) — Actuarial (gain) loss 26,717 (15,395 ) 13,070 (9,641 ) Exchange rate (gain) loss — — 1,567 (4,590 ) Benefit obligation at end of period 194,897 177,589 95,265 81,108 Change in plan assets: Fair value at beginning of period 110,899 121,831 45,024 48,401 Return on plan assets 20,849 (11,801 ) 5,926 (2,150 ) Employer contributions 7,586 7,457 4,067 5,385 Participant contributions — — 215 180 Benefits paid (7,354 ) (6,588 ) (3,577 ) (4,248 ) Expenses and taxes — — — — Settlements — — (400 ) — Exchange rate (gain) loss — — 1,425 (2,544 ) Fair value at end of period 131,980 110,899 52,680 45,024 Funded status at end of period $ (62,917 ) $ (66,690 ) $ (42,585 ) $ (36,084 ) Amounts recognized on balance sheet: Current liabilities $ — $ — $ (2,323 ) $ (2,123 ) Noncurrent liabilities (62,917 ) (66,690 ) (40,262 ) (33,961 ) $ (62,917 ) $ (66,690 ) $ (42,585 ) $ (36,084 ) Amounts recognized in accumulated other comprehensive loss: Prior service costs $ — $ — $ 573 $ 919 Net actuarial loss 58,505 58,567 20,495 11,014 Amounts recognized in accumulated other comprehensive loss $ 58,505 $ 58,567 $ 21,068 $ 11,933 Accumulated benefit obligations $ 194,887 $ 167,678 $ 91,152 $ 77,638 During the fourth quarter of 2019 (the effective date), we amended our Polymer segment U.S. Pension Plan, eliminating future participant benefit accruals after January 31, 2020, which resulted in a pension curtailment and remeasurement as of the effective date. This plan amendment resulted in a $12.5 million reduction in pension liabilities during the year ended December 31, 2019. During the third quarter of 2019, we amended our Japan pension plan, which resulted in a pension curtailment. This plan amendment resulted in a $0.3 million reduction in pension liabilities during the year ended December 31, 2019. Estimated Future Cash Flows. The following employer contributions and benefit payments, which reflect expected future service, as appropriate, are expected to be paid: U.S. Plans Non-U.S. Plans (In thousands) Employer Contributions 2020 Employer contribution $ 9,625 $ 3,802 Benefit Payments 2020 $ 7,751 $ 3,819 2021 8,040 3,516 2022 8,409 3,654 2023 8,752 3,924 2024 9,062 3,865 Years 2024-2028 50,212 21,123 $ 92,226 $ 39,901 Net Periodic Pension Costs. Net periodic pension costs consist of the following components: U.S. Plans Non-U.S. Plans Years Ended December 31, Years Ended December 31, 2019 2018 2017 2019 2018 2017 (In thousands) Service cost benefits earned during the period $ 2,671 $ 3,221 $ 3,191 $ 1,491 $ 2,504 $ 2,749 Interest on prior year’s projected benefit obligation 7,781 7,200 7,330 2,112 2,073 2,195 Expected return on plan assets (10,065 ) (9,808 ) (9,401 ) (2,520 ) (2,685 ) (2,575 ) One-time settlement costs — — — 56 — 45 Amortization of prior service costs — — — 34 13 11 Amortization of net actuarial loss 3,487 4,650 3,622 419 645 165 Net periodic pension costs $ 3,874 $ 5,263 $ 4,742 $ 1,592 $ 2,550 $ 2,590 The estimated losses that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost in fiscal 2020 are as follows: U.S. Plans Non-U.S. Plans (In thousands) Amortization of prior service costs $ — $ 17 Amortization of net actuarial loss 1,600 1,011 $ 1,600 $ 1,028 Significant Assumptions. Discount rates are determined annually and are based on rates of return of high-quality long-term fixed income securities currently available and expected to be available during the maturity of the pension benefits. U.S. Plans Non-U.S. Plans December 31, December 31, 2019 2018 2019 2018 Weighted average assumptions used to determine benefit obligations: Discount rate 3.45 % 4.45 % 1.79 % 2.63 % Rates of increase in salary compensation level 3.00 % 3.00 % 2.96 % 2.98 % Expected long-term rate of return on plan assets 7.00 % 8.00 % 5.24 % 5.49 % Weighted average assumptions used to determine net periodic benefit cost: Discount rate 4.45 % 3.86 % 2.63 % 2.29 % Rates of increase in salary compensation level 3.00 % 3.00 % 2.98 % 3.15 % Expected long-term rate of return on plan assets 8.00 % 8.00 % 5.49 % 5.49 % Our management relied in part on actuarial studies in establishing the expected long-term rate of return on assets assumption. The studies include a review of anticipated future long-term performance of individual asset classes and consideration of the appropriate asset allocation strategy given the anticipated requirements of the Pension Plans to determine the average rate of earnings expected on the funds invested to provide for the Pension Plans' benefits. While the studies give appropriate consideration to recent fund performance and historical returns, the assumption is primarily a long-term, prospective rate. Based on our most recent study, the expected long-term return assumption for our U.S. Pension Plans effective for 2020 will be 7.0% and 5.2% for our non-U.S. Pension Plans. Based on the U.S. Pension Plan’s current target asset allocation, the median estimate for future asset returns (before non-investment expenses) was 8.5% . The asset return assumption set for determining the 2019 FASB ASC 715 expense was 8.0% , after non-investment expenses paid by the Trust. For the past three years, non-investment related expenses have averaged 0.5% . Therefore, the 8.0% return after non-investment expenses assumption is equivalent to a gross assumption of 8.5% ( 8.0% + 0.5% ). An 8.5% rate (before non-investment expenses) falls within an acceptable range of simulated asset returns, between the 40th and 60th percentile. Pension Plan Assets. We maintain target allocation percentages among various asset classes based on an investment policy established for our Pension Plans. The target allocation is designed to achieve long term objectives of return, while mitigating downside risk and considering expected cash flows. Our investment policy is reviewed from time to time to ensure consistency with our long term objective. Our Pension Plan asset allocations at December 31, 2019 and 2018 by asset category are as follows: U.S. Plans Non-U.S. Plans Target Allocation Percentage of Plan Target Allocation Percentage of Plan 2019 2019 2018 2019 2019 2018 Equity 50.0 % 68.1 % 59.5 % 50.0 % 42.1 % 46.9 % Debt 30.0 31.9 40.0 50.0 53.7 48.4 Other 20.0 — 0.5 — 4.2 4.7 Total 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % No pension assets were invested in debt or equity securities of Kraton at December 31, 2019 or 2018 . The inputs and methodology used for valuing securities are not an indication of the risk associated with investing in those securities. The following is a description of the primary valuation methodologies used for assets measured at fair value: • Common/Collective Trust Funds: Valued at the net asset value per unit held at year end as quoted by the funds. • Mutual Funds, Real Estate Funds, and Other Funds: Valued at the net asset value of shares held at year end as quoted in the active market. • Insurance contracts for purposes of funding pension benefits. A summary of total investments for our pension plan assets measured at fair value is presented below. See Note 9 Fair Value Measurements, Financial Instruments, and Credit Risk to the consolidated financial statements for a detailed description of fair value measurements and the hierarchy established for Level 1, 2, and 3 valuation inputs. Pension Plan Assets Fair Value Measurements at December 31, 2019 Total Quoted Prices In Active Markets Identical Assets (Level 1) Significant Observable Inputs (Level 2) (1) Significant Unobservable Inputs (Level 3) (In thousands) Equity $ 112,094 $ 56,220 $ 55,874 $ — Debt 70,358 12,745 57,613 — Other 2,208 963 944 301 Total $ 184,660 $ 69,928 $ 114,431 $ 301 ___________________________________________ (1) Included are plan assets valued using the net asset value practical expedient of $63.0 million . Pension Plan Assets Fair Value Measurements at December 31, 2018 Total Quoted Prices In Active Markets Identical Assets (Level 1) Significant Observable Inputs (Level 2) (1) Significant Unobservable Inputs (Level 3) (In thousands) Equity $ 87,159 $ 43,867 $ 43,292 $ — Debt 66,098 19,344 46,754 — Other 2,666 2,412 — 254 Total $ 155,923 $ 65,623 $ 90,046 $ 254 ___________________________________________ (1) Included are plan assets valued using the net asset value practical expedient of $47.1 million . (b) Other Retirement Benefit Plans. Certain employees were eligible to participate in non-qualified defined benefit restoration plans (“BRP”), which were intended to restore certain benefits under the Pension Plan in the U.S. and the Kraton Savings Plan in the U.S., that would otherwise be lost due to certain limitations imposed by law on tax-qualified plans. (c) Postretirement Benefits Other Than Pensions. Health and welfare benefits are provided to benefit eligible employees in the U.S. who retire from Kraton and were employed by us prior to January 1, 2006. Retirees under the age of 65 are eligible for the same medical, dental, and vision plans as active employees, but with an annual cap on premiums that vary based on years of service and ranges from $7,000 to $10,000 per employee. Our subsidy schedule for medical plans is based on accredited service at retirement. Retirees are responsible for the full cost of premiums for postretirement dental and vision coverage. In general, the plans stipulate that health and welfare benefits are paid as covered expenses as incurred. We accrue the cost of these benefits during the period in which the employee renders the necessary service. Employees who were retirement eligible as of February 28, 2001, have the option to participate in either Shell Chemicals' or Kraton's postretirement health and welfare plans. ASC 715, “Compensation-Retirement Benefits,” requires that we measure the plans’ assets and obligations that determine our funded status at the end of each fiscal year. The 2019 measurement date of the plans’ assets and obligations was December 31, 2019 . We are also required to recognize as a component of accumulated other comprehensive income (loss) the changes in funded status that occurred during the year that are not recognized as part of new periodic benefit cost. Based on the funded status of our postretirement benefit plan as of December 31, 2019 and 2018 , we reported an increase in our accumulated other comprehensive income (loss) of approximately $3.1 million and a decrease of $12.8 million , respectively, and a related change in accrued pension obligations. Information concerning the plan obligation, the funded status and amounts recognized in our financial statements and underlying actuarial and other assumptions are as follows: December 31, 2019 2018 (In thousands) Change in benefit obligation (1) : Benefit obligation at beginning of period $ 22,824 $ 35,851 Service cost 290 490 Interest cost 941 1,224 Benefits and expenses paid (premiums) (2,055 ) (2,081 ) Actuarial (gain) loss 1,979 (1,076 ) Plan amendments — (11,584 ) Benefit obligation at end of period 23,979 22,824 Change in plan assets (2) : Fair value at beginning of period — — Employer contributions 2,055 2,081 Benefits paid (2,055 ) (2,081 ) Fair value at end of period — — Funded status at end of year $ (23,979 ) $ (22,824 ) ___________________________________________ (1) During the year ended December 31, 2018, we amended the post-retirement benefits plan for post-65 retirees to provide an annual subsidy based on years of service. The annual subsidy replaces a company-sponsored medical plan. This plan modification resulted in a $13.1 million reduction in pension and other post-retirement liabilities during the year ended December 31, 2018. (2) Shell Chemicals has committed to a future cash payment related to retiree medical expenses based on a specified dollar amount per employee, if certain contractual commitments are met. We have recorded an asset of approximately $5.7 million and $6.8 million as our estimate of the present value of this commitment as of December 31, 2019 and 2018 , respectively. December 31, 2019 2018 (In thousands) Amounts recognized in the balance sheet: Current liabilities $ (1,446 ) $ (1,478 ) Noncurrent liabilities (22,533 ) (21,346 ) $ (23,979 ) $ (22,824 ) Amounts recognized in accumulated other comprehensive loss: Prior service cost $ (9,254 ) $ (11,002 ) Net actuarial loss $ 9,833 $ 8,476 $ 579 $ (2,526 ) Estimated Future Cash Flows. The following employer contributions and benefit payments, which reflect expected future service, as appropriate, are expected to be paid: Retiree Medical Plan (In thousands) Employer Contributions 2020 Employer contribution $ 1,470 Benefit Payments 2020 $ 1,470 2021 1,450 2022 1,430 2023 1,430 2024 1,430 Years 2024-2028 7,130 $ 14,340 Net periodic benefit costs consist of the following components: Years Ended December 31, 2019 2018 2017 (In thousands) Service cost $ 290 $ 490 $ 557 Interest cost 941 1,224 1,370 Amortization of prior service cost (1,747 ) (582 ) — Amortization of net actuarial loss 621 742 598 Net periodic benefit costs $ 105 $ 1,874 $ 2,525 December 31, 2019 2018 Weighted average assumptions used to determine benefit obligations: Measurement date 12/31/2019 12/31/2018 Discount rate 3.34 % 4.36 % Rates of increase in salary compensation level N/A N/A Weighted average assumptions used to determine net periodic benefit cost: Discount rate 4.36 % 3.94 % Rates of increase in salary compensation level N/A N/A Expected long-term rate of return on plan assets N/A N/A December 31, 2019 2018 Assumed Pre-65 health care cost trend rates: Health care cost trend rate assumed for next year 7.50 % 8.00 % Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 4.50 % 4.50 % Year that the rate reaches the ultimate trend rate 2026 2026 December 31, 2019 2018 Assumed Post-65 health care cost trend rates: Health care cost trend rate assumed for next year N/A N/A Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) N/A N/A Year that the rate reaches the ultimate trend rate N/A N/A Discount rates are determined annually and are based on rates of return of high-quality long-term fixed income securities currently available and expected to be available during the maturity of the postretirement benefit plan. Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. A 1.0% change in assumed health care cost trend rates would have the following effect (in thousands): 1% Increase 1% Decrease Effect on total of service and interest cost components $ 1 $ (3 ) Effect on postretirement benefit obligation $ 36 $ (48 ) (d) Kraton Savings Plan. The Kraton Savings Plan, as adopted on March 1, 2001, covers substantially all U.S. employees, including executive officers. Through automatic payroll deduction, participants have the option to defer up to 60% of eligible earnings in any combination of pre-tax and/or post-tax contributions, subject to annual dollar limitations set forth in the Internal Revenue Code. Under this plan, we have two types of employer contributions: (1) We make standard matching contributions of 50.0% of the first 6.0% contributed by the employee from start of employment and we make matching contributions of 100.0% of the first 6.0% contributed by the employee after completing five years of service. (2) We make enhanced employer contributions of 4.0% for all employees. For our employees who were employed as of February 28, 2001, and who were previously employed by Shell Chemicals, we recognize their Shell Chemicals years of service for purposes of determining employer contributions under our Plan. Our contributions to the plan for the years ended December 31, 2019 , 2018 , and 2017 , were $9.7 million , $9.2 million , and $8.5 million , respectively.

Industry Segment and Foreign Op

Industry Segment and Foreign Operations	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Industry Segment and Foreign Operations	Industry Segment and Foreign Operations Commensurate with the acquisition on January 6, 2016, Arizona Chemical became a separate operating segment with our operations managed through two operating segments: (i) Polymer segment and (ii) Chemical segment. In accordance with the provisions of ASC 280, “ Segment Reporting ,” our chief operating decision-maker has been identified as the President and Chief Executive Officer, who reviews operating results to make decisions about allocating resources and assessing performance for the entire company. • Polymer Segment . Our Polymer segment is comprised of our SBCs and other engineered polymers business. • Chemical Segment . Our Chemical segment is comprised of our pine-based specialty products business. Our chief operating decision maker uses operating income (loss) as the primary measure of each segment's operating results in order to allocate resources and in assessing the company's performance. In accordance with ASC 280, Segment Reporting , we have presented operating income (loss) for each segment. We currently do not have sales between segments. Operating Results by Segment Year Ended December 31, 2019 Year Ended December 31, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Revenue $ 1,052,968 $ 751,468 $ 1,804,436 $ 1,221,586 $ 790,089 $ 2,011,675 Cost of goods sold 820,410 569,597 1,390,007 872,506 558,563 1,431,069 Gross profit 232,558 181,871 414,429 349,080 231,526 580,606 Operating expenses: Research and development 29,392 11,681 41,073 28,957 12,339 41,296 Selling, general, and administrative 86,025 63,775 149,800 89,753 64,144 153,897 Depreciation and amortization 59,151 77,020 136,171 71,006 70,404 141,410 Gain on insurance proceeds — (32,850 ) (32,850 ) — (8,900 ) (8,900 ) Loss on disposal of fixed assets 647 126 773 202 1,967 2,169 Operating income $ 57,343 $ 62,119 119,462 $ 159,162 $ 91,572 250,734 Other income (expense) 3,339 (3,472 ) Loss on extinguishment of debt (3,521 ) (79,866 ) Earnings of unconsolidated joint venture 506 471 Interest expense, net (75,782 ) (93,772 ) Income before income taxes $ 44,004 $ 74,095 Year Ended December 31, 2017 Polymer Chemical Total (In thousands) Revenue $ 1,199,676 $ 760,686 $ 1,960,362 Cost of goods sold 887,096 528,563 1,415,659 Gross profit 312,580 232,123 544,703 Operating expenses: Research and development 28,387 11,896 40,283 Selling, general, and administrative 94,592 66,668 161,260 Depreciation and amortization 67,998 69,164 137,162 Loss on disposal of fixed assets 514 — 514 Operating income $ 121,089 $ 84,395 205,484 Other expense (3,360 ) Loss on extinguishment of debt (35,389 ) Earnings of unconsolidated joint venture 486 Interest expense, net (132,459 ) Income before income taxes $ 34,762 Long-Lived Assets Including Goodwill and Total Assets December 31, 2019 December 31, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Property, plant, and equipment, net $ 526,692 $ 399,248 $ 925,940 $ 543,086 $ 398,390 $ 941,476 Investment in unconsolidated joint venture $ 11,971 $ — $ 11,971 $ 12,070 $ — $ 12,070 Goodwill (1) $ — $ 772,418 $ 772,418 $ — $ 772,886 $ 772,886 Total assets $ 1,097,691 $ 1,734,694 $ 2,832,385 $ 1,160,029 $ 1,734,675 $ 2,894,704 ________________________________________________ (1) Changes in goodwill are due to the change in currency exchange rates. During the years ended December 31, 2019 , 2018 , and 2017 , no single customer accounted for 10.0% or more of our total revenue. For geographic reporting, revenue is attributed to the geographic location in which the customers’ facilities are located. Long-lived assets consist primarily of property, plant, and equipment, which are attributed to the geographic location in which they are located and presented at historical cost. Revenue by Geographic Region December 31, 2019 December 31, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Revenue: United States $ 352,735 $ 317,347 $ 670,082 $ 412,308 $ 325,193 $ 737,501 Germany 107,661 51,598 159,259 141,451 53,908 195,359 All other countries 592,572 382,523 975,095 667,827 410,988 1,078,815 $ 1,052,968 $ 751,468 $ 1,804,436 $ 1,221,586 $ 790,089 $ 2,011,675 December 31, 2017 Polymer Chemical Total (In thousands) Revenue: United States $ 373,103 $ 317,144 $ 690,247 Germany 139,256 59,820 199,076 All other countries 687,317 383,722 1,071,039 $ 1,199,676 $ 760,686 $ 1,960,362 Long-Lived Assets by Geographic Region December 31, 2019 December 31, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Long-lived assets, at cost: United States $ 568,710 $ 385,235 $ 953,945 $ 541,017 $ 357,126 $ 898,143 Taiwan 183,963 — 183,963 178,363 — 178,363 France 144,785 13,153 157,938 138,659 11,751 150,410 Brazil 24,351 — 24,351 76,454 — 76,454 Germany 70,617 5,170 75,787 68,231 4,911 73,142 All other countries 44,969 124,184 169,153 45,671 117,078 162,749 $ 1,037,395 $ 527,742 $ 1,565,137 $ 1,048,395 $ 490,866 $ 1,539,261 Our capital expenditures, excluding software and other intangibles, for the Polymer segment, excluding capital expenditures by the KFPC joint venture, were $58.7 million and $51.8 million during the year ended December 31, 2019 and 2018 , respectively, and capital expenditures, excluding software and other intangibles, for our Chemical segment were $45.0 million and $48.4 million during the year ended December 31, 2019 and 2018 , respectively. Impact of Hurricane Michael During the year ended December 31, 2019, we finalized our insurance claims with our carrier related to Hurricane Michael. As result, we received payments from our carrier of $32.9 million , of which $1.1 million was received in 2018 and deferred into 2019 when realized, which has been recorded as a gain on insurance proceeds within the Consolidated Statement of Operations. This brings our total insurance proceeds to $41.8 million to date, which offsets the lost margin and reimburses us for the direct costs and capital expenditures known to date.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions We own a 50.0% equity investment in an SBC manufacturing joint venture in Kashima, Japan. Our outstanding payables were $16.4 million and $20.1 million as of December 31, 2019 and 2018 , respectively, which were recorded in “Due to related party” liability on the Consolidated Balance Sheets. Our total purchases from the joint venture were $33.0 million , $35.4 million , and $39.6 million for the years ended December 31, 2019 , 2018 , and 2017 , respectively. We own a 50% variable interest in KFPC, an HSBC manufacturing joint venture in Mailiao, Taiwan. The KFPC joint venture is fully consolidated in our financial statements, and our joint venture partner, Formosa Petrochemical Corporation (“FPCC”), is a related party affiliate. Under the terms of the joint venture agreement, FPCC is to provide certain site services and raw materials to KFPC. Additionally, we purchase certain raw materials from FPCC for our other manufacturing locations. Our outstanding payables were $1.1 million and $0.8 million as of December 31, 2019 and 2018 , respectively, which were recorded in “Due to related party” liability on the Consolidated Balance Sheets. Our total purchases from this joint venture were $48.5 million , $47.2 million , and $14.4 million for the years ended December 31, 2019 , 2018 , and 2017 , respectively. See Note 16 Variable Interest Entity , for further discussion related to the KFPC joint venture.

Variable Interest Entity

Variable Interest Entity	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entity	Variable Interest Entity We hold a variable interest in a joint venture with FPCC to own and operate a 30 kiloton HSBC plant at FPCC’s petrochemical site in Mailiao, Taiwan. Kraton and FPCC are each 50% owners of the joint venture company, KFPC. Under the provisions of an offtake agreement with KFPC, we have exclusive rights to purchase all production from KFPC. Additionally, the agreement requires us to purchase a minimum of 80% of the plant production capacity each year at a defined fixed margin. This offtake agreement represents a variable interest that provides us the power to direct the most significant activities of KFPC and exposes us to the economic variability of the joint venture. As such, we have determined that we are the primary beneficiary of this variable interest entity, and therefore, we have consolidated KFPC in our financial statements and reflected FPCC’s 50% percent ownership as a noncontrolling interest. The following table summarizes the carrying amounts of assets and liabilities as of December 31, 2019 and 2018 for KFPC before intercompany eliminations. See Note 8 Long Term Debt , for further discussion related to the KFPC Loan Agreement executed on July 17, 2014. December 31, 2019 December 31, 2018 (In thousands) Cash and cash equivalents $ 10,402 $ 6,640 Other current assets 14,847 18,363 Property, plant, and equipment 155,153 159,893 Intangible assets 8,133 8,590 Long-term operating lease assets, net 7,044 — Other long-term assets 2,147 11,838 Total assets $ 197,726 $ 205,324 Current portion of long-term debt $ 52,961 $ 45,152 Current liabilities 12,801 14,996 Long-term debt 49,391 80,255 Long-term operating lease liabilities 6,603 — Total liabilities $ 121,756 $ 140,403

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	Selected Quarterly Financial Data (Unaudited) The following table sets forth a summary of our quarterly financial information for each of the four quarters ended December 31, 2019 and December 31, 2018 : First Quarter (1) Second Quarter (2) Third Quarter (3) Fourth Quarter (4) Total (In thousands, except per share data) 2019 Revenue $ 456,411 $ 495,280 $ 444,221 $ 408,524 $ 1,804,436 Gross profit $ 107,002 $ 129,202 $ 101,279 $ 76,946 $ 414,429 Operating income $ 35,135 $ 56,168 $ 38,103 $ (9,944 ) $ 119,462 Net income (loss) attributable to Kraton $ 12,668 $ 41,208 $ 18,693 $ (21,264 ) $ 51,305 Earnings (loss) per common share Basic $ 0.40 $ 1.29 $ 0.59 $ (0.67 ) $ 1.61 Diluted $ 0.39 $ 1.28 $ 0.58 $ (0.67 ) $ 1.60 Weighted average common shares outstanding Basic 31,633 31,692 31,486 31,516 31,581 Diluted 31,901 32,017 31,823 31,516 31,881 2018 Revenue $ 502,392 $ 538,395 $ 523,105 $ 447,783 $ 2,011,675 Gross profit $ 147,078 $ 170,709 $ 154,261 $ 108,558 $ 580,606 Operating income (loss) $ 62,155 $ 82,787 $ 72,394 $ 33,398 $ 250,734 Net income (loss) attributable to Kraton $ 22,072 $ (14,930 ) $ 42,349 $ 17,524 $ 67,015 Earnings (loss) per common share Basic $ 0.69 $ (0.47 ) $ 1.33 $ 0.55 $ 2.10 Diluted $ 0.68 $ (0.47 ) $ 1.31 $ 0.55 $ 2.08 Weighted average common shares outstanding Basic 31,241 31,441 31,459 31,520 31,416 Diluted 31,851 31,441 31,834 31,714 31,789 _______________________________________ (1) The first quarter of 2019 was positively impacted by a $11.1 million gain on insurance proceeds. The first quarter of 2018 was negatively impacted by a $7.6 million loss on extinguishment of debt. (2) The second quarter of 2019 was positively impacted by a $7.5 million gain on insurance proceeds. The second quarter of 2018 was negatively impacted by a $72.3 million loss on extinguishment of debt. (3) The third quarter of 2019 was positively impacted by a $14.3 million gain on insurance proceeds. (4) The fourth quarter of 2019 was negatively impacted by approximately $5.0 million largely related to the process to review strategic alternatives for our Cariflex business and a $3.7 million loss on extinguishment of debt. The fourth quarter of 2018 was negatively impacted by a loss on disposal of fixed assets and hurricane related costs totaling $13.7 million , partially offset by a gain on insurance proceeds of $8.9 million related to Hurricane Michael. Basic and diluted earnings per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted earnings per share information may not equal annual basic and diluted earnings per share.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events We have evaluated significant events and transactions that occurred after the balance sheet date and determined that there were no events or transactions that require recognition or disclosure in our consolidated financial statements for the period ended December 31, 2019 .

SCHEDULE II_VALUATION AND QUALI

SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS AND RESERVES	12 Months Ended
	Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS AND RESERVES	SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS AND RESERVES For the Years Ended December 31, 2019 , 2018 , and 2017 (In thousands) Balance at Beginning of Period Net Expenses Write-offs Balance at End of Period Allowance for doubtful accounts: Year Ended December 31, 2019 $ 784 $ (117 ) $ (233 ) $ 434 Year Ended December 31, 2018 $ 824 $ (40 ) $ — $ 784 Year Ended December 31, 2017 $ 814 $ 590 $ (580 ) $ 824 Balance at Beginning of Period Net Expenses Foreign Currency Balance at End of Period Inventory reserves: Year Ended December 31, 2019 $ 8,951 $ 6 $ (34 ) $ 8,923 Year Ended December 31, 2018 $ 11,452 $ (2,274 ) $ (227 ) $ 8,951 Year Ended December 31, 2017 $ 13,580 $ (2,410 ) $ 282 $ 11,452

Description of Business, Basi_2

Description of Business, Basis of Presentation and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation . The accompanying consolidated financial statements are for us and our consolidated subsidiaries, each of which is a wholly-owned subsidiary, except our 50% investment in our joint venture, Kraton Formosa Polymers Corporation (“KFPC”), located in Mailiao, Taiwan. KFPC is a variable interest entity for which we have determined that we are the primary beneficiary and, therefore, have consolidated into our financial statements. Our 50% investment in our joint venture located in Kashima, Japan, is accounted for under the equity method of accounting. All significant intercompany transactions have been eliminated. Significant Accounting Policies . These financial statements reflect all normal recurring adjustments that are, in the opinion of management, necessary to fairly present our results of operations and financial position.
Use of Estimates	Use of Estimates . The preparation of these consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include: • the useful lives of fixed assets; • estimates of fair value for assets acquired and liabilities assumed in a purchase business combination; • allowances for doubtful accounts and sales returns; • the valuation of derivatives, deferred taxes, property, plant and equipment, inventory, and share-based compensation; and • liabilities for employee benefit obligations, environmental matters, asset retirement obligations, income tax uncertainties, and other contingencies.
Cash and Cash Equivalents	Cash and Cash Equivalents . It is our policy to invest our excess cash in investment instruments whose value is not subject to market fluctuations, such as bank deposits or certificates of deposit. Other permitted investments include commercial paper of major U.S. corporations with ratings of A1 by Standard & Poor’s Ratings Group or P1 by Moody’s Investor Services, Inc., loan participations of major U.S. corporations with a short term credit rating of A1/P1 and direct obligations of the U.S. government or its agencies. We consider all investments having a remaining maturity, at the time of purchase, of three months or less to be cash equivalents.
Receivables	Receivables . Receivables are recorded at the invoiced amount once the performance obligation has been met and do not bear interest. The allowance for doubtful accounts represents our best estimate of the amount of probable credit losses in our existing receivables and is determined based on our assessment of the credit worthiness of individual customers, historical write-off experience, and global economic data. We review the allowance for doubtful accounts quarterly. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. We do not have significant off-balance sheet credit exposure related to our customers.
Inventories of Products	Inventories of Products
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities . We account for derivatives and hedging activities in accordance with ASC 815, Derivatives and Hedging, which requires entities to recognize all derivative instruments as either assets or liabilities in the balance sheet at their respective fair values. For all hedging relationships that qualify as derivatives under ASC 815, we formally document the hedging relationship and our risk-management objective and strategy for undertaking the hedge, the hedging instrument, the hedged transaction, the nature of the risk being hedged, how the hedging instrument’s effectiveness in offsetting the hedged risk will be assessed prospectively and retrospectively, and a description of the method used to measure ineffectiveness. For derivative instruments that are designated and qualify as part of a cash flow hedging relationship, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income (loss) and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. We designate net investment hedges as economic hedges of the certain net investment in foreign subsidiaries. The gain or loss on such hedging derivative instruments (or the foreign currency transaction gain or loss on the nonderivative hedging instrument) that is designated as, and is effective as, an economic hedge of the net investment in a foreign subsidiary is reported in the same manner as a translation adjustment to the extent it is effective. Any hedge ineffectiveness is recognized in earnings during the period incurred.
Property, Plant, and Equipment	Property, Plant, and Equipment. Property, plant, and equipment are stated at cost, net of accumulated depreciation. Major renewals and improvements which extend the useful lives of equipment are capitalized. Repair and maintenance costs are expensed as incurred. Disposals are removed at carrying cost less accumulated depreciation with any resulting gain or loss reflected in earnings. We capitalize interest costs which are incurred as part of the cost of constructing major facilities and equipment. See Note 14 Industry Segment and Foreign Operations to the consolidated financial statements. Depreciation is recognized using the straight-line method over the following estimated useful lives: Machinery and equipment 20 years Building and land improvements 20 years Manufacturing control equipment 10 years Office equipment 5 years Research equipment and facilities 5 years Vehicles 5 years Computer hardware and information systems 3 years
Major Maintenance Activities	Major Maintenance Activities. Major maintenance is expensed as incurred.
Goodwill	Goodwill. We record goodwill when the purchase price of an acquired business exceeds the fair value of the net identifiable assets acquired. Goodwill is allocated to the reporting unit level based on the estimated fair value at the date of acquisition. Goodwill was recorded as a result of the Arizona Chemical Acquisition and is recorded in the Chemical operating segment. Goodwill is tested for impairment at the reporting unit level annually or more frequently as deemed necessary. Our annual measurement date for testing impairment is October 1st. The assessment is performed in three steps. We assess qualitative factors, or step zero, to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If it is more likely than not that an impairment indicator exists utilizing the qualitative method, we then utilize step one to test for impairment via estimating the fair value of our reporting units utilizing a combination of market and income approaches. This step one provides a fair value to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying value, including goodwill. The estimated fair value of our reporting units are subject to a number of estimates, including discount rates, revenue growth rates, cash flow assumptions, and market information. If potential impairments are identified, we perform step two to measure the impairment loss through a full fair value allocation of the assets and liabilities of the reporting unit utilizing the acquisition method of accounting. As of October 1, 2019, the Company elected to bypass the qualitative assessment and performed a fair value assessment of the reporting unit utilizing a combination of the income and market approach. The company’s assessment concluded that the fair value of the reporting unit exceeded the book value of the reporting unit, including goodwill, and thus there was no impairment recognized.
Asset Retirement Obligation	Asset Retirement Obligations (“ARO”). We have determined that we have contractual or regulatory requirements to decommission and perform other remediation for many of our manufacturing and research facilities upon retirement. We account for ARO’s pursuant to the provisions of ASC 410-20, Asset Retirement Obligations. ASC 410-20 requires us to record the fair value of an ARO as a liability in the period in which we have a legal obligation associated with the retirement of tangible long-lived assets that result from the acquisition, construction, development, and/or normal use of the assets. The ARO is also capitalized as part of the carrying cost of the asset and is depreciated over the life of the asset. The recognition of an ARO requires us to make numerous estimates, assumptions, and judgments regarding such factors as the existence of a legal obligation for an ARO; estimated probabilities; amounts and timing of settlements; the credit-adjusted risk-free rate to be used; discount rate and inflation rates. Subsequent to the initial measurement of the ARO, the obligation is adjusted at the end of each period to reflect accretion of the liability to its non-discounted amount and changes in either the timing or the amount of the original estimated future cash flows underlying the obligation. Revisions also result in increases or decreases in the carrying cost of these assets. Increases in the ARO liability due to accretion is charged to depreciation and amortization expense. The related capitalized cost, including revisions thereto, is charged to depreciation and amortization expense.
Long-Lived Assets	Long-Lived Assets. In accordance with the Impairment or Disposal of Long-Lived Assets Subsections of ASC 360-10, Property, Plant, and Equipment—Overall,
Intangible Assets	Intangible Assets. Intangible assets are stated at cost, net of accumulated amortization. We have intangible assets related to technology, customer relationships, tradenames/trademarks, and software as detailed in Note 6 Detail of Certain Balance Sheet Accounts to the consolidated financial statements. See Note 6 Detail of Certain Balance Sheet Accounts
Pension and Other Postretirement Plans	Pension and Other Postretirement Plans.
Investment in Unconsolidated Joint Venture	Investment in Unconsolidated Joint Venture. Our 50.0% equity investment in a manufacturing joint venture at our Kashima site is accounted for under the equity method with our share of the operating results of the joint venture classified within earnings of unconsolidated joint venture.
Debt Issuance Costs	Debt Issuance Costs.
Contingencies	Contingencies
Environmental Costs	Environmental Costs.
Disclosures about Fair Value of Financial Instruments	Disclosures about Fair Value of Financial Instruments.
Revenue Recognition	Revenue Recognition. Revenue is recognized in accordance with the provisions of ASC 606, Revenue from Contracts with Customers, Revenue is recognized when performance obligations under the terms of a contract with our customer are satisfied. Generally, this occurs at a point in time when control of the product transfers to the customer. Our standard terms of delivery are included in our contracts of sale, order confirmation documents, and invoices. As such, all revenue is considered revenue recognized from contracts with customers and we do not have other sources of revenue. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Revenue is recognized net of sales tax, value-added taxes, and other taxes. Shipping and other transportation costs charged to customers are recorded in both revenue and cost of goods sold. We do not have any material significant payment terms as payment is received at or shortly after the point of sale. Certain customers may receive cash-based incentives (including rebates and price supports), which are accounted for as variable consideration. We estimate rebates and price supports based on the expected amount to be provided to customers and reduce revenues recognized once the performance obligation has been met. Sales commissions are expensed in cost of goods sold once the performance obligation with the associated sale has been met. We do not have significant changes in our estimates for variable considerations. We have deferred revenue of $12.5 million related to contractual commitments with customers for which the performance obligation will be satisfied over time, which will range from one to ten years . The revenue associated with these performance obligations is recognized as the obligation is satisfied, which occurs as a volume based metric over time when control of the product transfers to the customer. Occasionally, we enter into bill-and-hold contracts, where we invoice the customer for products even though we retain possession of the products until a point in time in the future when the products will be shipped to the customer. In these contracts, the primary performance obligation is satisfied at a point in time when the product is segregated from our general inventory, it is ready for shipment to customer, and we do not have the ability to use the product or direct it to another customer. Additionally, we have a secondary performance obligation related to custodial costs, including storage and freight, which is satisfied over time once the product has been delivered to the customer. During the the years ended December 31, 2019 and 2018 , we recognized $5.6 million and $7.3 million , respectively, of revenue related to these arrangements.
Research and Development Expenses	Research and Development Expenses. Research and development costs are expensed as incurred.
Share-Based Compensation	Share-Based Compensation . Share-based compensation cost is measured at the grant date based on the fair value of the award. We recognize these costs using the straight-line method over the requisite service period. Upon adoption of ASU 2016-09, Improvements to Employee Share-Based Payment Accounting (Topic 817) , we now recognize actual forfeitures by reducing the employee share-based compensation expense in the same period as the forfeitures occur. We estimate the fair value of performance-based restricted share units using a combination of Monte Carlo simulations and internal metrics. The expected term represents the period of time that performance share units granted are expected to be outstanding. Our expected volatilities are based on historical volatilities for Kraton and the members of the peer group. The risk free interest rate for the periods within the contractual life of the performance-based restricted share units is equal to the yield, as of the valuation date, of the zero coupon U.S. Treasury STRIPS that have a remaining term equal to the length of the remaining performance period. The expected dividend yield is assumed to be zero , which is the equivalent of reinvesting dividends in the underlying company's stock. Forfeitures are recognized when they occur. See Note 5 Share-Based Compensation to the consolidated financial statements.
Leases	Leases. Our leases, with a term greater than one year, are classified as either operating or financing and carried at fair value on the balance sheet as lease assets acquired and liabilities assumed, except for capital leases in existence prior to our adoption of ASC 842, Leases . Capital leases in existence at the time of our adoption of ASC 842, Leases, are accounted for in accordance with ASC 840, Leases . Our contracts, with a term greater than one year, are classified as leases if 1) there is an identified asset and contract term, 2) we have the right to substantially all the economic benefit of the asset, and 3) we have the right to direct how and for what purpose the identified asset used or we have the right to operate the asset throughout the period of use without change operations of the asset. We classify leases as financing under any of the following circumstances: • ownership of the underlying asset is transferred to us by the end of the lease term; • the lease grants us an option to purchase the underlying asset that it is reasonably certain to be exercised; • the lease term is for the major part of the remaining economic life of the underlying asset; • the present value of the lease payments and residual value guarantee equals or exceeds substantially all of the fair value of the underlying asset; or • the underlying asset so specialized that it is expected to have no use to the lessor at the end of the lease term. Our lease policy follows ASC 842, Leases,
Income Taxes	Income Taxes. We conduct operations in separate legal entities in different jurisdictions. As a result, income tax amounts are reflected in these consolidated financial statements for each of those jurisdictions. Income taxes are recorded utilizing an asset and liability approach. This method gives consideration to the future tax consequences associated with the differences between the financial accounting and tax basis of the assets and liabilities as well as the ultimate realization of any deferred tax asset resulting from such differences. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not that a tax benefit will not be realized. In assessing the realizability of deferred tax assets, we consider whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. We consider the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. Based upon the level of historical taxable income and projections for future taxable income over the periods in which the deferred tax assets are deductible, we believe it is more likely than not that we will realize the benefits of these deductible differences, net of the existing valuation allowances. We provide liabilities for uncertain tax positions for federal, state, local, and international exposures, including interest and penalties, relating to periods subject to audit. The development of liabilities for uncertain tax positions for these exposures requires judgment about tax issues, potential outcomes, and timing. We assess tax positions and record tax benefits based upon management's evaluation of facts, circumstances, and information available at the respective reporting date. For those tax positions where it is more-likely-than-not that a tax benefit will be sustained, we have recorded the largest amount of tax benefit with a greater than 50.0% likelihood of being realized upon settlement with a tax authority. For those tax positions where it is not more-likely-than-not that a tax benefit will be sustained, no tax benefit has been recognized in the consolidated financial statements.
Foreign Currency Translation and Foreign Currency Exchange Rates	Foreign Currency Translation and Foreign Currency Exchange Rates. Financial statements of our operations outside the U.S. where the local currency is considered to be the functional currency are translated into U.S. dollars using the exchange rate at each balance sheet date for assets and liabilities and the average exchange rate for each period for revenue, expenses, gains, losses, and cash flows. The effects of translating such operations into U.S. dollars are included as a component of accumulated other comprehensive income (loss).
Adoption of Accounting Standards and New Accounting Standards to be Adopted in Future Periods	Adoption of Accounting Standards We have implemented all new accounting pronouncements that are in effect and that management believes would materially impact our financial statements. In February 2016, the Financial Accounting Standards Board (“FASB”) established Topic 842, Leases , by issuing ASU 2016-02, which requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU 2018-01, Land Easement Practical Expedient for Transition to Topic 842 ; ASU 2018-10, Codification Improvements to Topic 842, Leases ; and ASU 2018-11, Targeted Improvements . The new standard establishes a right-of-use (“ROU”) model that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than twelve months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. We adopted the new standard on January 1, 2019 and used the effective date as our date of initial application. The new standard provides a number of optional practical expedients in transition. We elected the following practical expedients: (1) “package of practical expedients”, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification, and initial direct costs; (2) the short-term lease recognition exemption for all leases that qualify; and (3) the practical expedient to not separate lease and non-lease components for all of our leases. This standard had a material effect on our financial statements. The most significant effects relate to: (1) the recognition of new ROU assets and lease liabilities on our balance sheet for our equipment, building, and vehicle operating leases; (2) the derecognition of existing assets and liabilities for straight line lease accounting under ASC 840, Leases ; and (3) providing significant new disclosures about our leasing activities. On adoption, we recognized additional operating liabilities of $70.9 million , with corresponding ROU assets of the same amount based on the present value of the remaining minimum rental payments under current leasing standards for existing operating leases. See Note 12 Commitments and Contingencies to the consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities . The objective of this ASU is to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements and make certain targeted improvements to simplify the application of the hedge accounting guidance in current GAAP. This standard is effective for fiscal years beginning after December 15, 2018. Our analysis of ASU 2017-12 was completed during 2018, and there is no material change to our financial position, results of operations, and cash flows. We adopted ASU 2017-12 effective January 1, 2019. In October 2018, the FASB issued ASU 2018-16, Derivatives and Hedging (Topic 815)-Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes. This standard is effective for fiscal years beginning after December 15, 2018. Our analysis of ASU 2018-16 was completed during 2018, and there is no material change to our financial position, results of operations, and cash flows. We adopted ASU 2018-16 effective January 1, 2019. In February 2018, the FASB issued ASU 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . This standard is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Our analysis of ASU 2018-02 was completed during 2018, and there is no material change to our financial position, results of operations, and cash flows. We adopted ASU 2018-02 effective January 1, 2019. In July 2019, the FASB issued ASU 2019-07, Codification Updates to SEC Sections. This standard is effective beginning on May 2, 2019. Our analysis of ASU 2019-07 was completed during 2019, and there is no material change to our financial position, results of operations, and cash flows. We adopted ASU 2019-07 effective May 2, 2019. New Accounting Standards to be Adopted in Future Periods In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted for any interim period after issuance of the ASU. Our analysis of ASU 2016-13 was completed during 2019, and there is no material change to our financial position, results of operations, and cash flows. We expect to adopt ASU 2016-13 effective on January 1, 2020. In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment . This standard is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for annual or interim goodwill impairment tests performed on testing dates after January 1, 2017. Our analysis of ASU 2017-04 was completed during 2019, and there is no material change to our financial position, results of operations, and cash flows. We expect to adopt ASU 2017-04 effective on January 1, 2020. In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606. This standard is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted for any interim period after issuance of the ASU. Our analysis of ASU 2018-18 was completed during 2019, and there is no material change to our financial position, results of operations, and cash flows. We expect to adopt ASU 2018-18 effective on January 1, 2020.

Description of Business, Basi_3

Description of Business, Basis of Presentation and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Estimated useful lives of property, plant and equipment	Depreciation is recognized using the straight-line method over the following estimated useful lives: Machinery and equipment 20 years Building and land improvements 20 years Manufacturing control equipment 10 years Office equipment 5 years Research equipment and facilities 5 years Vehicles 5 years Computer hardware and information systems 3 years
Schedule of intangible assets	Intangible assets are amortized using the straight-line method over the asset's estimated useful life as follows: Technology 15 years Customer relationships 15 years Tradenames/trademarks 15 years Software 3 - 10 years

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	We disaggregate our revenue by segment product lines, which is how we market our products and review results of operations. The following tables disaggregate our segment revenue by major product lines: Years Ended December 31, 2019 2018 2017 Revenue (In thousands) Performance Products $ 531,437 $ 631,728 $ 640,313 Specialty Polymers 334,726 408,628 389,873 Cariflex 186,266 180,814 168,267 Other 539 416 1,223 Polymer Product Line Revenue $ 1,052,968 $ 1,221,586 $ 1,199,676 Effective January 1, 2018, results for our Roads and Construction product line have been consolidated into our Adhesives and Performance Chemicals product lines to better align customer portfolio and end usage. We have adjusted the presentations for the year ended December 31, 2017 to conform to the respective 2019 and 2018 presentations. Years Ended December 31, 2019 2018 2017 Revenue (In thousands) Adhesives $ 262,941 $ 280,867 $ 294,467 Performance Chemicals 438,146 461,100 416,264 Tires 50,381 48,122 49,955 Chemical Product Line Revenue $ 751,468 $ 790,089 $ 760,686
Schedule of Contract with Customer, Asset and Liability	December 31, 2019 December 31, 2018 (In thousands) Contract receivables (1) $ 190,093 $ 197,739 Contract liabilities (2) $ 12,456 $ 13,906 ____________________________________________________ (1) Contract receivables are recorded within receivables, net of allowances on our Consolidated Balance Sheets. This includes $20.4 million of contract receivables related to the Cariflex business recorded as current assets held for sale. (2) Our contract liability decreased by $1.2 million , as a result of meeting the performance obligation, which was recognized in our Specialty Polymers product line revenue, and decreased approximately $0.3 million due to the change in currency exchange rates.

Assets Held for Sale (Tables)

Assets Held for Sale (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Schedule of Disposal Groups	The following are the major classes of assets and liabilities for this business that were reflected in our balance sheet as assets and liabilities held for sale at December 31, 2019. December 31, 2019 (In thousands) ASSETS Receivables, net of allowances of $51 $ 20,397 Inventories of products, net 27,030 Inventories of materials and supplies, net 965 Prepaid expenses 1,913 Other current assets 1,051 Property, plant, and equipment, less accumulated depreciation of $27,146 26,891 Other long-term assets 93 Long-term operating lease assets, net 74 Total assets $ 78,414 LIABILITIES Accounts payable-trade 9,180 Other payables and accruals 5,669 Long-term operating lease liabilities 3 Total liabilities 14,852 Net assets $ 63,562

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract]
Schedule of unrecognized compensation expense	Our unrecognized compensation expense related to our share-based awards was as follows as of December 31, 2019 : Unrecognized Compensation Expense Weighted Average Remaining Recognition Period (In thousands) Restricted stock awards $ 1,675 0.58 Restricted stock units $ 4,993 1.61 Performance stock units $ 6,140 1.15
Schedule of option activity	Non-qualified option activities for the year ended December 31, 2019 are as follows: Options Weighted Average Exercise Price Aggregate (1) Weighted Average Remaining Contractual Term (In thousands) (In thousands) Outstanding at December 31, 2018 503 $ 28.12 Granted — — Exercised (116 ) 20.83 Forfeited — — Expired — — Outstanding and exercisable at December 31, 2019 387 $ 30.31 $ 157 2.30 ________________________________________________ (1) The intrinsic value of a stock option is the amount by which the market value of the underlying stock exceeds the exercise price of the option as of December 31, 2019 .
Summary of additional information regarding outstanding and exercisable options	Years Ended December 31, 2019 2018 2017 (In thousands) Options exercised 116 173 469 Total intrinsic value of options exercised $ 623 $ 1,050 $ 11,667
Schedule of non-vested restricted stock awards, restricted share units	The following table represents the non-vested restricted stock awards and restricted stock units granted, vested, and forfeited during 2019 . Restricted Stock Awards Restricted Stock Units Shares Weighted- Shares Weighted- (In thousands) (In thousands) Non-vested shares at December 31, 2018 381 $ 28.39 106 $ 26.22 Granted 23 35.78 192 34.65 Vested (161 ) 18.83 (36 ) 17.91 Forfeited (15 ) 38.57 (12 ) 35.69 Non-vested shares at December 31, 2019 228 $ 35.25 249 $ 32.74
Schedule of non-vested performance-based units activity	The following table represents the non-vested performance share units granted, vested, and forfeited during 2019 . Shares (2) Weighted- average Grant-date Fair Value Aggregate (1) Weighted Average Remaining Contractual Term (In thousands) (In thousands) Non-vested shares at December 31, 2018 436 $ 30.18 Granted 138 48.04 Vested (67 ) 19.12 Forfeited (129 ) 17.40 Non-vested shares at December 31, 2019 378 $ 43.08 $ 9,463 1.15 ________________________________________________ (1) The intrinsic value of a performance share unit is the amount by which the market value of the underlying performance share unit exceeds the grant date value of the performance share unit as of December 31, 2019 . (2) During the year ended December 31, 2019 , the 2016 performance share unit awards vested with an incremental 16,369 shares awarded based on performance metrics attained.
Summary of weighted-average assumptions for performance shares pricing	The weighted average fair value using a Monte Carlo simulation model and the corresponding weighted average assumptions for the performance share units granted were as follows: 2019 2018 2017 Risk-free interest rate 2.51 % 2.36 % 1.55 % Expected dividend yield — % — % — % Expected volatility 32.2 % 36.6 % 37.4 % Fair value per performance share award $ 60.68 $ 61.30 $ 34.84

Detail of Certain Balance She_2

Detail of Certain Balance Sheet Accounts Detail of Certain Balance Sheet Accounts (Tables)	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Detail of certain balance sheet accounts - assets	December 31, 2019 2018 (In thousands) Inventories of products: Finished products $ 255,406 $ 315,361 Work in progress 4,589 5,781 Raw materials 80,647 97,550 Inventories of products, gross 340,642 418,692 Inventory reserves (8,185 ) (8,052 ) Inventories of products, net $ 332,457 $ 410,640 Property, plant, and equipment: Land $ 38,494 $ 37,799 Buildings 182,873 178,245 Plant and equipment (1) 1,270,646 1,236,163 Construction in progress 73,124 87,054 Property, plant, and equipment 1,565,137 1,539,261 Less accumulated depreciation 639,197 597,785 Property, plant, and equipment, net of accumulated depreciation $ 925,940 $ 941,476 Intangible assets: Contractual agreements $ 261,923 $ 262,624 Technology 145,663 145,698 Customer relationships 60,291 60,359 Tradenames/trademarks 80,638 80,557 Software 63,181 59,448 Intangible assets 611,696 608,686 Less accumulated amortization: Contractual agreements 87,576 65,958 Technology 68,132 62,019 Customer relationships 38,760 37,409 Tradenames/trademarks 48,162 42,797 Software 43,189 38,465 Accumulated amortization 285,819 246,648 Intangible assets, net of accumulated amortization $ 325,877 $ 362,038 ________________________________________________ (1) Plant and equipment, net of depreciation, includes $3.4 million and $4.1 million of assets related to capital leases as of December 31, 2019 and December 31, 2018 , respectively.
Detail of certain balance sheet accounts - other liabilities and accumulated other comprehensive loss	December 31, 2019 2018 (In thousands) Other payables and accruals: Employee related $ 25,233 $ 35,015 Short-term operating lease liabilities 20,908 — Interest payable 16,289 2,201 Property, plant, and equipment accrual 13,259 10,982 Customer related 10,329 11,441 Other 26,627 41,056 Total other payables and accruals $ 112,645 $ 100,695 Other long-term liabilities: Pension and other postretirement benefits $ 126,386 $ 122,194 Long-term tax liability 21,022 24,875 Deferred income 11,049 23,616 Other 14,503 12,208 Total other long-term liabilities $ 172,960 $ 182,893
Estimated amortization expense	Estimated amortization expense for each of the next five years is as follows: December 31: Amortization Expense (In thousands) 2020 $ 41,815 2021 $ 39,182 2022 $ 37,435 2023 $ 36,445 2024 $ 36,231
Changes in accumulated other comprehensive income (loss)	Changes in accumulated other comprehensive income (loss) by component were as follows: Cumulative Foreign Currency Translation Cash Flow Hedges, Net of Tax Net Investment Hedges, Net of Tax Benefit Plans Liability, Net of Tax Total (In thousands) Balance at December 31, 2017 $ (9,654 ) $ 4,550 $ (1,926 ) $ (91,265 ) $ (98,295 ) Other comprehensive income (loss) before reclassifications (14,439 ) 1,368 8,079 10,317 5,325 Amounts reclassified to (income) expense from accumulated other comprehensive loss — (1,996 ) (2) — 3,267 (1) 1,271 Net other comprehensive income (loss) for the year (14,439 ) (628 ) 8,079 13,584 6,596 Balance at December 31, 2018 (24,093 ) 3,922 6,153 (77,681 ) (91,699 ) Other comprehensive income (loss) before reclassifications (5,296 ) (6,311 ) 7,471 (7,071 ) (11,207 ) Amounts reclassified to income from accumulated other comprehensive income — — — (2,889 ) (1) (2,889 ) Net other comprehensive income (loss) for the year (5,296 ) (6,311 ) 7,471 (9,960 ) (14,096 ) Balance at December 31, 2019 $ (29,389 ) $ (2,389 ) $ 13,624 $ (87,641 ) $ (105,795 ) ________________________________________________ (1) The reclassifications from accumulated other comprehensive income (loss) is for the change in benefit plans liability represents amortization of net actuarial losses and prior service costs. These costs are allocated between cost of goods sold, selling, general, and administrative and research and development expenses in the Consolidated Statement of Operations. See Note 13 Employee Benefits for further information related to net periodic benefit cost for pension and other post-retirement benefit plans. (2)

Earnings per Share ("EPS") (Tab

Earnings per Share ("EPS") (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Calculations of basic and diluted EPS	The calculations of basic and diluted EPS are as follows: Year Ended December 31, 2019 Net Weighted Earnings (In thousands, except per share data) Basic: As reported $ 51,305 31,828 Amounts allocated to unvested restricted shares (399 ) (247 ) Amounts available to common stockholders 50,906 31,581 $ 1.61 Diluted: Amounts allocated to unvested restricted shares 399 247 Non participating share units 259 Stock options added under the treasury stock method 41 Amounts reallocated to unvested restricted shares (395 ) (247 ) Amounts available to stockholders and assumed conversions $ 50,910 31,881 $ 1.60 Year Ended December 31, 2018 Net Weighted Earnings (In thousands, except per share data) Basic: As reported $ 67,015 31,878 Amounts allocated to unvested restricted shares (972 ) (462 ) Amounts available to common stockholders 66,043 31,416 $ 2.10 Diluted: Amounts allocated to unvested restricted shares 972 462 Non participating share units 168 Stock options added under the treasury stock method 205 Amounts reallocated to unvested restricted shares (961 ) (462 ) Amounts available to stockholders and assumed conversions $ 66,054 31,789 $ 2.08 Year Ended December 31, 2017 Net Weighted Earnings (In thousands, except per share data) Basic: As reported $ 97,549 31,241 Amounts allocated to unvested restricted shares (1,832 ) (587 ) Amounts available to common stockholders 95,717 30,654 $ 3.12 Diluted: Amounts allocated to unvested restricted shares 1,832 587 Non participating share units 170 Stock options added under the treasury stock method 316 Amounts reallocated to unvested restricted shares (1,804 ) (587 ) Amounts available to stockholders and assumed conversions $ 95,745 31,140 $ 3.07

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of long-term debt	Long-term debt consists of the following: December 31, 2019 December 31, 2018 Principal Discount Debt Issuance Cost Total Principal Discount Debt Issuance Cost Total (In thousands) USD Tranche $ 290,000 $ (5,057 ) $ (6,985 ) $ 277,958 $ 362,000 $ (7,395 ) $ (10,171 ) $ 344,434 Euro Tranche 277,134 — (3,237 ) 273,897 342,900 — (4,711 ) 338,189 7.0% Senior Notes 394,750 — (5,846 ) 388,904 399,060 — (6,622 ) 392,438 5.25% Senior Notes 325,378 — (4,879 ) 320,499 331,470 — (5,503 ) 325,967 ABL Facility — — — — 5,000 — — 5,000 KFPC Loan Agreement 82,375 — (33 ) 82,342 112,489 — (94 ) 112,395 KFPC Revolving Credit Facilities 20,010 — — 20,010 13,012 — — 13,012 Capital lease obligation 1,015 — — 1,015 1,184 — — 1,184 Total debt 1,390,662 (5,057 ) (20,980 ) 1,364,625 1,567,115 (7,395 ) (27,101 ) 1,532,619 Less current portion of total debt 53,139 — — 53,139 45,321 — — 45,321 Long-term debt $ 1,337,523 $ (5,057 ) $ (20,980 ) $ 1,311,486 $ 1,521,794 $ (7,395 ) $ (27,101 ) $ 1,487,298
Schedule of principal payments on outstanding total debt	Debt Maturities. The principal payments on our outstanding total debt as of December 31, 2019 , are as follows: December 31: Principal Payments (In thousands) 2020 $ 53,139 2021 33,140 2022 16,677 2023 215 2024 229 Thereafter 1,287,262 Total debt $ 1,390,662

Fair Value Measurements, Fina_2

Fair Value Measurements, Financial Instruments, and Credit Risk (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Summary of fair value measurements at reporting date	Our assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of their fair value and their placement within the fair value hierarchy. Fair Value Measurements at Reporting Date Using Balance Sheet Location December 31, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) (In thousands) Derivative asset – current Other current assets $ 14 $ — $ 14 Derivative asset – noncurrent Other long-term assets 32 — 32 Retirement plan asset—noncurrent Other long-term assets 2,547 2,547 — Derivative liability – current Other payables and accruals (170 ) — (170 ) Total $ 2,423 $ 2,547 $ (124 ) Fair Value Measurements at Reporting Date Using Balance Sheet Location December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) (In thousands) Derivative asset – current Other current assets $ 1,558 $ — $ 1,558 Derivative asset – noncurrent Other long-term assets 3,635 — 3,635 Retirement plan asset—noncurrent Other long-term assets 2,485 2,485 — Derivative liability – current Other payables and accruals (13 ) — (13 ) Total $ 7,665 $ 2,485 $ 5,180
Summary of carrying values and approximate fair values of long-term debt	The following table presents the carrying values and approximate fair values of our debt. December 31, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value (In thousands) USD Tranche (significant other observable inputs – level 2) $ 290,000 $ 290,183 $ 362,000 $ 352,498 Euro Tranche (significant other observable inputs – level 2) $ 277,134 $ 277,827 $ 342,900 $ 338,830 7.0% Senior Notes (quoted prices in active market for identical assets – level 1) $ 394,750 $ 406,214 $ 399,060 $ 369,561 5.25% Senior Notes (quoted prices in active market for identical assets – level 1) $ 325,378 $ 338,364 $ — $ 299,125 ABL Facility (significant other observable inputs – level 2) $ — $ — $ 5,000 $ 5,000 Capital lease obligation (significant other observable inputs – level 2) $ 1,015 $ 1,015 $ 1,184 $ 1,184 KFPC Loan Agreement (significant unobservable inputs – level 3) $ 82,375 $ 82,375 $ 112,489 $ 112,489 KFPC Revolving Credit Facilities (significant unobservable inputs – level 3) $ 20,010 $ 20,010 $ 13,012 $ 13,012

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Expense for Income Taxes	The provision for income taxes is comprised of the following: Years Ended December 31, 2019 2018 2017 (In thousands) Current tax benefit (expense): U.S. $ 13,968 $ (22,158 ) $ (522 ) Foreign (2,314 ) (7,903 ) (7,598 ) Current tax benefit (expense) 11,654 (30,061 ) (8,120 ) Deferred tax benefit (expense): U.S. (1,621 ) 18,868 57,248 Foreign 1,780 7,619 8,756 Deferred tax benefit (expense) 159 26,487 66,004 Income tax benefit (expense) $ 11,813 $ (3,574 ) $ 57,884
Income Before Income Taxes	Income (loss) before income taxes is comprised of the following: Years Ended December 31, 2019 2018 2017 (In thousands) Income (loss) before income taxes: U.S. $ 1,998 $ 10,605 $ (17,177 ) Foreign 42,006 63,490 51,939 Income before income taxes $ 44,004 $ 74,095 $ 34,762
Reconciliation of Statutory Income Tax Rate	The provision for income taxes differs from the amount computed by applying the U.S. corporate statutory income tax rate to income (loss) before income taxes for the reasons set forth below: Years Ended December 31, 2019 2018 2017 Income taxes at the statutory rate (21.0 )% (21.0 )% (35.0 )% Foreign tax rate differential 5.1 15.3 45.8 State taxes, net of federal benefit (0.1 ) (0.5 ) 1.1 Permanent differences 8.7 10.9 26.7 Tax credits 3.6 (0.1 ) 7.6 Alternative minimum tax — — (7.6 ) Uncertain tax positions 40.3 (8.3 ) 1.8 Valuation allowance 10.6 8.8 (4.8 ) Deferred tax rate change and transition tax (7.7 ) 14.4 — U.S. minimum tax on foreign entities (17.8 ) (16.2 ) 140.1 Other 5.1 (8.0 ) (9.1 ) Effective tax rate 26.8 % (4.7 )% 166.6 %
Significant Components of Deferred Tax Assets and Liabilities	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, as well as net operating loss and tax credit carryforwards. The tax effects of temporary differences are comprised of the following: December 31, 2019 2018 (In thousands) Deferred tax assets: Net operating loss carryforwards $ 49,634 $ 60,718 Interest carryforwards 30,429 26,615 Tax credit carryforwards 10,301 8,261 Inventory 8,100 6,760 Benefit plans accrual 25,219 26,027 Operating leases 17,543 — Other accruals and reserves 4,782 4,739 Valuation allowance for deferred tax assets (38,440 ) (42,489 ) Deferred tax assets 107,568 90,631 Deferred tax liabilities: Property, plant, and equipment 112,454 105,097 Intangible assets 76,293 84,571 Operating leases 16,842 — Investment in subsidiaries 18,356 18,356 Deferred tax liabilities 223,945 208,024 Net deferred tax liabilities $ 116,377 $ 117,393 December 31, 2019 2018 (In thousands) Net deferred tax liabilities consist of: Non-current deferred tax assets $ 8,863 $ 10,434 Non-current deferred tax liabilities 125,240 127,827 Net deferred tax liabilities $ 116,377 $ 117,393
Rollforward of Unrecognized Tax Benefits	The following presents a roll forward of our unrecognized tax benefits including associated interest and penalties. December 31, 2019 2018 (In thousands) Balance at January 1 $ 29,603 $ 24,421 Increase in current year tax positions 185 5,332 Increase in prior year tax positions 710 1,442 Decrease in prior year tax positions (18,143 ) (5 ) Lapse of statute of limitations (1,061 ) (1,587 ) Balance at December 31 $ 11,294 $ 29,603

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Lease, Cost	The components of lease cost for operating leases are as follows: Year Ended December 31, 2019 (In thousands) Lease cost $ 23,093 Variable lease cost 543 Operating lease expense $ 23,636
Schedule Of Lease By Asset Type	The operating lease liabilities on a discounted basis arising from obtaining ROU assets as of December 31, 2019 were comprised as follows: Leased Asset Class Polymer Chemical Percentage Average Months Remaining on the Lease Weighted Average in Months (in thousands) Railcars $ 1,676 $ 21,946 27.0 % 44 11.8 Buildings 29,181 8,357 42.9 % 36 15.6 Equipment 3,338 9,864 15.1 % 36 5.5 Land 6,916 42 7.9 % 380 30.2 Other 712 5,500 7.1 % 19 1.3 Total $ 41,823 $ 45,709 64.4
Lessee, Operating Lease, Liability, Maturity	The following tables show the undiscounted cash flows for the operating lease liabilities. December 31, 2019 (In thousands) 2020 $ 23,310 2021 17,629 2022 13,087 2023 9,665 2024 6,264 Thereafter 27,860 Total undiscounted operating lease liabilities 97,815 Present value discount (10,400 ) Foreign currency and other 117 Total discounted operating lease liabilities $ 87,532
Schedule of Future Minimum Rental Payments for Operating Leases	December 31, 2018 (In thousands) 2019 $ 19,065 2020 16,891 2021 12,385 2022 8,284 2023 5,137 Thereafter 8,498 Total undiscounted operating lease liabilities $ 70,260
Changes in the aggregate carrying amount of ARO liability	The changes in the aggregate carrying amount of our ARO liability are as follows: December 31, 2019 2018 (In thousands) Beginning balance $ 5,703 $ 5,712 Additional accruals 772 — Accretion expense 343 330 Obligations settled (206 ) (91 ) Foreign currency translation (89 ) (248 ) Ending balance $ 6,523 $ 5,703

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Plan Obligation, Plan Assets, Amounts Recognized in Financial Statements and Underlying Actuarial and Other Assumptions	Information concerning the pension obligation, plan assets, amounts recognized in our financial statements, and underlying actuarial and other assumptions are as follows: U.S. Plans Non-U.S. Plans December 31, December 31, 2019 2018 2019 2018 (In thousands) Change in benefit obligation: Benefit obligation at beginning of period $ 177,589 $ 189,151 $ 81,108 $ 94,205 Service cost 2,671 3,221 1,491 2,504 Interest cost 7,781 7,200 2,112 2,073 Participant contributions — — 215 180 Benefits paid (7,354 ) (6,588 ) (3,577 ) (4,248 ) Expenses and taxes — — — — Plan amendments (12,507 ) — (321 ) 625 Settlements — — (400 ) — Actuarial (gain) loss 26,717 (15,395 ) 13,070 (9,641 ) Exchange rate (gain) loss — — 1,567 (4,590 ) Benefit obligation at end of period 194,897 177,589 95,265 81,108 Change in plan assets: Fair value at beginning of period 110,899 121,831 45,024 48,401 Return on plan assets 20,849 (11,801 ) 5,926 (2,150 ) Employer contributions 7,586 7,457 4,067 5,385 Participant contributions — — 215 180 Benefits paid (7,354 ) (6,588 ) (3,577 ) (4,248 ) Expenses and taxes — — — — Settlements — — (400 ) — Exchange rate (gain) loss — — 1,425 (2,544 ) Fair value at end of period 131,980 110,899 52,680 45,024 Funded status at end of period $ (62,917 ) $ (66,690 ) $ (42,585 ) $ (36,084 ) Amounts recognized on balance sheet: Current liabilities $ — $ — $ (2,323 ) $ (2,123 ) Noncurrent liabilities (62,917 ) (66,690 ) (40,262 ) (33,961 ) $ (62,917 ) $ (66,690 ) $ (42,585 ) $ (36,084 ) Amounts recognized in accumulated other comprehensive loss: Prior service costs $ — $ — $ 573 $ 919 Net actuarial loss 58,505 58,567 20,495 11,014 Amounts recognized in accumulated other comprehensive loss $ 58,505 $ 58,567 $ 21,068 $ 11,933 Accumulated benefit obligations $ 194,887 $ 167,678 $ 91,152 $ 77,638 Information concerning the plan obligation, the funded status and amounts recognized in our financial statements and underlying actuarial and other assumptions are as follows: December 31, 2019 2018 (In thousands) Change in benefit obligation (1) : Benefit obligation at beginning of period $ 22,824 $ 35,851 Service cost 290 490 Interest cost 941 1,224 Benefits and expenses paid (premiums) (2,055 ) (2,081 ) Actuarial (gain) loss 1,979 (1,076 ) Plan amendments — (11,584 ) Benefit obligation at end of period 23,979 22,824 Change in plan assets (2) : Fair value at beginning of period — — Employer contributions 2,055 2,081 Benefits paid (2,055 ) (2,081 ) Fair value at end of period — — Funded status at end of year $ (23,979 ) $ (22,824 ) ___________________________________________ (1) During the year ended December 31, 2018, we amended the post-retirement benefits plan for post-65 retirees to provide an annual subsidy based on years of service. The annual subsidy replaces a company-sponsored medical plan. This plan modification resulted in a $13.1 million reduction in pension and other post-retirement liabilities during the year ended December 31, 2018. (2) Shell Chemicals has committed to a future cash payment related to retiree medical expenses based on a specified dollar amount per employee, if certain contractual commitments are met. We have recorded an asset of approximately $5.7 million and $6.8 million as our estimate of the present value of this commitment as of December 31, 2019 and 2018 , respectively. December 31, 2019 2018 (In thousands) Amounts recognized in the balance sheet: Current liabilities $ (1,446 ) $ (1,478 ) Noncurrent liabilities (22,533 ) (21,346 ) $ (23,979 ) $ (22,824 ) Amounts recognized in accumulated other comprehensive loss: Prior service cost $ (9,254 ) $ (11,002 ) Net actuarial loss $ 9,833 $ 8,476 $ 579 $ (2,526 )
Estimated Future Benefit Payments	The following employer contributions and benefit payments, which reflect expected future service, as appropriate, are expected to be paid: Retiree Medical Plan (In thousands) Employer Contributions 2020 Employer contribution $ 1,470 Benefit Payments 2020 $ 1,470 2021 1,450 2022 1,430 2023 1,430 2024 1,430 Years 2024-2028 7,130 $ 14,340 The following employer contributions and benefit payments, which reflect expected future service, as appropriate, are expected to be paid: U.S. Plans Non-U.S. Plans (In thousands) Employer Contributions 2020 Employer contribution $ 9,625 $ 3,802 Benefit Payments 2020 $ 7,751 $ 3,819 2021 8,040 3,516 2022 8,409 3,654 2023 8,752 3,924 2024 9,062 3,865 Years 2024-2028 50,212 21,123 $ 92,226 $ 39,901
Components of Net Periodic Pension Costs	Net periodic benefit costs consist of the following components: Years Ended December 31, 2019 2018 2017 (In thousands) Service cost $ 290 $ 490 $ 557 Interest cost 941 1,224 1,370 Amortization of prior service cost (1,747 ) (582 ) — Amortization of net actuarial loss 621 742 598 Net periodic benefit costs $ 105 $ 1,874 $ 2,525 U.S. Plans Non-U.S. Plans Years Ended December 31, Years Ended December 31, 2019 2018 2017 2019 2018 2017 (In thousands) Service cost benefits earned during the period $ 2,671 $ 3,221 $ 3,191 $ 1,491 $ 2,504 $ 2,749 Interest on prior year’s projected benefit obligation 7,781 7,200 7,330 2,112 2,073 2,195 Expected return on plan assets (10,065 ) (9,808 ) (9,401 ) (2,520 ) (2,685 ) (2,575 ) One-time settlement costs — — — 56 — 45 Amortization of prior service costs — — — 34 13 11 Amortization of net actuarial loss 3,487 4,650 3,622 419 645 165 Net periodic pension costs $ 3,874 $ 5,263 $ 4,742 $ 1,592 $ 2,550 $ 2,590
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss)	The estimated losses that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost in fiscal 2020 are as follows: U.S. Plans Non-U.S. Plans (In thousands) Amortization of prior service costs $ — $ 17 Amortization of net actuarial loss 1,600 1,011 $ 1,600 $ 1,028
Weighted Average Assumptions used to Determine Benefit Obligation and Net Periodic Benefit Cost	December 31, 2019 2018 Weighted average assumptions used to determine benefit obligations: Measurement date 12/31/2019 12/31/2018 Discount rate 3.34 % 4.36 % Rates of increase in salary compensation level N/A N/A Weighted average assumptions used to determine net periodic benefit cost: Discount rate 4.36 % 3.94 % Rates of increase in salary compensation level N/A N/A Expected long-term rate of return on plan assets N/A N/A U.S. Plans Non-U.S. Plans December 31, December 31, 2019 2018 2019 2018 Weighted average assumptions used to determine benefit obligations: Discount rate 3.45 % 4.45 % 1.79 % 2.63 % Rates of increase in salary compensation level 3.00 % 3.00 % 2.96 % 2.98 % Expected long-term rate of return on plan assets 7.00 % 8.00 % 5.24 % 5.49 % Weighted average assumptions used to determine net periodic benefit cost: Discount rate 4.45 % 3.86 % 2.63 % 2.29 % Rates of increase in salary compensation level 3.00 % 3.00 % 2.98 % 3.15 % Expected long-term rate of return on plan assets 8.00 % 8.00 % 5.49 % 5.49 %
Pension Plan Asset Allocations by Asset Category	Our Pension Plan asset allocations at December 31, 2019 and 2018 by asset category are as follows: U.S. Plans Non-U.S. Plans Target Allocation Percentage of Plan Target Allocation Percentage of Plan 2019 2019 2018 2019 2019 2018 Equity 50.0 % 68.1 % 59.5 % 50.0 % 42.1 % 46.9 % Debt 30.0 31.9 40.0 50.0 53.7 48.4 Other 20.0 — 0.5 — 4.2 4.7 Total 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 %
Fair Values of Pension Plan Assets by Asset Category	A summary of total investments for our pension plan assets measured at fair value is presented below. See Note 9 Fair Value Measurements, Financial Instruments, and Credit Risk to the consolidated financial statements for a detailed description of fair value measurements and the hierarchy established for Level 1, 2, and 3 valuation inputs. Pension Plan Assets Fair Value Measurements at December 31, 2019 Total Quoted Prices In Active Markets Identical Assets (Level 1) Significant Observable Inputs (Level 2) (1) Significant Unobservable Inputs (Level 3) (In thousands) Equity $ 112,094 $ 56,220 $ 55,874 $ — Debt 70,358 12,745 57,613 — Other 2,208 963 944 301 Total $ 184,660 $ 69,928 $ 114,431 $ 301 ___________________________________________ (1) Included are plan assets valued using the net asset value practical expedient of $63.0 million . Pension Plan Assets Fair Value Measurements at December 31, 2018 Total Quoted Prices In Active Markets Identical Assets (Level 1) Significant Observable Inputs (Level 2) (1) Significant Unobservable Inputs (Level 3) (In thousands) Equity $ 87,159 $ 43,867 $ 43,292 $ — Debt 66,098 19,344 46,754 — Other 2,666 2,412 — 254 Total $ 155,923 $ 65,623 $ 90,046 $ 254 ___________________________________________ (1) Included are plan assets valued using the net asset value practical expedient of $47.1 million .
Assumed Health Care Cost Trend Rates	December 31, 2019 2018 Assumed Pre-65 health care cost trend rates: Health care cost trend rate assumed for next year 7.50 % 8.00 % Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 4.50 % 4.50 % Year that the rate reaches the ultimate trend rate 2026 2026 December 31, 2019 2018 Assumed Post-65 health care cost trend rates: Health care cost trend rate assumed for next year N/A N/A Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) N/A N/A Year that the rate reaches the ultimate trend rate N/A N/A
Effect of One Percentage Point Change in Assumed Health Care Cost Trend Rates	A 1.0% change in assumed health care cost trend rates would have the following effect (in thousands): 1% Increase 1% Decrease Effect on total of service and interest cost components $ 1 $ (3 ) Effect on postretirement benefit obligation $ 36 $ (48 )

Industry Segment and Foreign _2

Industry Segment and Foreign Operations (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Sales Revenue for Primary Product Lines	Operating Results by Segment Year Ended December 31, 2019 Year Ended December 31, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Revenue $ 1,052,968 $ 751,468 $ 1,804,436 $ 1,221,586 $ 790,089 $ 2,011,675 Cost of goods sold 820,410 569,597 1,390,007 872,506 558,563 1,431,069 Gross profit 232,558 181,871 414,429 349,080 231,526 580,606 Operating expenses: Research and development 29,392 11,681 41,073 28,957 12,339 41,296 Selling, general, and administrative 86,025 63,775 149,800 89,753 64,144 153,897 Depreciation and amortization 59,151 77,020 136,171 71,006 70,404 141,410 Gain on insurance proceeds — (32,850 ) (32,850 ) — (8,900 ) (8,900 ) Loss on disposal of fixed assets 647 126 773 202 1,967 2,169 Operating income $ 57,343 $ 62,119 119,462 $ 159,162 $ 91,572 250,734 Other income (expense) 3,339 (3,472 ) Loss on extinguishment of debt (3,521 ) (79,866 ) Earnings of unconsolidated joint venture 506 471 Interest expense, net (75,782 ) (93,772 ) Income before income taxes $ 44,004 $ 74,095 Year Ended December 31, 2017 Polymer Chemical Total (In thousands) Revenue $ 1,199,676 $ 760,686 $ 1,960,362 Cost of goods sold 887,096 528,563 1,415,659 Gross profit 312,580 232,123 544,703 Operating expenses: Research and development 28,387 11,896 40,283 Selling, general, and administrative 94,592 66,668 161,260 Depreciation and amortization 67,998 69,164 137,162 Loss on disposal of fixed assets 514 — 514 Operating income $ 121,089 $ 84,395 205,484 Other expense (3,360 ) Loss on extinguishment of debt (35,389 ) Earnings of unconsolidated joint venture 486 Interest expense, net (132,459 ) Income before income taxes $ 34,762
Schedule of Assets by Segments	Long-Lived Assets Including Goodwill and Total Assets December 31, 2019 December 31, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Property, plant, and equipment, net $ 526,692 $ 399,248 $ 925,940 $ 543,086 $ 398,390 $ 941,476 Investment in unconsolidated joint venture $ 11,971 $ — $ 11,971 $ 12,070 $ — $ 12,070 Goodwill (1) $ — $ 772,418 $ 772,418 $ — $ 772,886 $ 772,886 Total assets $ 1,097,691 $ 1,734,694 $ 2,832,385 $ 1,160,029 $ 1,734,675 $ 2,894,704 ________________________________________________ (1) Changes in goodwill are due to the change in currency exchange rates.
Sales Revenue by Geographic Region	Revenue by Geographic Region December 31, 2019 December 31, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Revenue: United States $ 352,735 $ 317,347 $ 670,082 $ 412,308 $ 325,193 $ 737,501 Germany 107,661 51,598 159,259 141,451 53,908 195,359 All other countries 592,572 382,523 975,095 667,827 410,988 1,078,815 $ 1,052,968 $ 751,468 $ 1,804,436 $ 1,221,586 $ 790,089 $ 2,011,675 December 31, 2017 Polymer Chemical Total (In thousands) Revenue: United States $ 373,103 $ 317,144 $ 690,247 Germany 139,256 59,820 199,076 All other countries 687,317 383,722 1,071,039 $ 1,199,676 $ 760,686 $ 1,960,362
Long-Lived Assets by Geographic Region	Long-Lived Assets by Geographic Region December 31, 2019 December 31, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Long-lived assets, at cost: United States $ 568,710 $ 385,235 $ 953,945 $ 541,017 $ 357,126 $ 898,143 Taiwan 183,963 — 183,963 178,363 — 178,363 France 144,785 13,153 157,938 138,659 11,751 150,410 Brazil 24,351 — 24,351 76,454 — 76,454 Germany 70,617 5,170 75,787 68,231 4,911 73,142 All other countries 44,969 124,184 169,153 45,671 117,078 162,749 $ 1,037,395 $ 527,742 $ 1,565,137 $ 1,048,395 $ 490,866 $ 1,539,261

Variable Interest Entity (Table

Variable Interest Entity (Tables)	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Fair Value and Carrying Value of Assets and Liabilities	The following table summarizes the carrying amounts of assets and liabilities as of December 31, 2019 and 2018 for KFPC before intercompany eliminations. See Note 8 Long Term Debt , for further discussion related to the KFPC Loan Agreement executed on July 17, 2014. December 31, 2019 December 31, 2018 (In thousands) Cash and cash equivalents $ 10,402 $ 6,640 Other current assets 14,847 18,363 Property, plant, and equipment 155,153 159,893 Intangible assets 8,133 8,590 Long-term operating lease assets, net 7,044 — Other long-term assets 2,147 11,838 Total assets $ 197,726 $ 205,324 Current portion of long-term debt $ 52,961 $ 45,152 Current liabilities 12,801 14,996 Long-term debt 49,391 80,255 Long-term operating lease liabilities 6,603 — Total liabilities $ 121,756 $ 140,403

Selected Quarterly Financial _2

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financials Data	The following table sets forth a summary of our quarterly financial information for each of the four quarters ended December 31, 2019 and December 31, 2018 : First Quarter (1) Second Quarter (2) Third Quarter (3) Fourth Quarter (4) Total (In thousands, except per share data) 2019 Revenue $ 456,411 $ 495,280 $ 444,221 $ 408,524 $ 1,804,436 Gross profit $ 107,002 $ 129,202 $ 101,279 $ 76,946 $ 414,429 Operating income $ 35,135 $ 56,168 $ 38,103 $ (9,944 ) $ 119,462 Net income (loss) attributable to Kraton $ 12,668 $ 41,208 $ 18,693 $ (21,264 ) $ 51,305 Earnings (loss) per common share Basic $ 0.40 $ 1.29 $ 0.59 $ (0.67 ) $ 1.61 Diluted $ 0.39 $ 1.28 $ 0.58 $ (0.67 ) $ 1.60 Weighted average common shares outstanding Basic 31,633 31,692 31,486 31,516 31,581 Diluted 31,901 32,017 31,823 31,516 31,881 2018 Revenue $ 502,392 $ 538,395 $ 523,105 $ 447,783 $ 2,011,675 Gross profit $ 147,078 $ 170,709 $ 154,261 $ 108,558 $ 580,606 Operating income (loss) $ 62,155 $ 82,787 $ 72,394 $ 33,398 $ 250,734 Net income (loss) attributable to Kraton $ 22,072 $ (14,930 ) $ 42,349 $ 17,524 $ 67,015 Earnings (loss) per common share Basic $ 0.69 $ (0.47 ) $ 1.33 $ 0.55 $ 2.10 Diluted $ 0.68 $ (0.47 ) $ 1.31 $ 0.55 $ 2.08 Weighted average common shares outstanding Basic 31,241 31,441 31,459 31,520 31,416 Diluted 31,851 31,441 31,834 31,714 31,789 _______________________________________ (1) The first quarter of 2019 was positively impacted by a $11.1 million gain on insurance proceeds. The first quarter of 2018 was negatively impacted by a $7.6 million loss on extinguishment of debt. (2) The second quarter of 2019 was positively impacted by a $7.5 million gain on insurance proceeds. The second quarter of 2018 was negatively impacted by a $72.3 million loss on extinguishment of debt. (3) The third quarter of 2019 was positively impacted by a $14.3 million gain on insurance proceeds. (4) The fourth quarter of 2019 was negatively impacted by approximately $5.0 million largely related to the process to review strategic alternatives for our Cariflex business and a $3.7 million loss on extinguishment of debt. The fourth quarter of 2018 was negatively impacted by a loss on disposal of fixed assets and hurricane related costs totaling $13.7 million , partially offset by a gain on insurance proceeds of $8.9 million related to Hurricane Michael.

Description of Business, Basi_4

Description of Business, Basis of Presentation and Significant Accounting Policies - Narrative (Details) - segment	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Description Of Business Basis Of Presentation And Significant Accounting Policies [Line Items]
Number of operating segments	2
Expected dividend yield	0.00%	0.00%	0.00%
KFPC
Schedule Of Description Of Business Basis Of Presentation And Significant Accounting Policies [Line Items]
Percentage of investment in joint venture	50.00%
Styrenic Block Copolymer Joint Venture
Schedule Of Description Of Business Basis Of Presentation And Significant Accounting Policies [Line Items]
Percentage of investment in joint venture	50.00%

Description of Business, Basi_5

Description of Business, Basis of Presentation and Significant Accounting Policies - Estimated Useful Lives of Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2019
Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	20 years
Building and land improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	20 years
Manufacturing control equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	10 years
Office equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	5 years
Research equipment and facilities
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	5 years
Vehicles
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	5 years
Computer hardware and information systems
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	3 years

Description of Business, Basi_6

Description of Business, Basis of Presentation and Significant Accounting Policies - Estimated Useful Life of Assets (Details)	12 Months Ended
	Dec. 31, 2019
Technology
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of assets, years	15 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of assets, years	15 years
Tradenames/trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of assets, years	15 years
Software | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of assets, years	3 years
Software | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of assets, years	10 years

New Accounting Pronouncements (

New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Operating lease, ROU assets	$ 85,003	$ 70,900
Operating lease, liability		$ 70,900

Revenue Recognition - Narrative

Revenue Recognition - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract liabilities	$ 12,456	$ 13,906
Liability, revenue recognized	$ 5,600	$ 7,300

Revenue Recognition - Performan

Revenue Recognition - Performance Obligation (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01	Dec. 31, 2019
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, expected timing of satisfaction	1 year
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, expected timing of satisfaction	10 years

Revenue Recognition - Disaggreg

Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Polymer
Disaggregation of Revenue [Line Items]
Revenue	$ 1,052,968	$ 1,221,586	$ 1,199,676
Polymer | Performance Products
Disaggregation of Revenue [Line Items]
Revenue	531,437	631,728	640,313
Polymer | Specialty Polymers
Disaggregation of Revenue [Line Items]
Revenue	334,726	408,628	389,873
Polymer | Cariflex
Disaggregation of Revenue [Line Items]
Revenue	186,266	180,814	168,267
Polymer | Other
Disaggregation of Revenue [Line Items]
Revenue	539	416	1,223
Chemical
Disaggregation of Revenue [Line Items]
Revenue	751,468	790,089	760,686
Chemical | Adhesives
Disaggregation of Revenue [Line Items]
Revenue	262,941	280,867	294,467
Chemical | Performance Chemicals
Disaggregation of Revenue [Line Items]
Revenue	438,146	461,100	416,264
Chemical | Tires
Disaggregation of Revenue [Line Items]
Revenue	$ 50,381	$ 48,122	$ 49,955

Revenue Recognition - Contract

Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Contract receivables	$ 190,093	$ 197,739
Contract liabilities	12,456	13,906
Liability, revenue recognized	5,600	$ 7,300
Specialty Polymers | Polymer
Disaggregation of Revenue [Line Items]
Liability, revenue recognized	1,200
Effect of exchange rate differences on cash	300
Cariflex | Disposal Group
Disaggregation of Revenue [Line Items]
Assets held for sale, receivables	$ 20,397

Assets Held for Sale - Addition

Assets Held for Sale - Additional Information (Details) $ in Millions	Oct. 30, 2019USD ($)
Cariflex | Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration for certain assets sold	$ 530

Assets Held for Sale - Assets a

Assets Held for Sale - Assets and Liabilities to be Disposed of (Details) - Cariflex - Not Discontinued Operations $ in Thousands	Dec. 31, 2019USD ($)
ASSETS
Receivables, net of allowances of $51	$ 20,397
Inventories of products, net	27,030
Inventories of materials and supplies, net	965
Prepaid expenses	1,913
Other current assets	1,051
Property, plant, and equipment, less accumulated depreciation of $27,146	26,891
Other long-term assets	93
Long-term operating lease assets, net	74
Total assets	78,414
LIABILITIES
Accounts payable-trade	9,180
Other payables and accruals	5,669
Long-term operating lease liabilities	3
Total liabilities	14,852
Net assets	63,562
Allowance	51
Accumulated depreciation	$ 27,146

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	May 17, 2019	May 18, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense, net of tax	$ 9,500	$ 8,100	$ 7,600
Tax impact to share-based compensation expense	2,100	1,900	2,700
Proceeds from the exercise of stock options	2,424	$ 3,133	$ 10,952
Aggregate intrinsic value	$ 6,900
Weighted average remaining contractual terms	11 months 19 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period of options, years	10 years
Proceeds from the exercise of stock options	$ 2,400
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded shares (in shares)		108,076	180,666
Share units granted to employees (in shares)	23,000
Total fair value of shares vested	$ 6,700	$ 12,400	$ 7,400
Restricted stock awards | Board Of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock to members (in shares)	23,447	16,932	25,975
Restricted stock awards | Cliff Vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining recognition period	3 years	3 years	3 years
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share units granted to employees (in shares)	192,214	32,908	40,189
Restricted stock units | Cliff Vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining recognition period	3 years	3 years	3 years
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining recognition period	3 years
Share units granted to employees (in shares)	137,508	109,844	163,846
Aggregate intrinsic value	$ 9,463
Weighted average remaining contractual terms	1 year 1 month 24 days
Total fair value of shares vested	$ 2,400	$ 7,900
Performance stock units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of number of shares of common stock to initial grant value to be issued when performance shares units vest	0.00%
Performance stock units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of number of shares of common stock to initial grant value to be issued when performance shares units vest	200.00%
2016 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance (in shares)					4,697,702
Common stock available for issuance (in shares)	2,901,188	3,354,625
Inducement Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance (in shares)				150,000
Common stock available for issuance (in shares)	115,991

Share-Based Compensation - Unre

Share-Based Compensation - Unrecognized Compensation Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense	$ 1,675
Weighted Average Remaining Recognition Period	17 days
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense	$ 4,993
Weighted Average Remaining Recognition Period	1 year 7 months 9 days
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense	$ 6,140
Weighted Average Remaining Recognition Period	1 year 1 month 24 days

Share-Based Compensation - Opti

Share-Based Compensation - Option Activities (Detail) - Non-qualified Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)$ / sharesshares
Options
Outstanding beginning balance (in shares) | shares	503
Granted (in shares) | shares	0
Exercised (in shares) | shares	(116)
Forfeited (in shares) | shares	0
Expired (in shares) | shares	0
Outstanding ending balance (in shares) | shares	387
Weighted Average Exercise Price
Outstanding beginning balance (in dollars per share) | $ / shares	$ 28.12
Granted (in dollars per share) | $ / shares	0
Exercised (in dollars per share) | $ / shares	20.83
Forfeited (in dollars per share) | $ / shares	0
Expired (in dollars per share) | $ / shares	0
Outstanding ending balance (in dollars per share) | $ / shares	$ 30.31
Outstanding options, Aggregate Intrinsic Value | $	$ 157
Outstanding options, Weighted Average Remaining Contractual Term	2 years 3 months 18 days

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Additional Information Regarding Outstanding and Exercisable Options (Detail) - Stock Options - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised	$ 116	$ 173	$ 469
Total intrinsic value of options exercised	$ 623	$ 1,050	$ 11,667

Share-Based Compensation - Non-

Share-Based Compensation - Non-Vested Restricted Stock Awards, Restricted Share Units and Performance Share Units (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Weighted- average Grant-date Fair Value
Aggregate intrinsic value	$ 6,900
Weighted average remaining contractual terms	11 months 19 days
Restricted stock awards
Shares
Non-vested shares, beginning balance (in shares)	381,000
Granted (in shares)	23,000
Vested (in shares)	(161,000)
Forfeited (in shares)	(15,000)
Non-vested shares, ending balance (in shares)	228,000	381,000
Weighted- average Grant-date Fair Value
Non-vested shares, beginning balance (in dollars per share)	$ 28.39
Granted (in dollars per share)	35.78
Vested (in dollars per share)	18.83
Forfeited (in dollars per share)	38.57
Non-vested shares, ending balance (in dollars per share)	$ 35.25	$ 28.39
Restricted stock units
Shares
Non-vested shares, beginning balance (in shares)	106,000
Granted (in shares)	192,214	32,908	40,189
Vested (in shares)	(36,000)
Forfeited (in shares)	(12,000)
Non-vested shares, ending balance (in shares)	249,000	106,000
Weighted- average Grant-date Fair Value
Non-vested shares, beginning balance (in dollars per share)	$ 26.22
Granted (in dollars per share)	34.65
Vested (in dollars per share)	17.91
Forfeited (in dollars per share)	35.69
Non-vested shares, ending balance (in dollars per share)	$ 32.74	$ 26.22
Performance stock units
Shares
Non-vested shares, beginning balance (in shares)	436,000
Granted (in shares)	137,508	109,844	163,846
Vested (in shares)	(67,000)
Forfeited (in shares)	(129,000)
Non-vested shares, ending balance (in shares)	378,000	436,000
Weighted- average Grant-date Fair Value
Non-vested shares, beginning balance (in dollars per share)	$ 30.18
Granted (in dollars per share)	48.04
Vested (in dollars per share)	19.12
Forfeited (in dollars per share)	17.40
Non-vested shares, ending balance (in dollars per share)	$ 43.08	$ 30.18
Aggregate intrinsic value	$ 9,463
Weighted average remaining contractual terms	1 year 1 month 24 days
Incremental shares award (in shares)	16,369		47,006

Share-Based Compensation - Perf

Share-Based Compensation - Performance share units (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.51%	2.36%	1.55%
Expected dividend yield	0.00%	0.00%	0.00%
Expected volatility	32.20%	36.60%	37.40%
Fair value per performance share award (in dollars per share)	$ 60.68	$ 61.30	$ 34.84

Detail of Certain Balance She_3

Detail of Certain Balance Sheet Accounts - Inventories of Products and Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Inventories of products:
Finished products	$ 255,406	$ 315,361
Work in progress	4,589	5,781
Raw materials	80,647	97,550
Inventories of products, gross	340,642	418,692
Inventory reserves	(8,185)	(8,052)
Inventories of products, net	332,457	410,640
Property, plant, and equipment:
Land	38,494	37,799
Buildings	182,873	178,245
Plant and equipment	1,270,646	1,236,163
Construction in progress	73,124	87,054
Property, plant, and equipment	1,565,137
Property, plant, and equipment		1,539,261
Less accumulated depreciation	639,197
Less accumulated depreciation	639,197	597,785
Property, plant, and equipment, net of accumulated depreciation	925,940
Property, plant, and equipment, net of accumulated depreciation	925,940	941,476
Intangible assets:
Intangible assets	611,696	608,686
Accumulated amortization	285,819	246,648
Intangible assets, net of accumulated amortization	325,877	362,038
Assets Held under Capital Leases
Property, plant, and equipment:
Property, plant, and equipment, net of accumulated depreciation		4,100
Plant and Equipment
Intangible assets:
Operating lease, liability	3,400
Contractual agreements
Intangible assets:
Intangible assets	261,923	262,624
Accumulated amortization	87,576	65,958
Technology
Intangible assets:
Intangible assets	145,663	145,698
Accumulated amortization	68,132	62,019
Customer relationships
Intangible assets:
Intangible assets	60,291	60,359
Accumulated amortization	38,760	37,409
Tradenames/trademarks
Intangible assets:
Intangible assets	80,638	80,557
Accumulated amortization	48,162	42,797
Software
Intangible assets:
Intangible assets	63,181	59,448
Accumulated amortization	$ 43,189	$ 38,465

Detail of Certain Balance She_4

Detail of Certain Balance Sheet Accounts - Other Liabilities and Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other payables and accruals:
Employee related	$ 25,233	$ 35,015
Short-term operating lease liabilities	20,908
Interest payable	16,289	2,201
Property, plant, and equipment accrual	13,259	10,982
Customer related	10,329	11,441
Other	26,627	41,056
Total other payables and accruals	112,645	100,695
Other long-term liabilities:
Pension and other postretirement benefits	126,386	122,194
Long-term tax liability	21,022	24,875
Deferred income	11,049	23,616
Other	14,503	12,208
Total other long-term liabilities	$ 172,960	$ 182,893

Detail of Certain Balance She_5

Detail of Certain Balance Sheet Accounts - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Aggregate depreciation expense for property, plant and equipment	$ 89.9	$ 91.8	$ 84.5
Aggregate amortization expense for intangible assets	$ 46	$ 49.3	$ 52.4

Detail of Certain Balance She_6

Detail of Certain Balance Sheet Accounts - Estimated Amortization Expense (Details) $ in Thousands	Dec. 31, 2019USD ($)
Estimated amortization expense
2020	$ 41,815
2021	39,182
2022	37,435
2023	36,445
2024	$ 36,231

Detail of Certain Balance She_7

Detail of Certain Balance Sheet Accounts - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 747,599	$ 666,519	$ 490,237
Other comprehensive income (loss) before reclassifications	(11,207)	5,325
Amounts reclassified to (income) expense from accumulated other comprehensive loss	(2,889)	1,271
Other comprehensive income (loss), net of tax	(14,096)	6,596	60,235
Ending Balance	789,428	747,599	666,519
Cumulative Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(24,093)	(9,654)
Other comprehensive income (loss) before reclassifications	(5,296)	(14,439)
Amounts reclassified to (income) expense from accumulated other comprehensive loss	0	0
Other comprehensive income (loss), net of tax	(5,296)	(14,439)
Ending Balance	(29,389)	(24,093)	(9,654)
Cash Flow Hedges, Net of Tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	3,922	4,550
Other comprehensive income (loss) before reclassifications	(6,311)	1,368
Amounts reclassified to (income) expense from accumulated other comprehensive loss	0	(1,996)
Other comprehensive income (loss), net of tax	(6,311)	(628)
Ending Balance	(2,389)	3,922	4,550
Net Investment Hedges, Net of Tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	6,153	(1,926)
Other comprehensive income (loss) before reclassifications	7,471	8,079
Amounts reclassified to (income) expense from accumulated other comprehensive loss	0	0
Other comprehensive income (loss), net of tax	7,471	8,079
Ending Balance	13,624	6,153	(1,926)
Benefit Plans Liability, Net of Tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(77,681)	(91,265)
Other comprehensive income (loss) before reclassifications	(7,071)	10,317
Amounts reclassified to (income) expense from accumulated other comprehensive loss	(2,889)	3,267
Other comprehensive income (loss), net of tax	(9,960)	13,584
Ending Balance	(87,641)	(77,681)	(91,265)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(91,699)	(98,295)	(158,530)
Ending Balance	$ (105,795)	$ (91,699)	$ (98,295)

Earnings per Share ("EPS") - Na

Earnings per Share ("EPS") - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Feb. 28, 2019
Earnings Per Share Basic [Line Items]
Stock repurchase program, authorized amount				$ 50,000,000
Stock repurchased during period (in shares)	311,152
Average cost (in dollars per share)	$ 32.14
Stock repurchased during period	$ 10,000,000
Restricted stock awards
Earnings Per Share Basic [Line Items]
Shares paid for tax withholding for share based compensation (in shares)	82,721	140,064	68,815
Performance stock units
Earnings Per Share Basic [Line Items]
Anti-dilutive securities excluded from computation, have not met performance contingencies (in shares)	378,084	436,370	585,838
Stock Options
Earnings Per Share Basic [Line Items]
Anti-dilutive securities excluded from computation (in shares)	309,476	431,627	0

Earnings per Share ("EPS") - Ef

Earnings per Share ("EPS") - Effects of Share-Based Compensation Awards on Diluted Weighted-Average Number of Shares Outstanding used in Calculating Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	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
Basic:
Net income attributable to Kraton	$ (21,264)	$ 18,693	$ 41,208	$ 12,668	$ 17,524	$ 42,349	$ (14,930)	$ 22,072	$ 51,305	$ 67,015	$ 97,549
Amounts allocated to unvested restricted shares									399	972	1,832
Amounts available to common stockholders									$ 50,906	$ 66,043	$ 95,717
Weighted Average Shares Outstanding, Basic
As reported (in shares)									31,828	31,878	31,241
Amounts allocated to unvested restricted shares (in shares)									(247)	(462)	(587)
Amounts available to common stockholders (in shares)	31,516	31,486	31,692	31,633	31,520	31,459	31,441	31,241	31,581	31,416	30,654
Diluted:
Amounts allocated to unvested restricted shares									$ 399	$ 972	$ 1,832
Amounts reallocated to unvested restricted shares									(395)	(961)	(1,804)
Amounts available to stockholders and assumed conversions									$ 50,910	$ 66,054	$ 95,745
Weighted Average Shares Outstanding, Diluted
Amounts allocated to unvested restricted shares (in shares)									247	462	587
Non participating share units (in shares)									259	168	170
Stock options added under the treasury stock method (in shares)									41	205	316
Amounts reallocated to unvested restricted shares (in shares)									(247)	(462)	(587)
Amounts available to stockholders and assumed conversions (in shares)	31,516	31,823	32,017	31,901	31,714	31,834	31,441	31,851	31,881	31,789	31,140
Earnings Per Share, Basic (in dollars per share)	$ (0.67)	$ 0.59	$ 1.29	$ 0.40	$ 0.55	$ 1.33	$ (0.47)	$ 0.69	$ 1.61	$ 2.10	$ 3.12
Earnings Per Share, Diluted (in dollars per share)	$ (0.67)	$ 0.58	$ 1.28	$ 0.39	$ 0.55	$ 1.31	$ (0.47)	$ 0.68	$ 1.60	$ 2.08	$ 3.07

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Details) $ in Thousands, $ in Millions	Dec. 31, 2019USD ($)	Dec. 31, 2019TWD ($)	Dec. 31, 2018USD ($)	May 31, 2018	Aug. 31, 2017USD ($)	Mar. 31, 2017
Debt Instrument [Line Items]
Principal	$ 1,390,662
Principal	1,390,662		$ 1,567,115
Discount	(5,057)		(7,395)
Debt Issuance Costs	(20,980)		(27,101)
Total	1,364,625		1,532,619
Capital lease obligation	1,015
Capital lease obligation			1,184
Less current portion of total debt	53,139		45,321
Long-term debt	1,337,523		1,521,794
Total	1,311,486		1,487,298
KFPC Loan Agreement
Debt Instrument [Line Items]
Principal	82,375
Principal	82,400	$ 2,500	112,489
Discount	0		0
Debt Issuance Costs	(33)		(94)
Total	82,342		112,395
KFPC Revolving Credit Facilities
Debt Instrument [Line Items]
Principal	20,010
Principal	20,000	$ 600	13,012
Discount	0		0
Debt Issuance Costs	0		0
Total	20,010		13,012
ABL Facility
Debt Instrument [Line Items]
Principal	0
Principal			5,000
Discount	0		0
Debt Issuance Costs	0		0
Total	0		5,000
Medium-term Notes | USD Tranche
Debt Instrument [Line Items]
Principal	290,000
Principal			362,000
Discount	(5,057)		(7,395)
Debt Issuance Costs	(6,985)		(10,171)
Total	277,958		344,434
Medium-term Notes | Euro Tranche
Debt Instrument [Line Items]
Principal	277,134
Principal	277,100		342,900
Discount	0		0
Debt Issuance Costs	(3,237)		(4,711)		$ (3,900)
Total	273,897		338,189
Senior Notes | USD Tranche
Debt Instrument [Line Items]
Debt Issuance Costs					$ (1,300)
Senior Notes | 7.0% Senior Notes
Debt Instrument [Line Items]
Principal	394,750
Principal			399,060
Discount	0		0
Debt Issuance Costs	(5,846)		(6,622)
Total	$ 388,904		392,438
Debt instrument interest rate	7.00%	7.00%				7.00%
Senior Notes | 5.25% Senior Notes
Debt Instrument [Line Items]
Principal	$ 325,378
Principal			331,470
Discount	0		0
Debt Issuance Costs	(4,879)		(5,503)
Total	$ 320,499		$ 325,967
Debt instrument interest rate	5.25%	5.25%		5.25%

Long-Term Debt - Senior Secured

Long-Term Debt - Senior Secured Credit Facilities (Details) $ in Thousands, € in Millions	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2019EUR (€)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Outstanding borrowings	$ 1,390,662
Outstanding amount	1,390,662		$ 1,567,115
USD Tranche | Term Loan
Debt Instrument [Line Items]
Outstanding borrowings	$ 290,000
Outstanding amount			362,000
USD Tranche | Term Loan | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, fixed interest rate	4.30%	4.30%
USD Tranche | Term Loan | Secured Debt | Base Rate
Debt Instrument [Line Items]
Variable rate floor	1.50%
Debt instrument interest rate	2.50%	2.50%
Euro Tranche | Term Loan
Debt Instrument [Line Items]
Outstanding borrowings	$ 277,134
Outstanding amount	$ 277,100		$ 342,900
Euro Tranche | Term Loan | Secured Debt
Debt Instrument [Line Items]
Outstanding amount | €		€ 247
Debt instrument interest rate	2.00%	2.00%
Line of credit facility, fixed interest rate	2.80%	2.80%

Long-Term Debt - Senior Notes (

Long-Term Debt - Senior Notes (Details) - Senior Notes	Dec. 31, 2019USD ($)	Dec. 06, 2018USD ($)	May 31, 2018USD ($)	May 31, 2018EUR (€)	Mar. 31, 2017USD ($)
7.0% Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate	7.00%				7.00%
Senior note face amount					$ 400,000,000
Authorized amount to be repurchased		$ 20,000,000
Repurchase amount	$ 4,300,000
5.25% Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate	5.25%		5.25%	5.25%
Senior note face amount			$ 325,400,000	€ 290,000,000

Long-Term Debt - ABL Facility (

Long-Term Debt - ABL Facility (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Jan. 31, 2016
Debt Instrument [Line Items]
Outstanding amount	$ 1,390,662,000	$ 1,567,115,000
ABL Facility
Debt Instrument [Line Items]
Outstanding amount		$ 5,000,000
ABL Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, borrowing capacity			$ 250,000,000
Right of maximum additional commitments			$ 100,000,000
Outstanding amount	$ 0
Minimum percent required of federal outstanding commitments			60.00%

Long-Term Debt - KFPC (Details)

Long-Term Debt - KFPC (Details) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)facility	Dec. 31, 2019TWD ($)facility	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Outstanding amount | $	$ 1,390,662		$ 1,567,115
KFPC Loan Agreement
Debt Instrument [Line Items]
Outstanding amount	$ 82,400	$ 2,500	112,489
Interest rate during period	1.80%
Extension term	2 years
Revolving Credit Facility | Kraton Formosa Polymers Corporation, Expires September 29, 2018
Debt Instrument [Line Items]
Number of revolving credit facilities | facility	4	4
Credit facility, borrowing capacity	$ 71,800	$ 2,200
KFPC Short Term Facility
Debt Instrument [Line Items]
Outstanding amount	$ 20,000	$ 600	$ 13,012

Long-Term Debt - Debt Issuance

Long-Term Debt - Debt Issuance Cost (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Aug. 31, 2017	Mar. 31, 2017	Jan. 31, 2017	Jan. 06, 2016
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ (3,700)	$ (72,300)	$ (7,600)	$ (3,521)	$ (79,866)	$ (35,389)
Debt issuance cost charged to interest expense					18,700
Gain (loss) on repurchase of debt					(46,400)
Debt issuance costs	20,980			20,980	27,101
Debt issuance costs	22,200			22,200	29,400
Amortization of debt issuance costs				4,654	5,771	8,420
Long-term debt
Debt Instrument [Line Items]
Debt issuance costs	21,000			21,000
Arizona Chemical
Debt Instrument [Line Items]
Debt issuance costs								$ 7,800	$ 2,000
Interest Rate Swap
Debt Instrument [Line Items]
Loss on extinguishment of debt					2,600
Term Loan Facility and 7.0% Senior Notes
Debt Instrument [Line Items]
Debt issuance cost charged to interest expense				2,500
ABL Facility
Debt Instrument [Line Items]
Debt issuance costs	0			0	0
Debt issuance costs	$ 1,200			$ 1,200	2,300
ABL Facility | Long-term debt
Debt Instrument [Line Items]
Debt issuance costs					27,100
ABL Facility | Other current assets
Debt Instrument [Line Items]
Debt issuance costs					1,200
Senior Notes | 7.0% Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate	7.00%			7.00%				7.00%
Gain (loss) on repurchase of debt				$ 300
Debt issuance costs	$ 5,846			$ 5,846	6,622
Senior Notes | 10.5% Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate	10.50%			10.50%						10.50%
Senior Notes | USD Tranche
Debt Instrument [Line Items]
Debt issuance costs							$ 1,300
Senior Notes | Secured Debt | USD Tranche
Debt Instrument [Line Items]
Loss on extinguishment of debt						(33,700)
Extinguishment of debt, amount						$ 758,000
Term Loan | Euro Tranche
Debt Instrument [Line Items]
Debt issuance cost charged to interest expense				$ 1,300
Debt issuance costs	$ 3,237			3,237	4,711		$ 3,900
Term Loan | USD Tranche
Debt Instrument [Line Items]
Debt issuance costs	$ 6,985			$ 6,985	10,171
Term Loan | Secured Debt
Debt Instrument [Line Items]
Write-off of debt discounts					$ 17,400
Term Loan | Secured Debt | Euro Tranche
Debt Instrument [Line Items]
Debt instrument interest rate	2.00%			2.00%

Long-Term Debt - Remaining Prin

Long-Term Debt - Remaining Principal Payments on Outstanding Total Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Long-term Debt, Fiscal Year Maturity [Abstract]
2020	$ 53,139
2021	33,140
2022	16,677
2023	215
2024	229
Thereafter	1,287,262
Principal	$ 1,390,662	$ 1,567,115

Fair Value Measurements, Fina_3

Fair Value Measurements, Financial Instruments, and Credit Risk - Summary of Fair Value Measurements at Reporting Date (Details) - Recurring Basis - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivatives Fair Value [Line Items]
Total	$ 2,423	$ 7,665
Other current assets
Derivatives Fair Value [Line Items]
Derivative asset – current	14	1,558
Other long-term assets
Derivatives Fair Value [Line Items]
Derivative asset – noncurrent	32	3,635
Retirement plan asset—noncurrent	2,547	2,485
Other payables and accruals
Derivatives Fair Value [Line Items]
Derivative liability – current	(170)	(13)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Derivatives Fair Value [Line Items]
Total	2,547	2,485
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other current assets
Derivatives Fair Value [Line Items]
Derivative asset – current	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other long-term assets
Derivatives Fair Value [Line Items]
Derivative asset – noncurrent	0	0
Retirement plan asset—noncurrent	2,547	2,485
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other payables and accruals
Derivatives Fair Value [Line Items]
Derivative liability – current	0	0
Significant Other Observable Inputs (Level 2)
Derivatives Fair Value [Line Items]
Total	(124)	5,180
Significant Other Observable Inputs (Level 2) | Other current assets
Derivatives Fair Value [Line Items]
Derivative asset – current	14	1,558
Significant Other Observable Inputs (Level 2) | Other long-term assets
Derivatives Fair Value [Line Items]
Derivative asset – noncurrent	32	3,635
Retirement plan asset—noncurrent	0	0
Significant Other Observable Inputs (Level 2) | Other payables and accruals
Derivatives Fair Value [Line Items]
Derivative liability – current	$ (170)	$ (13)

Fair Value Measurements, Fina_4

Fair Value Measurements, Financial Instruments, and Credit Risk - Narrative (Details)	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	May 31, 2018USD ($)	May 31, 2018EUR (€)	Mar. 31, 2017USD ($)	Jan. 03, 2017USD ($)	Jan. 06, 2016
Derivative [Line Items]
Impairment of long-lived assets	$ 800,000	$ 2,200,000	$ 0
Notional amount							$ 925,400,000
Europe
Derivative [Line Items]
Impairment of long-lived assets	500,000
Gain (loss) on derivatives arising during period	6,100,000	10,500,000
Interest Rate Swap
Derivative [Line Items]
Notional amount	290,000,000
Unrealized gain on derivatives	$ (5,100,000)	2,300,000
Reclassification of (gain) loss on derivative		(2,600,000)
Interest Rate Swap | LIBOR Rate Plus
Derivative [Line Items]
Derivative, interest rate	1.608%
Foreign Currency Hedges
Derivative [Line Items]
Aggregate loss on settlement of hedges	$ 4,000,000	$ 1,100,000	$ 900,000
Senior Notes | 10.5% Senior Notes
Derivative [Line Items]
Debt instrument interest rate	10.50%							10.50%
Senior Notes | 7.0% Senior Notes
Derivative [Line Items]
Debt instrument interest rate	7.00%					7.00%
Principal						$ 400,000,000
Senior Notes | 5.25% Senior Notes
Derivative [Line Items]
Debt instrument interest rate	5.25%			5.25%	5.25%
Principal				$ 325,400,000	€ 290,000,000

Fair Value Measurements, Fina_5

Fair Value Measurements, Financial Instruments, and Credit Risk - Carrying Values and Approximate Fair Values of Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	May 31, 2018	Mar. 31, 2017
7.0% Senior Notes | Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instrument interest rate	7.00%			7.00%
5.25% Senior Notes | Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instrument interest rate	5.25%		5.25%
Carrying Value | KFPC Loan Agreement | Significant Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	$ 82,375	$ 112,489
Carrying Value | KFPC Revolving Credit Facilities | Significant Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	20,010	13,012
Carrying Value | Capital Lease Obligations | Significant Other Observable Inputs (Level 2)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	1,015	1,184
Carrying Value | USD Tranche | Medium-term Notes | Significant Other Observable Inputs (Level 2)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	290,000	362,000
Carrying Value | Euro Tranche | Medium-term Notes | Significant Other Observable Inputs (Level 2)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	277,134	342,900
Carrying Value | 7.0% Senior Notes | Senior Notes | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	394,750	399,060
Carrying Value | 5.25% Senior Notes | Senior Notes | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	325,378	0
Carrying Value | ABL Facility | Revolving Credit Facility | Significant Other Observable Inputs (Level 2)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	0	5,000
Fair Value | KFPC Loan Agreement | Significant Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	82,375	112,489
Fair Value | KFPC Revolving Credit Facilities | Significant Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	20,010	13,012
Fair Value | Capital Lease Obligations | Significant Other Observable Inputs (Level 2)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	1,015	1,184
Fair Value | USD Tranche | Medium-term Notes | Significant Other Observable Inputs (Level 2)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	290,183	352,498
Fair Value | Euro Tranche | Medium-term Notes | Significant Other Observable Inputs (Level 2)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	277,827	338,830
Fair Value | 7.0% Senior Notes | Senior Notes | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	406,214	369,561
Fair Value | 5.25% Senior Notes | Senior Notes | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	338,364	299,125
Fair Value | ABL Facility | Revolving Credit Facility | Significant Other Observable Inputs (Level 2)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	$ 0	$ 5,000

Restructuring Charges (Details)

Restructuring Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related expenses	$ 1.3	$ 3	$ 7.5
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related expenses	$ 0.5	$ 1.7

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Operating Loss Carryforwards [Line Items]
Valuation allowance for deferred tax assets	$ 38,440	$ 42,489
Change in valuation allowance	(4,000)	(8,800)
Tax Cuts and Jobs Act of 2017, transition tax, percent			0.155
Net operating loss carryforwards	198,200
Unrecognized tax benefits	11,294	29,603	$ 24,421
Unrecognized tax benefits, tax penalties and interest expense	(4,100)	1,500	$ 1,200
Unrecognized tax benefits, accrued income tax penalties and interest expense	2,100	6,300
Release of valuation allowance is reasonably possible	4,300
Transition tax on accumulated foreign earnings, remaining earnings, percent			8.00%
Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings, liability			$ 15,700
Tax Cuts and Jobs Act of 2017, change in tax rate, deferred tax			95,000
Other Comprehensive Income (Loss)
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	600	2,300
France And United Kingdom
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	(3,900)	(4,300)
United States
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	(700)	$ (2,200)
Federal Tax Administration (FTA)
Operating Loss Carryforwards [Line Items]
Tax Cuts and Jobs Act of 2017, change in tax rate, deferred tax			$ 68,900
Foreign
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	132,200
Domestic
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 66,000

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current tax benefit (expense):
U.S.	$ 13,968	$ (22,158)	$ (522)
Foreign	(2,314)	(7,903)	(7,598)
Current tax benefit (expense)	11,654	(30,061)	(8,120)
Deferred tax benefit (expense):
U.S.	(1,621)	18,868	57,248
Foreign	1,780	7,619	8,756
Deferred tax benefit (expense)	159	26,487	66,004
Income tax benefit (expense)	$ 11,813	$ (3,574)	$ 57,884

Income Taxes - Income (Loss) Be

Income Taxes - Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income (loss) before income taxes:
U.S.	$ 1,998	$ 10,605	$ (17,177)
Foreign	42,006	63,490	51,939
Income before income taxes	$ 44,004	$ 74,095	$ 34,762

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Statutory (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income taxes at the statutory rate	(21.00%)	(21.00%)	(35.00%)
Foreign tax rate differential	5.10%	15.30%	45.80%
State taxes, net of federal benefit	(0.10%)	(0.50%)	1.10%
Permanent differences	8.70%	10.90%	26.70%
Tax credits	3.60%	(0.10%)	7.60%
Alternative minimum tax	0.00%	0.00%	(7.60%)
Uncertain tax positions	40.30%	(8.30%)	1.80%
Valuation allowance	10.60%	8.80%	(4.80%)
Deferred tax rate change and transition tax	(7.70%)	14.40%	0.00%
U.S. minimum tax on foreign entities	(17.80%)	(16.20%)	140.10%
Other	5.10%	(8.00%)	(9.10%)
Effective tax rate	26.80%	(4.70%)	166.60%

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$ 49,634	$ 60,718
Interest carryforwards	30,429	26,615
Tax credit carryforwards	10,301	8,261
Inventory	8,100	6,760
Benefit plans accrual	25,219	26,027
Operating leases	17,543
Other accruals and reserves	4,782	4,739
Valuation allowance for deferred tax assets	(38,440)	(42,489)
Deferred tax assets	107,568	90,631
Deferred tax liabilities:
Property, plant, and equipment	112,454	105,097
Intangible assets	76,293	84,571
Operating leases	16,842
Investment in subsidiaries	18,356	18,356
Deferred tax liabilities	223,945	208,024
Net deferred tax liabilities	$ 116,377	$ 117,393

Income Taxes - Deferred Taxes C

Income Taxes - Deferred Taxes Classifications (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Non-current deferred tax assets	$ 8,863	$ 10,434
Non-current deferred tax liabilities	125,240	127,827
Net Deferred Tax Liabilities	$ 116,377	$ 117,393

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	$ 29,603	$ 24,421
Increase in current year tax positions	185	5,332
Increase in prior year tax positions	710	1,442
Decrease in prior year tax positions	(18,143)	(5)
Lapse of statute of limitations	(1,061)	(1,587)
Ending Balance	$ 11,294	$ 29,603

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) $ in Thousands, R$ in Millions	Dec. 31, 2019USD ($)	Dec. 31, 2019BRL (R$)	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Loss Contingencies [Line Items]
Discount rate, percent	3.125%	3.125%
Asset retirement obligation	$ 6,523		$ 800	$ 5,703	$ 5,712
Tax credits generated from purchase of certain goods	2,400	R$ 9.6
Shell Chemicals
Loss Contingencies [Line Items]
Receivables				200
Chemical
Loss Contingencies [Line Items]
Asset retirement obligation	$ 2,700			$ 2,900
Minimum
Loss Contingencies [Line Items]
Term of contract	1 year	1 year

Commitments and Contingencies_2

Commitments and Contingencies - Lease Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
Lease cost	$ 23,093
Variable lease cost	543
Operating lease expense	$ 23,636

Commitments and Contingencies_3

Commitments and Contingencies - Leased Assets Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease, liability		$ 70,900
Weighted Average in Months	64 months 9 days
Railcars
Lessee, Lease, Description [Line Items]
Average Months Remaining on the Lease	44 months
Weighted Average in Months	11 months 27 days
Buildings
Lessee, Lease, Description [Line Items]
Average Months Remaining on the Lease	36 months
Weighted Average in Months	15 months 12 days
Equipment
Lessee, Lease, Description [Line Items]
Average Months Remaining on the Lease	36 months
Weighted Average in Months	5 months 15 days
Land
Lessee, Lease, Description [Line Items]
Average Months Remaining on the Lease	380 months
Weighted Average in Months	30 months 6 days
Other
Lessee, Lease, Description [Line Items]
Average Months Remaining on the Lease	19 months
Weighted Average in Months	1 month 9 days
Operating Lease, Concentration Risk | Operating Lease Liability | Railcars
Lessee, Lease, Description [Line Items]
Percentage	27.00%
Operating Lease, Concentration Risk | Operating Lease Liability | Buildings
Lessee, Lease, Description [Line Items]
Percentage	42.90%
Operating Lease, Concentration Risk | Operating Lease Liability | Equipment
Lessee, Lease, Description [Line Items]
Percentage	15.10%
Operating Lease, Concentration Risk | Operating Lease Liability | Land
Lessee, Lease, Description [Line Items]
Percentage	7.90%
Operating Lease, Concentration Risk | Operating Lease Liability | Other
Lessee, Lease, Description [Line Items]
Percentage	7.10%
Polymer
Lessee, Lease, Description [Line Items]
Operating lease, liability	$ 41,823
Polymer | Railcars
Lessee, Lease, Description [Line Items]
Operating lease, liability	1,676
Polymer | Buildings
Lessee, Lease, Description [Line Items]
Operating lease, liability	29,181
Polymer | Equipment
Lessee, Lease, Description [Line Items]
Operating lease, liability	3,338
Polymer | Land
Lessee, Lease, Description [Line Items]
Operating lease, liability	6,916
Polymer | Other
Lessee, Lease, Description [Line Items]
Operating lease, liability	712
Chemical
Lessee, Lease, Description [Line Items]
Operating lease, liability	45,709
Chemical | Railcars
Lessee, Lease, Description [Line Items]
Operating lease, liability	21,946
Chemical | Buildings
Lessee, Lease, Description [Line Items]
Operating lease, liability	8,357
Chemical | Equipment
Lessee, Lease, Description [Line Items]
Operating lease, liability	9,864
Chemical | Land
Lessee, Lease, Description [Line Items]
Operating lease, liability	42
Chemical | Other
Lessee, Lease, Description [Line Items]
Operating lease, liability	$ 5,500

Commitments and Contingencies_4

Commitments and Contingencies - Operating Lease Liabilities (Details) $ in Thousands	Dec. 31, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
2020	$ 23,310
2021	17,629
2022	13,087
2023	9,665
2024	6,264
Thereafter	27,860
Total undiscounted operating lease liabilities	97,815
Present value discount	(10,400)
Foreign currency and other	117
Total discounted operating lease liabilities	$ 87,532

Commitments and Contingencies_5

Commitments and Contingencies - Undiscounted Operating Lease Liabilities (Details) $ in Thousands	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2019	$ 19,065
2020	16,891
2021	12,385
2022	8,284
2023	5,137
Thereafter	8,498
Total undiscounted operating lease liabilities	$ 70,260

Commitments and Contingencies_6

Commitments and Contingencies - Changes in Aggregate Carrying Amount of Asset Retirement Obligation Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligation
Beginning balance	$ 5,703	$ 5,712
Additional accruals	772	0
Accretion expense	343	330
Obligations settled	(206)	(91)
Foreign currency translation	89	248
Ending balance	$ 6,523	$ 5,703

Employee Benefits - Narrative (

Employee Benefits - Narrative (Detail)	3 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)typeplan	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Defined Benefit Plan Disclosure [Line Items]
Plan amendments		$ 0	$ 11,584,000
Number of defined benefit pension plans | plan		2
Number of types of employee contributions | type		2
Post-Retirement Benefits Other Than Pensions
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) in our accumulated other comprehensive income (loss)		$ 3,100,000	(12,800,000)
Retirement age of employees		65 years
Post-Retirement Benefits Other Than Pensions | Minimum
Defined Benefit Plan Disclosure [Line Items]
Contribution per employee		$ 7,000
Post-Retirement Benefits Other Than Pensions | Maximum
Defined Benefit Plan Disclosure [Line Items]
Contribution per employee		$ 10,000
Post-Retirement Benefits Other Than Pensions | Polymer Segment Savings Plan
Defined Benefit Plan Disclosure [Line Items]
Eligible earnings deferral, maximum		60.00%
Employee contribution expense		$ 9,700,000	9,200,000	$ 8,500,000
Post-Retirement Benefits Other Than Pensions | Polymer Segment Savings Plan | One Year Service
Defined Benefit Plan Disclosure [Line Items]
Employer standard contribution, rate		50.00%
Employee matching contribution, rate		6.00%
Post-Retirement Benefits Other Than Pensions | Polymer Segment Savings Plan | Five Year Service
Defined Benefit Plan Disclosure [Line Items]
Employer standard contribution, rate		100.00%
Employee matching contribution, rate		6.00%
Number of years of service		5 years
Post-Retirement Benefits Other Than Pensions | Polymer Segment Savings Plan | Less Than Five Years Of Service
Defined Benefit Plan Disclosure [Line Items]
Employee enhanced contribution, rate		4.00%
U.S. Plans | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Plan amendments		$ 12,507,000	0
Increase (decrease) in our accumulated other comprehensive income (loss)		$ (100,000)	$ (1,600,000)
Expected long-term return on assets under pension plan		8.00%	8.00%
Expected long-term rate of return on plan assets before non-interest expense		8.50%
Expected long-term rate of return on plan assets		7.00%	8.00%
Expected long-term rate of return on plan assets, non-investment expense		0.50%
Non-U.S. Plans | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Plan amendments	$ 300,000	$ 321,000	$ (625,000)
Increase (decrease) in our accumulated other comprehensive income (loss)		$ 9,100,000	$ (5,600,000)
Expected long-term return on assets under pension plan		5.49%	5.49%
Expected long-term rate of return on plan assets		5.24%	5.49%

Employee Benefits - Pension Obl

Employee Benefits - Pension Obligation, Plan Assets, Amounts Recognized in Financial Statements and Underlying Actuarial Assumptions 123 (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in benefit obligation:
Plan amendments		$ 0	$ (11,584)
Change in plan assets:
Fair value at beginning of period		155,923
Fair value at end of period		184,660	155,923
Pension Plan | U.S. Plans
Change in benefit obligation:
Benefit obligation at beginning of period		177,589	189,151
Service cost		2,671	3,221	$ 3,191
Interest cost		7,781	7,200	7,330
Participant contributions		0	0
Benefits paid		(7,354)	(6,588)
Expenses and taxes		0	0
Plan amendments		(12,507)	0
Settlements		0	0
Actuarial (gain) loss		26,717	(15,395)
Exchange rate (gain) loss		0	0
Benefit obligation at end of period		194,897	177,589	189,151
Change in plan assets:
Fair value at beginning of period		110,899	121,831
Return on plan assets		20,849	(11,801)
Employer contributions		7,586	7,457
Participant contributions		0	0
Benefits paid		(7,354)	(6,588)
Expenses and taxes		0	0
Settlements		0	0
Exchange rate (gain) loss		0	0
Fair value at end of period		131,980	110,899	121,831
Funded status at end of period		(62,917)	(66,690)
Amounts recognized on balance sheet:
Current liabilities		0	0
Noncurrent liabilities		(62,917)	(66,690)
Defined benefit pension plan liabilities		(62,917)	(66,690)
Amounts recognized in accumulated other comprehensive loss:
Prior service costs		0	0
Net actuarial loss		58,505	58,567
Amounts recognized in accumulated other comprehensive loss		58,505	58,567
Accumulated benefit obligation		194,887	167,678
Pension Plan | Non-U.S. Plans
Change in benefit obligation:
Benefit obligation at beginning of period		81,108	94,205
Service cost		1,491	2,504	2,749
Interest cost		2,112	2,073	2,195
Participant contributions		215	180
Benefits paid		(3,577)	(4,248)
Expenses and taxes		0	0
Plan amendments	$ (300)	(321)	625
Settlements		(400)	0
Actuarial (gain) loss		13,070	(9,641)
Exchange rate (gain) loss		1,567	(4,590)
Benefit obligation at end of period		95,265	81,108	94,205
Change in plan assets:
Fair value at beginning of period		45,024	48,401
Return on plan assets		5,926	(2,150)
Employer contributions		4,067	5,385
Participant contributions		215	180
Benefits paid		(3,577)	(4,248)
Expenses and taxes		0	0
Settlements		(400)	0
Exchange rate (gain) loss		1,425	(2,544)
Fair value at end of period		52,680	45,024	$ 48,401
Funded status at end of period		(42,585)	(36,084)
Amounts recognized on balance sheet:
Current liabilities		(2,323)	(2,123)
Noncurrent liabilities		(40,262)	(33,961)
Defined benefit pension plan liabilities		(42,585)	(36,084)
Amounts recognized in accumulated other comprehensive loss:
Prior service costs		573	919
Net actuarial loss		20,495	11,014
Amounts recognized in accumulated other comprehensive loss		21,068	11,933
Accumulated benefit obligation		$ 91,152	$ 77,638

Employee Benefits - Estimated F

Employee Benefits - Estimated Future Benefit Payments (Detail) $ in Thousands	Dec. 31, 2019USD ($)
Pension Plan | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
2020 Employer contribution	$ 9,625
Benefit Payments
2020	7,751
2021	8,040
2022	8,409
2023	8,752
2024	9,062
Years 2024-2028	50,212
Estimated future benefit payments, total	92,226
Pension Plan | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
2020 Employer contribution	3,802
Benefit Payments
2020	3,819
2021	3,516
2022	3,654
2023	3,924
2024	3,865
Years 2024-2028	21,123
Estimated future benefit payments, total	39,901
Post-Retirement Benefits Other Than Pensions
Defined Benefit Plan Disclosure [Line Items]
2020 Employer contribution	1,470
Benefit Payments
2020	1,470
2021	1,450
2022	1,430
2023	1,430
2024	1,430
Years 2024-2028	7,130
Estimated future benefit payments, total	$ 14,340

Employee Benefits - Components

Employee Benefits - Components of Net Periodic Pension Costs - United States Retirement Benefit Plan (Detail) - Pension Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period	$ 2,671	$ 3,221	$ 3,191
Interest on prior year’s projected benefit obligation	7,781	7,200	7,330
Expected return on plan assets	(10,065)	(9,808)	(9,401)
One-time settlement costs	0	0	0
Amortization of prior service costs	0	0	0
Amortization of net actuarial loss	3,487	4,650	3,622
Net periodic pension costs	3,874	5,263	4,742
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period	1,491	2,504	2,749
Interest on prior year’s projected benefit obligation	2,112	2,073	2,195
Expected return on plan assets	(2,520)	(2,685)	(2,575)
One-time settlement costs	56	0	45
Amortization of prior service costs	34	13	11
Amortization of net actuarial loss	419	645	165
Net periodic pension costs	$ 1,592	$ 2,550	$ 2,590

Employee Benefits - Future Amor

Employee Benefits - Future Amortization (Details) - Pension Plan $ in Thousands	Dec. 31, 2019USD ($)
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service costs	$ 0
Amortization of net actuarial loss	1,600
Total	1,600
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service costs	17
Amortization of net actuarial loss	1,011
Total	$ 1,028

Employee Benefits - Weighted Av

Employee Benefits - Weighted Average Assumptions used to Determine Benefit Obligations and Net Periodic Benefit Cost - United States Retirement Benefit Plan (Detail) - Pension Plan	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
U.S. Plans
Weighted average assumptions used to determine benefit obligations:
Discount rate	3.45%	4.45%
Rates of increase in salary compensation level	3.00%	3.00%
Expected long-term rate of return on plan assets	7.00%	8.00%
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate	4.45%	3.86%
Rates of increase in salary compensation level	3.00%	3.00%
Expected long-term rate of return on plan assets	8.00%	8.00%
Non-U.S. Plans
Weighted average assumptions used to determine benefit obligations:
Discount rate	1.79%	2.63%
Rates of increase in salary compensation level	2.96%	2.98%
Expected long-term rate of return on plan assets	5.24%	5.49%
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate	2.63%	2.29%
Rates of increase in salary compensation level	2.98%	3.15%
Expected long-term rate of return on plan assets	5.49%	5.49%

Employee Benefits - Pension Pla

Employee Benefits - Pension Plan Asset Allocations by Asset Category (Detail)	Dec. 31, 2019	Dec. 31, 2018
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%
Percentage of Plan Assets	100.00%	100.00%
U.S. Plans | Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	50.00%
Percentage of Plan Assets	68.10%	59.50%
U.S. Plans | Debt
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	30.00%
Percentage of Plan Assets	31.90%	40.00%
U.S. Plans | Other
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	20.00%
Percentage of Plan Assets	0.00%	0.50%
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%
Percentage of Plan Assets	100.00%	100.00%
Non-U.S. Plans | Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	50.00%
Percentage of Plan Assets	42.10%	46.90%
Non-U.S. Plans | Debt
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	50.00%
Percentage of Plan Assets	53.70%	48.40%
Non-U.S. Plans | Other
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	0.00%
Percentage of Plan Assets	4.20%	4.70%

Employee Benefits - Fair Value

Employee Benefits - Fair Value of Pension Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 184,660	$ 155,923
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	69,928	65,623
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	114,431	90,046
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	301	254
Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	63,000	47,100
Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	112,094	87,159
Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	56,220	43,867
Equity | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55,874	43,292
Equity | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Debt
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	70,358	66,098
Debt | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12,745	19,344
Debt | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	57,613	46,754
Debt | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,208	2,666
Other | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	963	2,412
Other | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	944	0
Other | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 301	$ 254

Employee Benefits - Plan Obliga

Employee Benefits - Plan Obligation, Funded Status and Amounts Recognized in Financial Statements and Underlying Actuarial and Other Assumptions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in benefit obligation:
Plan amendments	$ 0	$ (11,584)
Change in plan assets:
Fair value at beginning of period	155,923
Fair value at end of period	184,660	155,923
Amounts recognized in accumulated other comprehensive loss:
Reduction in pension and other post-retirement liabilities		(13,100)
Post-Retirement Benefits Other Than Pensions
Change in benefit obligation:
Benefit obligation at beginning of period	22,824	35,851
Service cost	290	490	$ 557
Interest cost	941	1,224	1,370
Benefits and expenses paid (premiums)	(2,055)	(2,081)
Actuarial (gain) loss	1,979	(1,076)
Benefit obligation at end of period	23,979	22,824	35,851
Change in plan assets:
Fair value at beginning of period	0	0
Employer contributions	2,055	2,081
Benefits paid	(2,055)	(2,081)
Fair value at end of period	0	0	$ 0
Funded status at end of year	(23,979)	(22,824)
Amounts recognized in the balance sheet:
Current liabilities	(1,446)	(1,478)
Noncurrent liabilities	(22,533)	(21,346)
Defined benefit pension plan liabilities	(23,979)	(22,824)
Amounts recognized in accumulated other comprehensive loss:
Prior service costs	(9,254)	(11,002)
Net actuarial loss	9,833	8,476
Amounts recognized in accumulated other comprehensive loss	579	(2,526)
Ripplewood Transaction Shell Chemicals | Post-Retirement Benefits Other Than Pensions
Amounts recognized in accumulated other comprehensive loss:
Retirement plan asset—noncurrent	$ 5,700	$ 6,800

Employee Benefits - Component_2

Employee Benefits - Components of Net Periodic Pension Costs - Postretirement Benefits Other Than Pensions (Detail) - Post-Retirement Benefits Other Than Pensions - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 290	$ 490	$ 557
Interest cost	941	1,224	1,370
Amortization of prior service costs	(1,747)	(582)	0
Amortization of net actuarial loss	621	742	598
Net periodic pension costs	$ 105	$ 1,874	$ 2,525

Employee Benefits - Weighted _2

Employee Benefits - Weighted Average Assumptions used to Determine Benefit Obligations and Net Periodic Benefit Cost - Postretirement Benefits Other Than Pensions (Detail) - Post-Retirement Benefits Other Than Pensions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Weighted average assumptions used to determine benefit obligations:
Discount rate	3.34%	4.36%
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate	4.36%	3.94%

Employee Benefits - Assumed Hea

Employee Benefits - Assumed Health Care Cost Trend Rates (Detail) - Post-Retirement Benefits Other Than Pensions - Pre-65 health care cost trend	Dec. 31, 2019	Dec. 31, 2018
Assumed Pre-65 health care cost trend rates:
Health care cost trend rate assumed for next year	7.50%	8.00%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.50%	4.50%

Employee Benefits - Effect of O

Employee Benefits - Effect of One Percentage Point Change in Assumed Health Care Cost Trend Rates (Detail) - Post-Retirement Benefits Other Than Pensions $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract]
Effect on total of service and interest cost components, 1% Increase	$ 1
Effect on postretirement benefit obligation, 1% Increase	36
Effect on total of service and interest cost components, 1% Decrease	(3)
Effect on postretirement benefit obligation, 1% Decrease	$ (48)

Industry Segment and Foreign _3

Industry Segment and Foreign Operations - Additional Information (Details) $ in Thousands	3 Months Ended				12 Months Ended
	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2019USD ($)segment	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment					2
Segment Reporting Information [Line Items]
Capital expenditure					$ 103,688	$ 100,122	$ 99,223
Gain on insurance proceeds	$ 14,300	$ 7,500	$ 11,100	$ 8,900	32,850	8,900	$ 0
Hurricane
Segment Reporting Information [Line Items]
Gain on insurance proceeds					32,900	1,100
Proceeds from insurance settlement					41,800
Polymer
Segment Reporting Information [Line Items]
Capital expenditure					58,700	51,800
Gain on insurance proceeds					0	0
Chemical
Segment Reporting Information [Line Items]
Capital expenditure					45,000	$ 48,400
Gain on insurance proceeds				$ 8,900	$ 32,850

Industry Segment and Foreign _4

Industry Segment and Foreign Operations - Sales Revenue by Product Groups (Details) - USD ($) $ in Thousands	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
Segment Reporting Information [Line Items]
Revenue	$ 408,524	$ 444,221	$ 495,280	$ 456,411	$ 447,783	$ 523,105	$ 538,395	$ 502,392	$ 1,804,436	$ 2,011,675	$ 1,960,362
Cost of goods sold									1,390,007	1,431,069	1,415,659
Gross profit	76,946	101,279	129,202	107,002	108,558	154,261	170,709	147,078	414,429	580,606	544,703
Operating expenses
Research and development									41,073	41,296	40,283
Selling, general, and administrative									149,800	153,897	161,260
Depreciation and amortization									136,171	141,410	137,162
Gain on insurance proceeds		(14,300)	(7,500)	(11,100)	(8,900)				(32,850)	(8,900)	0
Loss on disposal of fixed assets									773	2,169	514
Operating income	(9,944)	$ 38,103	$ 56,168	$ 35,135	33,398	$ 72,394	82,787	62,155	119,462	250,734	205,484
Other income (expense)									3,339	(3,472)	(3,360)
Loss on extinguishment of debt	$ (3,700)						$ (72,300)	$ (7,600)	(3,521)	(79,866)	(35,389)
Earnings of unconsolidated joint venture									506	471	486
Interest expense, net									(75,782)	(93,772)	(132,459)
Income before income taxes									44,004	74,095	34,762
Polymer
Segment Reporting Information [Line Items]
Revenue									1,052,968	1,221,586	1,199,676
Cost of goods sold									820,410	872,506	887,096
Gross profit									232,558	349,080	312,580
Operating expenses
Research and development									29,392	28,957	28,387
Selling, general, and administrative									86,025	89,753	94,592
Depreciation and amortization									59,151	71,006	67,998
Gain on insurance proceeds									0	0
Loss on disposal of fixed assets									647	202	(514)
Operating income									57,343	159,162	121,089
Chemical
Segment Reporting Information [Line Items]
Revenue									751,468	790,089	760,686
Cost of goods sold									569,597	558,563	528,563
Gross profit									181,871	231,526	232,123
Operating expenses
Research and development									11,681	12,339	11,896
Selling, general, and administrative									63,775	64,144	66,668
Depreciation and amortization									77,020	70,404	69,164
Gain on insurance proceeds					$ (8,900)				(32,850)
Loss on disposal of fixed assets									126	1,967	0
Operating income									$ 62,119	$ 91,572	$ 84,395

Industry Segment and Foreign _5

Industry Segment and Foreign Operations - Long-lived Assets Including Goodwill and Total Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Property, plant, and equipment	$ 925,940	$ 941,476
Investment in unconsolidated joint venture	11,971	12,070
Goodwill	772,418	772,886
Total assets	2,832,385	2,894,704
Polymer
Segment Reporting Information [Line Items]
Property, plant, and equipment	526,692	543,086
Investment in unconsolidated joint venture	11,971	12,070
Goodwill	0	0
Total assets	1,097,691	1,160,029
Chemical
Segment Reporting Information [Line Items]
Property, plant, and equipment	399,248	398,390
Investment in unconsolidated joint venture	0	0
Goodwill	772,418	772,886
Total assets	$ 1,734,694	$ 1,734,675

Industry Segment and Foreign _6

Industry Segment and Foreign Operations - Revenue by Geographic Region (Details) - USD ($) $ in Thousands	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
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 408,524	$ 444,221	$ 495,280	$ 456,411	$ 447,783	$ 523,105	$ 538,395	$ 502,392	$ 1,804,436	$ 2,011,675	$ 1,960,362
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									670,082	737,501	690,247
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									159,259	195,359	199,076
All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									975,095	1,078,815	1,071,039
Polymer
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,052,968	1,221,586	1,199,676
Polymer | United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									352,735	412,308	373,103
Polymer | Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									107,661	141,451	139,256
Polymer | All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									592,572	667,827	687,317
Chemical
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									751,468	790,089	760,686
Chemical | United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									317,347	325,193	317,144
Chemical | Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									51,598	53,908	59,820
Chemical | All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									$ 382,523	$ 410,988	$ 383,722

Industry Segment and Foreign _7

Industry Segment and Foreign Operations - Long-Lived Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	$ 1,565,137	$ 1,539,261
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	953,945	898,143
Taiwan
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	183,963	178,363
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	157,938	150,410
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	24,351	76,454
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	75,787	73,142
All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	169,153	162,749
Polymer
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	1,037,395	1,048,395
Polymer | Reportable Geographical Components | United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	568,710	541,017
Polymer | Reportable Geographical Components | Taiwan
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	183,963	178,363
Polymer | Reportable Geographical Components | France
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	144,785	138,659
Polymer | Reportable Geographical Components | Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	24,351	76,454
Polymer | Reportable Geographical Components | Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	70,617	68,231
Polymer | Reportable Geographical Components | All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	44,969	45,671
Chemical
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	527,742	490,866
Chemical | Reportable Geographical Components | United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	385,235	357,126
Chemical | Reportable Geographical Components | Taiwan
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	0	0
Chemical | Reportable Geographical Components | France
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	13,153	11,751
Chemical | Reportable Geographical Components | Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	0	0
Chemical | Reportable Geographical Components | Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	5,170	4,911
Chemical | Reportable Geographical Components | All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets, at cost	$ 124,184	$ 117,078

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
KFPC | Variable Interest Entity, Primary Beneficiary
Related Party Transaction [Line Items]
Due to related parties	$ 1.1	$ 0.8
Ownership percentage	50.00%
Purchases from related party	$ 48.5	47.2	$ 14.4
Styrenic Block Copolymer Joint Venture
Related Party Transaction [Line Items]
Percentage of equity investment	50.00%
Due to related parties	$ 16.4	20.1
Amounts of transaction	$ 33	$ 35.4	$ 39.6

Variable Interest Entity - Addi

Variable Interest Entity - Additional Information (Details) - Variable Interest Entity, Primary Beneficiary - KFPC	12 Months Ended
	Dec. 31, 2019
Variable Interest Entity [Line Items]
Ownership percentage	50.00%
Minimum percent to be purchased from plant production	80.00%

Variable Interest Entity - Summ

Variable Interest Entity - Summary of Assets and Liabilites at Carrying Value (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 35,033		$ 85,891
Other current assets	22,385		29,980
Property, plant, and equipment	925,940		941,476
Intangible assets	325,877		362,038
Long-term operating lease assets, net	85,003	$ 70,900
Other long-term assets	25,219		29,074
Total assets	2,832,385		2,894,704
Current portion of long-term debt	53,139		45,321
Current liabilities	366,644		349,087
Long-term debt	1,364,625		1,532,619
Long-term operating lease liabilities	66,624
Total liabilities	2,042,957		2,147,105
KFPC
Variable Interest Entity [Line Items]
Cash and cash equivalents	10,402		6,640
Other current assets	14,847		18,363
Property, plant, and equipment	155,153		159,893
Intangible assets	8,133		8,590
Long-term operating lease assets, net	7,044
Other long-term assets	2,147		11,838
Total assets	197,726		205,324
Current portion of long-term debt	52,961		45,152
Current liabilities	12,801		14,996
Long-term debt	49,391		80,255
Long-term operating lease liabilities	6,603
Total liabilities	$ 121,756		$ 140,403

Selected Quarterly Financial _3

Selected Quarterly Financial Data (Unaudited) - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	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
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 408,524	$ 444,221	$ 495,280	$ 456,411	$ 447,783	$ 523,105	$ 538,395	$ 502,392	$ 1,804,436	$ 2,011,675	$ 1,960,362
Gross profit	76,946	101,279	129,202	107,002	108,558	154,261	170,709	147,078	414,429	580,606	544,703
Operating income (loss)	(9,944)	38,103	56,168	35,135	33,398	72,394	82,787	62,155	119,462	250,734	205,484
Net income (loss) attributable to Kraton	$ (21,264)	$ 18,693	$ 41,208	$ 12,668	$ 17,524	$ 42,349	$ (14,930)	$ 22,072	$ 51,305	$ 67,015	$ 97,549
Earnings (loss) per common share
Basic (in dollars per share)	$ (0.67)	$ 0.59	$ 1.29	$ 0.40	$ 0.55	$ 1.33	$ (0.47)	$ 0.69	$ 1.61	$ 2.10	$ 3.12
Diluted (in dollars per share)	$ (0.67)	$ 0.58	$ 1.28	$ 0.39	$ 0.55	$ 1.31	$ (0.47)	$ 0.68	$ 1.60	$ 2.08	$ 3.07
Weighted average common shares outstanding
Basic (in shares)	31,516	31,486	31,692	31,633	31,520	31,459	31,441	31,241	31,581	31,416	30,654
Diluted (in shares)	31,516	31,823	32,017	31,901	31,714	31,834	31,441	31,851	31,881	31,789	31,140

Selected Quarterly Financial _4

Selected Quarterly Financial Data (Unaudited) - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Gain on insurance proceeds		$ 14,300	$ 7,500	$ 11,100	$ 8,900			$ 32,850	$ 8,900	$ 0
Loss on extinguishment of debt	$ 3,700					$ 72,300	$ 7,600	$ 3,521	$ 79,866	$ 35,389
Weather related costs					$ 13,700
Cariflex | Disposal Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Professional fees	$ 5,000

SCHEDULE II_VALUATION AND QUA_2

SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 784	$ 824	$ 814
Net Expenses	(117)	(40)	590
Write-offs	(233)	0	(580)
Balance at End of Period	434	784	824
Inventory reserves
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	8,951	11,452	13,580
Net Expenses	6	(2,274)	(2,410)
Foreign Currency	(34)	(227)	282
Balance at End of Period	$ 8,923	$ 8,951	$ 11,452