10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)                                                                                                                                                                                         

☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2017

or

◻TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number: 001-36473

Trinseo S.A.

(Exact name of registrant as specified in its charter)

Luxembourg	N/A
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

1000 Chesterbrook Boulevard

Suite 300

Berwyn, PA 19312

(Address of Principal Executive Offices)

(610) 240-3200

(Registrant’s telephone number)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ◻ 

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ☒    No   ◻ 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	◻	
Non-accelerated filer	◻  (Do not check if a smaller reporting company)	Smaller reporting company	◻	Emerging growth company	◻

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ◻

Indicate by a check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ◻    No  ☒ 

As of November 1, 2017, there were 43,704,689 of the registrant’s ordinary shares outstanding.

TABLE OF CONTENTS

		Page
Part I	Financial Information
Item 1.	Financial Statements	4
	Condensed Consolidated Balance Sheets as of September 30, 2017 and December 31, 2016 (Unaudited)	4
	Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2017 and 2016 (Unaudited)	5
	Condensed Consolidated Statements of Comprehensive Income (Loss) for the three and nine months ended September 30, 2017 and 2016 (Unaudited)	6
	Condensed Consolidated Statements of Shareholders’ Equity for the nine months ended September 30, 2017 and 2016 (Unaudited)	7
	Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2017 and 2016 (Unaudited)	8
	Notes to Condensed Consolidated Financial Statements (Unaudited)	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	32
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	49
Item 4.	Controls and Procedures	49
Part II	Other Information
Item 1.	Legal Proceedings	49
Item 1A.	Risk Factors	50
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	50
Item 3.	Defaults Upon Senior Securities	50
Item 4.	Mine Safety Disclosures	50
Item 5.	Other Information	50
Item 6.	Exhibits	50
Exhibit Index
Signatures

2

Trinseo S.A.

Quarterly Report on Form 10-Q

For the quarterly period ended September 30, 2017

Unless otherwise indicated or required by context, as used in this Quarterly Report on Form 10-Q (“Quarterly Report”), the term “Trinseo” refers to Trinseo S.A. (NYSE: TSE), a public limited liability company (société anonyme) existing under the laws of Luxembourg, and not its subsidiaries. The terms “Company,” “we,” “us” and “our” refer to Trinseo and its consolidated subsidiaries, taken as a consolidated entity. All financial data provided in this Quarterly Report is the financial data of the Company, unless otherwise indicated.

Prior to the formation of the Company, our business was wholly owned by The Dow Chemical Company (together with other affiliates, “Dow”). In June 2010, investment funds advised or managed by affiliates of Bain Capital Partners, LLC (“Bain Capital”) acquired an ownership interest in our business through an indirect ownership interest in us. During 2016, Bain Capital Everest Manager Holding SCA (“the former Parent”), an affiliate of Bain Capital, sold its entire ownership interest in the Company pursuant to the Company’s shelf registration statement filed with the Securities and Exchange Commission (“SEC”).

Definitions of capitalized terms not defined herein appear in the notes to our condensed consolidated financial statements.The Company may distribute cash to shareholders under Luxembourg law via repayments of equity or an allocation of statutory profits. Since the Company began paying dividends, all distributions have been considered repayments of equity under Luxembourg law.    

Cautionary Note on Forward-Looking Statements

This Quarterly Report contains forward-looking statements including, without limitation, statements concerning plans, objectives, goals, projections, strategies, future events or performance, and underlying assumptions and other statements, which are not statements of historical facts. Forward-looking statements may be identified by the use of words like “expect,” “anticipate,” “intend,” “forecast,” “outlook,” “will,” “may,” “might,” “potential,” “likely,” “target,” “plan,” “contemplate,” “seek,” “attempt,” “should,” “could,” “would” or expressions of similar meaning. Forward-looking statements reflect management’s evaluation of information currently available and are based on our current expectations and assumptions regarding our business, the economy and other future conditions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict. Specific factors that may impact performance or other predictions of future actions have, in many but not all cases, been identified in connection with specific forward-looking statements. Factors that might cause such a difference include, but are not limited to, those discussed in our Annual Report on Form 10-K for the year ended December 31, 2016 (“Annual Report”) filed with the SEC on March 1, 2017 under Part I, Item IA— “Risk Factors”, and elsewhere within this Quarterly Report.

As a result of these or other factors, our actual results may differ materially from those contemplated by the forward-looking statements. They are neither statements of historical fact nor guarantees or assurances of future performance. Therefore, we caution you against relying on these forward-looking statements. The forward-looking statements included in this Quarterly Report are made only as of the date hereof. We undertake no obligation to publicly update or revise any forward-looking statement as a result of new information, future events or otherwise, except as otherwise required by law.

Available Information

Our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, are available free of charge through the Investor Relations section of our website, www.trinseo.com, as soon as reasonably practicable after the reports are electronically filed or furnished with the U.S. Securities and Exchange Commission. We provide this website and information contained in or connected to it for informational purposes only. That information is not a part of this Quarterly Report.

3

PART I —FINANCIAL INFORMATION

Item 1. Financial Statements 

TRINSEO S.A.

Condensed Consolidated Balance Sheets  

(In thousands, except per share data)

(Unaudited)

		September 30,	December 31,
		2017	2016
Assets
Current assets
Cash and cash equivalents	$	318,703	$	465,114
Accounts receivable, net of allowance for doubtful accounts (September 30, 2017: $6,045; December 31, 2016: $3,138)		719,094		564,428
Inventories		483,158		385,345
Other current assets		24,591		17,999
Total current assets		1,545,546		1,432,886
Investments in unconsolidated affiliates		161,883		191,418
Property, plant and equipment, net of accumulated depreciation (September 30, 2017: $505,100; December 31, 2016: $420,343)		600,067		513,757
Other assets
Goodwill		62,774		29,485
Other intangible assets, net		207,819		177,345
Deferred income tax assets—noncurrent		46,942		40,187
Deferred charges and other assets		31,521		24,412
Total other assets		349,056		271,429
Total assets	$	2,656,552	$	2,409,490
Liabilities and shareholders’ equity
Current liabilities
Short-term borrowings and current portion of long-term debt	$	7,000	$	5,000
Accounts payable		415,709		378,029
Income taxes payable		32,006		23,784
Accrued expenses and other current liabilities		140,988		135,357
Total current liabilities		595,703		542,170
Noncurrent liabilities
Long-term debt, net of unamortized deferred financing fees		1,165,924		1,160,369
Deferred income tax liabilities—noncurrent		40,332		24,844
Other noncurrent obligations		284,551		237,054
Total noncurrent liabilities		1,490,807		1,422,267
Commitments and contingencies (Note 10)
Shareholders’ equity
Ordinary shares, $0.01 nominal value, 50,000,000 shares authorized (September 30, 2017: 48,778 shares issued and 43,703 shares outstanding; December 31, 2016: 48,778 shares issued and 44,301 shares outstanding)		488		488
Additional paid-in-capital		576,790		573,662
Treasury shares, at cost (September 30, 2017: 5,075 shares; December 31, 2016: 4,477 shares)		(263,673)		(217,483)
Retained earnings		423,456		258,540
Accumulated other comprehensive loss		(167,019)		(170,154)
Total shareholders’ equity		570,042		445,053
Total liabilities and shareholders’ equity	$	2,656,552	$	2,409,490

The accompanying notes are an integral part of these condensed consolidated financial statements.

4

TRINSEO S.A.

Condensed Consolidated Statements of Operations  

(In thousands, except per share data)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Net sales	$	1,096,582	$	935,410	$	3,346,271	$	2,799,188
Cost of sales		949,457		795,026		2,876,137		2,349,392
Gross profit		147,125		140,384		470,134		449,796
Selling, general and administrative expenses		65,732		73,900		181,552		180,635
Equity in earnings of unconsolidated affiliates		43,807		36,686		93,029		110,314
Operating income		125,200		103,170		381,611		379,475
Interest expense, net		18,436		18,832		55,355		56,542
Loss on extinguishment of long-term debt		65,260		—		65,260		—
Other expense (income), net		(11)		1,084		(6,072)		16,628
Income before income taxes		41,515		83,254		267,068		306,305
Provision for income taxes		8,300		16,000		56,400		66,500
Net income	$	33,215	$	67,254	$	210,668	$	239,805
Weighted average shares- basic		43,745		45,865		43,900		47,152
Net income per share- basic	$	0.76	$	1.47	$	4.80	$	5.09
Weighted average shares- diluted		44,782		46,961		45,046		48,041
Net income per share- diluted	$	0.74	$	1.43	$	4.68	$	4.99
Dividends per share	$	0.36	$	0.30	$	1.02	$	0.60

The accompanying notes are an integral part of these condensed consolidated financial statements.

5

TRINSEO S.A.

Condensed Consolidated Statements of Comprehensive Income (Loss)  

(In thousands, unless otherwise stated)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Net income	$	33,215	$	67,254	$	210,668	$	239,805
Other comprehensive income (loss), net of tax (tax amounts shown in millions below for the three and nine months ended September 30, 2017 and 2016, respectively):
Cumulative translation adjustments		(1,561)		1,488		21,614		3,906
Net loss on cash flow hedges		(3,715)		(2,280)		(21,491)		(3,676)
Pension and other postretirement benefit plans:
Net loss arising during period (net of tax of: 2017—$0 and $0; 2016—$0 and ($0.5))		—		—		—		(800)
Amounts reclassified from accumulated other comprehensive income (loss)		840		533		3,012		1,612
Total other comprehensive income (loss), net of tax		(4,436)		(259)		3,135		1,042
Comprehensive income	$	28,779	$	66,995	$	213,803	$	240,847

The accompanying notes are an integral part of these condensed consolidated financial statements.

6

TRINSEO S.A.

Condensed Consolidated Statements of Shareholders’ Equity  

(In thousands, except per share data)

(Unaudited)

	Shares		Shareholders' Equity
	Ordinary Shares Outstanding	Treasury Shares	Ordinary Shares		Additional Paid-In Capital		Treasury Shares		Accumulated Other Comprehensive Income (Loss)		Retained Earnings (Accumulated Deficit)		Total
Balance at December 31, 2016	44,301	4,477	$	488	$	573,662	$	(217,483)	$	(170,154)	$	258,540	$	445,053
Net income	—	—		—		—		—		—		210,668		210,668
Other comprehensive income	—	—		—		—		—		3,135		—		3,135
Stock-based compensation activity	440	(440)		—		3,128		15,674		—		—		18,802
Purchase of treasury shares	(1,038)	1,038		—		—		(61,864)		—		—		(61,864)
Dividends on ordinary shares ($1.02 per share)	—	—		—		—		—		—		(45,752)		(45,752)
Balance at September 30, 2017	43,703	5,075	$	488	$	576,790	$	(263,673)	$	(167,019)	$	423,456	$	570,042
Balance at December 31, 2015	48,778	—	$	488	$	556,532	$	—	$	(149,717)	$	(18,289)	$	389,014
Adoption of new accounting standard	—	—		—		915		—		—		(915)		—
Net income	—	—		—		—		—		—		239,805		239,805
Other comprehensive income	—	—		—		—		—		1,042		—		1,042
Stock-based compensation activity	25	(25)		—		14,057		914		—		—		14,971
Purchase of treasury shares	(4,150)	4,150		—		—		(194,079)		—		—		(194,079)
Dividends on ordinary shares ($0.60 per share)	—	—		—		—		—		—		(27,316)		(27,316)
Balance at September 30, 2016	44,653	4,125	$	488	$	571,504	$	(193,165)	$	(148,675)	$	193,285	$	423,437

The accompanying notes are an integral part of these condensed consolidated financial statements.

7

TRINSEO S.A.

Condensed Consolidated Statements of Cash Flows  

(In thousands)

(Unaudited)

	Nine Months Ended
	September 30,
	2017		2016
Cash flows from operating activities
Net income	$	210,668	$	239,805
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization		80,220		71,744
Amortization of deferred financing fees and issuance discount		3,968		4,469
Deferred income tax		(2,636)		9,895
Stock-based compensation expense		10,752		14,842
Earnings of unconsolidated affiliates, net of dividends		(4,097)		(8,972)
Unrealized net losses (gains) on foreign exchange forward contracts		(2,804)		3,533
Loss on extinguishment of long-term debt		65,260		—
Loss (gain) on sale of businesses and other assets		(10,473)		13,091
Impairment charges		4,293		14,310
Changes in assets and liabilities
Accounts receivable		(92,776)		(30,229)
Inventories		(57,315)		(27,605)
Accounts payable and other current liabilities		(989)		23,138
Income taxes payable		6,297		3,973
Other assets, net		(14,407)		(18,426)
Other liabilities, net		(1,116)		11,130
Cash provided by operating activities		194,845		324,698
Cash flows from investing activities
Capital expenditures		(108,875)		(82,678)
Cash paid to acquire a business, net of cash acquired		(79,650)		—
Proceeds from the sale of businesses and other assets		46,166		174
Distributions from unconsolidated affiliates		857		4,809
Cash used in investing activities		(141,502)		(77,695)
Cash flows from financing activities
Deferred financing fees		(19,175)		—
Short-term borrowings, net		(191)		(126)
Purchase of treasury shares		(65,225)		(194,079)
Dividends paid		(42,231)		(13,920)
Proceeds from exercise of option awards		8,349		203
Withholding taxes paid on restricted share units		(302)		(74)
Net proceeds from issuance of 2024 Term Loan B		700,000		—
Repayments of 2021 Term Loan B		(492,500)		(3,750)
Net proceeds from issuance of 2025 Senior Notes		500,000		—
Repayments of 2022 Senior Notes		(745,950)		—
Prepayment penalty on long-term debt		(52,978)		—
Cash used in financing activities		(210,203)		(211,746)
Effect of exchange rates on cash		10,449		(231)
Net change in cash and cash equivalents		(146,411)		35,026
Cash and cash equivalents—beginning of period		465,114		431,261
Cash and cash equivalents—end of period	$	318,703	$	466,287

The accompanying notes are an integral part of these condensed consolidated financial statements.

8

TRINSEO S.A.

Notes to Condensed Consolidated Financial Statements  

(Dollars in thousands, unless otherwise stated)

(Unaudited)

NOTE 1—BASIS OF PRESENTATION

The unaudited interim condensed consolidated financial statements of Trinseo S.A. and its subsidiaries (the “Company”) as of and for the periods ended September 30, 2017 and 2016 were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and reflect all adjustments, consisting only of normal recurring adjustments, which, in the opinion of management, are considered necessary for the fair statement of the results for the periods presented. Because they cover interim periods, the statements and related notes to the financial statements do not include all disclosures normally provided in annual financial statements and, therefore, these statements should be read in conjunction with the 2016 audited consolidated financial statements included within the Company’s Annual Report on Form 10-K (“Annual Report”) filed with the Securities and Exchange Commission (“SEC”) on March 1, 2017.

The December 31, 2016 condensed consolidated balance sheet data presented herein was derived from the Company’s December 31, 2016 audited consolidated financial statements, but does not include all disclosures required by GAAP for annual periods.

Certain prior year amounts have been reclassified to conform to the current period presentation. These reclassifications did not have a material impact on the Company’s financial position or results. Refer to Note 14 for further information.

NOTE 2—RECENT ACCOUNTING GUIDANCE

In May 2014, the Financial Accounting Standards Board (“FASB”) and the International Accounting Standards Board (“IASB”) jointly issued guidance which clarifies the principles for recognizing revenue and develops a common revenue standard for GAAP and International Financial Reporting Standards (“IFRS”). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additionally, the FASB has issued certain clarifying updates to this guidance, which the Company will consider as part of our adoption, which will be effective as of January 1, 2018. The Company has completed its scoping assessment for the adoption of this guidance by conducting surveys with relevant stakeholders in the business, including commercial and finance leadership, reviewing a representative sample of revenue arrangements across all businesses, and identifying a set of applicable qualitative revenue recognition changes related to the new standard update.  In completing this phase, the Company has identified its major revenue streams, which are concentrated within individual product sales within each of our reportable segments. As a result of this work, the Company has concluded that it will adopt this new guidance applying the modified retrospective approach.  The Company remains in the process of establishing and documenting key accounting policies, assessing new disclosure requirements, and evaluating impacts on business processes, information technology, and controls resulting from the adoption of this new standard. Additionally, while our final assessment has not been completed, we continue to progress in the quantification of the impacts that this standard will have on our consolidated financial statements and are refining certain estimates that will be used in order to calculate such impacts.

In July 2015, the FASB issued guidance which simplifies the subsequent measurement of inventory by replacing the lower of cost or market test with a lower of cost or net realizable value (“NRV”) test. NRV is calculated as the estimated selling price less reasonably predictable costs of completion, disposal and transportation. The Company adopted this guidance effective January 1, 2017, and the adoption did not have a material impact to the Company’s financial position or results of operations.

In February 2016, the FASB issued guidance related to leases that outlines a comprehensive lease accounting model and supersedes the current lease guidance. The new guidance requires lessees to recognize on the consolidated balance sheets lease liabilities and corresponding right-of-use assets for all leases with terms of greater than 12 months. It also changes the definition of a lease and expands the disclosure requirements of lease arrangements. This new guidance is effective for public companies for annual and interim periods beginning after December 15, 2018, with early adoption permitted. The new guidance must be adopted using a modified retrospective transition, and provides for certain practical expedients. The Company is in the process of assessing the impact on its consolidated financial

9

statements from the adoption of the new guidance. However, as we are the lessee under various real estate, railcar, and other equipment leases, which we currently account for as operating leases, we anticipate an increase in the recognition of right-of-use assets and lease liabilities as a result of this adoption.  

In August 2016, the FASB issued guidance that aims to eliminate diversity in practice for how certain cash receipts and payments are presented and classified in the consolidated statements of cash flows. Additionally, the FASB has issued further guidance related to the presentation of restricted cash on the consolidated statements of cash flows. The Company adopted this guidance effective September 30, 2017. The most significant impact of this adoption to the Company was the requirement to classify debt prepayment or extinguishment costs, which the Company had historically classified within cash flows from operating activities, as financing cash outflows. This change is reflected in the Company’s condensed consolidated statement of cash flows for the nine months ended September 30, 2017, including the impacts of the Company’s debt refinancing during the third quarter of 2017 (refer to Note 5 for further information). While this adoption was applied using the retrospective approach, there were no transactions during the nine months ended September 30, 2016 that required the condensed consolidated statement of cash flows for that period to be recast.

In January 2017, the FASB issued guidance that revises the definition of a business in order to assist in determining whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. Under the new guidance, fewer transactions are expected to be accounted for as business combinations. The Company adopted this guidance effective January 1, 2017. We expect this adoption could affect conclusions reached for future transactions in several areas, including acquisitions and disposals.

In January 2017, the FASB issued guidance to simplify the accounting for goodwill impairment by removing Step 2 of the test, which requires a hypothetical purchase price allocation. As a result, a goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The Company adopted this guidance effective January 1, 2017, which did not have a material impact to the Company’s financial position or results of operations.

In March 2017, the FASB issued guidance that requires employers to present the service cost component of net periodic benefit cost in the same statement of operations line item as other employee compensation costs arising from services rendered during the period. The other components of net periodic benefit cost are to be presented outside of any subtotal of operating income. This presentation amendment is relevant to the Company and will be applied on a retrospective basis. This guidance is effective for fiscal years and interim periods beginning after December 15, 2017, and early adoption is permitted. The Company is currently assessing the impact of adopting this guidance on its results of operations.

In August 2017, the FASB issued significant amendments to existing hedge accounting guidance. Among other things, this guidance will make more financial and nonfinancial hedging strategies eligible for hedge accounting, amend presentation and disclosure requirements, and change how companies assess effectiveness. This guidance is required for public companies for annual and interim periods beginning after December 15, 2018, with early adoption permitted. The Company is currently assessing the timing and related impact of adopting this guidance on its financial position and results of operations.

NOTE 3—INVESTMENTS IN UNCONSOLIDATED AFFILIATES

During the nine months ended September 30, 2017, the Company had two joint ventures: Americas Styrenics LLC (“Americas Styrenics”, a styrene and polystyrene joint venture with Chevron Phillips Chemical Company LP) and Sumika Styron Polycarbonate Limited (“Sumika Styron Polycarbonate”, a polycarbonate joint venture with Sumitomo Chemical Company Limited). Investments held in the unconsolidated affiliates are accounted for by the equity method. The results of Americas Styrenics are included within its own reporting segment, and the results of Sumika Styron Polycarbonate were included within the Basic Plastics reporting segment until the Company sold its 50% share of the entity in January 2017. Refer to the discussion below for further information about the sale of the Company’s share in Sumika Styron Polycarbonate during the first quarter of 2017.

Both of the unconsolidated affiliates are privately held companies; therefore, quoted market prices for their stock are not available. The summarized financial information of the Company’s unconsolidated affiliates is shown below. This table includes summarized financial information for Sumika Styron Polycarbonate through the date of sale in January 2017.

Three Months Ended	Nine Months Ended
September 30,	September 30,

10

	2017		2016		2017		2016
Sales	$	458,744	$	460,305	$	1,369,572	$	1,241,908
Gross profit	$	90,594	$	84,095	$	176,352	$	240,366
Net income	$	81,059	$	65,041	$	141,508	$	188,853

Americas Styrenics

As of September 30, 2017 and December 31, 2016, respectively, the Company’s investment in Americas Styrenics was $161.9 million and $149.7 million, which was $49.1 million and $71.2 million less than the Company’s 50% share of the underlying net assets of Americas Styrenics. This amount represents the difference between the book value of assets contributed to the joint venture at the time of formation (May 1, 2008) and the Company’s 50% share of the total recorded value of the joint venture’s assets and certain adjustments to conform with the Company’s accounting policies. This difference is being amortized over a weighted average remaining useful life of the contributed assets of approximately 3.1 years as of September 30, 2017. The Company received dividends from Americas Styrenics of $35.0 million and $80.0 million during the three and nine months ended September 30, 2017, respectively, compared to $40.0 million and $100.0 million during the three and nine months ended September 30, 2016, respectively.

Sumika Styron Polycarbonate

On January 31, 2017, the Company completed the sale of its 50% share in Sumika Styron Polycarbonate to Sumitomo Chemical Company Limited for total sales proceeds of approximately $42.1 million. As a result, the Company recorded a gain on sale of $9.3 million during the nine months ended September 30, 2017, which was included within “Other expense (income), net” in the condensed consolidated statement of operations and was allocated entirely to the Basic Plastics segment. In addition, the parties have entered into a long-term agreement to continue sourcing polycarbonate resin from Sumika Styron Polycarbonate to the Company’s Performance Plastics segment.

As of December 31, 2016, the Company’s investment in Sumika Styron Polycarbonate was $41.8 million. Due to the sale in January 2017, the Company no longer has an investment in Sumika Styron Polycarbonate as of September 30, 2017. The Company received dividends from Sumika Styron Polycarbonate of zero and $9.8 million during the three and nine months ended September 30, 2017,  respectively, compared to  zero and $6.2 million during the three and nine months ended September 30, 2016, respectively. The dividend received during the nine months ended September 30, 2017 from Sumika Styron Polycarbonate related to the Company’s proportionate share of earnings for the year ended December 31, 2016.

NOTE 4—INVENTORIES

Inventories consisted of the following:

	September 30,		December 31,
	2017		2016
Finished goods	$	239,663	$	187,577
Raw materials and semi-finished goods		211,186		168,804
Supplies		32,309		28,964
Total	$	483,158	$	385,345

NOTE 5—DEBT

Refer to discussion below for details of the Company’s debt refinancing that occurred during the third quarter of 2017. For definitions of capitalized terms not included herein, refer to the Annual Report. The Company was in compliance with all debt related covenants as of September 30, 2017 and December 31, 2016.

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As of September 30, 2017 and December 31, 2016, debt consisted of the following:

			September 30, 2017
	Interest Rate as of September 30, 2017	Maturity Date	Carrying Amount		Unamortized Deferred Financing Fees(1)		Total Debt, Less Unamortized Deferred Financing Fees
Senior Credit Facility
2022 Revolving Facility(2)	Various	September 2022	$	—	$	—	$	—
2024 Term Loan B(3)	3.735%	September 2024		700,000		(18,957)		681,043
2025 Senior Notes	5.375%	September 2025		500,000		(9,600)		490,400
Accounts Receivable Securitization Facility(4)	Various	May 2019		—		—		—
Other indebtedness	Various	Various		1,481		—		1,481
Total debt			$	1,201,481	$	(28,557)	$	1,172,924
Less: current portion								(7,000)
Total long-term debt, net of unamortized deferred financing fees							$	1,165,924

			December 31, 2016
	Interest Rate as of December 31, 2016	Maturity Date	Carrying Amount		Unamortized Deferred Financing Fees(1)		Total Debt, Less Unamortized Deferred Financing Fees
2020 Senior Credit Facility
2020 Revolving Facility	Various	May 2020	$	—	$	—	$	—
2021 Term Loan B	4.250%	November 2021		491,545		(9,159)		482,386
2022 Senior Notes
USD Notes	6.750%	May 2022		300,000		(5,726)		294,274
Euro Notes	6.375%	May 2022		394,275		(7,157)		387,118
Accounts Receivable Securitization Facility	Various	May 2019		—		—		—
Other indebtedness	Various	Various		1,591		—		1,591
Total debt			$	1,187,411	$	(22,042)	$	1,165,369
Less: current portion								(5,000)
Total long-term debt, net of unamortized deferred financing fees							$	1,160,369

(1) This caption does not include deferred financing fees related to the Company’s revolving facilities, which are included within “Deferred charges and other assets” on the condensed consolidated balance sheets.

(2) The Company had $357.2 million (net of $17.8 million outstanding letters of credit) of funds available for borrowing under this facility as of September 30, 2017. Additionally, the Company is required to pay a quarterly commitment fee in respect of any unused commitments under this facility equal to 0.375% per annum.

(3) The 2024 Term Loan B bears an interest rate of LIBOR plus 2.50%, subject to a 0.00% LIBOR floor. As of September 30, 2017, $7.0 million of the scheduled future payments related to this facility were classified as current debt on the Company’s condensed consolidated balance sheet.

(4) This facility has a borrowing capacity of $200.0 million. As of September 30, 2017, the Company had approximately $148.8 million of accounts receivable available to support this facility, based on the pool of eligible accounts receivable. In regards to outstanding borrowings, fixed interest charges are 2.6% plus variable commercial paper rates, while for available, but undrawn commitments, fixed interest charges are 1.4%.

2020 Senior Credit Facility

On May 5, 2015, the Company entered into a credit agreement which included $825.0 million of senior secured financing (the “2020 Senior Credit Facility”), inclusive of a $325.0 million revolving credit facility maturing in May 2020 (the “2020 Revolving Facility”) and a $500.0 million senior secured term loan B facility maturing in November 2021 (the “2021 Term Loan B”).

In September 2017, upon completion of the refinancing transactions discussed below, the Company terminated the 2020 Senior Credit Facility. Prior to this termination, the Company had no outstanding borrowings under the 2020 Revolving Facility and had $490.0 million outstanding under the 2021 Term Loan B, excluding unamortized original

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issue discount. As a result of this termination, the Company recognized a $0.8 million loss on extinguishment of long-term debt, comprised entirely of the write-off of a portion of the existing unamortized deferred financing fees and unamortized original issue discount related to the 2021 Term Loan B. The remaining unamortized deferred financing fees and unamortized original issue discount for both the 2020 Revolving Facility and 2021 Term Loan B remain capitalized and will be amortized along with new deferred financing fees over the life of the new facilities, discussed in further detail below.

Senior Credit Facility

On September 6, 2017, Trinseo Materials Operating S.C.A. and Trinseo Materials Finance, Inc. (together, the “Borrowers” or “Issuers”), both wholly-owned subsidiaries of the Company, entered into a senior secured credit agreement (the “Credit Agreement”), which provides senior secured financing of up to $1,075.0 million (the “Senior Credit Facility”). The Senior Credit Facility provides for senior secured financing consisting of a (i) $375.0 million revolving credit facility, with a $25.0 million swingline subfacility and a $35.0 million letter of credit subfacility maturing in September 2022 (the “2022 Revolving Facility”) and a (ii) $700.0 million senior secured term loan B facility maturing in September 2024 (the “2024 Term Loan B”). Amounts under the 2022 Revolving Facility are available in U.S. dollars and euros.

The 2024 Term Loan B bears an interest rate of LIBOR plus 2.50%, subject to a 0.00% LIBOR floor. Further, the 2024 Term Loan B requires scheduled quarterly payments in amounts equal to 0.25% of the original principal amount of the 2024 Term Loan B, with the balance to be paid at maturity.

Loans under the 2022 Revolving Facility, at the Borrowers’ option, may be maintained as (a) LIBO rate loans, which bear interest at a rate per annum equal to the LIBO rate plus the applicable margin (as defined in the Credit Agreement), if applicable, or (b) base rate loans which shall bear interest at a rate per annum equal to the base rate plus the applicable margin (as defined in the Credit Agreement).

The Senior Credit Facility is collateralized by a security interest in substantially all of the assets of the Borrowers, and the guarantors thereunder, including Trinseo Materials S.à r.l., certain Luxembourg subsidiaries and certain foreign subsidiaries organized in the United States, The Netherlands, Hong Kong, Singapore, Ireland, Germany and Switzerland.

 The Senior Credit Facility requires the Borrowers and their restricted subsidiaries to comply with customary affirmative, negative and financial covenants, including limitations on their abilities to incur liens; make certain loans and investments; incur additional debt (including guarantees or other contingent obligations); merge, consolidate liquidate or dissolve; transfer or sell assets; pay dividends and other distributions to shareholders or make certain other restricted payments; enter into transactions with affiliates; restrict any restricted subsidiary from paying dividends or making other distributions or agree to certain negative pledge clauses; materially alter the business we conduct; prepay certain other indebtedness; amend certain material documents; and change our fiscal year.

The 2022 Revolving Facility contains a financial covenant that requires compliance with a springing first lien net leverage ratio test. If the outstanding balance under the 2022 Revolving Facility exceeds 30% of the $375.0 million borrowing capacity (excluding undrawn letters of credit up to $10.0 million and cash collateralized letters of credit) at a quarter end, then the Borrowers’ first lien net leverage ratio may not exceed 2.00 to 1.00. As of September 30, 2017, the Company was in compliance with all debt covenant requirements under the Senior Credit Facility.

Fees incurred in connection with the issuance of the 2024 Term Loan B were $12.3 million. Due to a portion of the 2024 Term Loan B meeting the criteria for modification accounting, $1.2 million of these fees were expensed and included within “Other expense (income), net” in the condensed consolidated statement of operations for the three and nine months ended September 30, 2017. The remaining $11.1 million of fees were capitalized and recorded within “Long-term debt, net of unamortized deferred financing fees” on the condensed consolidated balance sheet, to be amortized along with the remaining $8.1 million of unamortized deferred financing fees from the 2021 Term Loan B. Capitalized fees related to the 2024 Term Loan B are being amortized over the 7.0 year term of the facility using the effective interest method.

Fees incurred in connection with the issuance of the 2022 Revolving Facility were $0.8 million and were capitalized and recorded within “Deferred charges and other assets” in the condensed consolidated balance sheets. The new capitalized fees related to the 2022 Revolving Facility (along with $4.0 million of unamortized deferred financing fees from the 2020 Revolving Facility) are being amortized over the 5.0 year term of the facility using the straight-line method. Amortization of deferred financing fees are recorded within “Interest expense, net” in the condensed consolidated statements of operations.

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2022 Senior Notes

In May 2015, the Company issued $300.0 million aggregate principal amount of 6.750% senior notes due May 1, 2022 (the “USD Notes”) and €375.0 million aggregate principal amount of 6.375% senior notes due May 1, 2022 (the “Euro Notes”, and together with the USD Notes, the “2022 Senior Notes”).

On September 7, 2017, using the net proceeds from the issuance of the 2024 Term Loan B, together with the net proceeds from the issuance of the 2025 Senior Notes (defined and discussed below), and available cash, the Company redeemed all outstanding borrowings under the 2022 Senior Notes, totaling $746.0 million in USD-equivalent principal, together with a total combined call premium of $53.0 million (with a redemption price of approximately 106.572% on the USD Notes and a redemption price of approximately 107.459% on the Euro Notes), and accrued and unpaid interest thereon of $17.0 million, using applicable foreign exchange rates.

As a result of this redemption, during the three months ended September 30, 2017, the Company recorded a loss on extinguishment of long-term debt of $64.5 million, which includes the above $53.0 million call premium and an $11.5 million write-off of unamortized deferred financing fees related to the 2022 Senior Notes.

2025 Senior Notes

On August 29, 2017, the Issuers executed an indenture pursuant to which they issued $500.0 million aggregate principal amount of 5.375% senior notes due 2025 (the “2025 Senior Notes”) in a 144A private transaction exempt from the registration requirements of the Securities Act of 1933, as amended. Interest on the 2025 Senior Notes is payable semi-annually on May 3 and November 3 of each year, commencing on May 3, 2018. The 2025 Senior Notes mature on September 1, 2025.

At any time prior to September 1, 2020, the Issuers may redeem the 2025 Senior Notes in whole or in part, at their option, at a redemption price equal to 100% of the principal amount of such notes plus the relevant applicable premium as of, and accrued and unpaid interest to, but not including, the redemption date. At any time and from time to time after September 1, 2020, the Issuers may redeem the 2025 Senior Notes, in whole or in part, at a redemption price equal to the percentage of principal amount set forth below plus accrued and unpaid interest, if any, on the notes redeemed to, but not including, the redemption date:

12-month period commencing September 1 in Year	Percentage
2020	102.688	%
2021	101.792	%
2022	100.896	%
2023 and thereafter	100.000	%

At any time prior to September 1, 2020, the Issuers may redeem up to 40% of the aggregate principal amount of the 2025 Senior Notes at a redemption price equal to 105.375%, plus accrued and unpaid interest to, but not including, the redemption date, with the aggregate gross proceeds from certain equity offerings.

The 2025 Senior Notes are the Issuers’ senior unsecured obligations and rank equally in right of payment with all of the Issuers’ existing and future indebtedness that is not expressly subordinated in right of payment thereto. The 2025 Senior Notes will be senior in right of payment to any future indebtedness that is expressly subordinated in right of payment thereto and effectively junior to (a) the Issuers’ existing and future secured indebtedness, including the Company’s accounts receivable facility and the Issuers’ Senior Credit Facility (discussed above), to the extent of the value of the collateral securing such indebtedness and (b) all existing and future liabilities of the Issuers’ non-guarantor subsidiaries.

The Indenture contains customary covenants that, among other things, limit the Issuers’ and certain of their subsidiaries’ ability to incur additional indebtedness and guarantee indebtedness; pay dividends on, redeem or repurchase capital stock; make investments; prepay certain indebtedness; create liens; enter into transactions with the Issuers’ affiliates; designate the Issuers’ subsidiaries as Unrestricted Subsidiaries (as defined in the Indenture); and consolidate, merge, or transfer all or substantially all of the Issuers’ assets. The covenants are subject to a number of exceptions and qualifications. Certain of these covenants will be suspended during any period of time that (1) the 2025 Senior Notes have investment grade ratings (as defined in the Indenture) and (2) no default has occurred and is continuing under the Indenture. In the event that the 2025 Senior Notes are downgraded to below an investment grade rating, the Issuers and certain subsidiaries will again be subject to the suspended covenants with respect to future events. As of September 30, 2017, the Company was in compliance with all debt covenant requirements under the Indenture.

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Fees and expenses incurred in connection with the issuance of the 2025 Senior Notes were $9.7 million, which were capitalized and recorded within “Long-term debt, net of unamortized deferred financing fees” on the condensed consolidated balance sheet, and are being amortized into “Interest expense, net” in the condensed consolidated statements of operations over their 8.0 year term using the effective interest method.

NOTE 6—GOODWILL AND INTANGIBLE ASSETS

Goodwill

The following table shows changes in the carrying amount of goodwill by segment from December 31, 2016 to September 30, 2017:

	Performance Materials						Basic Plastics & Feedstocks
	Latex		Synthetic		Performance		Basic				Americas
	Binders		Rubber		Plastics		Plastics		Feedstocks		Styrenics		Total
Balance at December 31, 2016	$	11,544	$	8,177	$	4,210	$	5,554	$	—	$	—	$	29,485
Acquisition (Note 13)		—		—		28,598		—		—		—		28,598
Foreign currency impact		1,415		1,002		1,592		682		—		—		4,691
Balance at September 30, 2017	$	12,959	$	9,179	$	34,400	$	6,236	$	—	$	—	$	62,774

Other Intangible Assets

The following table provides information regarding the Company’s other intangible assets as of September 30, 2017 and December 31, 2016, respectively:

		September 30, 2017						December 31, 2016
	Estimated	Gross						Gross
	Useful Life	Carrying		Accumulated				Carrying		Accumulated
	(Years)	Amount		Amortization		Net		Amount		Amortization		Net
Developed technology(1)	9 - 15	$	198,535	$	(91,078)	$	107,457	$	166,230	$	(72,159)	$	94,071
Customer Relationships(1)	19		14,520		(171)		14,349		—		—		—
Manufacturing Capacity Rights	6		22,426		(12,728)		9,698		19,977		(8,908)		11,069
Software	5 - 10		87,412		(22,617)		64,795		82,275		(15,095)		67,180
Software in development	N/A		8,617		—		8,617		4,751		—		4,751
Other(1)	3		3,056		(153)		2,903		274		—		274
Total		$	334,566	$	(126,747)	$	207,819	$	273,507	$	(96,162)	$	177,345

(1) Balances as of September 30, 2017 include assets acquired related to the acquisition of API Applicazioni Plastiche Industriali S.p.A (“API Plastics”). Refer to Note 13 for further information.

Amortization expense on other intangible assets totaled $7.2 million and $19.6 million for the three and nine months ended September 30, 2017, respectively, and $5.0 million and $15.2 million for the three and nine months ended September 30, 2016.

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In addition to the significant accounting policies disclosed in Note 2 in our Annual Report, Basis of Presentation and Summary of Significant Accounting Policies, the Company notes the following significant accounting policies related to certain definite-lived intangible assets, for which we had substantial activity during the quarter ended September 30, 2017 as a result of the API Plastics acquisition.

Developed Technology

Acquired developed technology is recorded at fair value upon acquisition and is amortized using the straight-line method over the estimated useful life ranging from 9 years to 15 years. We determine amortization periods for developed technology based on our assessment of various factors impacting estimated useful lives and timing and extent of estimated cash flows of the acquired assets. This includes estimates of expected period of future economic benefit and competitive advantage related to existing processes and procedures at the date of acquisition. Significant changes to any of these factors may result in a reduction in the useful life of these assets.

Customer Relationships

Customer relationships are recorded at fair value upon acquisition and are amortized using the straight-line method over the estimated useful life of 19 years. We determine amortization periods for customer relationships based on our assessment of various factors impacting estimated useful lives and timing and extent of estimated cash flows of the acquired assets. This includes estimates of expected period of future economic benefit and customer retention rates. Significant changes to any of these factors may result in a reduction in the useful life of these assets.

NOTE 7—DERIVATIVE INSTRUMENTS

The Company’s ongoing business operations expose it to various risks, including fluctuating foreign exchange rates and interest rate risk. To manage these risks, the Company periodically enters into derivative financial instruments, such as foreign exchange forward contracts and interest rate swap agreements. The Company does not hold or enter into financial instruments for trading or speculative purposes. All derivatives are recorded on the condensed consolidated balance sheets at fair value.

Foreign Exchange Forward Contracts

Certain subsidiaries have assets and liabilities denominated in currencies other than their respective functional currencies, which creates foreign exchange risk. The Company’s principal strategy in managing its exposure to changes in foreign currency exchange rates is to naturally hedge the foreign currency-denominated liabilities on our balance sheet against corresponding assets of the same currency such that any changes in liabilities due to fluctuations in exchange rates are offset by changes in their corresponding foreign currency assets. In order to further reduce its exposure, the Company also uses foreign exchange forward contracts to economically hedge the impact of the variability in exchange rates on our assets and liabilities denominated in certain foreign currencies. These derivative contracts are not designated for hedge accounting treatment.

As of September 30, 2017, the Company had open foreign exchange forward contracts with a notional U.S. dollar equivalent absolute value of $327.9 million. The following table displays the notional amounts of the most significant net foreign exchange hedge positions outstanding as of September 30, 2017.

	September 30,
Buy / (Sell)	2017
Euro	$	(161,885)
Chinese Yuan	$	(58,335)
Indonesian Rupiah	$	(29,493)
Swiss Franc	$	16,762
Korean Won	$	(10,983)

Foreign Exchange Cash Flow Hedges

The Company also enters into forward contracts with the objective of managing the currency risk associated with forecasted U.S. dollar-denominated raw materials purchases by one of its subsidiaries whose functional currency is the euro. By entering into these forward contracts, which are designated as cash flow hedges, the Company buys a designated amount of U.S. dollars and sells euros at the prevailing market rate to mitigate the risk associated with the

16

fluctuations in the euro-to-U.S. dollar foreign currency exchange rates. The qualifying hedge contracts are marked-to-market at each reporting date and any unrealized gains or losses are included in accumulated other comprehensive income/loss (“AOCI”) to the extent effective, and reclassified to cost of sales in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur.

Open foreign exchange cash flow hedges as of September 30, 2017 have maturities occurring over a period of 15 months, and have a net notional U.S. dollar equivalent of $196.5 million.

Interest Rate Swaps

As discussed in Note 5, on September 6, 2017, the Company issued the 2024 Term Loan B, which bears an interest rate of LIBOR plus 2.50%, subject to a 0.00% LIBOR floor. In order to reduce the variability in interest payments associated with the Company’s variable rate debt, during the third quarter of 2017, the Company entered into certain interest rate swap agreements to convert a portion of these variable rate borrowings into a fixed rate obligation. These interest rate swap agreements are designated as cash flow hedges, and as such, the contracts are marked-to-market at each reporting date and any unrealized gains or losses are included in AOCI to the extent effective, and reclassified to interest expense in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur.

As of September 30, 2017, the Company had open interest rate swap agreements with a net notional U.S. dollar equivalent of $200.0 million which had an effective date of September 29, 2017 and mature over a period of five years.

Net Investment Hedge

Through August 31, 2017, the Company had designated a portion (€280 million) of the original principal amount of the Company’s previous €375.0 million Euro Notes as a hedge of the foreign currency exposure of the Issuers’ net investment in certain European subsidiaries. Effective September 1, 2017, the Company de-designated the Euro Notes as a net investment hedge of the Issuers’ net investment in certain European subsidiaries, as the Euro Notes were redeemed on September 7, 2017 (refer to Note 5 for further information). Through the date of de-designation, this hedge was deemed to be highly effective, and changes in the Euro Notes’ carrying value resulting from fluctuations in the euro exchange rate were recorded as cumulative foreign currency translation loss of $24.1 million within AOCI as of September 30, 2017.

On August 29, 2017, the Issuers executed an indenture pursuant to which they issued the $500.0 million 5.375% 2025 Senior Notes (refer to Note 5 for further information). Subsequently, on September 1, 2017, the Company entered into certain fixed-for-fixed cross currency swaps (“CCS”), swapping USD principal and interest payments on the newly issued 2025 Senior Notes for euro-denominated payments. Under the terms of the CCS, the Company has notionally exchanged $500.0 million at an interest rate of 5.375% for €420 million at a weighted-average interest rate of 3.45% for approximately five years.

Effective September 1, 2017, the Company designated the full notional amount of the CCS (€420 million) as a hedge of the Issuers’ net investment in certain European subsidiaries. As the CCS were deemed to be highly effective hedges, changes in the fair value of the CCS were recorded as cumulative foreign currency translation loss of $7.1 million within AOCI as of September 30, 2017.

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Summary of Derivative Instruments

Information regarding changes in the fair value of the Company’s derivative instruments, net of tax, including those not designated for hedge accounting treatment, is as follows:

	Gain (Loss) Recognized in				Gain (Loss) Recognized in
	AOCI on Balance Sheet				Statement of Operations
	Three Months Ended September 30,								Statement of Operations
	2017		2016		2017		2016		Classification
Designated as Cash Flow Hedges
Foreign exchange cash flow hedges	$	(4,458)	$	(2,280)	$	(2,666)	$	245	Cost of sales
Interest rate swaps		743		—		(6)		—	Interest expense, net
Total	$	(3,715)	$	(2,280)	$	(2,672)	$	245
Net Investment Hedges
Euro Notes	$	(13,924)	$	(2,128)	$	—	$	—
Cross-currency swaps (CCS)		(7,112)		—		—		—
Total	$	(21,036)	$	(2,128)	$	—	$	—
Not Designated as Cash Flow Hedges
Foreign exchange forward contracts	$	—	$	—	$	(6,526)	$	1,060	Other expense (income), net
Total	$	—	$	—	$	(6,526)	$	1,060

	Gain (Loss) Recognized in				Gain (Loss) Recognized in
	AOCI on Balance Sheet				Statement of Operations
	Nine Months Ended September 30,								Statement of Operations
	2017		2016		2017		2016		Classification
Designated as Cash Flow Hedges
Foreign exchange cash flow hedges	$	(22,234)	$	(3,676)	$	794	$	616	Cost of sales
Interest rate swaps		743		—		(6)		—	Interest expense, net
Total	$	(21,491)	$	(3,676)	$	788	$	616
Net Investment Hedges
Euro Notes	$	(38,584)	$	(4,615)	$	—	$	—
Cross-currency swaps (CCS)		(7,112)		—		—		—
Total	$	(45,696)	$	(4,615)	$	—	$	—
Not Designated as Cash Flow Hedges
Foreign exchange forward contracts	$	—	$	—	$	(17,036)	$	2,054	Other expense (income), net
Total	$	—	$	—	$	(17,036)	$	2,054

The Company recorded losses of $6.5 million and $17.0 million during the three and nine months ended September 30, 2017, respectively, and gains of $1.1 million and $2.1 million during the three and nine months ended September 30, 2016, respectively, from settlements and changes in the fair value of outstanding forward contracts (not designated as hedges). The gains and losses from these forward contracts offset net foreign exchange transaction gains of $8.2 million and $16.1 million during the three and nine months ended September 30, 2017, respectively, and losses of $1.5 million and $4.1 million during the three and nine months ended September 30, 2016, respectively, which resulted from the remeasurement of the Company’s foreign currency denominated assets and liabilities. The cash settlements of these foreign exchange forward contracts are included within operating activities in the condensed consolidated statement of cash flows.

As of September 30, 2017, the Company had no ineffectiveness related to its derivatives designated as hedging instruments. Further, the Company expects to reclassify in the next twelve months an approximate $10.3 million net loss from AOCI into earnings related to the Company’s outstanding foreign exchange cash flow hedges and interest rate swaps as of September 30, 2017 based on current foreign exchange rates.

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The following table summarizes the net unrealized gains and losses and balance sheet classification of outstanding derivatives recorded in the condensed consolidated balance sheets:

	September 30, 2017										December 31, 2016
	Foreign Exchange		Foreign Exchange		Interest		Cross-				Foreign Exchange		Foreign Exchange
	Forward		Cash Flow		Rate		Currency				Forward		Cash Flow
Balance Sheet Classification	Contracts		Hedges		Swaps		Swaps		Total		Contracts		Hedges		Total
Asset Derivatives:
Accounts receivable, net of allowance	$	3,368	$	—	$	—	$	6,420	$	9,788	$	1,664	$	11,018	$	12,682
Deferred charges and other assets		—		—		1,432		—		1,432		—		—		—
Total asset derivatives	$	3,368	$	—	$	1,432	$	6,420	$	11,220	$	1,664	$	11,018	$	12,682
Liability Derivatives:
Accounts payable	$	117	$	9,612	$	688	$	—	$	10,417	$	511	$	—	$	511
Other noncurrent obligations		—		2,148		—		13,531		15,679		—		—		—
Total liability derivatives	$	117	$	11,760	$	688	$	13,531	$	26,096	$	511	$	—	$	511

Forward contracts, interest rate swaps, and cross currency swaps are entered into with a limited number of counterparties, each of which allows for net settlement of all contracts through a single payment in a single currency in the event of a default on or termination of any one contract. As such, in accordance with the Company’s accounting policy, we record these derivative instruments on a net basis by counterparty within the condensed consolidated balance sheet. Information regarding the gross amounts of the Company’s derivative instruments and the amounts offset in the condensed consolidated balance sheets is as follows:

	Gross Amounts		Gross Amounts		Net Amounts
	Recognized in the		Offset in the		Presented in the
	Balance Sheet		Balance Sheet		Balance Sheet
Balance at September 30, 2017
Derivative assets	$	12,793	$	(1,573)	$	11,220
Derivative liabilities		27,669		(1,573)		26,096
Balance at December 31, 2016
Derivative assets	$	23,401	$	(10,719)	$	12,682
Derivative liabilities		11,230		(10,719)		511

Refer to Notes 8 and 16 of the condensed consolidated financial statements for further information regarding the fair value of the Company’s derivative instruments and the related changes in AOCI.

NOTE 8—FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities measured at fair value are classified using the following hierarchy, which is based upon the transparency of inputs to the valuation as of the measurement date.

Level 1—Valuation is based upon quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2—Valuation is based upon quoted prices for similar assets and liabilities in active markets, or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

Level 3—Valuation is based upon other unobservable inputs that are significant to the fair value measurement.

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The following table summarizes the basis used to measure certain assets and liabilities at fair value on a recurring basis in the condensed consolidated balance sheets as of September 30, 2017 and December 31, 2016.

	September 30, 2017
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	3,368	$	—	$	3,368
Foreign exchange forward contracts—(Liabilities)		—		(117)		—		(117)
Foreign exchange cash flow hedges—(Liabilities)		—		(11,760)		—		(11,760)
Interest rate swaps—Assets		—		1,432		—		1,432
Interest rate swaps—(Liabilities)		—		(688)		—		(688)
Cross-currency swaps—Assets		—		6,420		—		6,420
Cross-currency swaps—(Liabilities)		—		(13,531)		—		(13,531)
Total fair value	$	—	$	(14,876)	$	—	$	(14,876)

	December 31, 2016
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	1,664	$	—	$	1,664
Foreign exchange forward contracts—(Liabilities)		—		(511)		—		(511)
Foreign exchange cash flow hedges—Assets		—		11,018		—		11,018
Total fair value	$	—	$	12,171	$	—	$	12,171

The Company uses an income approach to value its derivative instruments, utilizing discounted cash flow techniques, considering the terms of the contract and observable market information available as of the reporting date, such as interest rate yield curves and currency spot and forward rates. Significant inputs to the valuation for these derivative instruments are obtained from broker quotations or from listed or over-the-counter market data, and are classified as Level 2 in the fair value hierarchy.

Fair Value of Debt Instruments

The following table presents the estimated fair value of the Company’s outstanding debt not carried at fair value as of September 30, 2017 and December 31, 2016, respectively:

	As of		As of
	September 30, 2017		December 31, 2016
2025 Senior Notes	$	515,625	$	—
2022 Senior Notes
USD Notes		—		315,000
Euro Notes		—		424,437
2024 Term Loan B		707,441		—
2021 Term Loan B		—		498,041
Total fair value	$	1,223,066	$	1,237,478

The fair value of the Company’s debt facilities above (each Level 2 securities) is determined using over-the-counter market quotes and benchmark yields received from independent vendors.

There were no other significant financial instruments outstanding as of September 30, 2017 and December 31, 2016.

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NOTE 9—PROVISION FOR INCOME TAXES

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2017			2016			2017			2016
Effective income tax rate		20.0	%		19.2	%		21.1	%		21.7	%

Provision for income taxes for the three and nine months ended September 30, 2017 were $8.3 million, resulting in an effective tax rate of 20.0%, and $56.4 million, resulting in an effective tax rate of 21.1%, respectively. Provision for income taxes for the three and nine months ended September 30, 2016 were $16.0 million, resulting in an effective tax rate of 19.2%, and $66.5 million, resulting in an effective tax rate of 21.7%, respectively.

While the effective tax rate for the three and nine months ended September 30, 2017 and 2016 remained relatively consistent, the rate was impacted by non-recurring items in both periods. 

The effective tax rate for the three and nine months ended September 30, 2017 was impacted by payments made of $10.9 million related to a portion of the fees associated with the call premium paid to retire the Company’s 2022 Senior Notes, which are not anticipated to provide a tax benefit to the Company in the future (refer to Note 5 for further information). The effective tax rate for the three and nine months ended September 30, 2016 was impacted by an impairment charge of $0.3 million and $13.2 million, respectively, for the estimated loss on sale of Trinseo Brazil. Refer to Note 13 for further information.

NOTE 10—COMMITMENTS AND CONTINGENCIES

Environmental Matters

Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated, based on current law, existing technologies and other information. Pursuant to the terms of the agreement associated with the Company’s formation, the pre-closing environmental conditions were retained by Dow and Dow has agreed to indemnify the Company from and against all environmental liabilities incurred or relating to the predecessor periods. No environmental claims have been asserted or threatened against the Company, and the Company is not a potentially responsible party at any Superfund Sites. As of September 30, 2017 and December 31, 2016, the Company had no accrued obligations for environmental remediation and restoration costs.

Inherent uncertainties exist in the Company’s potential environmental liabilities primarily due to unknown conditions, whether future claims may fall outside the scope of the indemnity, changing governmental regulations and legal standards regarding liability, and evolving technologies for handling site remediation and restoration. In connection with the Company’s existing indemnification, the possibility is considered remote that environmental remediation costs will have a material adverse impact on the condensed consolidated financial statements.

Purchase Commitments

In the normal course of business, the Company has certain raw material purchase contracts where it is required to purchase certain minimum volumes at current market prices. These commitments range from 1 to 5 years. In certain raw material purchase contracts, the Company has the right to purchase less than the required minimums and pay a liquidated damages fee, or, in case of a permanent plant shutdown, to terminate the contracts. In such cases, these obligations would be less than the annual commitment as disclosed in the consolidated financial statements included in the Annual Report.

Litigation Matters

From time to time, the Company may be subject to various legal claims and proceedings incidental to the normal conduct of business, relating to such matters as product liability, antitrust/competition, past waste disposal practices and release of chemicals into the environment. While it is impossible at this time to determine with certainty the ultimate outcome of these routine claims, the Company does not believe that the ultimate resolution of these claims will have a material adverse effect on the Company’s results of operations, financial condition or cash flow. Legal costs, including those legal costs expected to be incurred in connection with a loss contingency, are expensed as incurred.

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NOTE 11—PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

The components of net periodic benefit costs for all significant plans were as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Defined Benefit Pension Plans
Service cost	$	5,000	$	4,156	$	14,291	$	12,438
Interest cost		1,184		1,391		3,376		4,160
Expected return on plan assets		(450)		(492)		(1,285)		(1,474)
Amortization of prior service credit		(503)		(488)		(1,456)		(1,459)
Amortization of net loss		1,479		1,058		4,232		3,169
Net settlement and curtailment loss(1)		—		—		129		—
Net periodic benefit cost	$	6,710	$	5,625	$	19,287	$	16,834

(1) Represents a settlement loss of approximately $0.5 million triggered by benefit payments exceeding the sum of service and interest cost for one of the Company’s pension plans in Switzerland, partially offset by a curtailment gain of approximately $0.4 million related to a reduction in the number of participants in the Company’s pension plan in Japan.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Other Postretirement Plans
Service cost	$	53	$	67	$	161	$	196
Interest cost		63		135		189		385
Amortization of prior service cost		26		25		77		77
Amortization of net gain		(11)		(43)		(32)		(128)
Net periodic benefit cost	$	131	$	184	$	395	$	530

As of September 30, 2017 and December 31, 2016, the Company’s benefit obligations included primarily in “Other noncurrent obligations” in the condensed consolidated balance sheets were $221.6 million and $195.8 million, respectively. The net periodic benefit costs are recognized in the condensed consolidated statement of operations as “Cost of sales” and “Selling, general and administrative expenses.”

The Company made cash contributions and benefit payments to unfunded plans of approximately $1.7 million and $11.9 million during the three and nine months ended September 30, 2017, respectively. The Company expects to make additional cash contributions, including benefit payments to unfunded plans, of approximately $4.0 million to its defined benefit plans for the remainder of 2017.

NOTE 12—STOCK-BASED COMPENSATION

Refer to the Annual Report for definitions of capitalized terms not included herein and further background on the Company’s stock-based compensation programs included in the tables below.  

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The following table summarizes the Company’s stock-based compensation expense for the three and nine months ended September 30, 2017 and 2016, as well as unrecognized compensation cost as of September 30, 2017:

									As of
	Three Months Ended				Nine Months Ended				September 30, 2017
	September 30,				September 30,				Unrecognized		Weighted
	2017		2016		2017		2016		Compensation Cost		Average Years
RSUs	$	2,287	$	1,476	$	6,295	$	3,826	$	11,682	1.8
Options		454		733		3,661		4,867		1,659	1.4
PSUs		324		—		796		—		3,062	2.4
Restricted Stock Awards issued by Former Parent		—		3,817		—		6,149		—	—
Total Stock-based Compensation Expense	$	3,065	$	6,026	$	10,752	$	14,842

The following table summarizes awards granted and the respective weighted-average grant date fair value for the nine months ended September 30, 2017:

	Nine Months Ended
	September 30, 2017
	Awards Granted		Weighted Average Grant Date Fair Value per Award
RSUs		110,767	$	70.85
Options		192,546		20.61
PSUs		50,937		75.74

Option Awards

The following are the weighted-average assumptions used within the Black-Scholes pricing model for the Company’s option awards granted during the nine months ended September 30, 2017:

	Nine Months Ended
	September 30,
	2017
Expected term (in years)	5.50
Expected volatility	35.00	%
Risk-free interest rate	2.19	%
Dividend yield	2.00	%

Since the Company’s equity interests were privately held prior to its initial public offering (“IPO”) in June 2014, there is limited publicly available trading history of the Company’s ordinary shares. Until such time that the Company can determine expected volatility based solely on the publicly traded history of its ordinary shares, expected volatility used in the Black-Scholes model for option awards granted is based on a combination of the Company’s historical volatility and similar companies’ stock that are publicly traded. The expected term of option awards represents the period of time that option awards granted are expected to be outstanding. For the option awards granted during the nine months ended September 30, 2017, the simplified method was used to calculate the expected term, given the Company’s limited historical exercise data. The risk-free interest rate for the periods within the expected term of option awards is based on the U.S. Treasury yield curve in effect at the time of grant. The dividend yield is estimated based on historical and expected dividend activity.

Performance Share Units (PSUs)

The Company granted PSUs for the first time during the nine months ended September 30, 2017. The PSUs, which are granted to executives, cliff vest on the third anniversary of the date of grant, generally subject to the executive remaining continuously employed by the Company through the vesting date and achieving certain performance conditions. The number of the PSUs that vest upon completion of the service period can range from 0 to 200 percent of the original grant, subject to certain limitations, contingent upon the Company’s total shareholder return (“TSR”) during the performance period relative to a pre-defined set of industry peer companies. Upon a termination of employment due

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to the executive’s death or retirement, or termination in connection with a change in control or other factors prior to the vesting date, the PSUs will vest in full or in part, depending on the type of termination and the achievement of the performance conditions. Dividend equivalents will accumulate on PSUs during the vesting period, will be paid in cash upon vesting, and do not accrue interest. When PSUs vest, shares will be issued from the existing pool of treasury shares. The fair value for PSU awards is computed using a Monte Carlo valuation model.

NOTE 13—ACQUISITIONS AND DIVESTITURES

Acquisition of API Plastics

On July 10, 2017, the Company acquired 100% of the equity interests of API Applicazioni Plastiche Industriali S.p.A, or API Plastics, a privately held company. The gross purchase price for the acquisition was $90.5 million, inclusive of $8.4 million of cash acquired, yielding a net purchase price of $82.1 million. These amounts are subject to certain customary post-closing adjustments. During the nine months ended September 30, 2017, the Company paid $79.7 million for this acquisition, leaving an additional $2.4 million of unpaid purchase price accrued, which is expected to be paid during the fourth quarter of 2017. API Plastics, based in Mussolente, Italy, is a manufacturer of soft-touch polymers and bioplastics, such as thermoplastic elastomers (“TPEs”). TPEs can be molded over rigid plastics such as ABS and PC/ABS, which presents opportunities for complementary technology product offerings within our Performance Plastics segment. The acquisition was funded through existing cash on hand.

The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The excess of the purchase price over the aggregate fair values was recorded as goodwill. The Company calculated the fair value of the assets acquired using the income and cost approaches (or a combination thereof). Fair values were determined based on Level 3 inputs including estimated future cash flows, discount rates, royalty rates, growth rates, sales projections, retention rates and terminal values, all of which require significant management judgment.

The purchase price allocation is based upon preliminary information and is subject to change if additional information about the facts and circumstances that existed at the acquisition date becomes available. Additional information is being gathered to finalize these preliminary measurements, particularly with respect to property, plant and equipment, intangible assets, inventory, deferred income taxes and income taxes payable. Further adjustments may be necessary as a result of the Company’s on-going assessment of additional information related to the fair value of assets acquired and liabilities assumed, including goodwill, during the measurement period.

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The following table summarizes the preliminary fair value measurement of the assets acquired and liabilities assumed as of the date of acquisition:

	July 10,
	2017
Cash and cash equivalents	$	8,431
Accounts receivable		16,484
Inventories		10,282
Other current assets		728
Property, plant, and equipment		24,146
Other intangible assets(1)
Customer relationships		14,000
Developed technology		11,500
Other amortizable intangible assets		2,700
Total fair value of assets acquired	$	88,271
Accounts payable	$	12,219
Income taxes payable		202
Accrued expenses and other current liabilities		1,416
Deferred income tax liabilities—noncurrent		11,262
Other noncurrent obligations		1,277
Total fair value of liabilities assumed	$	26,376
Net identifiable assets acquired	$	61,895
Goodwill(2)		28,598
Net assets acquired	$	90,493

(1) The expected lives of the acquired intangible assets are 19 years for customer relationships, 9 years for developed technology, and 3 years for other amortizable intangible assets.

(2) Goodwill consists of expected operating synergies resulting from combining API Plastics with our existing businesses, and is allocated entirely to the Performance Plastics segment. None of the goodwill related to this acquisition will be deductible for income tax purposes.

During the three and nine months ended September 30, 2017, transaction and integration costs related to advisory and professional fees incurred in conjunction with the API Plastics acquisition were $2.4 million and $3.5 million, respectively, and were included within “Selling, general and administrative expenses” in the condensed consolidated statement of operations. Additionally, during the three and nine months ended September 30, 2017, the Company recorded a $1.3 million non-cash fair value inventory adjustment related to the API Plastics acquisition which was included within “Cost of sales” in the condensed consolidated statement of operations.

Pro forma results of operations information has not been presented, as the effect of the API Plastics acquisition is not material. The operating results of API Plastics are included within the Company's condensed consolidated statement of operations since the acquisition date of July 10, 2017 and were not material to the Company's results for the three and nine months ended September 30, 2017.

Divestiture of Brazil Business

During the second quarter of 2016, the Company signed a definitive agreement to sell Trinseo do Brasil Comercio de Produtos Quimicos Ltda. (“Trinseo Brazil”), its primary operating entity in Brazil, including both a latex binders and automotive business. The sale closed on October 1, 2016.

As a result of this agreement, during the three and nine months ended September 30, 2016, the Company recorded impairment charges for the estimated loss on sale of approximately $0.3 million, and $13.2 million, respectively, within “Other expense (income), net” in the condensed consolidated statement of operations. The $13.2 million charge was allocated as $8.4 million, $4.2 million, and $0.6 million to the Performance Plastics segment, Latex Binders segment, and Corporate, respectively. During the year ended December 31, 2016, the Company received $1.8 million in proceeds

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from the sale of these businesses, with an additional $1.7 million received during the nine months ended September 30, 2017.

NOTE 14—SEGMENTS

Effective October 1, 2016, the Company realigned its reporting segments to reflect the new model under which the business is managed and results are reviewed by the chief executive officer, who is the Company’s chief operating decision maker. This change in segments was made to provide increased clarity and understanding around the indicators of profitability and cash flow of the Company. The previous Basic Plastics & Feedstocks segment was split into three new segments: Basic Plastics, which includes polystyrene, copolymers, and polycarbonate; Feedstocks, which represents the Company’s styrene monomer business; and Americas Styrenics, which reflects the equity earnings from its 50%-owned styrenics joint venture. In addition, certain highly differentiated acrylonitrile-butadiene-styrene, or ABS, supplied into Performance Plastics markets, which was previously included in the results of Basic Plastics & Feedstocks, is now included in Performance Plastics. Finally, the Latex segment was renamed to Latex Binders. In conjunction with the segment realignment, the Company also changed its primary measure of segment operating performance from EBITDA to Adjusted EBITDA. Refer to the discussion below for further information about Adjusted EBITDA.

The information in the tables below has been retroactively adjusted to reflect the changes in reporting segments and segment operating performance.

The Latex Binders segment produces styrene-butadiene latex, or SB latex, and other latex polymers and binders, primarily for coated paper and packaging board, carpet and artificial turf backings, as well as a number of performance latex binders applications, such as adhesive, building and construction and the technical textile paper market. The Synthetic Rubber segment produces synthetic rubber products used predominantly in high-performance tires, impact modifiers and technical rubber products, such as conveyer belts, hoses, seals and gaskets. The Performance Plastics segment produces highly engineered compounds and blends and some specialized ABS grades for automotive end markets, as well as consumer electronics, medical, electrical and lighting, collectively consumer essential markets, or CEM. The Basic Plastics segment produces styrenic polymers, including polystyrene, basic ABS, and styrene-acrylonitrile, or SAN, products, as well as polycarbonate, or PC, all of which are used as inputs in a variety of end use markets. The Basic Plastics segment also included the results of our previously 50%-owned joint venture, Sumika Styron Polycarbonate, until the Company sold its share in the entity in January 2017 (refer to Note 3 for further information). The Feedstocks segment includes the Company’s production and procurement of styrene monomer outside of North America, which is used as a key raw material in many of the Company’s products, including polystyrene, SB latex, ABS resins, solution styrene-butadiene rubber, or SSBR, etc. Lastly, the Americas Styrenics segment consists solely of the operations of our 50%-owned joint venture, Americas Styrenics, a producer of both styrene monomer and polystyrene in North America.

Asset, capital expenditure, and intersegment sales information is not reviewed or included with the Company’s reporting to the chief operating decision maker. Therefore, the Company has not disclosed this information for each reportable segment.

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	Performance Materials						Basic Plastics & Feedstocks
	Latex		Synthetic		Performance		Basic				Americas		Corporate
Three Months Ended	Binders		Rubber		Plastics		Plastics		Feedstocks		Styrenics		Unallocated		Total
September 30, 2017
Sales to external customers	$	266,260	$	118,684	$	206,999	$	393,622	$	111,017	$	—	$	—	$	1,096,582
Equity in earnings of unconsolidated affiliates		—		—		—		—		—		43,807		—		43,807
Adjusted EBITDA(1)		32,343		(5,579)		29,436		42,062		45,597		43,807
Investment in unconsolidated affiliates		—		—		—		—		—		161,883		—		161,883
Depreciation and amortization		6,046		8,960		4,102		4,274		3,603		—		2,191		29,176
September 30, 2016
Sales to external customers	$	242,600	$	112,690	$	175,355	$	323,729	$	81,036	$	—	$	—	$	935,410
Equity in earnings of unconsolidated affiliates		—		—		—		2,356		—		34,330		—		36,686
Adjusted EBITDA(1)		29,815		28,491		30,187		34,134		12,729		34,330
Investment in unconsolidated affiliates		—		—		—		38,197		—		148,802		—		186,999
Depreciation and amortization		5,742		9,138		1,372		4,057		2,446		—		1,016		23,771

	Performance Materials						Basic Plastics & Feedstocks
	Latex		Synthetic		Performance		Basic				Americas		Corporate
Nine Months Ended	Binders		Rubber		Plastics		Plastics		Feedstocks		Styrenics		Unallocated		Total
September 30, 2017
Sales to external customers	$	846,721	$	456,055	$	581,724	$	1,156,831	$	304,940	$	—	$	—	$	3,346,271
Equity in earnings (losses) of unconsolidated affiliates		—		—		—		810		—		92,219		—		93,029
Adjusted EBITDA(1)		105,228		68,381		79,799		112,691		86,342		92,219
Investment in unconsolidated affiliates		—		—		—		—		—		161,883		—		161,883
Depreciation and amortization		17,469		26,027		8,947		12,094		9,172		—		6,511		80,220
September 30, 2016
Sales to external customers	$	684,552	$	326,278	$	527,875	$	1,029,683	$	230,800	$	—	$	—	$	2,799,188
Equity in earnings (losses) of unconsolidated affiliates		—		—		—		5,375		—		104,939		—		110,314
Adjusted EBITDA(1)		70,042		81,787		103,745		115,050		66,087		104,939
Investment in unconsolidated affiliates		—		—		—		38,197		—		148,802		—		186,999
Depreciation and amortization		17,904		26,073		4,505		11,581		8,071		—		3,610		71,744

(1)The Company’s primary measure of segment operating performance is Adjusted EBITDA, which is defined as income from continuing operations before interest expense, net; provision for income taxes; depreciation and amortization expense; loss on extinguishment of long-term debt; asset impairment charges; gains or losses on the dispositions of businesses and assets; restructuring; acquisition related costs and other items. Adjusted EBITDA is a key metric that is used by management to evaluate business performance in comparison to budgets, forecasts, and prior year financial results, providing a measure that management believes reflects core operating performance by removing the impact of transactions and events that would not be considered a part of core operations. Adjusted EBITDA is useful for analytical purposes; however, it should not be considered an alternative to the Company’s reported GAAP results, as there are limitations in using such financial measures. Other companies in the industry may define Adjusted EBITDA differently than the Company, and as a result, it may be difficult to use Adjusted EBITDA, or similarly named financial measures, that other companies may use to compare the performance of those companies to the Company’s segment performance.

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The reconciliation of income before income taxes to Segment Adjusted EBITDA is as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Income before income taxes	$	41,515	$	83,254	$	267,068	$	306,305
Interest expense, net		18,436		18,832		55,355		56,542
Depreciation and amortization		29,176		23,771		80,220		71,744
Corporate Unallocated(2)		21,864		26,397		70,888		72,766
Adjusted EBITDA Addbacks(3)		76,675		17,432		71,129		34,293
Segment Adjusted EBITDA	$	187,666	$	169,686	$	544,660	$	541,650

(2)Corporate unallocated includes corporate overhead costs and certain other income and expenses.

(3)Adjusted EBITDA addbacks for the three and nine months ended September 30, 2017 and 2016 are as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in millions)	2017		2016		2017		2016
Loss on extinguishment of long-term debt (Note 5)	$	65.3	$	—	$	65.3	$	—
Net loss (gain) on disposition of businesses and assets (Notes 3 and 13)		0.2		0.3		(9.7)		13.2
Restructuring and other charges (Note 15)		1.5		16.8		4.8		18.6
Acquisition transaction and integration costs (Note 13)		3.8		—		4.9		—
Asset impairment charges or write-offs(a)		4.3		—		4.3		—
Other items(b)		1.6		0.3		1.6		2.5
Total Adjusted EBITDA Addbacks	$	76.7	$	17.4	$	71.2	$	34.3

(a) Asset impairment charges for the three and nine months ended September 30, 2017 primarily relate to the impairment of certain long-lived assets in the Company’s Performance Plastics segment.

(b) Other items for the three and nine months ended September 30, 2017 primarily relate to fees incurred in conjunction with the Company’s debt refinancing which was completed during the third quarter of 2017 (refer to Note 5 for further information). Other items for the three and nine months ended September 30, 2016 primarily relate to fees incurred in conjunction with the Company’s secondary offerings completed during these periods.

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NOTE 15—RESTRUCTURING

Refer to the Annual Report for details regarding the Company’s previously announced restructuring activities included in the tables below. New restructuring activities are discussed in greater detail below. Restructuring charges are included within “Selling, general and administrative expenses” in the condensed consolidated statement of operations.

The following table provides detail of the Company’s restructuring charges for the three and nine months ended September 30, 2017 and 2016:

	Three Months Ended				Nine Months Ended				Cumulative
	September 30,				September 30,				Life-to-date
	2017		2016		2017		2016		Charges		Segment
Terneuzen Compounding Restructuring(1)
Asset impairment/accelerated depreciation	$	614	$	—	$	1,745	$	—	$	1,745
Employee termination benefits		170		—		326		—		326
Contract terminations		—		—		590		—		590
Decommissioning and other		192		—		192		—		818
Terneuzen Subtotal	$	976	$	—	$	2,853	$	—	$	3,479	Performance Plastics
Livorno Plant Restructuring(2)
Asset impairment/accelerated depreciation	$	—	$	14,345	$	—	$	14,345	$	14,345
Employee termination benefits		220		1,405		579		1,405		5,211
Contract terminations		—		269		—		269		269
Decommissioning and other		633		64		1,695		64		2,372
Livorno Subtotal	$	853	$	16,083	$	2,274	$	16,083	$	22,197	Latex Binders
Other Restructurings		288		759		1,453		2,989			Various
Total Restructuring Charges	$	2,117	$	16,842	$	6,580	$	19,072

(1) In March 2017, the Company announced plans to upgrade its production capability for compounded resins with the construction of a new state-of-the art compounding facility to replace its existing compounding facility in Terneuzen, The Netherlands. The new facility is expected to start up by the end of 2018, with substantive production at the existing facility expected to cease by December 2018, followed by decommissioning activities in 2019. The Company expects to incur incremental accelerated depreciation charges of approximately $1.9 million through the end of 2018, as well as estimated decommissioning and other charges of approximately $1.2 million throughout 2019, the majority of which are expected to be paid in late 2018 and throughout 2019.

(2) In August 2016, the Company announced its plan to cease manufacturing activities at its latex binders manufacturing facility in Livorno, Italy. The Company expects to incur incremental employee termination benefit charges of $0.2 million throughout 2017, which are expected to be paid in early 2018. The Company also expects to incur additional decommissioning costs associated with this plant shutdown in 2017, the cost of which will be expensed as incurred.

The following table provides a rollforward of the liability balances associated with the Company’s restructuring activities as of September 30, 2017. Employee termination benefit and contract termination charges are recorded within “Accrued expenses and other current liabilities” in the condensed consolidated balance sheet.

	Balance at						Balance at
	December 31, 2016		Expenses		Deductions(1)		September 30, 2017
Employee termination benefits	$	5,021	$	2,492	$	(5,674)	$	1,839
Contract terminations		269		590		(122)		737
Decommissioning and other		—		2,474		(2,474)		—
Total	$	5,290	$	5,556	$	(8,270)	$	2,576

(1) Includes primarily payments made against the existing accrual, as well as immaterial impacts of foreign currency remeasurement.

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NOTE 16—ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The components of AOCI, net of income taxes, consisted of:

	Cumulative		Pension & Other
	Translation		Postretirement Benefit			Cash Flow
Three Months Ended  September 30, 2017 and 2016	Adjustments		Plans, Net			Hedges, Net	Total
Balance as of June 30, 2017	$	(95,747)	$	(61,332)	$	(5,504)	$	(162,583)
Other comprehensive income (loss)		(1,561)		—		(6,387)		(7,948)
Amounts reclassified from AOCI to net income (1)		—		840		2,672		3,512
Balance as of September 30, 2017	$	(97,308)	$	(60,492)	$	(9,219)	$	(167,019)
Balance as of June 30, 2016	$	(106,702)	$	(45,887)	$	4,173	$	(148,416)
Other comprehensive income (loss)		1,488		—		(2,035)		(547)
Amounts reclassified from AOCI to net income (1)		—		533		(245)		288
Balance as of September 30, 2016	$	(105,214)	$	(45,354)	$	1,893	$	(148,675)

	Cumulative		Pension & Other
	Translation		Postretirement Benefit		Cash Flow
Nine Months Ended  September 30, 2017 and 2016	Adjustments		Plans, Net		Hedges, Net		Total
Balance as of December 31, 2016	$	(118,922)	$	(63,504)	$	12,272	$	(170,154)
Other comprehensive income (loss)		21,614		—		(20,703)		911
Amounts reclassified from AOCI to net income (1)		—		3,012		(788)		2,224
Balance as of September 30, 2017	$	(97,308)	$	(60,492)	$	(9,219)	$	(167,019)
Balance as of December 31, 2015	$	(109,120)	$	(46,166)	$	5,569	$	(149,717)
Other comprehensive income (loss)		3,906		(800)		(3,060)		46
Amounts reclassified from AOCI to net income (1)		—		1,612		(616)		996
Balance as of September 30, 2016	$	(105,214)	$	(45,354)	$	1,893	$	(148,675)

(1) The following is a summary of amounts reclassified from AOCI to net income for the three and nine months ended September 30, 2017 and 2016, respectively:

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	Amount Reclassified from AOCI				Amount Reclassified from AOCI
AOCI Components	Three Months Ended  September 30,				Nine Months Ended  September 30,				Statement of Operations
	2017		2016		2017		2016		Classification
Cash flow hedging items
Foreign exchange cash flow hedges	$	2,666	$	(245)	$	(794)	$	(616)	Cost of sales
Interest rate swaps		6		—		6		—	Interest expense, net
Total before tax		2,672		(245)		(788)		(616)
Tax effect		—		—		—		—	Provision for income taxes
Total, net of tax	$	2,672	$	(245)	$	(788)	$	(616)
Amortization of pension and other postretirement benefit plan items
Prior service credit	$	(477)	$	(461)	$	(1,379)	$	(1,382)	(a)
Net actuarial loss		1,697		1,250		4,886		3,770	(a)
Net settlement and curtailment loss		—		—		648		—	(a)
Total before tax		1,220		789		4,155		2,388
Tax effect		(380)		(256)		(1,143)		(776)	Provision for income taxes
Total, net of tax	$	840	$	533	$	3,012	$	1,612

(a) These AOCI components are included in the computation of net periodic benefit costs (see Note 11).

NOTE 17—EARNINGS PER SHARE

Basic earnings per ordinary share (“basic EPS”) is computed by dividing net income available to ordinary shareholders by the weighted average number of the Company’s ordinary shares outstanding for the applicable period. Diluted earnings per ordinary share (“diluted EPS”) is calculated using net income available to ordinary shareholders divided by diluted weighted-average ordinary shares outstanding during each period, which includes unvested RSUs, option awards, and PSUs. Diluted EPS considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential ordinary shares would have an anti-dilutive effect.

The following table presents basic EPS and diluted EPS for the three and nine months ended September 30, 2017 and 2016, respectively.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands, except per share data)	2017		2016		2017		2016
Earnings:
Net income	$	33,215	$	67,254	$	210,668	$	239,805
Shares:
Weighted-average ordinary shares outstanding		43,745		45,865		43,900		47,152
Dilutive effect of RSUs, option awards, and PSUs		1,037		1,096		1,146		889
Diluted weighted-average ordinary shares outstanding		44,782		46,961		45,046		48,041
Income per share:
Income per share—basic	$	0.76	$	1.47	$	4.80	$	5.09
Income per share—diluted	$	0.74	$	1.43	$	4.68	$	4.99

* Refer to Note 12 for discussion of RSUs, option awards, and PSUs granted to certain Company directors and employees. The number of anti-dilutive shares that have been excluded in the computation of diluted earnings per share were 0.2 million for the both the three and nine months ended September 30, 2017, respectively, and zero for both the three and nine months ended September 30, 2016, respectively.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

2017 Year-to-Date Highlights

In the third quarter of 2017, Trinseo recognized net income of $33.2 million and Adjusted EBITDA of $165.8 million. On a year-to-date basis, we recognized net income of $210.7 million and Adjusted EBITDA of $473.8 million. Refer to “Non-GAAP Performance Measures” below for further discussion of our use of non-GAAP measures in evaluating our performance and a reconciliation of these measures. Other highlights for the year are described below.

2017 Debt Refinancing

During the three and nine months ended September 30, 2017, the Company executed a refinancing of its debt, including:

· Issuing $500.0 million aggregate principal amount of 5.375% 2025 Senior Notes;

· Entering the new Senior Credit Facility, which consists of the $375.0 million 2022 Revolving Facility and the $700.0 million 2024 Term Loan B, bearing an interest rate of LIBOR plus 2.50%, subject to a 0.00% LIBOR floor; and

· Using the net proceeds from the above along with available cash to redeem all outstanding indebtedness under its existing 2022 Senior Notes and to repay all outstanding borrowings under its existing 2020 Senior Credit Facility, together with a $53.0 million call premium on the 2022 Senior Notes, accrued and unpaid interest, and fees and other expenses related to the refinancing.

Additionally, on September 1, 2017, the Company entered into certain fixed-for-fixed cross currency swaps (CCS), swapping USD principal and interest payments on the newly issued 2025 Senior Notes for euro-denominated payments. Refer to Note 7 in the condensed consolidated financial statements for further details.

The Company expects the aggregate cash interest savings from the refinancing and CCS to be approximately $25.0 million annually at current LIBO rates.

As a result of the refinancing, the Company recorded a loss on extinguishment of long-term debt of $65.3 million during the three and nine months ended September 30, 2017. Refer to Note 5 in the condensed consolidated financial statements for further information.

Acquisition of API Plastics

On July 10, 2017, the Company completed the acquisition of API Applicazioni Plastiche Industriali S.p.A, or API Plastics,  for a gross purchase price of $90.5 million, inclusive of $8.4 million of cash acquired, yielding a net purchase price of $82.1 million which is subject to certain customary post-closing adjustments. API Plastics, based in Mussolente, Italy, is a  manufacturer of soft-touch polymers and bioplastics, such as thermoplastic elastomers, or TPEs. TPEs can be molded over rigid plastics such as ABS and PC/ABS, which presents opportunities for complementary technology product offerings within our Performance Plastics segment. Refer to Note 13 in the condensed consolidated financial statements for further information.

Sale of Sumika Styron Polycarbonate

On January 31, 2017, the Company completed the sale of its 50% share in Sumika Styron Polycarbonate to Sumitomo Chemical Company Limited for total sales proceeds of approximately $42.1 million. As a result, the Company recorded a gain on sale of $9.3 million during the nine months ended September 30, 2017. In addition, the parties have entered into a long-term agreement to continue sourcing polycarbonate resin from Sumika Styron Polycarbonate to the Company’s Performance Plastics segment.

Share Repurchases and Dividends

In June 2017, the Company’s board of directors authorized an increase to our quarterly dividend, from $0.30 per share to $0.36 per share, a 20% increase. In addition, the board of directors authorized the repurchase of up to two

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million of the Company’s ordinary shares.

During the nine months ended September 30, 2017, under existing authority from its board of directors, the Company purchased 1,038,259 ordinary shares from its shareholders through a combination of open market transactions for an aggregate purchase price of $65.2 million. Additionally, during the nine months ended September 30, 2017, the Company’s board of directors declared quarterly dividends for an aggregate value of $1.02 per ordinary share, or $45.8 million.

Results of Operations

Results of Operations for the Three and Nine Months Ended September 30, 2017 and 2016

The table below sets forth our historical results of operations, and these results as a percentage of net sales for the periods indicated.

References to portfolio adjustments below represent the impacts of the Company’s acquisition and divestiture activity, including the sale of our business in Brazil during 2016, the sale of our joint venture Sumika Styron Polycarbonate during 2017, and the acquisition of API Plastics during 2017. Refer to the condensed consolidated financial statements for further information.

	Three Months Ended								Nine Months Ended
	September 30,								September 30,
(in millions)	2017		%		2016		%		2017		%		2016		%
Net sales	$	1,096.6	100	%	$	935.4	100	%	$	3,346.3	100	%	$	2,799.2	100	%
Cost of sales		949.5	87	%		795.0	85	%		2,876.1	86	%		2,349.4	84	%
Gross profit		147.1	13	%		140.4	15	%		470.2	14	%		449.8	16	%
Selling, general and administrative expenses		65.7	6	%		73.9	8	%		181.6	5	%		180.6	7	%
Equity in earnings of unconsolidated affiliates		43.8	4	%		36.7	4	%		93.0	3	%		110.3	4	%
Operating income		125.2	11	%		103.2	11	%		381.6	12	%		379.5	14	%
Interest expense, net		18.4	2	%		18.8	2	%		55.4	2	%		56.5	2	%
Loss on extinguishment of long-term debt		65.3	6	%		—	—	%		65.3	2	%		—	—	%
Other expense (income), net		—	—	%		1.1	0	%		(6.2)	(0)	%		16.7	1	%
Income before income taxes		41.5	4	%		83.3	9	%		267.1	8	%		306.3	11	%
Provision for income taxes		8.3	1	%		16.0	2	%		56.4	2	%		66.5	2	%
Net income	$	33.2	3	%	$	67.3	7	%	$	210.7	6	%	$	239.8	8	%

Three Months Ended - September 30, 2017 vs. September 30, 2016

Net Sales

Of the 17% increase, 13% was due to higher selling prices primarily from the pass through of higher raw material costs, including higher styrene and butadiene costs to customers across our segments. Additionally, 2% of the increase was due to slightly higher sales volume, as increases in Performance Plastics and Basic Plastics sales volume were mostly offset by decreases in Latex Binders and Synthetic Rubber sales volume. A favorable currency impact increased sales by 3% as the euro strengthened in comparison to the U.S. dollar on a quarter-to-date basis. Offsetting these increases in net sales was a net 1% decrease related to portfolio adjustments.

Cost of Sales

Of the 19% increase, 12% was attributable to higher prices for raw materials, primarily related to styrene monomer and butadiene, and an additional 2% of the increase was due to increased sales volume, primarily in Performance Plastics and Basic Plastics. An unfavorable currency impact increased cost of sales by 4% as the euro strengthened in

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comparison to the U.S. dollar on a quarter-to-date basis. Slightly higher fixed costs resulted in a 1% increase which was mostly offset by a decrease in cost of sales related to portfolio adjustments.

Gross Profit

This increase was primarily due to increased margins per unit sold, primarily within Feedstocks, due to unplanned industry production outages, including the impact of Hurricane Harvey, as well as within Basic Plastics and Latex Binders.

Selling, General and Administrative Expenses

The majority of the $8.2 million decrease is due to a reduction in restructuring charges of $14.7 million, noting $14.3 million in asset impairment charges recorded in the prior year as a result of our decision to cease manufacturing operations at our latex facility in Livorno, Italy. This reduction is partially offset by additional transaction and integration related costs of $2.4 million related to the API Plastics acquisition and $3.6 million of asset impairment charges on certain long-lived assets within the Performance Plastics segment during the third quarter of 2017. Refer to Notes 13 and 15 in the condensed consolidated financial statements for further information.

Equity in Earnings of Unconsolidated Affiliates

Equity earnings increased in 2017, as equity earnings from Americas Styrenics increased from $34.3 million in 2016 to $43.8 million in 2017, primarily due to higher styrene margin which was partially offset by lower polystyrene margin. Additionally, equity earnings from Sumika Styron Polycarbonate decreased from $2.4 million in 2016 to zero in 2017, as the Company completed the sale of its 50% share in the entity to Sumitomo Chemical Company Limited in January 2017, and therefore did not have an ownership interest in the joint venture during the three months ended September 30, 2017. Refer to Note 3 in the condensed consolidated financial statements for further information.

Interest Expense, Net

Interest expense was relatively flat, noting that the Company’s debt refinancing during the third quarter of 2017 did not occur until later in the period, and therefore did not have a significant impact on interest expense for the three months ended September 30, 2017. Refer to Note 5 in the condensed consolidated financial statements for further information.

Loss on Extinguishment of Long-Term Debt

Loss on extinguishment of long-term debt was $65.3 million for the three months ended September 30, 2017, which related to the Company’s debt refinancing during the third quarter of 2017. This amount was comprised of a $53.0 million call premium paid to retire the Company’s 2022 Senior Notes and a $11.5 million write-off of unamortized deferred financing fees related to these notes, as well as the write-off of $0.8 million of unamortized deferred financing fees and unamortized original issue discount related to the termination of the Company’s 2021 Term Loan B.

Other Expense (Income), net

Other income, net for the three months ended September 30, 2017 was less than $0.1 million, which consisted primarily of net foreign exchange transaction gains of approximately $1.7 million offset by other expenses of $1.7 million. Included in the net foreign exchange transaction gains of $1.7 million were foreign exchange transactions gains of $8.2 million, primarily due to the remeasurement of our euro denominated payables due to the relative changes in rates between the U.S. dollar and the euro during the period, partially offset by losses of $6.5 million from our foreign exchange forward contracts. Other expenses of $1.7 million primarily includes $1.2 million of fees incurred in conjunction with the Company’s debt refinancing during the third quarter of 2017.

Other expense, net for the three months ended September 30, 2016 was $1.1 million, which consisted primarily of net foreign exchange transaction losses of approximately $0.4 million, additional impairment charges of $0.3 million for the estimated loss on sale of the Company’s latex and automotive businesses in Brazil, and other expenses. Refer to Note 13 in the condensed consolidated financial statements for further information.Included in the net foreign exchange losses of $0.4 million were foreign exchange transaction losses of $1.5 million, primarily due to the remeasurement of

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our euro denominated payables due to the relative changes in rates between the U.S. dollar and the euro during the period, partially offset by gains of $1.1 million from our foreign exchange forward contracts.

Provision for Income Taxes

Provision for income taxes for the three months ended September 30, 2017 totaled $8.3 million resulting in an effective tax rate of 20.0%. Provision for income taxes for the three months ended September 30, 2016 totaled $16.0 million resulting in an effective tax rate of 19.2%.

The decrease in provision for income taxes was primarily driven by the $41.8 million decrease in income before income taxes,  due predominantly to costs incurred related to the Company’s debt refinancing that occurred during the third quarter of 2017. Refer to Note 5 in the condensed consolidated financial statements for further information.  

Nine Months Ended - September 30, 2017 vs. September 30, 2016

Net Sales

Of the 20% increase, 20% was due to higher selling prices primarily from the pass through of higher raw material costs, including higher styrene and butadiene costs to customers across our segments. Additionally, 1% of the increase was due to slightly higher sales volume, as increases in Performance Plastics and Synthetic Rubber sales volume were partially offset by decreases in Latex Binders and Basic Plastics sales volume. Offsetting these increases in net sales was a net 1% decrease related to portfolio adjustments.

Cost of Sales

Of the 22% increase, 23% was attributable to higher prices for raw materials, primarily related to styrene monomer and butadiene, and an additional 1% of the increase was due to increased sales volume, primarily in Performance Plastics and Synthetic Rubber. Portfolio adjustments resulted in a 1% decrease in cost of sales, which was mostly offset by a slight increase in fixed costs.

Gross Profit

The increase was primarily attributable to higher year-to-date margins per unit sold, especially within the Latex Binders and Feedstocks segments, due to more favorable market conditions. Higher sales volume in Synthetic Rubber and Performance Plastics was partially offset by lower sales volume in Basic Plastics and Latex Binders, as well as margin compression in Performance Plastics due to higher raw material costs.

Selling, General and Administrative Expenses

The $1.0 million year-over-year increase is comprised of several offsetting factors. Restructuring expenses decreased by $12.5 million, noting $16.1 million in asset impairment and other charges recorded in the prior year as a result of our decision to cease manufacturing operations at our latex facility in Livorno, Italy, partially offset by $2.9 million in charges in the current year related to the upgrade and replacement of the Company’s compounding facility in Terneuzen, The Netherlands. Offsetting the decrease in restructuring expenses were increased costs incurred supporting growth initiatives of approximately $4.0 million, transaction and integration related costs of $3.5 million related to the API Plastics acquisition, and $3.6 million of asset impairment charges on certain long-lived assets within the Performance Plastics segment. Refer to Notes 13 and 15 in the condensed consolidated financial statements for further information.

Equity in Earnings of Unconsolidated Affiliates

Equity earnings decreased in 2017, as equity earnings from Americas Styrenics decreased from $104.9 million in 2016 to $92.2 million in 2017, primarily due to the planned and extended first quarter styrene outage at its St. James, LA facility, including lower margins on second quarter sales of styrene purchased during the outage. Additionally, equity earnings from Sumika Styron Polycarbonate decreased from $5.4 million in 2016 to $0.8 million in 2017, as the Company completed the sale of its 50% share in the entity to Sumitomo Chemical Company Limited in January 2017,

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and therefore did not have an ownership interest in the joint venture for the majority of the nine months ended September 30, 2017. Refer to Note 3 in the condensed consolidated financial statements for further information.

Interest Expense, Net

This slight decrease was primarily attributable to lower deferred financing fee amortization recorded into interest expense from our Accounts Receivable Securitization Facility. As the Company’s debt refinancing during the third quarter of 2017 did not occur until later in the period, there was no significant impact on interest expense for the nine months ended September 30, 2017. Refer to Note 5 in the condensed consolidated financial statements for further information.

Loss on Extinguishment of Long-Term Debt

Loss on extinguishment of long-term debt was $65.3 million for the nine months ended September 30, 2017, which related to the Company’s debt refinancing during the third quarter of 2017. This amount was comprised of a $53.0 million call premium paid to retire the Company’s 2022 Senior Notes and a $11.5 million write-off of unamortized deferred financing fees related to these notes, as well as the write-off of $0.8 million of unamortized deferred financing fees and unamortized original issue discount related to the termination of the Company’s 2021 Term Loan B.

Other Expense (Income), net

Other income, net for the nine months ended September 30, 2017 was $6.2 million, which primarily includes a $9.3 million gain related to the sale of the Company’s 50% share in Sumika Styron Polycarbonate in January 2017 (refer to Note 3 in the condensed consolidated financial statements for further information). Additionally, net foreign exchange transaction losses for the period were $0.9 million, which included $16.1 million of foreign exchange transaction gains primarily due to the remeasurement of our euro denominated payables due to the relative changes in rates between the U.S. dollar and the euro during the period, more than offset by $17.0 million of losses from our foreign exchange forward contracts. Additionally, other expenses included $1.2 million of fees incurred in conjunction with the Company’s debt refinancing during the third quarter of 2017.

Other expense, net for the nine months ended September 30, 2016 was $16.7 million, which includes an impairment charge for the estimated loss on sale of our latex and automotive businesses in Brazil of approximately $13.2 million. Refer to Note 13 in the condensed consolidated financial statements for further information. Adding to these losses were net foreign exchange transaction losses of $2.0 million. Included in these net losses of $2.0 million were foreign exchange transactions losses of $4.1 million, primarily due to the remeasurement of our euro denominated payables due to the relative changes in rates between the U.S. dollar and the euro during the period, partially offset by gains of $2.1 million from our foreign exchange forward contracts.

Provision for Income Taxes

Provision for income taxes for the nine months ended September 30, 2017 totaled $56.4 million resulting in an effective tax rate of 21.1%. Provision for income taxes for the nine months ended September 30, 2016 totaled $66.5 million resulting in an effective tax rate of 21.7%.

The decrease in provision for income taxes was primarily driven by the $39.2 million decrease in income before income taxes, due predominantly to costs incurred related to the Company’s debt refinancing that occurred during the third quarter of 2017. Refer to Note 5 in the condensed consolidated financial statements for further information.

Outlook

Overall, we expect continued strong fundamental business performance through the remainder of 2017. European styrene monomer margin over raw materials is forecast to decline in the fourth quarter from third quarter levels by approximately $110 per ton, on average, as offline capacity begins to come back online. Additionally, in the fourth quarter, the Company will open a new SSBR pilot plant in Germany. This incremental capacity will allow for more

36

efficient use of our production facilities and help speed up innovation in the performance tires market and will also deliver sufficient quantities of new SSBR formulations required for real-life tire testing.

Profitability should be higher in 2018 due mainly to Performance Materials growth initiatives and continued, strong supply and demand dynamics in Basic Plastics & Feedstocks.

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Selected Segment Information

Effective October 1, 2016, the Company realigned its reporting segments to reflect the new model under which the business is now managed and results are reviewed by the chief executive officer, who is the Company’s chief operating decision maker. The Company’s reportable segments are now as follows: Latex Binders, Synthetic Rubber, Performance Plastics, Basic Plastics, Feedstocks, and Americas Styrenics. In conjunction with this segment realignment, the Company changed its primary measure of segment operating performance to Adjusted EBITDA. Refer to the Annual Report for a description of our segments, including a detailed overview, products and end uses, and competition and customers.

The following sections describe net sales, Adjusted EBITDA, and Adjusted EBITDA margin by segment for the three and nine months ended September 30, 2017 and 2016, which have been recast to reflect the above changes. Inter-segment sales have been eliminated. Refer to Note 14 in the condensed consolidated financial statements for further information on these changes, as well as for a detailed definition of Adjusted EBITDA and a reconciliation of income before income taxes to segment Adjusted EBITDA. 

References to portfolio adjustments below represent the impacts of the Company’s acquisition and divestiture activity, including the sale of our business in Brazil during 2016, the sale of our joint venture Sumika Styron Polycarbonate during 2017, and the acquisition of API Plastics during 2017. Refer to the condensed consolidated financial statements for further information.

Latex Binders Segment

Our Latex Binders segment produces SB latex and other latex polymers and binders primarily for coated paper and packaging board, carpet and artificial turf backings, as well as a number of performance latex applications,such as adhesive, building and construction and the technical textile paper market.

	Three Months Ended								Nine Months Ended
	September 30,								September 30,
(in millions)	2017			2016			% Change		2017			2016			% Change
Net sales	$	266.3		$	242.6		10	%	$	846.7		$	684.6		24	%
Adjusted EBITDA	$	32.3		$	29.8		8	%	$	105.2		$	70.0		50	%
Adjusted EBITDA margin		12	%		12	%				12	%		10	%

Three Months Ended - September 30, 2017 vs. September 30, 2016

Net sales increased 10% from the prior year, due mostly to higher selling prices, which resulted in a 15% increase. These higher selling prices were primarily due to the pass through of higher butadiene and styrene costs to our customers. Offsetting this increase was a 4% decrease due to lower sales volume to the North America paper and carpet markets, as well as an additional 4% decrease due to portfolio adjustments. A favorable currency impact increased net sales by 2% as the euro strengthened in comparison to the U.S. dollar on a quarter-to-date basis.

The increase in Adjusted EBITDA of 8% was due to margin improvements of $9.8 million, a 33% increase, primarily due to better market conditions in Asia, partially offset by lower sales volume, which resulted in a 12% decrease. Increased fixed costs resulted in a 9% decrease in Adjusted EBITDA, while portfolio adjustments resulted in an additional 4% decrease in Adjusted EBITDA.

Nine Months Ended - September 30, 2017 vs. September 30, 2016 

Of the 24% increase in net sales, 29% was due to higher selling prices, primarily due to the pass through of higher butadiene and styrene costs to our customers. Offsetting this increase was a 4% decrease due to portfolio adjustments and a 1% decrease in sales volume.

Adjusted EBITDA increased by $35.2 million, or 50%, year-over-year primarily due to margin improvements of $44.3 million, or 63%, particularly in Asia, resulting from favorable market conditions. Partially offsetting these margin improvements was a 7% decrease due to lower sales volume, primarily within the North America and European paper and carpet markets, and a 3% decrease due to increased fixed costs. Portfolio adjustments resulted in a 4% decrease to Adjusted EBITDA.

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Synthetic Rubber Segment

Our Synthetic Rubber segment produces styrene-butadiene and polybutadiene-based rubber products used predominantly in high-performance tires, impact modifiers and technical rubber products, such as conveyor belts, hoses, seals and gaskets. We have a broad synthetic rubber technology and product portfolio, focusing on specialty products, such as SSBR, lithium polybutadiene rubber, or Li-PBR, nickel polybutadiene rubber, or Ni-PBR, and neodymium polybutadiene rubber, or Nd-PBR, while also producing core products, such as emulsion styrene-butadiene rubber, or ESBR.

	Three Months Ended								Nine Months Ended
	September 30,								September 30,
(in millions)	2017			2016			% Change		2017			2016			% Change
Net sales	$	118.7		$	112.7		5	%	$	456.1		$	326.3		40	%
Adjusted EBITDA	$	(5.6)		$	28.5		(120)	%	$	68.4		$	81.8		(16)	%
Adjusted EBITDA margin		(5)	%		25	%				15	%		25	%

Three Months Ended - September 30, 2017 vs. September 30, 2016

Net sales increased 5% from the prior year, with higher selling prices contributing to 9% of the increase, primarily resulting from the pass through of higher butadiene and styrene costs to customers. A favorable currency impact increased net sales by 5% as the euro strengthened in comparison to the U.S. dollar on a quarter-to-date basis. Offsetting these increases was an 8% decrease due to lower sales volume, primarily from customer destocking in SSBR.

The majority of the overall $34.1 million decrease in Adjusted EBITDA was due to unfavorable raw material timing, due to rapidly declining butadiene prices, which led to a $23.9 million decrease related to margin as higher cost raw materials purchased in previous periods were reflected in our cost of goods sold during the third quarter. Additionally, lower sales volume, primarily from customer destocking in SSBR, contributed to a $7.2 million decrease.

Nine Months Ended - September 30, 2017 vs. September 30, 2016

Net sales increased 40% from the prior year, with higher selling prices contributing to 34% of the increase, primarily resulting from the pass through of higher butadiene and styrene costs to customers. Additionally, 6% of the increase was due to higher sales volume which was a result of higher customer demand for SSBR and ESBR, as well as higher sales of Ni-PBR, noting decreased production in the prior year to allow for Nd-PBR trials.

The majority of the overall $13.4 million decrease in Adjusted EBITDA was primarily due to unfavorable raw material timing resulting from declining butadiene prices during the period, net of favorable price lag, which resulted in a 14% decrease due to lower margins. Higher fixed costs, primarily from growth initiatives, resulted in a 9% decrease in Adjusted EBITDA. These decreases were partially offset by higher sales volume primarily related to higher demand for SSBR, ESBR, and Ni-PBR, which resulted in a 6% increase in Adjusted EBITDA.

Performance Plastics Segment

Our Performance Plastics segment consists of compounds and blends and some specialized ABS grades. We are a producer of highly engineered compounds and blends for automotive end markets, as well as consumer electronics, medical, electrical and lighting, collectively referred to as consumer essential markets. In July 2017, the Company completed the acquisition of API Plastics, the results of which are reported within the Performance Plastics segment. Refer to Note 13 in the condensed consolidated financial statements for further information.

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	Three Months Ended								Nine Months Ended
	September 30,								September 30,
(in millions)	2017			2016			% Change		2017			2016			% Change
Net sales	$	207.0		$	175.4		18	%	$	581.7		$	527.9		10	%
Adjusted EBITDA	$	29.4		$	30.2		(3)	%	$	79.8		$	103.7		(23)	%
Adjusted EBITDA margin		14	%		17	%				14	%		20	%

Three Months Ended - September 30, 2017 vs. September 30, 2016

Of the 18% increase in net sales, 7% was due to higher selling prices due to the pass through of higher raw material costs to our customers, as well as a 7% increase due to increased sales volume as a result of higher volumes sold to the automotive market in North America and the consumer electronics market in Asia. A favorable currency impact increased net sales by 3% as the euro strengthened in comparison to the U.S. dollar on a quarter-to-date basis with an additional 1% increase due to portfolio adjustments.

The slight decrease in Adjusted EBITDA was due to several offsetting factors. A 14% increase in Adjusted EBITDA was due to increased sales volume to the automotive market in North America and the consumer electronics market in Asia, with an additional 2% net increase due to portfolio adjustments. Offsetting these increases was a 12% decrease due to margin compression from increased costs of raw materials, such as polycarbonate, not all of which were able to be passed through to our customers. Additionally, an inventory build during 2016 resulted in increased fixed cost absorption in the prior year, contributing to an overall 8% decrease in Adjusted EBITDA in the current year related to fixed costs.

Nine Months Ended - September 30, 2017 vs. September 30, 2016

Of the 10% increase in net sales, 5% was due to higher selling prices due to the pass through of higher raw material costs to our customers, as well as an 8% increase due to increased sales volume, primarily related to higher sales to the automotive markets in Europe and North America and the consumer electronics market in Asia. Portfolio adjustments resulted in a 2% decrease in net sales.

The overall decrease in Adjusted EBITDA of $23.9 million was the result of several factors. Unfavorable raw material timing led to lower margins for the period. In addition, the Company experienced margin compression from increased costs of raw materials, not all of which were able to be passed through to our customers. These two factors contributed to a combined 33% decrease in Adjusted EBITDA compared to the prior year. Additionally, increased fixed costs contributed to a 6% decrease in Adjusted EBITDA. Partially offsetting these decreases was a 13% increase due to increased sales volume growth to the automotive markets in Europe and North America and a 3% increase due to portfolio adjustments.

Basic Plastics Segment

The Basic Plastics segment produces styrenic polymers, including polystyrene, basic ABS, and SAN products, as well as PC, all of which are used as inputs in a variety of end use markets. The Basic Plastics segment also included the results of our previously 50%-owned joint venture Sumika Styron Polycarbonate prior to its sale in January 2017. Refer to Note 3 in the condensed consolidated financial statements for further information.

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	Three Months Ended								Nine Months Ended
	September 30,								September 30,
(in millions)	2017			2016			% Change		2017			2016			% Change
Net sales	$	393.6		$	323.7		22	%	$	1,156.9		$	1,029.6		12	%
Adjusted EBITDA	$	42.1		$	34.2		23	%	$	112.7		$	115.1		(2)	%
Adjusted EBITDA margin		11	%		11	%				10	%		11	%

Three Months Ended - September 30, 2017 vs. September 30, 2016

Of the 22% increase in net sales, 10% was due to higher selling prices due to the pass through of higher styrene costs to customers and 7% was due to higher polystyrene and copolymer sales volume. Additionally, a favorable currency impact increased net sales by 4% as the euro strengthened in comparison to the U.S. dollar on a quarter-to-date basis.

Adjusted EBITDA increased 23%, or $7.9 million, of which 21% was due to higher margins, particularly in polycarbonate due to very tight market conditions. An additional 13% increase was due to higher sales volume, particularly in copolymers. Partially offsetting these increases was a 6% decrease due to increased fixed costs, which includes start-up costs incurred related to our new ABS capacity in Asia, and a 7% decrease due to portfolio adjustments, which included the impact of the sale of Sumika Styron Polycarbonate during the first quarter of 2017.

Nine Months Ended - September 30, 2017 vs. September 30, 2016

Of the 12% increase in net sales, 16% was due to higher selling prices due to the pass through of increased raw material costs to customers, primarily styrene. This increase was partially offset by a 3% decrease due to lower sales volume, primarily related to lower polystyrene sales in Asia, as we have increased our focus on higher margin business.

The slight decrease in Adjusted EBITDA was partly due to several offsetting factors. Firstly, an 11% increase in Adjusted EBITDA was due to higher year-to-date margins, primarily within ABS and polycarbonate. However, this increase was offset by lower sales volume, which resulted in a decrease of 4%, primarily related to Europe and Asia polystyrene sales, with competitor supply outages in Europe in the prior year and with an increased focus on higher margins in Asia. Higher fixed costs, including start-up costs incurred related to our new ABS capacity in Asia, contributed to an additional decrease of 4%. Portfolio adjustments resulted in a 4% decrease in Adjusted EBITDA, due to the sale of Sumika Styron Polycarbonate during the first quarter of 2017.

Feedstocks Segment

The Feedstocks segment includes the Company’s production and procurement of styrene monomer outside of North America, which is used as a key raw material in many of the Company’s products, including polystyrene, SB latex, ABS resins, SSBR, etc.

	Three Months Ended								Nine Months Ended
	September 30,								September 30,
(in millions)	2017			2016			% Change		2017			2016			% Change
Net sales	$	111.0		$	81.0		37	%	$	304.9		$	230.8		32	%
Adjusted EBITDA	$	45.6		$	12.7		259	%	$	86.3		$	66.1		31	%
Adjusted EBITDA margin		41	%		16	%				28	%		29	%

Three Months Ended - September 30, 2017 vs. September 30, 2016

The 37% increase in net sales was almost entirely due to the pass through of higher styrene prices, which contributed to 33% of the increase. A favorable currency impact increased net sales by 4% as the euro strengthened in comparison to the U.S. dollar on a quarter-to-date basis.

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The increase in Adjusted EBITDA was primarily due to higher styrene margin due to unplanned industry production outages, including the impact of Hurricane Harvey, which resulted in a $33.1 million increase in Adjusted EBITDA, slightly offset by a $1.4 million decrease due to higher maintenance-related fixed costs.

Nine Months Ended - September 30, 2017 vs. September 30, 2016

The 32% increase in net sales was almost entirely due to the pass through of higher styrene prices, which contributed to 30% of the increase. Higher styrene-related sales volume also resulted in a 3% increase in net sales.

The increase in Adjusted EBITDA was primarily due to higher margins as a result of favorable market conditions, which resulted in a 38% increase in Adjusted EBITDA, slightly offset by a 7% decrease due to higher maintenance-related fixed costs.

Americas Styrenics Segment

The Americas Styrenics segment consists solely of the operations of our 50%-owned joint venture, Americas Styrenics, a producer of both styrene monomer and polystyrene in North America. Styrene monomer is a basic building block of plastics and a key input to many of the Company’s products, as well as a key raw material for the production of polystyrene. Major applications for the polystyrene products Americas Styrenics produces include appliances, food packaging, food service disposables, consumer electronics and building and construction materials.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(in millions)	2017		2016		% Change		2017		2016		% Change
Adjusted EBITDA*	$	43.8	$	34.3	28	%	$	92.2	$	104.9	(12)	%

*The results of this segment are comprised entirely of earnings from Americas Styrenics, our equity method investment. As such, Adjusted EBITDA related to this segment is included within “Equity in earnings of unconsolidated affiliates” in the consolidated statements of operations.

Three Months Ended - September 30, 2017 vs. September 30, 2016

The increase in Adjusted EBITDA was primarily due to higher styrene sales volume, including impacts from a stronger export market, as well as higher styrene margin as a result of unplanned industry supply outages, including the impact of Hurricane Harvey, which was offset by lower polystyrene margin.

Nine Months Ended – September 30, 2017 vs. September 30, 2016

The decrease in Adjusted EBITDA was primarily due to the planned first quarter styrene outage at the Americas Styrenics St. James, LA facility, which was extended in order to complete repairs on critical equipment. The facility came back online at full production in early April 2017. As a result of this extended outage, the Company incurred an unfavorable impact of approximately $23 million to Adjusted EBITDA.

Non-GAAP Performance Measures

We present Adjusted EBITDA as a non-GAAP financial performance measure, which we define as income from continuing operations before interest expense, net; provision for income taxes; depreciation and amortization expense; loss on extinguishment of long-term debt; asset impairment charges; gains or losses on the dispositions of businesses and assets; restructuring; acquisition related costs and other items. In doing so, we are providing management, investors, and credit rating agencies with an indicator of our ongoing performance and business trends, by removing the impact of transactions and events that we would not consider a part of our core operations.

There are limitations to using the financial performance measures such as Adjusted EBITDA. This performance measure is not intended to represent net income or other measures of financial performance. As such, it should not be used as an alternative to net income as an indicator of operating performance. Other companies in our industry may define Adjusted EBITDA differently than we do. As a result, it may be difficult to use this or similarly-named financial measures that other companies may use, to compare the performance of those companies to our performance. We

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compensate for these limitations by providing a reconciliation of this performance measure to our net income, which is determined in accordance with GAAP.

Adjusted EBITDA is calculated as follows for the three and nine months ended September 30, 2017 and 2016, respectively:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in millions)	2017		2016		2017		2016
Net income	$	33.2	$	67.3	$	210.7	$	239.8
Interest expense, net		18.4		18.8		55.4		56.5
Provision for income taxes		8.3		16.0		56.4		66.5
Depreciation and amortization		29.2		23.8		80.1		71.8
EBITDA(a)	$	89.1	$	125.9	$	402.6	$	434.6
Loss on extinguishment of long-term debt		65.3		—		65.3		—
Net loss (gain) on disposition of businesses and assets(b)		0.2		0.3		(9.7)		13.2
Restructuring and other charges(c)		1.5		16.8		4.8		18.6
Acquisition transaction and integration costs(d)		3.8		—		4.9		—
Asset impairment charges or write-offs(e)		4.3		—		4.3		—
Other items(f)		1.6		0.3		1.6		2.5
Adjusted EBITDA	$	165.8	$	143.3	$	473.8	$	468.9

(a) EBITDA is a non-GAAP financial performance measure that we refer to in making operating decisions because we believe it provides our management as well as our investors and credit agencies with meaningful information regarding the Company’s operational performance. We believe the use of EBITDA as a metric assists our board of directors, management and investors in comparing our operating performance on a consistent basis. Other companies in our industry may define EBITDA differently than we do. As a result, it may be difficult to use EBITDA, or similarly-named financial measures that other companies may use, to compare the performance of those companies to our performance. We compensate for these limitations by providing reconciliations of our EBITDA results to our net income, which is determined in accordance with GAAP.

(b) Net gain on disposition of businesses and assets during the nine months ended September 30, 2017 relates primarily to the sale of our 50% share in Sumika Styron Polycarbonate to Sumitomo Chemical Company Limited, for which the Company recorded a gain on sale of $9.3 million during the period. Refer to Note 3 in the condensed consolidated financial statements for further information. During the nine months ended September 30, 2016, the Company recorded an impairment charge for the estimated loss on sale of our primary operating entity in Brazil, which includes both latex and automotive businesses, of approximately $13.2 million. Refer to Note 13 in the condensed consolidated financial statements for further information.

(c) Restructuring and other charges for the three and nine months ended September 30, 2017 primarily relate to employee termination benefit and decommissioning charges incurred in connection with the decision to cease manufacturing activities at our latex binders manufacturing facility in Livorno, Italy, as well as employee termination benefit charges and contract termination charges related to the upgrade and replacement of the Company’s compounding facility in Terneuzen, The Netherlands. Refer to Note 15 in the condensed consolidated financial statements for further information. Restructuring and other charges for the three and nine months ended September 30, 2016 relate primarily to $16.1 million in charges incurred in connection with the Livorno, Italy action noted above, consisting of an impairment charge for unrecoverable net book value of property, plant, and equipment and other assets, as well as employee and contract termination charges. The remaining restructuring charges for the three and nine months ended September 30, 2016 relate to employee termination benefit and decommissioning charges incurred in connection with the Allyn’s Point shutdown within our latex binders business, as well as employee termination benefit charges related to the elimination of certain corporate functions as a result of the sale of our latex and automotive businesses in Brazil.

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Note that the accelerated depreciation charges incurred as part of both the upgrade and replacement of the Company’s compounding facility in Terneuzen, The Netherlands as well as the Allyn’s Point shutdown are included within the “Depreciation and amortization” caption above, and therefore are not included as a separate adjustment within this caption.

(d) Acquisition transaction and integration costs for the three and nine months ended September 30, 2017 relate to advisory and professional fees and a non-cash fair value inventory adjustment incurred in conjunction with the Company’s acquisition of API Plastics, which closed in July 2017. Refer to Note 13 in the condensed consolidated financial statements for further information.

(e) Asset impairment charges for the three and nine months ended September 30, 2017 relate to the impairment of certain long-lived assets within the Company’s Performance Plastics segment.

(f) Other items for the three and nine months ended September 30, 2017 primarily relate to fees incurred in conjunction with the Company’s debt refinancing which was completed during the third quarter of 2017. Other items for the three and nine months ended September 30, 2016 primarily relate to fees incurred in conjunction with the Company’s secondary offerings completed during these periods.

Liquidity and Capital Resources

Cash Flows

The table below summarizes our primary sources and uses of cash for the nine months ended September 30, 2017 and 2016, respectively. We have derived the summarized cash flow information from our unaudited financial statements.

	Nine Months Ended
	September 30,
(in millions)	2017		2016
Net cash provided by (used in):
Operating activities	$	194.8	$	324.7
Investing activities		(141.5)		(77.7)
Financing activities		(210.2)		(211.7)
Effect of exchange rates on cash		10.5		(0.3)
Net change in cash and cash equivalents	$	(146.4)	$	35.0

Operating Activities

Net cash provided by operating activities during the nine months ended September 30, 2017 totaled $194.8 million, inclusive of $80.0 million in dividends from Americas Styrenics, as well as dividends from Sumika Styron Polycarbonate, $8.9 million of which were classified as operating activities, with the remaining $0.9 million classified as investing activities. Refer to Note 3 in the condensed consolidated financial statements for further information. Net cash used in operating assets and liabilities for the nine months ended September 30, 2017 totaled $160.3 million, due primarily to increases in accounts receivable of $92.8 million and inventories of $57.3 million, respectively. The increases in accounts receivable and inventories were primarily due to increased raw material prices.

Net cash provided by operating activities during the nine months ended September 30, 2016 totaled $324.7 million, due primarily to earnings for the period. Also impacting cash flows from operating activities for the period was $100.0 million in dividends from Americas Styrenics. Net cash used in operating assets and liabilities for the nine months ended September 30, 2016 totaled $38.0 million, due primarily to increases in accounts receivable of $30.2 million and inventories of $27.6 million, respectively,  offset by an increase in accounts payable and other current liabilities of $23.1 million. The increase in accounts receivable was primarily due to higher net sales during the third quarter of 2016, compared to the fourth quarter of 2015, due primarily to increasing raw material prices as well as volume increases.  The increase in inventory was primarily due to increasing raw material prices,  and the increase in accounts payable and other current liabilities is primarily due to timing of payments, as well as increases in prices for raw materials purchases.

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Investing Activities

Net cash used in investing activities for the nine months ended September 30, 2017 totaled $141.5 million, resulting from capital expenditures of $108.9 million and cash paid to acquire API Plastics of $79.7 million during the period, net of cash acquired (refer to Note 13 in the condensed consolidated financial statements for further information). Offsetting these uses of cash were primarily proceeds received of $42.1 million from the sale of the Company’s 50% share in Sumika Styron Polycarbonate to Sumitomo Chemical Company Limited.

Net cash used in investing activities for the nine months ended September 30, 2016 totaled $77.7 million, primarily from capital expenditures of $82.7 million during the period, a significant portion of which related to our project to upgrade our legacy ERP environment to the latest version of SAP.  Partially offsetting these capital expenditures were dividends received from Sumika Styron Polycarbonate during the period, $4.8 million of which were classified as investing activities on the condensed consolidated statement of cash flows, with the remaining $1.4 million classified as operating activities.

Financing Activities

Net cash used in financing activities during the nine months ended September 30, 2017 totaled $210.2 million. The most significant activity during the period related to the third quarter debt refinancing, which included net proceeds of $1,200.0 million from the issuance of our 2024 Term Loan B and our 2025 Senior Notes, offset by the retirement of our existing 2021 Term Loan B and 2022 Senior Notes totaling $1,238.5 million and deferred financing fees paid in conjunction with the refinancing of $19.2 million. As a result of the redemption of the 2022 Senior Notes, the Company paid a call premium of $53.0 million during the period. Additionally, the Company paid $65.2 million related to the repurchase of ordinary shares and also paid $42.2 million of dividends. Partially offsetting these uses of cash was $8.3 million of proceeds received from the exercise of option awards.

Net cash used in financing activities during the nine months ended September 30, 2016 totaled $211.7 million. This activity was primarily due to  $194.1 million of payments related to the repurchase of ordinary shares during the period and $13.9 million of dividends paid, as well as $3.8 million of principal payments related to our 2021 Term Loan B.

Free Cash Flow

We use Free Cash Flow as a non-GAAP measure to evaluate and discuss the Company’s liquidity position and results. Free Cash Flow is defined as cash from operating activities, less capital expenditures. We believe that Free Cash Flow provides an indicator of the Company’s ongoing ability to generate cash through core operations, as it excludes the cash impacts of various financing transactions as well as cash flows from business combinations that are not considered organic in nature. We also believe that Free Cash Flow provides management and investors with a useful analytical indicator of our ability to service our indebtedness, pay dividends (when declared), and meet our ongoing cash obligations.

Free Cash Flow is not intended to represent cash flows from operations as defined by GAAP, and therefore, should not be used as an alternative for that measure. Other companies in our industry may define Free Cash Flow differently than we do. As a result, it may be difficult to use this or similarly-named financial measures that other companies may use, to compare the liquidity and cash generation of those companies to our own. We compensate for these limitations by providing a reconciliation to cash provided by operating activities, which is determined in accordance with GAAP.

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	Nine Months Ended
	September 30,
(in millions)	2017		2016
Cash provided by operating activities	$	194.8	$	324.7
Capital expenditures		(108.9)		(82.7)
Free Cash Flow	$	85.9	$	242.0

Refer to the discussion above for significant impacts to cash provided by operating activities for the nine months ended September 30, 2017 and 2016, respectively.

Capital Resources and Liquidity

We require cash principally for day-to-day operations, to finance capital investments and other initiatives, to purchase materials, to service our outstanding indebtedness, and to fund dividend payments to our shareholders. Our sources of liquidity include cash on hand, cash flow from operations, and amounts available under the Senior Credit Facility and the Accounts Receivable Securitization Facility.

As of September 30, 2017 and December 31, 2016, we had $1,201.5 million and $1,187.4 million, respectively, in outstanding indebtedness and $949.8 million and $890.7 million, respectively, in working capital. In addition, as of September 30, 2017 and December 31, 2016, we had $106.9 million and $88.8 million of foreign cash and cash equivalents on our balance sheet, respectively, all of which is readily convertible into other foreign currencies, including the U.S. dollar. Our intention is not to permanently reinvest our foreign cash and cash equivalents. Accordingly, we record deferred income tax liabilities related to the unremitted earnings of our subsidiaries.

As noted in Note 5 of the condensed consolidated financial statements, the Company completed a debt refinancing during the third quarter of 2017, the results of which are reflected in the table below. For definitions of capitalized terms not included herein, refer to the Annual Report.  

The following table outlines our outstanding indebtedness as of September 30, 2017 and December 31, 2016 and the associated interest expense, including amortization of deferred financing fees. Effective interest rates for the borrowings included in the table below are for the nine months ended September 30, 2017 and the year ended December 31, 2016. Note that the effective interest rates below exclude the impact of deferred financing fee amortization.

	As of and for the Nine Months Ended						As of and for the Year Ended
	September 30, 2017						December 31, 2016
			Effective						Effective
			Interest		Interest				Interest		Interest
(dollars in millions)	Balance		Rate		Expense		Balance		Rate		Expense
Senior Credit Facility
2024 Term Loan B	$	700.0	3.7	%	$	2.0	$	—	—		$	—
2022 Revolving Facility		—	—			0.2		—	—			—
2020 Senior Credit Facility
2021 Term Loan B		—	4.3	%		15.9		491.5	4.3	%		23.3
2020 Revolving Facility		—	—			2.3		—	—			3.3
2025 Senior Notes		500.0	5.4	%		2.6		—	—			—
2022 Senior Notes
USD Notes		—	6.8	%		14.4		300.0	6.8	%		21.1
Euro Notes		—	6.4	%		18.8		394.3	6.4	%		27.4
Accounts Receivable Securitization Facility		—	—			2.2		—	—			3.3
Other indebtedness		1.5	4.8	%		0.1		1.6	4.8	%		0.1
Total	$	1,201.5			$	58.5	$	1,187.4			$	78.5

Our Senior Credit Facility includes the 2022 Revolving Facility, which matures in September 2022, and has a

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borrowing capacity of $375.0 million. As of September 30, 2017, the Company had no outstanding borrowings, and had $357.2 million (net of $17.8 million outstanding letters of credit) of funds available for borrowing under the 2022 Revolving Facility.  Further, as of September 30, 2017, the Borrowers are required to pay a quarterly commitment fee in respect of any unused commitments under the 2022 Revolving Facility equal to 0.375% per annum.

We also continue to maintain our Accounts Receivable Securitization Facility set to mature in May 2019, under which our borrowing capacity is $200.0 million. As of September 30, 2017, there were no amounts outstanding under the Accounts Receivable Securitization Facility, with approximately $148.8 million of funds available for borrowing under this facility, based on the pool of eligible accounts receivable.

Our other borrowing arrangements include our $700.0 million 2024 Term Loan B (maturing in September 2024), which requires scheduled quarterly payments in amounts equal to 0.25% of the original principal, and our 2025 Senior Notes (maturing in September 2025), which totaled $500.0 million as of September 30, 2017.

The Senior Credit Facility and Indenture contain certain customary affirmative, negative and financial covenants. As of September 30, 2017, the Company was in compliance with all of these debt covenant requirements. Refer to Note 5 of the condensed consolidated financial statements for further information on the details of these covenant requirements.

Our ability to raise additional financing and our borrowing costs may be impacted by short- and long-term debt ratings assigned by independent rating agencies, which are based, in significant part, on our performance as measured by certain credit metrics such as interest coverage and leverage ratios.

We and our subsidiaries, affiliates or significant shareholders may from time to time seek to retire or purchase our outstanding debt through cash purchases in the open market, privately negotiated transactions, exchange transactions or otherwise. Such repurchases or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions and other factors. The amounts involved may be material.

Trinseo Materials Operating S.C.A. and Trinseo Materials Finance, Inc. (the “Issuers” of our 2025 Senior Notes and “Borrowers” under our Senior Credit Facility) are dependent upon the cash generation and receipt of distributions and dividends or other payments from our subsidiaries and joint venture in order to satisfy their debt obligations. There are no known significant restrictions by third parties on the ability of subsidiaries of the Company to disburse or dividend funds to the Issuers and the Borrowers in order to satisfy these obligations. However, as the Company’s subsidiaries are located in a variety of jurisdictions, the Company can give no assurances that its subsidiaries will not face transfer restrictions in the future due to regulatory or other reasons beyond our control.

The Senior Credit Facility and Indenture also limit the ability of the Borrowers and Issuers, respectively, to pay dividends or make other distributions to Trinseo S.A., which could then be used to make distributions to shareholders. During the nine months ended September 30, 2017, the Company declared total dividends of $1.02 per ordinary share (totaling $45.8 million), of which $16.8 million remains accrued as of September 30, 2017, the majority of which will be paid in October 2017. These dividends are well within the available capacity under the terms of the restrictive covenants contained in the Senior Credit Facility and Indenture. Further, significant additional capacity continues to be available under the terms of these covenants to support expected future dividends to shareholders, should the Company continue to declare them.

The Company’s cash flow generation in recent years has been strong, with positive cash flows expected to continue for full year 2017. We believe that funds provided by operations, our existing cash and cash equivalent balances, borrowings available under our 2022 Revolving Facility and borrowings available under our Accounts Receivable Securitization Facility will be adequate to meet planned operating and capital expenditures for at least the next 12 months under current operating conditions. Nevertheless, our ability to generate future cash and to pay our indebtedness and fund other liquidation needs is subject to certain risks described under “Part I, Item 1A-“Risk Factors” of our Annual Report.

Contractual Obligations and Commercial Commitments

Other than the impact of the Company’s debt refinancing during the third quarter of 2017, which included the issuance of our 2025 Senior Notes and 2024 Term Loan B, accompanied by the retirement of our 2022 Senior Notes and the 2021 Term Loan B (discussed in Note 5 to the condensed consolidated financial statements), there have been no material revisions outside the ordinary course of business to our contractual obligations as described within “Management’s

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Discussion and Analysis of Financial Condition and Results of Operations – Contractual Obligations and Commercial Commitments” within our Annual Report.

Critical Accounting Policies and Estimates

Our unaudited interim condensed consolidated financial statements are based on the selection and application of significant accounting policies. The preparation of unaudited interim condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenues and expenses at the date of and during the reporting period. Actual results could differ from those estimates. However, we are not currently aware of any reasonably likely events or circumstances that would result in materially different results.

We describe our significant accounting policies in Note 2, Basis of Presentation and Summary of Significant Accounting Policies, of the Notes to Consolidated Financial Statements included in our Annual Report, while we discuss our critical accounting policies and estimates in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” within our Annual Report. There have been no material revisions to the critical accounting policies as filed in our Annual Report,  other than the impacts to our accounting policies from our acquisition of API Plastics during the third quarter of 2017, discussed within Note 6 to the condensed consolidated financial statements, and the following addition to our critical accounting estimates as a result of this transaction.

Business Combinations

Acquisitions that qualify as a business combination are accounted for using the purchase accounting method. Amounts paid for an acquisition are allocated to the assets acquired and liabilities assumed based on their fair value as of the date of acquisition. Goodwill is recorded as the difference in the fair value of the acquired assets and liabilities assumed (net assets acquired) and the purchase price. Goodwill is not amortized, but is reviewed for impairment annually as of October 1st, or when events or changes in the business environment indicate that the carrying value of a reporting unit may exceed its fair value. Refer to the critical accounting policies and estimates in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” within our Annual Report for further information regarding the Company’s goodwill impairment testing methodology and significant judgments and assumptions applied.

Under the purchase accounting method, the Company completes valuation procedures for an acquisition, often with the assistance of third-party valuation specialists, to determine the fair value of the assets acquired and liabilities assumed. These valuation procedures require management to make assumptions and apply significant judgment to estimate the fair value of the assets acquired and liabilities assumed. If the estimates or assumptions used should significantly change, the resulting differences could materially affect the fair value of net assets.

Specifically, the calculation of the fair value of tangible assets, including property, plant and equipment, utilizes the cost approach, which computes the cost to replace the asset, less accrued depreciation resulting from physical deterioration, functional obsolescence and external obsolescence. The calculation of the fair value of identified intangible assets is determined using cash flow models following the income approach. Significant inputs include estimated future cash flows, discount rates, royalty rates, growth rates, sales projections, retention rates, and terminal values, all of which require significant management judgment. Definite-lived intangible assets, which are primarily comprised of developed technology, customer relationships, manufacturing capacity rights, and software, are amortized over their estimated useful lives using the straight-line method and are assessed for impairment whenever events or changes in circumstances indicate the carrying value of the asset may not be recoverable. Recoverability of assets that will continue to be used in ongoing operations is measured by comparing the carrying value of the asset to the forecasted undiscounted future cash flows related to the asset. In the event the carrying value of the asset exceeds its undiscounted future cash flows and the carrying value is not considered recoverable, impairment may exist. An impairment loss, if any, is measured as the excess of the asset’s carrying value over its fair value, generally based on a discounted future cash flow method, independent appraisals, etc.

48

Off-balance Sheet Arrangements

We do not have any off-balance sheet arrangements.

Recent Accounting Pronouncements

We describe the impact of recent accounting pronouncements in Note 2 to our condensed consolidated financial statements, included elsewhere within this Quarterly Report.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

As discussed in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” within our Annual Report, we are exposed to changes in interest rates and foreign currency exchange rates as well as changes in the prices of certain commodities that we use in production. There have been no material changes in our exposure to market risks from the information provided within our Annual Report and our Quarterly Report on Form 10-Q filed with the SEC on August 3, 2017.

Item 4. Controls and Procedures 

Evaluation of Disclosure Controls and Procedures

Our management is responsible for establishing and maintaining internal controls designed to provide reasonable assurance that information required to be disclosed by us in our reports that we file or submit under the Exchange Act (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended) is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, with the participation of our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures. Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the Company’s disclosure controls and procedures as of September 30, 2017. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures as of the end of the period covered by this Quarterly Report were effective to provide the reasonable level of assurance described above.

Changes in Internal Control over Financial Reporting

As discussed in Note 13 to the condensed consolidated financial statements, in July 2017, the Company completed the acquisition of API Plastics. As permitted by the SEC, management has elected to exclude this acquisition from its assessment of the effectiveness of its internal control over financial reporting as of December 31, 2017. The Company began to integrate API Plastics into its internal control over financial reporting structure subsequent to the acquisition date and expects to complete this integration by June 2018.

Aside from the API Plastics changes discussed above, there have been no additional changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) that occurred during the quarter ended September 30, 2017 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting. 

PART II — OTHER INFORMATION 

Item 1. Legal Proceedings  

From time to time we may be subject to various legal claims and proceedings incidental to the normal conduct of business, relating to such matters as product liability, antitrust, competition, waste disposal practices, release of chemicals into the environment and other matters that may arise in the ordinary course of our business. We currently believe that there is no litigation pending that is likely to have a material adverse effect on our business. Regardless of the outcome, legal proceedings can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

49

Item 1A. Risk Factors 

Our business faces various risks. Certain important factors may have a material adverse effect on our business prospects, financial condition and results of operations, and you should carefully consider them. Accordingly, in evaluating our business, we encourage you to consider the risk factors related to our ordinary shares as well those risk factors related to our business and industry which have been previously disclosed in Item 1A of our Annual Report for the year ended December 31, 2016, for which there have been no material changes. We encourage you to consider these risks, in their entirety, in addition to other information contained in or incorporated by reference into this Quarterly Report and our other public filings with the SEC. Other events that we do not currently anticipate or that we currently deem immaterial may also affect our business, prospects, financial condition and results of operations.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds 

(a)Recent sales of unregistered securities

None.

(b)Use of Proceeds from registered securities

None.

(c)Purchases of Equity Securities by the Issuer and Affiliated Purchasers

The following table contains information regarding purchases of our ordinary shares made during the quarter ended September 30, 2017 by or on behalf of the Company or any “affiliated purchaser,” as defined by Rule 10b-18(a)(3) of the Securities Exchange Act of 1934:

Issuer Purchases of Equity Securities
Period	Total number of shares purchased	Average price paid per share		Total number of shares purchased as part of publicly announced plans or programs	Approximate number of shares that may yet be purchased under the plans or programs
July 1 - July 31, 2017	—	$	—	—	2,000,000	(1)
August 1 - August 31, 2017	143,655	$	61.32	143,655	1,856,345	(1)
September 1 - September 30, 2017	—	$	—	—	1,856,345	(1)
Total	143,655	$	61.32	143,655

(1) The general meeting of our shareholders on June 21, 2017 authorized the Company to sunset the 2016 share repurchase authorization and replace it with a new authorization to repurchase up to 4.0 million ordinary shares at a price per share of not less than $1.00 and not more than $1,000. This authorization ends on June 21, 2020 or on the date of its renewal by a subsequent general meeting of shareholders. On June 22, 2017 the Company announced that the board of directors had authorized the Company to repurchase, subject to market and other conditions, up to 2.0 million shares over the subsequent 18 months under the 2017 share repurchase authorization.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

Item 6. Exhibits

See Exhibit Index.

50

EXHIBIT INDEX

Exhibit No.	Description
3.1	Amended and Restated Articles of Association of Trinseo S.A. (incorporated herein by reference to Exhibit 3.1 to the Quarterly Report filed on Form 10-Q, File No. 001-36473, filed August 3, 2017)
4.1	Form of Specimen Share Certificate of Trinseo S.A. (incorporated herein by reference to Exhibit 4.1 to Amendment No. 3 to the Registration Statement filed on Form S-1, File No. 333-194561, filed May 16, 2014)
4.2	Indenture among Trinseo Materials Operating S.C.A., Trinseo Materials Finance, Inc., and The Bank of New York Mellon, as Trustee, dated as of August 29, 2017 (incorporated herein by reference to Exhibit 4.1 to the Current Report filed on Form 8-K, File No. 001-36473, filed September 5, 2017)
10.1	Credit Agreement among Trinseo Materials Operating S.C.A., Trinseo Materials Finance, Inc., together with Trinseo Holding S.à r.l. and Trinseo Materials S.à r.l., Deutsche Bank AG New York Branch, as administrative agent, collateral agent, L/C issuer and swing line lender, and the guarantors and lenders party thereto from time to time, dated as of September 6, 2017 (incorporated herein by reference to Exhibit 10.1 to the Current Report filed on Form 8-K, File No. 001-36473, filed September 7, 2017)
10.2	Form of Cross-Currency Rate Swap Transaction Confirmation (incorporated herein by reference to Exhibit 10.2 to the Current Report filed on Form 8-K, File No. 001-36473, filed September 7, 2017)
31.1†	Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2†	Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1†	Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2†	Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS†	XBRL Instance Document
101.SCH†	XBRL Taxonomy Extension Schema Document
101.CAL†	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF†	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB†	XBRL Taxonomy Extension Label Linkbase Document
101.PRE†	XBRL Taxonomy Extension Presentation Linkbase Document

†  Filed herewith.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, duly authorized.

Date: November 3, 2017

TRINSEO S.A.
By:	/s/ Christopher D. Pappas
Name:	Christopher D. Pappas
Title:	President, Chief Executive Officer
	(Principal Executive Officer)
By:	/s/ Barry J. Niziolek
Name:	Barry J. Niziolek
Title:	Executive Vice President, Chief Financial Officer
	(Principal Financial Officer)

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Christopher D. Pappas, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Trinseo S.A.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal controls over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 3, 2017

By:	/s/ Christopher D. Pappas
Name:	Christopher D. Pappas
Title:	Chief Executive Officer

EX-31.2

Exhibit 31.2 

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Barry J. Niziolek, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Trinseo S.A.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal controls over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 3, 2017

J.
	By:	/s/ Barry J. Niziolek
	Name:	Barry J. Niziolek
	Title:	Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of CEO Pursuant to 18 U.S.C. Section 1350,

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the quarterly report of Trinseo S.A. (the “Company”) on Form 10-Q for the period ended September 30, 2017 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, the undersigned, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

(1)The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 3, 2017 

By:	/s/ Christopher D. Pappas
Name:	Christopher D. Pappas
Title:	Chief Executive Officer

EX-32.2

Exhibit 32.2 

Certification of CFO Pursuant to 18 U.S.C. Section 1350,

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the quarterly report of Trinseo S.A. (the “Company”) on Form 10-Q for the period ended September 30, 2017 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, the undersigned, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

(1) The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 3, 2017 

J.
	By:	/s/ Barry J. Niziolek
	Name:	Barry J. Niziolek
	Title:	Chief Financial Officer

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 01, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Entity Registrant Name	Trinseo S.A.
Entity Central Index Key	0001519061
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		43,704,689

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 318,703	$ 465,114
Accounts receivable, net of allowance for doubtful accounts (September 30, 2017 -- $6,045; December 31, 2016 -- $3,138)	719,094	564,428
Inventories	483,158	385,345
Other current assets	24,591	17,999
Total current assets	1,545,546	1,432,886
Investments in unconsolidated affiliates	161,883	191,418
Property, plant and equipment, net of accumulated depreciation (September 30, 2017 -- $505,100; December 31, 2016 -- $420,343)	600,067	513,757
Other assets
Goodwill	62,774	29,485
Other intangible assets, net	207,819	177,345
Deferred income tax assets-noncurrent	46,942	40,187
Deferred charges and other assets	31,521	24,412
Total other assets	349,056	271,429
Total assets	2,656,552	2,409,490
Current liabilities
Short-term borrowings and current portion of long-term debt	7,000	5,000
Accounts payable	415,709	378,029
Income taxes payable	32,006	23,784
Accrued expenses and other current liabilities	140,988	135,357
Total current liabilities	595,703	542,170
Noncurrent liabilities
Long-term debt, net of unamortized deferred financing fees	1,165,924	1,160,369
Deferred income tax liabilities - noncurrent	40,332	24,844
Other noncurrent obligations	284,551	237,054
Total noncurrent liabilities	1,490,807	1,422,267
Commitments and contingencies (Note 9)
Shareholders' equity
Ordinary shares, $0.01 nominal value, 50,000,000 shares authorized (September 30, 2017: 48,778 shares issued and 43,703 shares outstanding; December 31, 2016, 48,778 shares issued and 44,301 shares outstanding)	488	488
Additional paid-in-capital	576,790	573,662
Treasury shares, at cost (September 30, 2017: 5,075 shares; December 31, 2016: 4,477 shares)	(263,673)	(217,483)
Retained earnings	423,456	258,540
Accumulated other comprehensive loss	(167,019)	(170,154)
Total shareholders' equity	570,042	445,053
Total liabilities and shareholders' equity	$ 2,656,552	$ 2,409,490

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Consolidated Balance Sheets
Allowance for doubtful accounts	$ 6,045	$ 3,138
Accumulated depreciation	$ 505,100	$ 420,343
Ordinary shares, nominal value	$ 0.01	$ 0.01
Ordinary shares, shares authorized	50,000,000,000	50,000,000,000
Ordinary shares, shares issued	48,778,000	48,778,000
Ordinary shares, shares outstanding	43,703,000	44,301,000
Treasury stock, shares	5,075,000	4,477,000

XML

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statements of Operations
Net sales	$ 1,096,582	$ 935,410	$ 3,346,271	$ 2,799,188
Cost of sales	949,457	795,026	2,876,137	2,349,392
Gross profit	147,125	140,384	470,134	449,796
Selling, general and administrative expenses	65,732	73,900	181,552	180,635
Equity in earnings of unconsolidated affiliates	43,807	36,686	93,029	110,314
Operating income	125,200	103,170	381,611	379,475
Interest expense, net	18,436	18,832	55,355	56,542
Loss on extinguishment of long-term debt	65,260		65,260
Other expense (income), net	(11)	1,084	(6,072)	16,628
Income before income taxes	41,515	83,254	267,068	306,305
Provision for income taxes	8,300	16,000	56,400	66,500
Net income	$ 33,215	$ 67,254	$ 210,668	$ 239,805
Weighted average shares- basic	43,745	45,865	43,900	47,152
Net income per share- basic	$ 0.76	$ 1.47	$ 4.80	$ 5.09
Weighted average shares- diluted	44,782	46,961	45,046	48,041
Net income per share- diluted	$ 0.74	$ 1.43	$ 4.68	$ 4.99
Dividends per share	$ 0.36	$ 0.30	$ 1.02	$ 0.60

XML

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statements of Comprehensive Income (Loss)
Net income	$ 33,215	$ 67,254	$ 210,668	$ 239,805
Other comprehensive income (loss), net of tax (tax amounts shown in millions below for the three and six months ended September 30, 2017 and 2016, respectively):
Cumulative translation adjustments	(1,561)	1,488	21,614	3,906
Net loss on cash flow hedges	(3,715)	(2,280)	(21,491)	(3,676)
Pension and other postretirement benefit plans:
Net loss arising during period (net of tax of: 2017 -- $0 and $0; 2016 -- $0 and ($0.5))				(800)
Amounts reclassified from accumulated other comprehensive income (loss)	840	533	3,012	1,612
Total other comprehensive income (loss), net of tax	(4,436)	(259)	3,135	1,042
Comprehensive income	$ 28,779	$ 66,995	$ 213,803	$ 240,847

XML

Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statements of Comprehensive Income (Loss)
Net loss arising during period, tax (benefit) expense	$ 0.0	$ 0.0	$ 0.0	$ (0.5)

XML

Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Ordinary Shares	Additional Paid-In Capital	Treasury Shares	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit).	Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting standard		$ 915			$ (915)
Balance at beginning of period at Dec. 31, 2015	$ 488	556,532		$ (149,717)	(18,289)	$ 389,014
Balance at beginning of period, shares at Dec. 31, 2015	48,778
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income					239,805	239,805
Other comprehensive income				1,042		1,042
Stock-based compensation		14,057	$ 914			14,971
Stock-based compensation, shares from treasury stock	25		(25)
Purchase of treasury shares			$ (194,079)			(194,079)
Purchase of treasury shares, shares	(4,150)		4,150
Dividends on ordinary shares					(27,316)	(27,316)
Balance at end of period at Sep. 30, 2016	$ 488	571,504	$ (193,165)	(148,675)	193,285	423,437
Balance at end of period, shares at Sep. 30, 2016	44,653		4,125
Balance at beginning of period at Jun. 30, 2016				(148,416)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						67,254
Other comprehensive income						(259)
Balance at end of period at Sep. 30, 2016	$ 488	571,504	$ (193,165)	(148,675)	193,285	423,437
Balance at end of period, shares at Sep. 30, 2016	44,653		4,125
Balance at beginning of period at Dec. 31, 2016	$ 488	573,662	$ (217,483)	(170,154)	258,540	$ 445,053
Balance at beginning of period, shares at Dec. 31, 2016	44,301		4,477			44,301
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income					210,668	$ 210,668
Other comprehensive income				3,135		3,135
Stock-based compensation		3,128	$ 15,674			18,802
Stock-based compensation, shares from treasury stock	440		(440)
Purchase of treasury shares			$ (61,864)			(61,864)
Purchase of treasury shares, shares	(1,038)		1,038
Dividends on ordinary shares					(45,752)	(45,752)
Balance at end of period at Sep. 30, 2017	$ 488	576,790	$ (263,673)	(167,019)	423,456	$ 570,042
Balance at end of period, shares at Sep. 30, 2017	43,703		5,075			43,703
Balance at beginning of period at Jun. 30, 2017				(162,583)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						$ 33,215
Other comprehensive income						(4,436)
Balance at end of period at Sep. 30, 2017	$ 488	$ 576,790	$ (263,673)	$ (167,019)	$ 423,456	$ 570,042
Balance at end of period, shares at Sep. 30, 2017	43,703		5,075			43,703

XML

Consolidate Statements of Shareholders' Equity (Parenthetical)) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statement of Stockholders' Equity
Dividends per share	$ 0.36	$ 0.30	$ 1.02	$ 0.60

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net income	$ 210,668	$ 239,805
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	80,220	71,744
Amortization of deferred financing fees and issuance discount	3,968	4,469
Deferred income tax	(2,636)	9,895
Stock-based compensation expense	10,752	14,842
Earnings of unconsolidated affiliates, net of dividends	(4,097)	(8,972)
Unrealized net losses (gains) on foreign exchange forward contracts	(2,804)	3,533
Loss on extinguishment of long-term debt	65,260
Loss (gain) on sale of businesses and other assets	(10,473)	13,091
Impairment charges	4,293	14,310
Changes in assets and liabilities
Accounts receivable	(92,776)	(30,229)
Inventories	(57,315)	(27,605)
Accounts payable and other current liabilities	(989)	23,138
Income taxes payable	6,297	3,973
Other assets, net	(14,407)	(18,426)
Other liabilities, net	(1,116)	11,130
Cash provided by operating activities	194,845	324,698
Cash flows from investing activities
Capital expenditures	(108,875)	(82,678)
Cash paid to acquire a business, net of cash acquired	(79,650)
Proceeds from the sale of businesses and other assets	46,166	174
Distributions from unconsolidated affiliates	857	4,809
Cash used in investing activities	(141,502)	(77,695)
Cash flows from financing activities
Deferred financing fees	(19,175)
Short term borrowings, net	(191)	(126)
Purchase of treasury shares	(65,225)	(194,079)
Dividends paid	(42,231)	(13,920)
Proceeds from exercise of option awards	8,349	203
Withholding taxes paid on restricted share units	(302)	(74)
Net proceeds from issuance of 2024 Term Loan B	700,000
Repayments of 2021 Term Loan B	(492,500)	(3,750)
Net proceeds from issuance of 2025 Senior Notes	500,000
Repayments of 2022 Senior Notes	(745,950)
Prepayment penalty on long-term debt	(52,978)
Cash used in financing activities	(210,203)	(211,746)
Effect of exchange rates on cash	10,449	(231)
Net change in cash and cash equivalents	(146,411)	35,026
Cash and cash equivalents, beginning of period	465,114	431,261
Cash and cash equivalents, end of period	$ 318,703	$ 466,287

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Basis of Presentation

9 Months Ended

Sep. 30, 2017

Basis of Presentation.

Basis of Presentation

NOTE 1—BASIS OF PRESENTATION

The unaudited interim condensed consolidated financial statements of Trinseo S.A. and its subsidiaries (the “Company”) as of and for the periods ended September 30, 2017 and 2016 were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and reflect all adjustments, consisting only of normal recurring adjustments, which, in the opinion of management, are considered necessary for the fair statement of the results for the periods presented. Because they cover interim periods, the statements and related notes to the financial statements do not include all disclosures normally provided in annual financial statements and, therefore, these statements should be read in conjunction with the 2016 audited consolidated financial statements included within the Company’s Annual Report on Form 10-K (“Annual Report”) filed with the Securities and Exchange Commission (“SEC”) on March 1, 2017.

The December 31, 2016 condensed consolidated balance sheet data presented herein was derived from the Company’s December 31, 2016 audited consolidated financial statements, but does not include all disclosures required by GAAP for annual periods.

Certain prior year amounts have been reclassified to conform to the current period presentation. These reclassifications did not have a material impact on the Company’s financial position or results. Refer to Note 14 for further information.

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Recent Accounting Guidance

9 Months Ended

Sep. 30, 2017

Recent Accounting Guidance

Recent Accounting Guidance

NOTE 2—RECENT ACCOUNTING GUIDANCE

In May 2014, the Financial Accounting Standards Board (“FASB”) and the International Accounting Standards Board (“IASB”) jointly issued guidance which clarifies the principles for recognizing revenue and develops a common revenue standard for GAAP and International Financial Reporting Standards (“IFRS”). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additionally, the FASB has issued certain clarifying updates to this guidance, which the Company will consider as part of our adoption, which will be effective as of January 1, 2018. The Company has completed its scoping assessment for the adoption of this guidance by conducting surveys with relevant stakeholders in the business, including commercial and finance leadership, reviewing a representative sample of revenue arrangements across all businesses, and identifying a set of applicable qualitative revenue recognition changes related to the new standard update.  In completing this phase, the Company has identified its major revenue streams, which are concentrated within individual product sales within each of our reportable segments. As a result of this work, the Company has concluded that it will adopt this new guidance applying the modified retrospective approach.  The Company remains in the process of establishing and documenting key accounting policies, assessing new disclosure requirements, and evaluating impacts on business processes, information technology, and controls resulting from the adoption of this new standard. Additionally, while our final assessment has not been completed, we continue to progress in the quantification of the impacts that this standard will have on our consolidated financial statements and are refining certain estimates that will be used in order to calculate such impacts.

In July 2015, the FASB issued guidance which simplifies the subsequent measurement of inventory by replacing the lower of cost or market test with a lower of cost or net realizable value (“NRV”) test. NRV is calculated as the estimated selling price less reasonably predictable costs of completion, disposal and transportation. The Company adopted this guidance effective January 1, 2017, and the adoption did not have a material impact to the Company’s financial position or results of operations.

In February 2016, the FASB issued guidance related to leases that outlines a comprehensive lease accounting model and supersedes the current lease guidance. The new guidance requires lessees to recognize on the consolidated balance sheets lease liabilities and corresponding right-of-use assets for all leases with terms of greater than 12 months. It also changes the definition of a lease and expands the disclosure requirements of lease arrangements. This new guidance is effective for public companies for annual and interim periods beginning after December 15, 2018, with early adoption permitted. The new guidance must be adopted using a modified retrospective transition, and provides for certain practical expedients. The Company is in the process of assessing the impact on its consolidated financial statements from the adoption of the new guidance. However, as we are the lessee under various real estate, railcar, and other equipment leases, which we currently account for as operating leases, we anticipate an increase in the recognition of right-of-use assets and lease liabilities as a result of this adoption.  

In August 2016, the FASB issued guidance that aims to eliminate diversity in practice for how certain cash receipts and payments are presented and classified in the consolidated statements of cash flows. Additionally, the FASB has issued further guidance related to the presentation of restricted cash on the consolidated statements of cash flows. The Company adopted this guidance effective September 30, 2017. The most significant impact of this adoption to the Company was the requirement to classify debt prepayment or extinguishment costs, which the Company had historically classified within cash flows from operating activities, as financing cash outflows. This change is reflected in the Company’s condensed consolidated statement of cash flows for the nine months ended September 30, 2017, including the impacts of the Company’s debt refinancing during the third quarter of 2017 (refer to Note 5 for further information). While this adoption was applied using the retrospective approach, there were no transactions during the nine months ended September 30, 2016 that required the condensed consolidated statement of cash flows for that period to be recast.

In January 2017, the FASB issued guidance that revises the definition of a business in order to assist in determining whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. Under the new guidance, fewer transactions are expected to be accounted for as business combinations. The Company adopted this guidance effective January 1, 2017. We expect this adoption could affect conclusions reached for future transactions in several areas, including acquisitions and disposals.

In January 2017, the FASB issued guidance to simplify the accounting for goodwill impairment by removing Step 2 of the test, which requires a hypothetical purchase price allocation. As a result, a goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The Company adopted this guidance effective January 1, 2017, which did not have a material impact to the Company’s financial position or results of operations.

In March 2017, the FASB issued guidance that requires employers to present the service cost component of net periodic benefit cost in the same statement of operations line item as other employee compensation costs arising from services rendered during the period. The other components of net periodic benefit cost are to be presented outside of any subtotal of operating income. This presentation amendment is relevant to the Company and will be applied on a retrospective basis. This guidance is effective for fiscal years and interim periods beginning after December 15, 2017, and early adoption is permitted. The Company is currently assessing the impact of adopting this guidance on its results of operations.

In August 2017, the FASB issued significant amendments to existing hedge accounting guidance. Among other things, this guidance will make more financial and nonfinancial hedging strategies eligible for hedge accounting, amend presentation and disclosure requirements, and change how companies assess effectiveness. This guidance is required for public companies for annual and interim periods beginning after December 15, 2018, with early adoption permitted. The Company is currently assessing the timing and related impact of adopting this guidance on its financial position and results of operations.

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Investments in Unconsolidated Affiliates

9 Months Ended

Sep. 30, 2017

Investments in Unconsolidated Affiliates

Investments in Unconsolidated Affiliates

NOTE 3—INVESTMENTS IN UNCONSOLIDATED AFFILIATES

During the nine months ended September 30, 2017, the Company had two joint ventures: Americas Styrenics LLC (“Americas Styrenics”, a styrene and polystyrene joint venture with Chevron Phillips Chemical Company LP) and Sumika Styron Polycarbonate Limited (“Sumika Styron Polycarbonate”, a polycarbonate joint venture with Sumitomo Chemical Company Limited). Investments held in the unconsolidated affiliates are accounted for by the equity method. The results of Americas Styrenics are included within its own reporting segment, and the results of Sumika Styron Polycarbonate were included within the Basic Plastics reporting segment until the Company sold its 50% share of the entity in January 2017. Refer to the discussion below for further information about the sale of the Company’s share in Sumika Styron Polycarbonate during the first quarter of 2017.

Both of the unconsolidated affiliates are privately held companies; therefore, quoted market prices for their stock are not available. The summarized financial information of the Company’s unconsolidated affiliates is shown below. This table includes summarized financial information for Sumika Styron Polycarbonate through the date of sale in January 2017.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Sales	$	458,744	$	460,305	$	1,369,572	$	1,241,908
Gross profit	$	90,594	$	84,095	$	176,352	$	240,366
Net income	$	81,059	$	65,041	$	141,508	$	188,853

Americas Styrenics

As of September 30, 2017 and December 31, 2016, respectively, the Company’s investment in Americas Styrenics was $161.9 million and $149.7 million, which was $49.1 million and $71.2 million less than the Company’s 50% share of the underlying net assets of Americas Styrenics. This amount represents the difference between the book value of assets contributed to the joint venture at the time of formation (May 1, 2008) and the Company’s 50% share of the total recorded value of the joint venture’s assets and certain adjustments to conform with the Company’s accounting policies. This difference is being amortized over a weighted average remaining useful life of the contributed assets of approximately 3.1 years as of September 30, 2017. The Company received dividends from Americas Styrenics of $35.0 million and $80.0 million during the three and nine months ended September 30, 2017, respectively, compared to $40.0 million and $100.0 million during the three and nine months ended September 30, 2016, respectively.

Sumika Styron Polycarbonate

On January 31, 2017, the Company completed the sale of its 50% share in Sumika Styron Polycarbonate to Sumitomo Chemical Company Limited for total sales proceeds of approximately $42.1 million. As a result, the Company recorded a gain on sale of $9.3 million during the nine months ended September 30, 2017, which was included within “Other expense (income), net” in the condensed consolidated statement of operations and was allocated entirely to the Basic Plastics segment. In addition, the parties have entered into a long-term agreement to continue sourcing polycarbonate resin from Sumika Styron Polycarbonate to the Company’s Performance Plastics segment.

As of December 31, 2016, the Company’s investment in Sumika Styron Polycarbonate was $41.8 million. Due to the sale in January 2017, the Company no longer has an investment in Sumika Styron Polycarbonate as of September 30, 2017. The Company received dividends from Sumika Styron Polycarbonate of zero and $9.8 million during the three and nine months ended September 30, 2017,  respectively, compared to  zero and $6.2 million during the three and nine months ended September 30, 2016, respectively. The dividend received during the nine months ended September 30, 2017 from Sumika Styron Polycarbonate related to the Company’s proportionate share of earnings for the year ended December 31, 2016.

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Inventories

9 Months Ended

Sep. 30, 2017

Inventories

Inventories

NOTE 4—INVENTORIES

Inventories consisted of the following:

	September 30,		December 31,
	2017		2016
Finished goods	$	239,663	$	187,577
Raw materials and semi-finished goods		211,186		168,804
Supplies		32,309		28,964
Total	$	483,158	$	385,345

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Debt

9 Months Ended

Sep. 30, 2017

Debt

Debt

NOTE 5—DEBT

Refer to discussion below for details of the Company’s debt refinancing that occurred during the third quarter of 2017. For definitions of capitalized terms not included herein, refer to the Annual Report. The Company was in compliance with all debt related covenants as of September 30, 2017 and December 31, 2016.

As of September 30, 2017 and December 31, 2016, debt consisted of the following:

			September 30, 2017
	Interest Rate as of September 30, 2017	Maturity Date	Carrying Amount		Unamortized Deferred Financing Fees(1)		Total Debt, Less Unamortized Deferred Financing Fees
Senior Credit Facility
2022 Revolving Facility(2)	Various	September 2022	$	—	$	—	$	—
2024 Term Loan B(3)	3.735%	September 2024		700,000		(18,957)		681,043
2025 Senior Notes	5.375%	September 2025		500,000		(9,600)		490,400
Accounts Receivable Securitization Facility(4)	Various	May 2019		—		—		—
Other indebtedness	Various	Various		1,481		—		1,481
Total debt			$	1,201,481	$	(28,557)	$	1,172,924
Less: current portion								(7,000)
Total long-term debt, net of unamortized deferred financing fees							$	1,165,924

			December 31, 2016
	Interest Rate as of December 31, 2016	Maturity Date	Carrying Amount		Unamortized Deferred Financing Fees(1)		Total Debt, Less Unamortized Deferred Financing Fees
2020 Senior Credit Facility
2020 Revolving Facility	Various	May 2020	$	—	$	—	$	—
2021 Term Loan B	4.250%	November 2021		491,545		(9,159)		482,386
2022 Senior Notes
USD Notes	6.750%	May 2022		300,000		(5,726)		294,274
Euro Notes	6.375%	May 2022		394,275		(7,157)		387,118
Accounts Receivable Securitization Facility	Various	May 2019		—		—		—
Other indebtedness	Various	Various		1,591		—		1,591
Total debt			$	1,187,411	$	(22,042)	$	1,165,369
Less: current portion								(5,000)
Total long-term debt, net of unamortized deferred financing fees							$	1,160,369

(1) This caption does not include deferred financing fees related to the Company’s revolving facilities, which are included within “Deferred charges and other assets” on the condensed consolidated balance sheets.

(2) The Company had $357.2 million (net of $17.8 million outstanding letters of credit) of funds available for borrowing under this facility as of September 30, 2017. Additionally, the Company is required to pay a quarterly commitment fee in respect of any unused commitments under this facility equal to 0.375% per annum.

(3) The 2024 Term Loan B bears an interest rate of LIBOR plus 2.50%, subject to a 0.00% LIBOR floor. As of September 30, 2017, $7.0 million of the scheduled future payments related to this facility were classified as current debt on the Company’s condensed consolidated balance sheet.

(4) This facility has a borrowing capacity of $200.0 million. As of September 30, 2017, the Company had approximately $148.8 million of accounts receivable available to support this facility, based on the pool of eligible accounts receivable. In regards to outstanding borrowings, fixed interest charges are 2.6% plus variable commercial paper rates, while for available, but undrawn commitments, fixed interest charges are 1.4%.

2020 Senior Credit Facility

On May 5, 2015, the Company entered into a credit agreement which included $825.0 million of senior secured financing (the “2020 Senior Credit Facility”), inclusive of a $325.0 million revolving credit facility maturing in May 2020 (the “2020 Revolving Facility”) and a $500.0 million senior secured term loan B facility maturing in November 2021 (the “2021 Term Loan B”).

In September 2017, upon completion of the refinancing transactions discussed below, the Company terminated the 2020 Senior Credit Facility. Prior to this termination, the Company had no outstanding borrowings under the 2020 Revolving Facility and had $490.0 million outstanding under the 2021 Term Loan B, excluding unamortized original issue discount. As a result of this termination, the Company recognized a $0.8 million loss on extinguishment of long-term debt, comprised entirely of the write-off of a portion of the existing unamortized deferred financing fees and unamortized original issue discount related to the 2021 Term Loan B. The remaining unamortized deferred financing fees and unamortized original issue discount for both the 2020 Revolving Facility and 2021 Term Loan B remain capitalized and will be amortized along with new deferred financing fees over the life of the new facilities, discussed in further detail below.

Senior Credit Facility

On September 6, 2017, Trinseo Materials Operating S.C.A. and Trinseo Materials Finance, Inc. (together, the “Borrowers” or “Issuers”), both wholly-owned subsidiaries of the Company, entered into a senior secured credit agreement (the “Credit Agreement”), which provides senior secured financing of up to $1,075.0 million (the “Senior Credit Facility”). The Senior Credit Facility provides for senior secured financing consisting of a (i) $375.0 million revolving credit facility, with a $25.0 million swingline subfacility and a $35.0 million letter of credit subfacility maturing in September 2022 (the “2022 Revolving Facility”) and a (ii) $700.0 million senior secured term loan B facility maturing in September 2024 (the “2024 Term Loan B”). Amounts under the 2022 Revolving Facility are available in U.S. dollars and euros.

The 2024 Term Loan B bears an interest rate of LIBOR plus 2.50%, subject to a 0.00% LIBOR floor. Further, the 2024 Term Loan B requires scheduled quarterly payments in amounts equal to 0.25% of the original principal amount of the 2024 Term Loan B, with the balance to be paid at maturity.

Loans under the 2022 Revolving Facility, at the Borrowers’ option, may be maintained as (a) LIBO rate loans, which bear interest at a rate per annum equal to the LIBO rate plus the applicable margin (as defined in the Credit Agreement), if applicable, or (b) base rate loans which shall bear interest at a rate per annum equal to the base rate plus the applicable margin (as defined in the Credit Agreement).

The Senior Credit Facility is collateralized by a security interest in substantially all of the assets of the Borrowers, and the guarantors thereunder, including Trinseo Materials S.à r.l., certain Luxembourg subsidiaries and certain foreign subsidiaries organized in the United States, The Netherlands, Hong Kong, Singapore, Ireland, Germany and Switzerland.

 The Senior Credit Facility requires the Borrowers and their restricted subsidiaries to comply with customary affirmative, negative and financial covenants, including limitations on their abilities to incur liens; make certain loans and investments; incur additional debt (including guarantees or other contingent obligations); merge, consolidate liquidate or dissolve; transfer or sell assets; pay dividends and other distributions to shareholders or make certain other restricted payments; enter into transactions with affiliates; restrict any restricted subsidiary from paying dividends or making other distributions or agree to certain negative pledge clauses; materially alter the business we conduct; prepay certain other indebtedness; amend certain material documents; and change our fiscal year.

The 2022 Revolving Facility contains a financial covenant that requires compliance with a springing first lien net leverage ratio test. If the outstanding balance under the 2022 Revolving Facility exceeds 30% of the $375.0 million borrowing capacity (excluding undrawn letters of credit up to $10.0 million and cash collateralized letters of credit) at a quarter end, then the Borrowers’ first lien net leverage ratio may not exceed 2.00 to 1.00.  As of September 30, 2017, the Company was in compliance with all debt covenant requirements under the Senior Credit Facility.

Fees incurred in connection with the issuance of the 2024 Term Loan B were $12.3 million. Due to a portion of the 2024 Term Loan B meeting the criteria for modification accounting, $1.2 million of these fees were expensed and included within “Other expense (income), net” in the condensed consolidated statement of operations for the three and nine months ended September 30, 2017. The remaining $11.1 million of fees were capitalized and recorded within “Long-term debt, net of unamortized deferred financing fees” on the condensed consolidated balance sheet, to be amortized along with the remaining $8.1 million of unamortized deferred financing fees from the 2021 Term Loan B. Capitalized fees related to the 2024 Term Loan B are being amortized over the 7.0 year term of the facility using the effective interest method.

Fees incurred in connection with the issuance of the 2022 Revolving Facility were $0.8 million and were capitalized and recorded within “Deferred charges and other assets” in the condensed consolidated balance sheets. The new capitalized fees related to the 2022 Revolving Facility (along with $4.0 million of unamortized deferred financing fees from the 2020 Revolving Facility) are being amortized over the 5.0 year term of the facility using the straight-line method. Amortization of deferred financing fees are recorded within “Interest expense, net” in the condensed consolidated statements of operations.

2022 Senior Notes

In May 2015, the Company issued $300.0 million aggregate principal amount of 6.750% senior notes due May 1, 2022 (the “USD Notes”) and €375.0 million aggregate principal amount of 6.375% senior notes due May 1, 2022 (the “Euro Notes”, and together with the USD Notes, the “2022 Senior Notes”).

On September 7, 2017, using the net proceeds from the issuance of the 2024 Term Loan B, together with the net proceeds from the issuance of the 2025 Senior Notes (defined and discussed below), and available cash, the Company redeemed all outstanding borrowings under the 2022 Senior Notes, totaling $746.0 million in USD-equivalent principal, together with a total combined call premium of $53.0 million (with a redemption price of approximately 106.572% on the USD Notes and a redemption price of approximately 107.459% on the Euro Notes), and accrued and unpaid interest thereon of $17.0 million, using applicable foreign exchange rates.

As a result of this redemption, during the three months ended September 30, 2017, the Company recorded a loss on extinguishment of long-term debt of $64.5 million, which includes the above $53.0 million call premium and an $11.5 million write-off of unamortized deferred financing fees related to the 2022 Senior Notes.

2025 Senior Notes

On August 29, 2017, the Issuers executed an indenture pursuant to which they issued $500.0 million aggregate principal amount of 5.375% senior notes due 2025 (the “2025 Senior Notes”) in a 144A private transaction exempt from the registration requirements of the Securities Act of 1933, as amended. Interest on the 2025 Senior Notes is payable semi-annually on May 3 and November 3 of each year, commencing on May 3, 2018. The 2025 Senior Notes mature on September 1, 2025.

At any time prior to September 1, 2020, the Issuers may redeem the 2025 Senior Notes in whole or in part, at their option, at a redemption price equal to 100% of the principal amount of such notes plus the relevant applicable premium as of, and accrued and unpaid interest to, but not including, the redemption date. At any time and from time to time after September 1, 2020, the Issuers may redeem the 2025 Senior Notes, in whole or in part, at a redemption price equal to the percentage of principal amount set forth below plus accrued and unpaid interest, if any, on the notes redeemed to, but not including, the redemption date:

12-month period commencing September 1 in Year	Percentage
2020	102.688	%
2021	101.792	%
2022	100.896	%
2023 and thereafter	100.000	%

At any time prior to September 1, 2020, the Issuers may redeem up to 40% of the aggregate principal amount of the 2025 Senior Notes at a redemption price equal to 105.375%, plus accrued and unpaid interest to, but not including, the redemption date, with the aggregate gross proceeds from certain equity offerings.

The 2025 Senior Notes are the Issuers’ senior unsecured obligations and rank equally in right of payment with all of the Issuers’ existing and future indebtedness that is not expressly subordinated in right of payment thereto. The 2025 Senior Notes will be senior in right of payment to any future indebtedness that is expressly subordinated in right of payment thereto and effectively junior to (a) the Issuers’ existing and future secured indebtedness, including the Company’s accounts receivable facility and the Issuers’ Senior Credit Facility (discussed above), to the extent of the value of the collateral securing such indebtedness and (b) all existing and future liabilities of the Issuers’ non-guarantor subsidiaries.

The Indenture contains customary covenants that, among other things, limit the Issuers’ and certain of their subsidiaries’ ability to incur additional indebtedness and guarantee indebtedness; pay dividends on, redeem or repurchase capital stock; make investments; prepay certain indebtedness; create liens; enter into transactions with the Issuers’ affiliates; designate the Issuers’ subsidiaries as Unrestricted Subsidiaries (as defined in the Indenture); and consolidate, merge, or transfer all or substantially all of the Issuers’ assets. The covenants are subject to a number of exceptions and qualifications. Certain of these covenants will be suspended during any period of time that (1) the 2025 Senior Notes have investment grade ratings (as defined in the Indenture) and (2) no default has occurred and is continuing under the Indenture. In the event that the 2025 Senior Notes are downgraded to below an investment grade rating, the Issuers and certain subsidiaries will again be subject to the suspended covenants with respect to future events. As of September 30, 2017, the Company was in compliance with all debt covenant requirements under the Indenture.

Fees and expenses incurred in connection with the issuance of the 2025 Senior Notes were $9.7 million, which were capitalized and recorded within “Long-term debt, net of unamortized deferred financing fees” on the condensed consolidated balance sheet, and are being amortized into “Interest expense, net” in the condensed consolidated statements of operations over their 8.0 year term using the effective interest method.

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Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets.

Goodwill and Intangible Assets

NOTE 6—GOODWILL AND INTANGIBLE ASSETS

Goodwill

The following table shows changes in the carrying amount of goodwill by segment from December 31, 2016 to September 30, 2017:

	Performance Materials						Basic Plastics & Feedstocks
	Latex		Synthetic		Performance		Basic				Americas
	Binders		Rubber		Plastics		Plastics		Feedstocks		Styrenics		Total
Balance at December 31, 2016	$	11,544	$	8,177	$	4,210	$	5,554	$	—	$	—	$	29,485
Acquisition (Note 13)		—		—		28,598		—		—		—		28,598
Foreign currency impact		1,415		1,002		1,592		682		—		—		4,691
Balance at September 30, 2017	$	12,959	$	9,179	$	34,400	$	6,236	$	—	$	—	$	62,774

Other Intangible Assets

The following table provides information regarding the Company’s other intangible assets as of September 30, 2017 and December 31, 2016, respectively:

		September 30, 2017						December 31, 2016
	Estimated	Gross						Gross
	Useful Life	Carrying		Accumulated				Carrying		Accumulated
	(Years)	Amount		Amortization		Net		Amount		Amortization		Net
Developed technology(1)	9 - 15	$	198,535	$	(91,078)	$	107,457	$	166,230	$	(72,159)	$	94,071
Customer Relationships(1)	19		14,520		(171)		14,349		—		—		—
Manufacturing Capacity Rights	6		22,426		(12,728)		9,698		19,977		(8,908)		11,069
Software	5 - 10		87,412		(22,617)		64,795		82,275		(15,095)		67,180
Software in development	N/A		8,617		—		8,617		4,751		—		4,751
Other(1)	3		3,056		(153)		2,903		274		—		274
Total		$	334,566	$	(126,747)	$	207,819	$	273,507	$	(96,162)	$	177,345

(1) Balances as of September 30, 2017 include assets acquired related to the acquisition of API Applicazioni Plastiche Industriali S.p.A (“API Plastics”). Refer to Note 13 for further information.

Amortization expense on other intangible assets totaled $7.2 million and $19.6 million for the three and nine months ended September 30, 2017, respectively, and $5.0 million and $15.2 million for the three and nine months ended September 30, 2016.

In addition to the significant accounting policies disclosed in Note 2 in our Annual Report, Basis of Presentation and Summary of Significant Accounting Policies, the Company notes the following significant accounting policies related to certain definite-lived intangible assets, for which we had substantial activity during the quarter ended September 30, 2017 as a result of the API Plastics acquisition.

Developed Technology

Acquired developed technology is recorded at fair value upon acquisition and is amortized using the straight-line method over the estimated useful life ranging from 9 years to 15 years. We determine amortization periods for developed technology based on our assessment of various factors impacting estimated useful lives and timing and extent of estimated cash flows of the acquired assets. This includes estimates of expected period of future economic benefit and competitive advantage related to existing processes and procedures at the date of acquisition. Significant changes to any of these factors may result in a reduction in the useful life of these assets.

Customer Relationships

Customer relationships are recorded at fair value upon acquisition and are amortized using the straight-line method over the estimated useful life of 19 years. We determine amortization periods for customer relationships based on our assessment of various factors impacting estimated useful lives and timing and extent of estimated cash flows of the acquired assets. This includes estimates of expected period of future economic benefit and customer retention rates. Significant changes to any of these factors may result in a reduction in the useful life of these assets.

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Derivative Instruments

9 Months Ended

Sep. 30, 2017

Derivative Instruments [Abstract]

Derivative Instruments

NOTE 7—DERIVATIVE INSTRUMENTS

The Company’s ongoing business operations expose it to various risks, including fluctuating foreign exchange rates and interest rate risk. To manage these risks, the Company periodically enters into derivative financial instruments, such as foreign exchange forward contracts and interest rate swap agreements. The Company does not hold or enter into financial instruments for trading or speculative purposes. All derivatives are recorded on the condensed consolidated balance sheets at fair value.

Foreign Exchange Forward Contracts

Certain subsidiaries have assets and liabilities denominated in currencies other than their respective functional currencies, which creates foreign exchange risk. The Company’s principal strategy in managing its exposure to changes in foreign currency exchange rates is to naturally hedge the foreign currency-denominated liabilities on our balance sheet against corresponding assets of the same currency such that any changes in liabilities due to fluctuations in exchange rates are offset by changes in their corresponding foreign currency assets. In order to further reduce its exposure, the Company also uses foreign exchange forward contracts to economically hedge the impact of the variability in exchange rates on our assets and liabilities denominated in certain foreign currencies. These derivative contracts are not designated for hedge accounting treatment.

As of September 30, 2017, the Company had open foreign exchange forward contracts with a notional U.S. dollar equivalent absolute value of $327.9 million. The following table displays the notional amounts of the most significant net foreign exchange hedge positions outstanding as of September 30, 2017.

	September 30,
Buy / (Sell)	2017
Euro	$	(161,885)
Chinese Yuan	$	(58,335)
Indonesian Rupiah	$	(29,493)
Swiss Franc	$	16,762
Korean Won	$	(10,983)

Foreign Exchange Cash Flow Hedges

The Company also enters into forward contracts with the objective of managing the currency risk associated with forecasted U.S. dollar-denominated raw materials purchases by one of its subsidiaries whose functional currency is the euro. By entering into these forward contracts, which are designated as cash flow hedges, the Company buys a designated amount of U.S. dollars and sells euros at the prevailing market rate to mitigate the risk associated with the fluctuations in the euro-to-U.S. dollar foreign currency exchange rates. The qualifying hedge contracts are marked-to-market at each reporting date and any unrealized gains or losses are included in accumulated other comprehensive income/loss (“AOCI”) to the extent effective, and reclassified to cost of sales in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur.

Open foreign exchange cash flow hedges as of September 30, 2017 have maturities occurring over a period of 15 months, and have a net notional U.S. dollar equivalent of $196.5 million.

Interest Rate Swaps

As discussed in Note 5, on September 6, 2017, the Company issued the 2024 Term Loan B, which bears an interest rate of LIBOR plus 2.50%, subject to a 0.00% LIBOR floor. In order to reduce the variability in interest payments associated with the Company’s variable rate debt, during the third quarter of 2017, the Company entered into certain interest rate swap agreements to convert a portion of these variable rate borrowings into a fixed rate obligation. These interest rate swap agreements are designated as cash flow hedges, and as such, the contracts are marked-to-market at each reporting date and any unrealized gains or losses are included in AOCI to the extent effective, and reclassified to interest expense in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur.

As of September 30, 2017, the Company had open interest rate swap agreements with a net notional U.S. dollar equivalent of $200.0 million which had an effective date of September 29, 2017 and mature over a period of five years.

Net Investment Hedge

Through August 31, 2017, the Company had designated a portion (€280 million) of the original principal amount of the Company’s previous €375.0 million Euro Notes as a hedge of the foreign currency exposure of the Issuers’ net investment in certain European subsidiaries. Effective September 1, 2017, the Company de-designated the Euro Notes as a net investment hedge of the Issuers’ net investment in certain European subsidiaries, as the Euro Notes were redeemed on September 7, 2017 (refer to Note 5 for further information). Through the date of de-designation, this hedge was deemed to be highly effective, and changes in the Euro Notes’ carrying value resulting from fluctuations in the euro exchange rate were recorded as cumulative foreign currency translation loss of $24.1 million within AOCI as of September 30, 2017.

On August 29, 2017, the Issuers executed an indenture pursuant to which they issued the $500.0 million 5.375% 2025 Senior Notes (refer to Note 5 for further information). Subsequently, on September 1, 2017, the Company entered into certain fixed-for-fixed cross currency swaps (“CCS”), swapping USD principal and interest payments on the newly issued 2025 Senior Notes for euro-denominated payments. Under the terms of the CCS, the Company has notionally exchanged $500.0 million at an interest rate of 5.375% for €420 million at a weighted-average interest rate of 3.45% for approximately five years.

Effective September 1, 2017, the Company designated the full notional amount of the CCS (€420 million) as a hedge of the Issuers’ net investment in certain European subsidiaries. As the CCS were deemed to be highly effective hedges, changes in the fair value of the CCS were recorded as cumulative foreign currency translation loss of $7.1 million within AOCI as of September 30, 2017.

Summary of Derivative Instruments

Information regarding changes in the fair value of the Company’s derivative instruments, net of tax, including those not designated for hedge accounting treatment, is as follows:

	Gain (Loss) Recognized in				Gain (Loss) Recognized in
	AOCI on Balance Sheet				Statement of Operations
	Three Months Ended September 30,								Statement of Operations
	2017		2016		2017		2016		Classification
Designated as Cash Flow Hedges
Foreign exchange cash flow hedges	$	(4,458)	$	(2,280)	$	(2,666)	$	245	Cost of sales
Interest rate swaps		743		—		(6)		—	Interest expense, net
Total	$	(3,715)	$	(2,280)	$	(2,672)	$	245
Net Investment Hedges
Euro Notes	$	(13,924)	$	(2,128)	$	—	$	—
Cross-currency swaps (CCS)		(7,112)		—		—		—
Total	$	(21,036)	$	(2,128)	$	—	$	—
Not Designated as Cash Flow Hedges
Foreign exchange forward contracts	$	—	$	—	$	(6,526)	$	1,060	Other expense (income), net
Total	$	—	$	—	$	(6,526)	$	1,060

	Gain (Loss) Recognized in				Gain (Loss) Recognized in
	AOCI on Balance Sheet				Statement of Operations
	Nine Months Ended September 30,								Statement of Operations
	2017		2016		2017		2016		Classification
Designated as Cash Flow Hedges
Foreign exchange cash flow hedges	$	(22,234)	$	(3,676)	$	794	$	616	Cost of sales
Interest rate swaps		743		—		(6)		—	Interest expense, net
Total	$	(21,491)	$	(3,676)	$	788	$	616
Net Investment Hedges
Euro Notes	$	(38,584)	$	(4,615)	$	—	$	—
Cross-currency swaps (CCS)		(7,112)		—		—		—
Total	$	(45,696)	$	(4,615)	$	—	$	—
Not Designated as Cash Flow Hedges
Foreign exchange forward contracts	$	—	$	—	$	(17,036)	$	2,054	Other expense (income), net
Total	$	—	$	—	$	(17,036)	$	2,054

The Company recorded losses of $6.5 million and $17.0 million during the three and nine months ended September 30, 2017, respectively, and gains of $1.1 million and $2.1 million during the three and nine months ended September 30, 2016, respectively, from settlements and changes in the fair value of outstanding forward contracts (not designated as hedges). The gains and losses from these forward contracts offset net foreign exchange transaction gains of $8.2 million and $16.1 million during the three and nine months ended September 30, 2017, respectively, and losses of $1.5 million and $4.1 million during the three and nine months ended September 30, 2016, respectively, which resulted from the remeasurement of the Company’s foreign currency denominated assets and liabilities. The cash settlements of these foreign exchange forward contracts are included within operating activities in the condensed consolidated statement of cash flows.

As of September 30, 2017, the Company had no ineffectiveness related to its derivatives designated as hedging instruments. Further, the Company expects to reclassify in the next twelve months an approximate $10.3 million net loss from AOCI into earnings related to the Company’s outstanding foreign exchange cash flow hedges and interest rate swaps as of September 30, 2017 based on current foreign exchange rates.

The following table summarizes the net unrealized gains and losses and balance sheet classification of outstanding derivatives recorded in the condensed consolidated balance sheets:

	September 30, 2017										December 31, 2016
	Foreign Exchange		Foreign Exchange		Interest		Cross-				Foreign Exchange		Foreign Exchange
	Forward		Cash Flow		Rate		Currency				Forward		Cash Flow
Balance Sheet Classification	Contracts		Hedges		Swaps		Swaps		Total		Contracts		Hedges		Total
Asset Derivatives:
Accounts receivable, net of allowance	$	3,368	$	—	$	—	$	6,420	$	9,788	$	1,664	$	11,018	$	12,682
Deferred charges and other assets		—		—		1,432		—		1,432		—		—		—
Total asset derivatives	$	3,368	$	—	$	1,432	$	6,420	$	11,220	$	1,664	$	11,018	$	12,682
Liability Derivatives:
Accounts payable	$	117	$	9,612	$	688	$	—	$	10,417	$	511	$	—	$	511
Other noncurrent obligations		—		2,148		—		13,531		15,679		—		—		—
Total liability derivatives	$	117	$	11,760	$	688	$	13,531	$	26,096	$	511	$	—	$	511

Forward contracts, interest rate swaps, and cross currency swaps are entered into with a limited number of counterparties, each of which allows for net settlement of all contracts through a single payment in a single currency in the event of a default on or termination of any one contract. As such, in accordance with the Company’s accounting policy, we record these derivative instruments on a net basis by counterparty within the condensed consolidated balance sheet. Information regarding the gross amounts of the Company’s derivative instruments and the amounts offset in the condensed consolidated balance sheets is as follows:

	Gross Amounts		Gross Amounts		Net Amounts
	Recognized in the		Offset in the		Presented in the
	Balance Sheet		Balance Sheet		Balance Sheet
Balance at September 30, 2017
Derivative assets	$	12,793	$	(1,573)	$	11,220
Derivative liabilities		27,669		(1,573)		26,096
Balance at December 31, 2016
Derivative assets	$	23,401	$	(10,719)	$	12,682
Derivative liabilities		11,230		(10,719)		511

Refer to Notes 8 and 16 of the condensed consolidated financial statements for further information regarding the fair value of the Company’s derivative instruments and the related changes in AOCI.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2017

Fair Value Measurements

Fair Value Measurements

NOTE 8—FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities measured at fair value are classified using the following hierarchy, which is based upon the transparency of inputs to the valuation as of the measurement date.

Level 1—Valuation is based upon quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2—Valuation is based upon quoted prices for similar assets and liabilities in active markets, or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

Level 3—Valuation is based upon other unobservable inputs that are significant to the fair value measurement.

The following table summarizes the basis used to measure certain assets and liabilities at fair value on a recurring basis in the condensed consolidated balance sheets as of September 30, 2017 and December 31, 2016.

	September 30, 2017
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	3,368	$	—	$	3,368
Foreign exchange forward contracts—(Liabilities)		—		(117)		—		(117)
Foreign exchange cash flow hedges—(Liabilities)		—		(11,760)		—		(11,760)
Interest rate swaps—Assets		—		1,432		—		1,432
Interest rate swaps—(Liabilities)		—		(688)		—		(688)
Cross-currency swaps—Assets		—		6,420		—		6,420
Cross-currency swaps—(Liabilities)		—		(13,531)		—		(13,531)
Total fair value	$	—	$	(14,876)	$	—	$	(14,876)

	December 31, 2016
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	1,664	$	—	$	1,664
Foreign exchange forward contracts—(Liabilities)		—		(511)		—		(511)
Foreign exchange cash flow hedges—Assets		—		11,018		—		11,018
Total fair value	$	—	$	12,171	$	—	$	12,171

The Company uses an income approach to value its derivative instruments, utilizing discounted cash flow techniques, considering the terms of the contract and observable market information available as of the reporting date, such as interest rate yield curves and currency spot and forward rates. Significant inputs to the valuation for these derivative instruments are obtained from broker quotations or from listed or over-the-counter market data, and are classified as Level 2 in the fair value hierarchy.

Fair Value of Debt Instruments

The following table presents the estimated fair value of the Company’s outstanding debt not carried at fair value as of September 30, 2017 and December 31, 2016, respectively:

	As of		As of
	September 30, 2017		December 31, 2016
2025 Senior Notes	$	515,625	$	—
2022 Senior Notes
USD Notes		—		315,000
Euro Notes		—		424,437
2024 Term Loan B		707,441		—
2021 Term Loan B		—		498,041
Total fair value	$	1,223,066	$	1,237,478

The fair value of the Company’s debt facilities above (each Level 2 securities) is determined using over-the-counter market quotes and benchmark yields received from independent vendors.

There were no other significant financial instruments outstanding as of September 30, 2017 and December 31, 2016.

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Income Taxes

9 Months Ended

Sep. 30, 2017

Provision for Income Taxes

Income Taxes

NOTE 9—PROVISION FOR INCOME TAXES

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2017			2016			2017			2016
Effective income tax rate		20.0	%		19.2	%		21.1	%		21.7	%

Provision for income taxes for the three and nine months ended September 30, 2017 were $8.3 million, resulting in an effective tax rate of 20.0%, and $56.4 million, resulting in an effective tax rate of 21.1%, respectively. Provision for income taxes for the three and nine months ended September 30, 2016 were $16.0 million, resulting in an effective tax rate of 19.2%, and $66.5 million, resulting in an effective tax rate of 21.7%, respectively.

While the effective tax rate for the three and nine months ended September 30, 2017 and 2016 remained relatively consistent, the rate was impacted by non-recurring items in both periods. 

The effective tax rate for the three and nine months ended September 30, 2017 was impacted by payments made of $10.9 million related to a portion of the fees associated with the call premium paid to retire the Company’s 2022 Senior Notes, which are not anticipated to provide a tax benefit to the Company in the future (refer to Note 5 for further information). The effective tax rate for the three and nine months ended September 30, 2016 was impacted by an impairment charge of $0.3 million and $13.2 million, respectively, for the estimated loss on sale of Trinseo Brazil. Refer to Note 13 for further information.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure

Commitments and Contingencies

NOTE 10—COMMITMENTS AND CONTINGENCIES

Environmental Matters

Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated, based on current law, existing technologies and other information. Pursuant to the terms of the agreement associated with the Company’s formation, the pre-closing environmental conditions were retained by Dow and Dow has agreed to indemnify the Company from and against all environmental liabilities incurred or relating to the predecessor periods. No environmental claims have been asserted or threatened against the Company, and the Company is not a potentially responsible party at any Superfund Sites. As of September 30, 2017 and December 31, 2016, the Company had no accrued obligations for environmental remediation and restoration costs.

Inherent uncertainties exist in the Company’s potential environmental liabilities primarily due to unknown conditions, whether future claims may fall outside the scope of the indemnity, changing governmental regulations and legal standards regarding liability, and evolving technologies for handling site remediation and restoration. In connection with the Company’s existing indemnification, the possibility is considered remote that environmental remediation costs will have a material adverse impact on the condensed consolidated financial statements.

Purchase Commitments

In the normal course of business, the Company has certain raw material purchase contracts where it is required to purchase certain minimum volumes at current market prices. These commitments range from 1 to 5 years. In certain raw material purchase contracts, the Company has the right to purchase less than the required minimums and pay a liquidated damages fee, or, in case of a permanent plant shutdown, to terminate the contracts. In such cases, these obligations would be less than the annual commitment as disclosed in the consolidated financial statements included in the Annual Report.

Litigation Matters

From time to time, the Company may be subject to various legal claims and proceedings incidental to the normal conduct of business, relating to such matters as product liability, antitrust/competition, past waste disposal practices and release of chemicals into the environment. While it is impossible at this time to determine with certainty the ultimate outcome of these routine claims, the Company does not believe that the ultimate resolution of these claims will have a material adverse effect on the Company’s results of operations, financial condition or cash flow. Legal costs, including those legal costs expected to be incurred in connection with a loss contingency, are expensed as incurred.

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Pension Plans and Other Postretirement Benefits

9 Months Ended

Sep. 30, 2017

Pension Plans and Other Postretirement Benefits

Pension Plans and Other Postretirement Benefits

NOTE 11—PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

The components of net periodic benefit costs for all significant plans were as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Defined Benefit Pension Plans
Service cost	$	5,000	$	4,156	$	14,291	$	12,438
Interest cost		1,184		1,391		3,376		4,160
Expected return on plan assets		(450)		(492)		(1,285)		(1,474)
Amortization of prior service credit		(503)		(488)		(1,456)		(1,459)
Amortization of net loss		1,479		1,058		4,232		3,169
Net settlement and curtailment loss(1)		—		—		129		—
Net periodic benefit cost	$	6,710	$	5,625	$	19,287	$	16,834

(1) Represents a settlement loss of approximately $0.5 million triggered by benefit payments exceeding the sum of service and interest cost for one of the Company’s pension plans in Switzerland, partially offset by a curtailment gain of approximately $0.4 million related to a reduction in the number of participants in the Company’s pension plan in Japan.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Other Postretirement Plans
Service cost	$	53	$	67	$	161	$	196
Interest cost		63		135		189		385
Amortization of prior service cost		26		25		77		77
Amortization of net gain		(11)		(43)		(32)		(128)
Net periodic benefit cost	$	131	$	184	$	395	$	530

As of September 30, 2017 and December 31, 2016, the Company’s benefit obligations included primarily in “Other noncurrent obligations” in the condensed consolidated balance sheets were $221.6 million and $195.8 million, respectively. The net periodic benefit costs are recognized in the condensed consolidated statement of operations as “Cost of sales” and “Selling, general and administrative expenses.”

The Company made cash contributions and benefit payments to unfunded plans of approximately $1.7 million and $11.9 million during the three and nine months ended September 30, 2017, respectively. The Company expects to make additional cash contributions, including benefit payments to unfunded plans, of approximately $4.0 million to its defined benefit plans for the remainder of 2017.

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Stock-Based Compensation

9 Months Ended

Sep. 30, 2017

Stock-Based Compensation

Stock-Based Compensation

NOTE 12—STOCK-BASED COMPENSATION

Refer to the Annual Report for definitions of capitalized terms not included herein and further background on the Company’s stock-based compensation programs included in the tables below.  

The following table summarizes the Company’s stock-based compensation expense for the three and nine months ended September 30, 2017 and 2016, as well as unrecognized compensation cost as of September 30, 2017:

									As of
	Three Months Ended				Nine Months Ended				September 30, 2017
	September 30,				September 30,				Unrecognized		Weighted
	2017		2016		2017		2016		Compensation Cost		Average Years
RSUs	$	2,287	$	1,476	$	6,295	$	3,826	$	11,682	1.8
Options		454		733		3,661		4,867		1,659	1.4
PSUs		324		—		796		—		3,062	2.4
Restricted Stock Awards issued by Former Parent		—		3,817		—		6,149		—	—
Total Stock-based Compensation Expense	$	3,065	$	6,026	$	10,752	$	14,842

The following table summarizes awards granted and the respective weighted-average grant date fair value for the nine months ended September 30, 2017:

	Nine Months Ended
	September 30, 2017
	Awards Granted		Weighted Average Grant Date Fair Value per Award
RSUs		110,767	$	70.85
Options		192,546		20.61
PSUs		50,937		75.74

Option Awards

The following are the weighted-average assumptions used within the Black-Scholes pricing model for the Company’s option awards granted during the nine months ended September 30, 2017:

	Nine Months Ended
	September 30,
	2017
Expected term (in years)	5.50
Expected volatility	35.00	%
Risk-free interest rate	2.19	%
Dividend yield	2.00	%

Since the Company’s equity interests were privately held prior to its initial public offering (“IPO”) in June 2014, there is limited publicly available trading history of the Company’s ordinary shares. Until such time that the Company can determine expected volatility based solely on the publicly traded history of its ordinary shares, expected volatility used in the Black-Scholes model for option awards granted is based on a combination of the Company’s historical volatility and similar companies’ stock that are publicly traded. The expected term of option awards represents the period of time that option awards granted are expected to be outstanding. For the option awards granted during the nine months ended September 30, 2017, the simplified method was used to calculate the expected term, given the Company’s limited historical exercise data. The risk-free interest rate for the periods within the expected term of option awards is based on the U.S. Treasury yield curve in effect at the time of grant. The dividend yield is estimated based on historical and expected dividend activity.

Performance Share Units (PSUs)

The Company granted PSUs for the first time during the nine months ended September 30, 2017. The PSUs, which are granted to executives, cliff vest on the third anniversary of the date of grant, generally subject to the executive remaining continuously employed by the Company through the vesting date and achieving certain performance conditions. The number of the PSUs that vest upon completion of the service period can range from 0 to 200 percent of the original grant, subject to certain limitations, contingent upon the Company’s total shareholder return (“TSR”) during the performance period relative to a pre-defined set of industry peer companies. Upon a termination of employment due to the executive’s death or retirement, or termination in connection with a change in control or other factors prior to the vesting date, the PSUs will vest in full or in part, depending on the type of termination and the achievement of the performance conditions. Dividend equivalents will accumulate on PSUs during the vesting period, will be paid in cash upon vesting, and do not accrue interest. When PSUs vest, shares will be issued from the existing pool of treasury shares. The fair value for PSU awards is computed using a Monte Carlo valuation model.

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Acquisitions and Divestitures

9 Months Ended

Sep. 30, 2017

Acquisitions and Divestitures

Acquisitions and Divestitures

NOTE 13—ACQUISITIONS AND DIVESTITURES

Acquisition of API Plastics

On July 10, 2017, the Company acquired 100% of the equity interests of API Applicazioni Plastiche Industriali S.p.A, or API Plastics, a privately held company. The gross purchase price for the acquisition was $90.5 million, inclusive of $8.4 million of cash acquired, yielding a net purchase price of $82.1 million. These amounts are subject to certain customary post-closing adjustments. During the nine months ended September 30, 2017, the Company paid $79.7 million for this acquisition, leaving an additional $2.4 million of unpaid purchase price accrued, which is expected to be paid during the fourth quarter of 2017. API Plastics, based in Mussolente, Italy, is a manufacturer of soft-touch polymers and bioplastics, such as thermoplastic elastomers (“TPEs”). TPEs can be molded over rigid plastics such as ABS and PC/ABS, which presents opportunities for complementary technology product offerings within our Performance Plastics segment. The acquisition was funded through existing cash on hand.

The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The excess of the purchase price over the aggregate fair values was recorded as goodwill. The Company calculated the fair value of the assets acquired using the income and cost approaches (or a combination thereof). Fair values were determined based on Level 3 inputs including estimated future cash flows, discount rates, royalty rates, growth rates, sales projections, retention rates and terminal values, all of which require significant management judgment.

The purchase price allocation is based upon preliminary information and is subject to change if additional information about the facts and circumstances that existed at the acquisition date becomes available. Additional information is being gathered to finalize these preliminary measurements, particularly with respect to property, plant and equipment, intangible assets, inventory, deferred income taxes and income taxes payable. Further adjustments may be necessary as a result of the Company’s on-going assessment of additional information related to the fair value of assets acquired and liabilities assumed, including goodwill, during the measurement period.

The following table summarizes the preliminary fair value measurement of the assets acquired and liabilities assumed as of the date of acquisition:

	July 10,
	2017
Cash and cash equivalents	$	8,431
Accounts receivable		16,484
Inventories		10,282
Other current assets		728
Property, plant, and equipment		24,146
Other intangible assets(1)
Customer relationships		14,000
Developed technology		11,500
Other amortizable intangible assets		2,700
Total fair value of assets acquired	$	88,271
Accounts payable	$	12,219
Income taxes payable		202
Accrued expenses and other current liabilities		1,416
Deferred income tax liabilities—noncurrent		11,262
Other noncurrent obligations		1,277
Total fair value of liabilities assumed	$	26,376
Net identifiable assets acquired	$	61,895
Goodwill(2)		28,598
Net assets acquired	$	90,493

(1) The expected lives of the acquired intangible assets are 19 years for customer relationships, 9 years for developed technology, and 3 years for other amortizable intangible assets.

(2) Goodwill consists of expected operating synergies resulting from combining API Plastics with our existing businesses, and is allocated entirely to the Performance Plastics segment. None of the goodwill related to this acquisition will be deductible for income tax purposes.

During the three and nine months ended September 30, 2017, transaction and integration costs related to advisory and professional fees incurred in conjunction with the API Plastics acquisition were $2.4 million and $3.5 million, respectively, and were included within “Selling, general and administrative expenses” in the condensed consolidated statement of operations. Additionally, during the three and nine months ended September 30, 2017, the Company recorded a $1.3 million non-cash fair value inventory adjustment related to the API Plastics acquisition which was included within “Cost of sales” in the condensed consolidated statement of operations.

Pro forma results of operations information has not been presented, as the effect of the API Plastics acquisition is not material. The operating results of API Plastics are included within the Company's condensed consolidated statement of operations since the acquisition date of July 10, 2017 and were not material to the Company's results for the three and nine months ended September 30, 2017.

Divestiture of Brazil Business

During the second quarter of 2016, the Company signed a definitive agreement to sell Trinseo do Brasil Comercio de Produtos Quimicos Ltda. (“Trinseo Brazil”), its primary operating entity in Brazil, including both a latex binders and automotive business. The sale closed on October 1, 2016.

As a result of this agreement, during the three and nine months ended September 30, 2016, the Company recorded impairment charges for the estimated loss on sale of approximately $0.3 million, and $13.2 million, respectively, within “Other expense (income), net” in the condensed consolidated statement of operations. The $13.2 million charge was allocated as $8.4 million, $4.2 million, and $0.6 million to the Performance Plastics segment, Latex Binders segment, and Corporate, respectively. During the year ended December 31, 2016, the Company received $1.8 million in proceeds from the sale of these businesses, with an additional $1.7 million received during the nine months ended September 30, 2017.

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Segments

9 Months Ended

Sep. 30, 2017

Segments

Segments

NOTE 14—SEGMENTS

Effective October 1, 2016, the Company realigned its reporting segments to reflect the new model under which the business is managed and results are reviewed by the chief executive officer, who is the Company’s chief operating decision maker. This change in segments was made to provide increased clarity and understanding around the indicators of profitability and cash flow of the Company. The previous Basic Plastics & Feedstocks segment was split into three new segments: Basic Plastics, which includes polystyrene, copolymers, and polycarbonate; Feedstocks, which represents the Company’s styrene monomer business; and Americas Styrenics, which reflects the equity earnings from its 50%-owned styrenics joint venture. In addition, certain highly differentiated acrylonitrile-butadiene-styrene, or ABS, supplied into Performance Plastics markets, which was previously included in the results of Basic Plastics & Feedstocks, is now included in Performance Plastics. Finally, the Latex segment was renamed to Latex Binders. In conjunction with the segment realignment, the Company also changed its primary measure of segment operating performance from EBITDA to Adjusted EBITDA. Refer to the discussion below for further information about Adjusted EBITDA.

The information in the tables below has been retroactively adjusted to reflect the changes in reporting segments and segment operating performance.

The Latex Binders segment produces styrene-butadiene latex, or SB latex, and other latex polymers and binders, primarily for coated paper and packaging board, carpet and artificial turf backings, as well as a number of performance latex binders applications, such as adhesive, building and construction and the technical textile paper market. The Synthetic Rubber segment produces synthetic rubber products used predominantly in high-performance tires, impact modifiers and technical rubber products, such as conveyer belts, hoses, seals and gaskets. The Performance Plastics segment produces highly engineered compounds and blends and some specialized ABS grades for automotive end markets, as well as consumer electronics, medical, electrical and lighting, collectively consumer essential markets, or CEM. The Basic Plastics segment produces styrenic polymers, including polystyrene, basic ABS, and styrene-acrylonitrile, or SAN, products, as well as polycarbonate, or PC, all of which are used as inputs in a variety of end use markets. The Basic Plastics segment also included the results of our previously 50%-owned joint venture, Sumika Styron Polycarbonate, until the Company sold its share in the entity in January 2017 (refer to Note 3 for further information). The Feedstocks segment includes the Company’s production and procurement of styrene monomer outside of North America, which is used as a key raw material in many of the Company’s products, including polystyrene, SB latex, ABS resins, solution styrene-butadiene rubber, or SSBR, etc. Lastly, the Americas Styrenics segment consists solely of the operations of our 50%-owned joint venture, Americas Styrenics, a producer of both styrene monomer and polystyrene in North America.

Asset, capital expenditure, and intersegment sales information is not reviewed or included with the Company’s reporting to the chief operating decision maker. Therefore, the Company has not disclosed this information for each reportable segment.

	Performance Materials						Basic Plastics & Feedstocks
	Latex		Synthetic		Performance		Basic				Americas		Corporate
Three Months Ended	Binders		Rubber		Plastics		Plastics		Feedstocks		Styrenics		Unallocated		Total
September 30, 2017
Sales to external customers	$	266,260	$	118,684	$	206,999	$	393,622	$	111,017	$	—	$	—	$	1,096,582
Equity in earnings of unconsolidated affiliates		—		—		—		—		—		43,807		—		43,807
Adjusted EBITDA(1)		32,343		(5,579)		29,436		42,062		45,597		43,807
Investment in unconsolidated affiliates		—		—		—		—		—		161,883		—		161,883
Depreciation and amortization		6,046		8,960		4,102		4,274		3,603		—		2,191		29,176
September 30, 2016
Sales to external customers	$	242,600	$	112,690	$	175,355	$	323,729	$	81,036	$	—	$	—	$	935,410
Equity in earnings of unconsolidated affiliates		—		—		—		2,356		—		34,330		—		36,686
Adjusted EBITDA(1)		29,815		28,491		30,187		34,134		12,729		34,330
Investment in unconsolidated affiliates		—		—		—		38,197		—		148,802		—		186,999
Depreciation and amortization		5,742		9,138		1,372		4,057		2,446		—		1,016		23,771

	Performance Materials						Basic Plastics & Feedstocks
	Latex		Synthetic		Performance		Basic				Americas		Corporate
Nine Months Ended	Binders		Rubber		Plastics		Plastics		Feedstocks		Styrenics		Unallocated		Total
September 30, 2017
Sales to external customers	$	846,721	$	456,055	$	581,724	$	1,156,831	$	304,940	$	—	$	—	$	3,346,271
Equity in earnings (losses) of unconsolidated affiliates		—		—		—		810		—		92,219		—		93,029
Adjusted EBITDA(1)		105,228		68,381		79,799		112,691		86,342		92,219
Investment in unconsolidated affiliates		—		—		—		—		—		161,883		—		161,883
Depreciation and amortization		17,469		26,027		8,947		12,094		9,172		—		6,511		80,220
September 30, 2016
Sales to external customers	$	684,552	$	326,278	$	527,875	$	1,029,683	$	230,800	$	—	$	—	$	2,799,188
Equity in earnings (losses) of unconsolidated affiliates		—		—		—		5,375		—		104,939		—		110,314
Adjusted EBITDA(1)		70,042		81,787		103,745		115,050		66,087		104,939
Investment in unconsolidated affiliates		—		—		—		38,197		—		148,802		—		186,999
Depreciation and amortization		17,904		26,073		4,505		11,581		8,071		—		3,610		71,744

(1)The Company’s primary measure of segment operating performance is Adjusted EBITDA, which is defined as income from continuing operations before interest expense, net; provision for income taxes; depreciation and amortization expense; loss on extinguishment of long-term debt; asset impairment charges; gains or losses on the dispositions of businesses and assets; restructuring; acquisition related costs and other items. Adjusted EBITDA is a key metric that is used by management to evaluate business performance in comparison to budgets, forecasts, and prior year financial results, providing a measure that management believes reflects core operating performance by removing the impact of transactions and events that would not be considered a part of core operations. Adjusted EBITDA is useful for analytical purposes; however, it should not be considered an alternative to the Company’s reported GAAP results, as there are limitations in using such financial measures. Other companies in the industry may define Adjusted EBITDA differently than the Company, and as a result, it may be difficult to use Adjusted EBITDA, or similarly named financial measures, that other companies may use to compare the performance of those companies to the Company’s segment performance.

The reconciliation of income before income taxes to Segment Adjusted EBITDA is as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Income before income taxes	$	41,515	$	83,254	$	267,068	$	306,305
Interest expense, net		18,436		18,832		55,355		56,542
Depreciation and amortization		29,176		23,771		80,220		71,744
Corporate Unallocated(2)		21,864		26,397		70,888		72,766
Adjusted EBITDA Addbacks(3)		76,675		17,432		71,129		34,293
Segment Adjusted EBITDA	$	187,666	$	169,686	$	544,660	$	541,650

(2)Corporate unallocated includes corporate overhead costs and certain other income and expenses.

(3)Adjusted EBITDA addbacks for the three and nine months ended September 30, 2017 and 2016 are as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in millions)	2017		2016		2017		2016
Loss on extinguishment of long-term debt (Note 5)	$	65.3	$	—	$	65.3	$	—
Net loss (gain) on disposition of businesses and assets (Notes 3 and 13)		0.2		0.3		(9.7)		13.2
Restructuring and other charges (Note 15)		1.5		16.8		4.8		18.6
Acquisition transaction and integration costs (Note 13)		3.8		—		4.9		—
Asset impairment charges or write-offs(a)		4.3		—		4.3		—
Other items(b)		1.6		0.3		1.6		2.5
Total Adjusted EBITDA Addbacks	$	76.7	$	17.4	$	71.2	$	34.3

(a) Asset impairment charges for the three and nine months ended September 30, 2017 primarily relate to the impairment of certain long-lived assets in the Company’s Performance Plastics segment.

(b) Other items for the three and nine months ended September 30, 2017 primarily relate to fees incurred in conjunction with the Company’s debt refinancing which was completed during the third quarter of 2017 (refer to Note 5 for further information). Other items for the three and nine months ended September 30, 2016 primarily relate to fees incurred in conjunction with the Company’s secondary offerings completed during these periods.

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Restructuring

9 Months Ended

Sep. 30, 2017

Restructuring

Restructuring

NOTE 15—RESTRUCTURING

Refer to the Annual Report for details regarding the Company’s previously announced restructuring activities included in the tables below. New restructuring activities are discussed in greater detail below. Restructuring charges are included within “Selling, general and administrative expenses” in the condensed consolidated statement of operations.

The following table provides detail of the Company’s restructuring charges for the three and nine months ended September 30, 2017 and 2016:

	Three Months Ended				Nine Months Ended				Cumulative
	September 30,				September 30,				Life-to-date
	2017		2016		2017		2016		Charges		Segment
Terneuzen Compounding Restructuring(1)
Asset impairment/accelerated depreciation	$	614	$	—	$	1,745	$	—	$	1,745
Employee termination benefits		170		—		326		—		326
Contract terminations		—		—		590		—		590
Decommissioning and other		192		—		192		—		818
Terneuzen Subtotal	$	976	$	—	$	2,853	$	—	$	3,479	Performance Plastics
Livorno Plant Restructuring(2)
Asset impairment/accelerated depreciation	$	—	$	14,345	$	—	$	14,345	$	14,345
Employee termination benefits		220		1,405		579		1,405		5,211
Contract terminations		—		269		—		269		269
Decommissioning and other		633		64		1,695		64		2,372
Livorno Subtotal	$	853	$	16,083	$	2,274	$	16,083	$	22,197	Latex Binders
Other Restructurings		288		759		1,453		2,989			Various
Total Restructuring Charges	$	2,117	$	16,842	$	6,580	$	19,072

(1) In March 2017, the Company announced plans to upgrade its production capability for compounded resins with the construction of a new state-of-the art compounding facility to replace its existing compounding facility in Terneuzen, The Netherlands. The new facility is expected to start up by the end of 2018, with substantive production at the existing facility expected to cease by December 2018, followed by decommissioning activities in 2019. The Company expects to incur incremental accelerated depreciation charges of approximately $1.9 million through the end of 2018, as well as estimated decommissioning and other charges of approximately $1.2 million throughout 2019, the majority of which are expected to be paid in late 2018 and throughout 2019.

(2) In August 2016, the Company announced its plan to cease manufacturing activities at its latex binders manufacturing facility in Livorno, Italy. The Company expects to incur incremental employee termination benefit charges of $0.2 million throughout 2017, which are expected to be paid in early 2018. The Company also expects to incur additional decommissioning costs associated with this plant shutdown in 2017, the cost of which will be expensed as incurred.

The following table provides a rollforward of the liability balances associated with the Company’s restructuring activities as of September 30, 2017. Employee termination benefit and contract termination charges are recorded within “Accrued expenses and other current liabilities” in the condensed consolidated balance sheet.

	Balance at						Balance at
	December 31, 2016		Expenses		Deductions(1)		September 30, 2017
Employee termination benefits	$	5,021	$	2,492	$	(5,674)	$	1,839
Contract terminations		269		590		(122)		737
Decommissioning and other		—		2,474		(2,474)		—
Total	$	5,290	$	5,556	$	(8,270)	$	2,576

(1) Includes primarily payments made against the existing accrual, as well as immaterial impacts of foreign currency remeasurement.

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Accumulated Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2017

Shareholders' Equity.

Accumulated Other Comprehensive Income (Loss)

NOTE 16—ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The components of AOCI, net of income taxes, consisted of:

	Cumulative		Pension & Other
	Translation		Postretirement Benefit			Cash Flow
Three Months Ended  September 30, 2017 and 2016	Adjustments		Plans, Net			Hedges, Net	Total
Balance as of June 30, 2017	$	(95,747)	$	(61,332)	$	(5,504)	$	(162,583)
Other comprehensive income (loss)		(1,561)		—		(6,387)		(7,948)
Amounts reclassified from AOCI to net income (1)		—		840		2,672		3,512
Balance as of September 30, 2017	$	(97,308)	$	(60,492)	$	(9,219)	$	(167,019)
Balance as of June 30, 2016	$	(106,702)	$	(45,887)	$	4,173	$	(148,416)
Other comprehensive income (loss)		1,488		—		(2,035)		(547)
Amounts reclassified from AOCI to net income (1)		—		533		(245)		288
Balance as of September 30, 2016	$	(105,214)	$	(45,354)	$	1,893	$	(148,675)

	Cumulative		Pension & Other
	Translation		Postretirement Benefit		Cash Flow
Nine Months Ended  September 30, 2017 and 2016	Adjustments		Plans, Net		Hedges, Net		Total
Balance as of December 31, 2016	$	(118,922)	$	(63,504)	$	12,272	$	(170,154)
Other comprehensive income (loss)		21,614		—		(20,703)		911
Amounts reclassified from AOCI to net income (1)		—		3,012		(788)		2,224
Balance as of September 30, 2017	$	(97,308)	$	(60,492)	$	(9,219)	$	(167,019)
Balance as of December 31, 2015	$	(109,120)	$	(46,166)	$	5,569	$	(149,717)
Other comprehensive income (loss)		3,906		(800)		(3,060)		46
Amounts reclassified from AOCI to net income (1)		—		1,612		(616)		996
Balance as of September 30, 2016	$	(105,214)	$	(45,354)	$	1,893	$	(148,675)

(1) The following is a summary of amounts reclassified from AOCI to net income for the three and nine months ended September 30, 2017 and 2016, respectively:

	Amount Reclassified from AOCI				Amount Reclassified from AOCI
AOCI Components	Three Months Ended  September 30,				Nine Months Ended  September 30,				Statement of Operations
	2017		2016		2017		2016		Classification
Cash flow hedging items
Foreign exchange cash flow hedges	$	2,666	$	(245)	$	(794)	$	(616)	Cost of sales
Interest rate swaps		6		—		6		—	Interest expense, net
Total before tax		2,672		(245)		(788)		(616)
Tax effect		—		—		—		—	Provision for income taxes
Total, net of tax	$	2,672	$	(245)	$	(788)	$	(616)
Amortization of pension and other postretirement benefit plan items
Prior service credit	$	(477)	$	(461)	$	(1,379)	$	(1,382)	(a)
Net actuarial loss		1,697		1,250		4,886		3,770	(a)
Net settlement and curtailment loss		—		—		648		—	(a)
Total before tax		1,220		789		4,155		2,388
Tax effect		(380)		(256)		(1,143)		(776)	Provision for income taxes
Total, net of tax	$	840	$	533	$	3,012	$	1,612

(a) These AOCI components are included in the computation of net periodic benefit costs (see Note 11).

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Earnings Per Share

9 Months Ended

Sep. 30, 2017

Earnings Per Share

Earnings Per Share

NOTE 17—EARNINGS PER SHARE

Basic earnings per ordinary share (“basic EPS”) is computed by dividing net income available to ordinary shareholders by the weighted average number of the Company’s ordinary shares outstanding for the applicable period. Diluted earnings per ordinary share (“diluted EPS”) is calculated using net income available to ordinary shareholders divided by diluted weighted-average ordinary shares outstanding during each period, which includes unvested RSUs, option awards, and PSUs. Diluted EPS considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential ordinary shares would have an anti-dilutive effect.

The following table presents basic EPS and diluted EPS for the three and nine months ended September 30, 2017 and 2016, respectively.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands, except per share data)	2017		2016		2017		2016
Earnings:
Net income	$	33,215	$	67,254	$	210,668	$	239,805
Shares:
Weighted-average ordinary shares outstanding		43,745		45,865		43,900		47,152
Dilutive effect of RSUs, option awards, and PSUs		1,037		1,096		1,146		889
Diluted weighted-average ordinary shares outstanding		44,782		46,961		45,046		48,041
Income per share:
Income per share—basic	$	0.76	$	1.47	$	4.80	$	5.09
Income per share—diluted	$	0.74	$	1.43	$	4.68	$	4.99

* Refer to Note 12 for discussion of RSUs, option awards, and PSUs granted to certain Company directors and employees. The number of anti-dilutive shares that have been excluded in the computation of diluted earnings per share were 0.2 million for the both the three and nine months ended September 30, 2017, respectively, and zero for both the three and nine months ended September 30, 2016, respectively.

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Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2017

Basis of Presentation.

Basis of Presentation

The unaudited interim condensed consolidated financial statements of Trinseo S.A. and its subsidiaries (the “Company”) as of and for the periods ended September 30, 2017 and 2016 were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and reflect all adjustments, consisting only of normal recurring adjustments, which, in the opinion of management, are considered necessary for the fair statement of the results for the periods presented. Because they cover interim periods, the statements and related notes to the financial statements do not include all disclosures normally provided in annual financial statements and, therefore, these statements should be read in conjunction with the 2016 audited consolidated financial statements included within the Company’s Annual Report on Form 10-K (“Annual Report”) filed with the Securities and Exchange Commission (“SEC”) on March 1, 2017.

The December 31, 2016 condensed consolidated balance sheet data presented herein was derived from the Company’s December 31, 2016 audited consolidated financial statements, but does not include all disclosures required by GAAP for annual periods.

Certain prior year amounts have been reclassified to conform to the current period presentation. These reclassifications did not have a material impact on the Company’s financial position or results. Refer to Note 14 for further information.

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Investments in Unconsolidated Affiliates (Tables)

9 Months Ended

Sep. 30, 2017

Investments in Unconsolidated Affiliates

Summarized Financial Information of Unconsolidated Affiliates

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Sales	$	458,744	$	460,305	$	1,369,572	$	1,241,908
Gross profit	$	90,594	$	84,095	$	176,352	$	240,366
Net income	$	81,059	$	65,041	$	141,508	$	188,853

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Inventories (Tables)

9 Months Ended

Sep. 30, 2017

Inventories

Schedule of Inventories

	September 30,		December 31,
	2017		2016
Finished goods	$	239,663	$	187,577
Raw materials and semi-finished goods		211,186		168,804
Supplies		32,309		28,964
Total	$	483,158	$	385,345

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Debt (Tables)

9 Months Ended

Sep. 30, 2017

Debt

Schedule of Debt

			September 30, 2017
	Interest Rate as of September 30, 2017	Maturity Date	Carrying Amount		Unamortized Deferred Financing Fees(1)		Total Debt, Less Unamortized Deferred Financing Fees
Senior Credit Facility
2022 Revolving Facility(2)	Various	September 2022	$	—	$	—	$	—
2024 Term Loan B(3)	3.735%	September 2024		700,000		(18,957)		681,043
2025 Senior Notes	5.375%	September 2025		500,000		(9,600)		490,400
Accounts Receivable Securitization Facility(4)	Various	May 2019		—		—		—
Other indebtedness	Various	Various		1,481		—		1,481
Total debt			$	1,201,481	$	(28,557)	$	1,172,924
Less: current portion								(7,000)
Total long-term debt, net of unamortized deferred financing fees							$	1,165,924

			December 31, 2016
	Interest Rate as of December 31, 2016	Maturity Date	Carrying Amount		Unamortized Deferred Financing Fees(1)		Total Debt, Less Unamortized Deferred Financing Fees
2020 Senior Credit Facility
2020 Revolving Facility	Various	May 2020	$	—	$	—	$	—
2021 Term Loan B	4.250%	November 2021		491,545		(9,159)		482,386
2022 Senior Notes
USD Notes	6.750%	May 2022		300,000		(5,726)		294,274
Euro Notes	6.375%	May 2022		394,275		(7,157)		387,118
Accounts Receivable Securitization Facility	Various	May 2019		—		—		—
Other indebtedness	Various	Various		1,591		—		1,591
Total debt			$	1,187,411	$	(22,042)	$	1,165,369
Less: current portion								(5,000)
Total long-term debt, net of unamortized deferred financing fees							$	1,160,369

(1) This caption does not include deferred financing fees related to the Company’s revolving facilities, which are included within “Deferred charges and other assets” on the condensed consolidated balance sheets.

(2) The Company had $357.2 million (net of $17.8 million outstanding letters of credit) of funds available for borrowing under this facility as of September 30, 2017. Additionally, the Company is required to pay a quarterly commitment fee in respect of any unused commitments under this facility equal to 0.375% per annum.

(3) The 2024 Term Loan B bears an interest rate of LIBOR plus 2.50%, subject to a 0.00% LIBOR floor. As of September 30, 2017, $7.0 million of the scheduled future payments related to this facility were classified as current debt on the Company’s condensed consolidated balance sheet.

(4) This facility has a borrowing capacity of $200.0 million. As of September 30, 2017, the Company had approximately $148.8 million of accounts receivable available to support this facility, based on the pool of eligible accounts receivable. In regards to outstanding borrowings, fixed interest charges are 2.6% plus variable commercial paper rates, while for available, but undrawn commitments, fixed interest charges are 1.4%.

Redemption Price as Percentage of Principal Amount to Applicable Date of Redemption

12-month period commencing September 1 in Year	Percentage
2020	102.688	%
2021	101.792	%
2022	100.896	%
2023 and thereafter	100.000	%

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Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets.

Changes in Carrying Amount of Goodwill, by Segment

	Performance Materials						Basic Plastics & Feedstocks
	Latex		Synthetic		Performance		Basic				Americas
	Binders		Rubber		Plastics		Plastics		Feedstocks		Styrenics		Total
Balance at December 31, 2016	$	11,544	$	8,177	$	4,210	$	5,554	$	—	$	—	$	29,485
Acquisition (Note 13)		—		—		28,598		—		—		—		28,598
Foreign currency impact		1,415		1,002		1,592		682		—		—		4,691
Balance at September 30, 2017	$	12,959	$	9,179	$	34,400	$	6,236	$	—	$	—	$	62,774

Schedule of Other Intangible Assets

		September 30, 2017						December 31, 2016
	Estimated	Gross						Gross
	Useful Life	Carrying		Accumulated				Carrying		Accumulated
	(Years)	Amount		Amortization		Net		Amount		Amortization		Net
Developed technology(1)	9 - 15	$	198,535	$	(91,078)	$	107,457	$	166,230	$	(72,159)	$	94,071
Customer Relationships(1)	19		14,520		(171)		14,349		—		—		—
Manufacturing Capacity Rights	6		22,426		(12,728)		9,698		19,977		(8,908)		11,069
Software	5 - 10		87,412		(22,617)		64,795		82,275		(15,095)		67,180
Software in development	N/A		8,617		—		8,617		4,751		—		4,751
Other(1)	3		3,056		(153)		2,903		274		—		274
Total		$	334,566	$	(126,747)	$	207,819	$	273,507	$	(96,162)	$	177,345

(1) Balances as of September 30, 2017 include assets acquired related to the acquisition of API Applicazioni Plastiche Industriali S.p.A (“API Plastics”). Refer to Note 13 for further information.

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Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2017

Derivative Instruments [Abstract]

Notional Amounts of Most Significant Net Foreign Exchange Hedge Positions Outstanding

	September 30,
Buy / (Sell)	2017
Euro	$	(161,885)
Chinese Yuan	$	(58,335)
Indonesian Rupiah	$	(29,493)
Swiss Franc	$	16,762
Korean Won	$	(10,983)

Schedule of Changes in Fair Value of Company's Derivatives Instruments

	Gain (Loss) Recognized in				Gain (Loss) Recognized in
	AOCI on Balance Sheet				Statement of Operations
	Three Months Ended September 30,								Statement of Operations
	2017		2016		2017		2016		Classification
Designated as Cash Flow Hedges
Foreign exchange cash flow hedges	$	(4,458)	$	(2,280)	$	(2,666)	$	245	Cost of sales
Interest rate swaps		743		—		(6)		—	Interest expense, net
Total	$	(3,715)	$	(2,280)	$	(2,672)	$	245
Net Investment Hedges
Euro Notes	$	(13,924)	$	(2,128)	$	—	$	—
Cross-currency swaps (CCS)		(7,112)		—		—		—
Total	$	(21,036)	$	(2,128)	$	—	$	—
Not Designated as Cash Flow Hedges
Foreign exchange forward contracts	$	—	$	—	$	(6,526)	$	1,060	Other expense (income), net
Total	$	—	$	—	$	(6,526)	$	1,060

	Gain (Loss) Recognized in				Gain (Loss) Recognized in
	AOCI on Balance Sheet				Statement of Operations
	Nine Months Ended September 30,								Statement of Operations
	2017		2016		2017		2016		Classification
Designated as Cash Flow Hedges
Foreign exchange cash flow hedges	$	(22,234)	$	(3,676)	$	794	$	616	Cost of sales
Interest rate swaps		743		—		(6)		—	Interest expense, net
Total	$	(21,491)	$	(3,676)	$	788	$	616
Net Investment Hedges
Euro Notes	$	(38,584)	$	(4,615)	$	—	$	—
Cross-currency swaps (CCS)		(7,112)		—		—		—
Total	$	(45,696)	$	(4,615)	$	—	$	—
Not Designated as Cash Flow Hedges
Foreign exchange forward contracts	$	—	$	—	$	(17,036)	$	2,054	Other expense (income), net
Total	$	—	$	—	$	(17,036)	$	2,054

Net Unrealized Gains and Losses Recorded in Consolidated Balance Sheets

	September 30, 2017										December 31, 2016
	Foreign Exchange		Foreign Exchange		Interest		Cross-				Foreign Exchange		Foreign Exchange
	Forward		Cash Flow		Rate		Currency				Forward		Cash Flow
Balance Sheet Classification	Contracts		Hedges		Swaps		Swaps		Total		Contracts		Hedges		Total
Asset Derivatives:
Accounts receivable, net of allowance	$	3,368	$	—	$	—	$	6,420	$	9,788	$	1,664	$	11,018	$	12,682
Deferred charges and other assets		—		—		1,432		—		1,432		—		—		—
Total asset derivatives	$	3,368	$	—	$	1,432	$	6,420	$	11,220	$	1,664	$	11,018	$	12,682
Liability Derivatives:
Accounts payable	$	117	$	9,612	$	688	$	—	$	10,417	$	511	$	—	$	511
Other noncurrent obligations		—		2,148		—		13,531		15,679		—		—		—
Total liability derivatives	$	117	$	11,760	$	688	$	13,531	$	26,096	$	511	$	—	$	511

Gross Amounts of Derivative Instruments and Amounts Offset

	Gross Amounts		Gross Amounts		Net Amounts
	Recognized in the		Offset in the		Presented in the
	Balance Sheet		Balance Sheet		Balance Sheet
Balance at September 30, 2017
Derivative assets	$	12,793	$	(1,573)	$	11,220
Derivative liabilities		27,669		(1,573)		26,096
Balance at December 31, 2016
Derivative assets	$	23,401	$	(10,719)	$	12,682
Derivative liabilities		11,230		(10,719)		511

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Measurements

Schedule of Assets and Liabilities at Fair Value on Recurring Basis

	September 30, 2017
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	3,368	$	—	$	3,368
Foreign exchange forward contracts—(Liabilities)		—		(117)		—		(117)
Foreign exchange cash flow hedges—(Liabilities)		—		(11,760)		—		(11,760)
Interest rate swaps—Assets		—		1,432		—		1,432
Interest rate swaps—(Liabilities)		—		(688)		—		(688)
Cross-currency swaps—Assets		—		6,420		—		6,420
Cross-currency swaps—(Liabilities)		—		(13,531)		—		(13,531)
Total fair value	$	—	$	(14,876)	$	—	$	(14,876)

	December 31, 2016
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	1,664	$	—	$	1,664
Foreign exchange forward contracts—(Liabilities)		—		(511)		—		(511)
Foreign exchange cash flow hedges—Assets		—		11,018		—		11,018
Total fair value	$	—	$	12,171	$	—	$	12,171

Estimated Fair Value of Outstanding Debt Not Carried at Fair Value

	As of		As of
	September 30, 2017		December 31, 2016
2025 Senior Notes	$	515,625	$	—
2022 Senior Notes
USD Notes		—		315,000
Euro Notes		—		424,437
2024 Term Loan B		707,441		—
2021 Term Loan B		—		498,041
Total fair value	$	1,223,066	$	1,237,478

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Provision for Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

Provision for Income Taxes

Schedule of Effective Tax Rate

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2017			2016			2017			2016
Effective income tax rate		20.0	%		19.2	%		21.1	%		21.7	%

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Pension Plans and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2017

Defined Benefit Pension Plans

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Periodic Benefit Costs

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Defined Benefit Pension Plans
Service cost	$	5,000	$	4,156	$	14,291	$	12,438
Interest cost		1,184		1,391		3,376		4,160
Expected return on plan assets		(450)		(492)		(1,285)		(1,474)
Amortization of prior service credit		(503)		(488)		(1,456)		(1,459)
Amortization of net loss		1,479		1,058		4,232		3,169
Net settlement and curtailment loss(1)		—		—		129		—
Net periodic benefit cost	$	6,710	$	5,625	$	19,287	$	16,834

(1) Represents a settlement loss of approximately $0.5 million triggered by benefit payments exceeding the sum of service and interest cost for one of the Company’s pension plans in Switzerland, partially offset by a curtailment gain of approximately $0.4 million related to a reduction in the number of participants in the Company’s pension plan in Japan.

Other Postretirement Plans

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Periodic Benefit Costs

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Other Postretirement Plans
Service cost	$	53	$	67	$	161	$	196
Interest cost		63		135		189		385
Amortization of prior service cost		26		25		77		77
Amortization of net gain		(11)		(43)		(32)		(128)
Net periodic benefit cost	$	131	$	184	$	395	$	530

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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Stock-Based Compensation

Summary of Stock-Based Compensation Expense and Unrecognized Compensation Cost

									As of
	Three Months Ended				Nine Months Ended				September 30, 2017
	September 30,				September 30,				Unrecognized		Weighted
	2017		2016		2017		2016		Compensation Cost		Average Years
RSUs	$	2,287	$	1,476	$	6,295	$	3,826	$	11,682	1.8
Options		454		733		3,661		4,867		1,659	1.4
PSUs		324		—		796		—		3,062	2.4
Restricted Stock Awards issued by Former Parent		—		3,817		—		6,149		—	—
Total Stock-based Compensation Expense	$	3,065	$	6,026	$	10,752	$	14,842

Summary of Awards Granted and Weighted Average Grant-Date Fair Value

	Nine Months Ended
	September 30, 2017
	Awards Granted		Weighted Average Grant Date Fair Value per Award
RSUs		110,767	$	70.85
Options		192,546		20.61
PSUs		50,937		75.74

Summary of Weighted-average Assumptions

	Nine Months Ended
	September 30,
	2017
Expected term (in years)	5.50
Expected volatility	35.00	%
Risk-free interest rate	2.19	%
Dividend yield	2.00	%

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Acquisitions and Divestitures (Tables)

9 Months Ended

Sep. 30, 2017

API Applicazioni Plastiche Industriali S.p.A. [Member]

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

	July 10,
	2017
Cash and cash equivalents	$	8,431
Accounts receivable		16,484
Inventories		10,282
Other current assets		728
Property, plant, and equipment		24,146
Other intangible assets(1)
Customer relationships		14,000
Developed technology		11,500
Other amortizable intangible assets		2,700
Total fair value of assets acquired	$	88,271
Accounts payable	$	12,219
Income taxes payable		202
Accrued expenses and other current liabilities		1,416
Deferred income tax liabilities—noncurrent		11,262
Other noncurrent obligations		1,277
Total fair value of liabilities assumed	$	26,376
Net identifiable assets acquired	$	61,895
Goodwill(2)		28,598
Net assets acquired	$	90,493

(1) The expected lives of the acquired intangible assets are 19 years for customer relationships, 9 years for developed technology, and 3 years for other amortizable intangible assets.

(2) Goodwill consists of expected operating synergies resulting from combining API Plastics with our existing businesses, and is allocated entirely to the Performance Plastics segment. None of the goodwill related to this acquisition will be deductible for income tax purposes.

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Segments (Tables)

9 Months Ended

Sep. 30, 2017

Segments

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Performance Materials						Basic Plastics & Feedstocks
	Latex		Synthetic		Performance		Basic				Americas		Corporate
Three Months Ended	Binders		Rubber		Plastics		Plastics		Feedstocks		Styrenics		Unallocated		Total
September 30, 2017
Sales to external customers	$	266,260	$	118,684	$	206,999	$	393,622	$	111,017	$	—	$	—	$	1,096,582
Equity in earnings of unconsolidated affiliates		—		—		—		—		—		43,807		—		43,807
Adjusted EBITDA(1)		32,343		(5,579)		29,436		42,062		45,597		43,807
Investment in unconsolidated affiliates		—		—		—		—		—		161,883		—		161,883
Depreciation and amortization		6,046		8,960		4,102		4,274		3,603		—		2,191		29,176
September 30, 2016
Sales to external customers	$	242,600	$	112,690	$	175,355	$	323,729	$	81,036	$	—	$	—	$	935,410
Equity in earnings of unconsolidated affiliates		—		—		—		2,356		—		34,330		—		36,686
Adjusted EBITDA(1)		29,815		28,491		30,187		34,134		12,729		34,330
Investment in unconsolidated affiliates		—		—		—		38,197		—		148,802		—		186,999
Depreciation and amortization		5,742		9,138		1,372		4,057		2,446		—		1,016		23,771

	Performance Materials						Basic Plastics & Feedstocks
	Latex		Synthetic		Performance		Basic				Americas		Corporate
Nine Months Ended	Binders		Rubber		Plastics		Plastics		Feedstocks		Styrenics		Unallocated		Total
September 30, 2017
Sales to external customers	$	846,721	$	456,055	$	581,724	$	1,156,831	$	304,940	$	—	$	—	$	3,346,271
Equity in earnings (losses) of unconsolidated affiliates		—		—		—		810		—		92,219		—		93,029
Adjusted EBITDA(1)		105,228		68,381		79,799		112,691		86,342		92,219
Investment in unconsolidated affiliates		—		—		—		—		—		161,883		—		161,883
Depreciation and amortization		17,469		26,027		8,947		12,094		9,172		—		6,511		80,220
September 30, 2016
Sales to external customers	$	684,552	$	326,278	$	527,875	$	1,029,683	$	230,800	$	—	$	—	$	2,799,188
Equity in earnings (losses) of unconsolidated affiliates		—		—		—		5,375		—		104,939		—		110,314
Adjusted EBITDA(1)		70,042		81,787		103,745		115,050		66,087		104,939
Investment in unconsolidated affiliates		—		—		—		38,197		—		148,802		—		186,999
Depreciation and amortization		17,904		26,073		4,505		11,581		8,071		—		3,610		71,744

(1)The Company’s primary measure of segment operating performance is Adjusted EBITDA, which is defined as income from continuing operations before interest expense, net; provision for income taxes; depreciation and amortization expense; loss on extinguishment of long-term debt; asset impairment charges; gains or losses on the dispositions of businesses and assets; restructuring; acquisition related costs and other items. Adjusted EBITDA is a key metric that is used by management to evaluate business performance in comparison to budgets, forecasts, and prior year financial results, providing a measure that management believes reflects core operating performance by removing the impact of transactions and events that would not be considered a part of core operations. Adjusted EBITDA is useful for analytical purposes; however, it should not be considered an alternative to the Company’s reported GAAP results, as there are limitations in using such financial measures. Other companies in the industry may define Adjusted EBITDA differently than the Company, and as a result, it may be difficult to use Adjusted EBITDA, or similarly named financial measures, that other companies may use to compare the performance of those companies to the Company’s segment performance.

Reconciliation of IBT to Adjusted EBITDA

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Income before income taxes	$	41,515	$	83,254	$	267,068	$	306,305
Interest expense, net		18,436		18,832		55,355		56,542
Depreciation and amortization		29,176		23,771		80,220		71,744
Corporate Unallocated(2)		21,864		26,397		70,888		72,766
Adjusted EBITDA Addbacks(3)		76,675		17,432		71,129		34,293
Segment Adjusted EBITDA	$	187,666	$	169,686	$	544,660	$	541,650

(2)Corporate unallocated includes corporate overhead costs and certain other income and expenses.

(3)Adjusted EBITDA addbacks for the three and nine months ended September 30, 2017 and 2016 are as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in millions)	2017		2016		2017		2016
Loss on extinguishment of long-term debt (Note 5)	$	65.3	$	—	$	65.3	$	—
Net loss (gain) on disposition of businesses and assets (Notes 3 and 13)		0.2		0.3		(9.7)		13.2
Restructuring and other charges (Note 15)		1.5		16.8		4.8		18.6
Acquisition transaction and integration costs (Note 13)		3.8		—		4.9		—
Asset impairment charges or write-offs(a)		4.3		—		4.3		—
Other items(b)		1.6		0.3		1.6		2.5
Total Adjusted EBITDA Addbacks	$	76.7	$	17.4	$	71.2	$	34.3

(a) Asset impairment charges for the three and nine months ended September 30, 2017 primarily relate to the impairment of certain long-lived assets in the Company’s Performance Plastics segment.

(b) Other items for the three and nine months ended September 30, 2017 primarily relate to fees incurred in conjunction with the Company’s debt refinancing which was completed during the third quarter of 2017 (refer to Note 5 for further information). Other items for the three and nine months ended September 30, 2016 primarily relate to fees incurred in conjunction with the Company’s secondary offerings completed during these periods.

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Restructuring (Tables)

9 Months Ended

Sep. 30, 2017

Restructuring

Detail of Restructuring Charges

	Three Months Ended				Nine Months Ended				Cumulative
	September 30,				September 30,				Life-to-date
	2017		2016		2017		2016		Charges		Segment
Terneuzen Compounding Restructuring(1)
Asset impairment/accelerated depreciation	$	614	$	—	$	1,745	$	—	$	1,745
Employee termination benefits		170		—		326		—		326
Contract terminations		—		—		590		—		590
Decommissioning and other		192		—		192		—		818
Terneuzen Subtotal	$	976	$	—	$	2,853	$	—	$	3,479	Performance Plastics
Livorno Plant Restructuring(2)
Asset impairment/accelerated depreciation	$	—	$	14,345	$	—	$	14,345	$	14,345
Employee termination benefits		220		1,405		579		1,405		5,211
Contract terminations		—		269		—		269		269
Decommissioning and other		633		64		1,695		64		2,372
Livorno Subtotal	$	853	$	16,083	$	2,274	$	16,083	$	22,197	Latex Binders
Other Restructurings		288		759		1,453		2,989			Various
Total Restructuring Charges	$	2,117	$	16,842	$	6,580	$	19,072

(1) In March 2017, the Company announced plans to upgrade its production capability for compounded resins with the construction of a new state-of-the art compounding facility to replace its existing compounding facility in Terneuzen, The Netherlands. The new facility is expected to start up by the end of 2018, with substantive production at the existing facility expected to cease by December 2018, followed by decommissioning activities in 2019. The Company expects to incur incremental accelerated depreciation charges of approximately $1.9 million through the end of 2018, as well as estimated decommissioning and other charges of approximately $1.2 million throughout 2019, the majority of which are expected to be paid in late 2018 and throughout 2019.

(2) In August 2016, the Company announced its plan to cease manufacturing activities at its latex binders manufacturing facility in Livorno, Italy. The Company expects to incur incremental employee termination benefit charges of $0.2 million throughout 2017, which are expected to be paid in early 2018. The Company also expects to incur additional decommissioning costs associated with this plant shutdown in 2017, the cost of which will be expensed as incurred.

Rollforward of Liability Balances

	Balance at						Balance at
	December 31, 2016		Expenses		Deductions(1)		September 30, 2017
Employee termination benefits	$	5,021	$	2,492	$	(5,674)	$	1,839
Contract terminations		269		590		(122)		737
Decommissioning and other		—		2,474		(2,474)		—
Total	$	5,290	$	5,556	$	(8,270)	$	2,576

(1) Includes primarily payments made against the existing accrual, as well as immaterial impacts of foreign currency remeasurement.

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Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2017

Shareholders' Equity.

Components of AOCI, Net of Income Taxes

	Cumulative		Pension & Other
	Translation		Postretirement Benefit			Cash Flow
Three Months Ended  September 30, 2017 and 2016	Adjustments		Plans, Net			Hedges, Net	Total
Balance as of June 30, 2017	$	(95,747)	$	(61,332)	$	(5,504)	$	(162,583)
Other comprehensive income (loss)		(1,561)		—		(6,387)		(7,948)
Amounts reclassified from AOCI to net income (1)		—		840		2,672		3,512
Balance as of September 30, 2017	$	(97,308)	$	(60,492)	$	(9,219)	$	(167,019)
Balance as of June 30, 2016	$	(106,702)	$	(45,887)	$	4,173	$	(148,416)
Other comprehensive income (loss)		1,488		—		(2,035)		(547)
Amounts reclassified from AOCI to net income (1)		—		533		(245)		288
Balance as of September 30, 2016	$	(105,214)	$	(45,354)	$	1,893	$	(148,675)

	Cumulative		Pension & Other
	Translation		Postretirement Benefit		Cash Flow
Nine Months Ended  September 30, 2017 and 2016	Adjustments		Plans, Net		Hedges, Net		Total
Balance as of December 31, 2016	$	(118,922)	$	(63,504)	$	12,272	$	(170,154)
Other comprehensive income (loss)		21,614		—		(20,703)		911
Amounts reclassified from AOCI to net income (1)		—		3,012		(788)		2,224
Balance as of September 30, 2017	$	(97,308)	$	(60,492)	$	(9,219)	$	(167,019)
Balance as of December 31, 2015	$	(109,120)	$	(46,166)	$	5,569	$	(149,717)
Other comprehensive income (loss)		3,906		(800)		(3,060)		46
Amounts reclassified from AOCI to net income (1)		—		1,612		(616)		996
Balance as of September 30, 2016	$	(105,214)	$	(45,354)	$	1,893	$	(148,675)

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

	Amount Reclassified from AOCI				Amount Reclassified from AOCI
AOCI Components	Three Months Ended  September 30,				Nine Months Ended  September 30,				Statement of Operations
	2017		2016		2017		2016		Classification
Cash flow hedging items
Foreign exchange cash flow hedges	$	2,666	$	(245)	$	(794)	$	(616)	Cost of sales
Interest rate swaps		6		—		6		—	Interest expense, net
Total before tax		2,672		(245)		(788)		(616)
Tax effect		—		—		—		—	Provision for income taxes
Total, net of tax	$	2,672	$	(245)	$	(788)	$	(616)
Amortization of pension and other postretirement benefit plan items
Prior service credit	$	(477)	$	(461)	$	(1,379)	$	(1,382)	(a)
Net actuarial loss		1,697		1,250		4,886		3,770	(a)
Net settlement and curtailment loss		—		—		648		—	(a)
Total before tax		1,220		789		4,155		2,388
Tax effect		(380)		(256)		(1,143)		(776)	Provision for income taxes
Total, net of tax	$	840	$	533	$	3,012	$	1,612

(a) These AOCI components are included in the computation of net periodic benefit costs (see Note 11).

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share

Schedule of Earnings per Share Basic and Diluted

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands, except per share data)	2017		2016		2017		2016
Earnings:
Net income	$	33,215	$	67,254	$	210,668	$	239,805
Shares:
Weighted-average ordinary shares outstanding		43,745		45,865		43,900		47,152
Dilutive effect of RSUs, option awards, and PSUs		1,037		1,096		1,146		889
Diluted weighted-average ordinary shares outstanding		44,782		46,961		45,046		48,041
Income per share:
Income per share—basic	$	0.76	$	1.47	$	4.80	$	5.09
Income per share—diluted	$	0.74	$	1.43	$	4.68	$	4.99

* Refer to Note 12 for discussion of RSUs, option awards, and PSUs granted to certain Company directors and employees. The number of anti-dilutive shares that have been excluded in the computation of diluted earnings per share were 0.2 million for the both the three and nine months ended September 30, 2017, respectively, and zero for both the three and nine months ended September 30, 2016, respectively.

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Investments in Unconsolidated Affiliates (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 31, 2017 USD ($)	Sep. 30, 2017 USD ($) item	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) item	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Investments in Unconsolidated Affiliates
Number of joint ventures | item		2		2
Investments in unconsolidated affiliates		$ 161,883	$ 186,999	$ 161,883	$ 186,999	$ 191,418
Americas Styrenics
Investments in Unconsolidated Affiliates
Investments in unconsolidated affiliates		161,900		161,900		149,700
Investment in unconsolidated affiliates-difference between carrying amount and underlying equity		$ 49,100		$ 49,100		$ 71,200
Percentage of ownership underlying net assets		50.00%		50.00%		50.00%
Amortized weighted average remaining useful life				P3Y1M6D
Dividends received from operating activities		$ 35,000	40,000	$ 80,000	100,000
Sumika Styron Polycarbonate
Investments in Unconsolidated Affiliates
Investments in unconsolidated affiliates		0		0		$ 41,800
Percentage of ownership underlying net assets	50.00%
Sales proceeds	$ 42,100
Gain on sale				9,300
Dividends received from operating and investing activities		$ 0	$ 0	$ 9,800	$ 6,200

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Investments in Unconsolidated Affiliates - Summarized Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Summarized Financial Information, Net Income
Sales	$ 458,744	$ 460,305	$ 1,369,572	$ 1,241,908
Gross profit	90,594	84,095	176,352	240,366
Net income	$ 81,059	$ 65,041	$ 141,508	$ 188,853

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Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Inventories
Finished goods	$ 239,663	$ 187,577
Raw materials and semi-finished goods	211,186	168,804
Supplies	32,309	28,964
Total	$ 483,158	$ 385,345

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Debt - Schedule of Debt (Details) $ in Thousands, € in Millions		9 Months Ended
	Sep. 06, 2017 USD ($)	Sep. 30, 2017 USD ($)	Aug. 31, 2017 USD ($)	Aug. 31, 2017 EUR (€)	Aug. 29, 2017 USD ($)	Dec. 31, 2016 USD ($)	May 31, 2015	May 05, 2015 USD ($)
Debt Instruments
Carrying amount		$ 1,201,481				$ 1,187,411
Unamortized deferred financing fees		(28,557)				(22,042)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent		1,172,924				1,165,369
Less: current portion		(7,000)				(5,000)
Total long-term debt, net of unamortized deferred financing fees		1,165,924				$ 1,160,369
Senior Credit Facility [Member]
Debt Instruments
Maximum borrowing capacity	$ 1,075,000							$ 825,000
2022 Revolving Facility
Debt Instruments
Funds available for borrowings		357,200
Letters of credit, amount outstanding		$ 17,800
Commitment fee (as a percent)		0.375%
Maximum borrowing capacity	375,000
2020 Revolving Facility
Debt Instruments
Carrying amount			$ 0
Maximum borrowing capacity								325,000
2024 Term Loan B
Debt Instruments
Interest rate		3.735%
Carrying amount		$ 700,000
Unamortized deferred financing fees		(18,957)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent		681,043
Less: current portion		$ (7,000)
Maximum borrowing capacity	$ 700,000
Debt instrument, margin rate	2.50%
Variable rate floor (as a percent)	0.00%
2024 Term Loan B | LIBOR [Member]
Debt Instruments
Debt instrument, margin rate	2.50%	2.50%
Variable rate floor (as a percent)	0.00%	0.00%
2021 Term Loan B
Debt Instruments
Interest rate						4.25%
Carrying amount						$ 491,545
Unamortized deferred financing fees						(9,159)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent			$ 490,000			$ 482,386
Maximum borrowing capacity								$ 500,000
2025 Senior Notes
Debt Instruments
Interest rate		5.375%			5.375%
Carrying amount		$ 500,000
Unamortized deferred financing fees		(9,600)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent		$ 490,400			$ 500,000
USD Notes
Debt Instruments
Interest rate						6.75%	6.75%
Carrying amount						$ 300,000
Unamortized deferred financing fees						(5,726)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent						$ 294,274
Euro Notes
Debt Instruments
Interest rate						6.375%	6.375%
Carrying amount						$ 394,275
Unamortized deferred financing fees						(7,157)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent				€ 375.0		387,118
Accounts Receivable Securitization Facility [Member]
Debt Instruments
Interest rate		0.00%
Carrying amount		$ 0
Unamortized deferred financing fees		0
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent		$ 0
Commitment fee (as a percent)		1.40%
Maximum borrowing capacity		$ 200,000
Accounts receivable available to support facility		$ 148,800
Accounts Receivable Securitization Facility [Member] | Base Rate [Member]
Debt Instruments
Interest rate		2.60%
Other Indebtedness [Member]
Debt Instruments
Carrying amount		$ 1,481				1,591
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent		$ 1,481				$ 1,591

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Debt - Senior Credit Facility (Details) $ in Thousands		3 Months Ended	9 Months Ended
	Sep. 06, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Aug. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	May 05, 2015 USD ($)
Debt Instruments
Long-term Debt		$ 1,172,924	$ 1,172,924		$ 1,165,369
Carrying amount		1,201,481	1,201,481		1,187,411
Loss on extinguishment of debt		65,260	65,260
Current portion		7,000	7,000		5,000
Senior Credit Facility [Member]
Debt Instruments
Maximum borrowing capacity	$ 1,075,000					$ 825,000
Loss on extinguishment of debt			800
2022 Revolving Facility
Debt Instruments
Maximum borrowing capacity	$ 375,000
Percentage of Revolving Facility borrowing capacity covenant trigger	30.00%
Undrawn letters of credit	$ 10,000
Capitalization of issuance costs	$ 800
Amortization period	5 years
Funds available for borrowings		357,200	357,200
Letters of credit, amount outstanding		17,800	$ 17,800
Commitment fee (as a percent)			0.375%
2022 Revolving Facility | Maximum
Debt Instruments
Net leverage ratio	2.00
Swingline Subfacility [Member]
Debt Instruments
Maximum borrowing capacity	$ 25,000
Letter of Credit [Member]
Debt Instruments
Maximum borrowing capacity	35,000
2020 Revolving Facility
Debt Instruments
Maximum borrowing capacity						325,000
Unamortized deferred financing fees	4,000
Carrying amount				$ 0
2024 Term Loan B
Debt Instruments
Maximum borrowing capacity	$ 700,000
Debt instrument, margin rate	2.50%
Variable rate floor (as a percent)	0.00%
Principal payable per quarter, as a percent	0.25%
Debt issuance fees incurred	$ 12,300
Debt issuance fees expensed		1,200	$ 1,200
Capitalization of issuance costs	$ 11,100
Amortization period	7 years
Long-term Debt		681,043	681,043
Carrying amount		700,000	700,000
Current portion		$ 7,000	$ 7,000
2021 Term Loan B
Debt Instruments
Maximum borrowing capacity						$ 500,000
Unamortized deferred financing fees	$ 8,100
Long-term Debt				$ 490,000	482,386
Carrying amount					$ 491,545
LIBOR [Member] | 2024 Term Loan B
Debt Instruments
Debt instrument, margin rate	2.50%		2.50%
Variable rate floor (as a percent)	0.00%		0.00%

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Debt - Senior Notes (Details) $ in Thousands, € in Millions			3 Months Ended	9 Months Ended
	Sep. 07, 2017 USD ($)	Aug. 29, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	May 31, 2015 USD ($)	May 31, 2015 EUR (€)
Debt Instruments
Redemption of Senior Notes				$ 745,950
Call premium				52,978
Loss on extinguishment of debt			$ 65,260	65,260
Unamortized deferred financing fees			28,557	$ 28,557	$ 22,042
2022 Senior Notes
Debt Instruments
Redemption of Senior Notes	$ 746,000
Call premium	53,000
Accrued and unpaid interest	$ 17,000
Loss on extinguishment of debt			64,500
Write-off of unamortized deferred financing fees			$ 11,500
Euro Notes
Debt Instruments
Debt instrument issued | €							€ 375.0
Debt instrument, stated interest rate					6.375%	6.375%	6.375%
Debt instrument, redemption price percentage	107.459%
Unamortized deferred financing fees					$ 7,157
USD Notes
Debt Instruments
Debt instrument issued						$ 300,000
Debt instrument, stated interest rate					6.75%	6.75%	6.75%
Debt instrument, redemption price percentage	106.572%
Unamortized deferred financing fees					$ 5,726
2025 Senior Notes
Debt Instruments
Debt instrument issued		$ 500,000
Debt instrument, stated interest rate		5.375%	5.375%	5.375%
Unamortized deferred financing fees			$ 9,600	$ 9,600
Capitalization of issuance costs		$ 9,700
Amortization period		8 years
2025 Senior Notes | Period prior to September 1, 2020
Debt Instruments
Debt instrument, redemption price percentage		100.00%
Aggregate principal amount that may be redeemed, as a percent		40.00%
Redemption price, as percentage of principal		105.375%
2025 Senior Notes | 12-month period commencing September 1, 2020
Debt Instruments
Debt instrument, redemption price percentage		102.688%
2025 Senior Notes | 12-month period commencing September 1, 2021
Debt Instruments
Debt instrument, redemption price percentage		101.792%
2025 Senior Notes | 12-month period commencing September 1, 2022
Debt Instruments
Debt instrument, redemption price percentage		100.896%
2025 Senior Notes | 12-Month period commencing September 1, 2023 and thereafter
Debt Instruments
Debt instrument, redemption price percentage		100.00%

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Goodwill and Intangible Assets (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 29,485
Acquisition	28,598
Foreign currency impact	4,691
Ending Balance	62,774
Latex Binders Segment
Goodwill [Roll Forward]
Beginning Balance	11,544
Foreign currency impact	1,415
Ending Balance	12,959
Synthetic Rubber Segment
Goodwill [Roll Forward]
Beginning Balance	8,177
Foreign currency impact	1,002
Ending Balance	9,179
Performance Plastics Segment [Member]
Goodwill [Roll Forward]
Beginning Balance	4,210
Acquisition	28,598
Foreign currency impact	1,592
Ending Balance	34,400
Basic Plastics Segment [Member]
Goodwill [Roll Forward]
Beginning Balance	5,554
Foreign currency impact	682
Ending Balance	$ 6,236

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Goodwill and Intangible Assets - Other Intangible Assets Table (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended	21 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2017
Other Intangible Assets
Net	$ 207,819	$ 177,345	$ 207,819
Developed Technology [Member]
Other Intangible Assets
Gross Carrying Amount	198,535	166,230	198,535
Accumulated Amortization	(91,078)	(72,159)	(91,078)
Net	$ 107,457	$ 94,071	107,457
Developed Technology [Member] | Maximum
Other Intangible Assets
Estimated Useful Life (Years)	15 years	15 years
Developed Technology [Member] | Minimum
Other Intangible Assets
Estimated Useful Life (Years)	9 years	9 years
Customer Relationships [Member]
Other Intangible Assets
Estimated Useful Life (Years)	19 years
Gross Carrying Amount	$ 14,520		14,520
Accumulated Amortization	(171)		(171)
Net	$ 14,349		14,349
Manufacturing Capacity Rights [Member]
Other Intangible Assets
Estimated Useful Life (Years)	6 years
Gross Carrying Amount	$ 22,426	$ 19,977	22,426
Accumulated Amortization	(12,728)	(8,908)	(12,728)
Net	9,698	11,069	9,698
Software [Member]
Other Intangible Assets
Gross Carrying Amount	87,412	82,275	87,412
Accumulated Amortization	(22,617)	(15,095)	(22,617)
Net	$ 64,795	$ 67,180	$ 64,795
Software [Member] | Maximum
Other Intangible Assets
Estimated Useful Life (Years)	10 years	10 years
Software [Member] | Minimum
Other Intangible Assets
Estimated Useful Life (Years)			5 years
Software in Development [Member]
Other Intangible Assets
Gross Carrying Amount	$ 8,617	$ 4,751	$ 8,617
Net	$ 8,617	4,751	8,617
Other [Member]
Other Intangible Assets
Estimated Useful Life (Years)	3 years
Gross Carrying Amount	$ 3,056	274	3,056
Accumulated Amortization	(153)		(153)
Net	$ 2,903	$ 274	$ 2,903

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Goodwill and Intangible Assets - Amortization Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Goodwill and Intangible Assets.
Amortization expense related to finite-lived intangible assets	$ 7.2	$ 5.0	$ 19.6	$ 15.2

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Derivative Instruments (Details) $ in Thousands, € in Millions			3 Months Ended		9 Months Ended
	Sep. 06, 2017	Sep. 01, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) item	Sep. 30, 2016 USD ($)	Sep. 01, 2017 EUR (€)	Aug. 31, 2017 EUR (€)	Aug. 29, 2017 USD ($)	Dec. 31, 2016 USD ($)	May 31, 2015
Derivative Instruments
Total debt			$ 1,172,924		$ 1,172,924					$ 1,165,369
Information regarding changes in fair value of derivatives
Foreign exchange transaction gains (losses)			8,200	$ 1,500	16,100	$ (4,100)
Ineffectiveness related to derivatives designated as hedges					0
Reclassification expected during next 12 months					(10,300)
Net Investment Hedges
Information regarding changes in fair value of derivatives
Gain (Loss) Recognized in AOCI on Balance Sheet			(21,036)	(2,128)	(45,696)	(4,615)
Not Designated as Hedging Instruments - Economic
Information regarding changes in fair value of derivatives
Gain (Loss) Recognized in Statement of Operations			(6,526)	1,060	(17,036)	2,054
Designated as Hedging Instrument | Cash Flow Hedges
Information regarding changes in fair value of derivatives
Gain (Loss) Recognized in AOCI on Balance Sheet			(3,715)	(2,280)	(21,491)	(3,676)
Gain (Loss) Recognized in Statement of Operations			(2,672)	245	788	616
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments - Economic
Derivative Instruments
Derivative contracts, notional amount			327,900		327,900
Foreign Exchange Forward Contracts | Designated as Hedging Instrument
Derivative Instruments
Derivative contracts, notional amount			196,500		$ 196,500
Number of subsidiaries participating | item					1
Derivative term					15 months
Cross Currency Swap | Net Investment Hedges
Derivative Instruments
Derivative contracts, notional amount | €							€ 420.0
Derivative term		5 years
Cross currency swap weighted average interest rate (as a percent)		3.45%
Amount hedged		$ 500,000
Cumulative translation adjustment, net of tax			7,100		$ 7,100
Information regarding changes in fair value of derivatives
Gain (Loss) Recognized in AOCI on Balance Sheet			(7,112)		(7,112)
Debt Instrument Hedge | Net Investment Hedges
Derivative Instruments
Total debt | €								€ 280.0
Cumulative translation adjustment, net of tax			24,100		24,100
Information regarding changes in fair value of derivatives
Gain (Loss) Recognized in AOCI on Balance Sheet			(13,924)	(2,128)	(38,584)	(4,615)
Interest Rate Swap
Derivative Instruments
Derivative contracts, notional amount			200,000		$ 200,000
Derivative term					5 years
Cost of Sales | Foreign Exchange Forward Contracts | Designated as Hedging Instrument | Cash Flow Hedges
Information regarding changes in fair value of derivatives
Gain (Loss) Recognized in AOCI on Balance Sheet			(4,458)	(2,280)	$ (22,234)	(3,676)
Gain (Loss) Recognized in Statement of Operations			(2,666)	245	794	616
Interest Expense, Net | Interest Rate Swap | Designated as Hedging Instrument | Cash Flow Hedges
Information regarding changes in fair value of derivatives
Gain (Loss) Recognized in AOCI on Balance Sheet			743		743
Gain (Loss) Recognized in Statement of Operations			(6)		(6)
Other Expense (Income), Net | Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments - Economic
Information regarding changes in fair value of derivatives
Gain (Loss) Recognized in Statement of Operations			(6,526)	$ 1,060	(17,036)	$ 2,054
Euro Notes
Derivative Instruments
Total debt								€ 375.0		$ 387,118
Interest rate										6.375%	6.375%
2025 Senior Notes
Derivative Instruments
Total debt			$ 490,400		$ 490,400				$ 500,000
Interest rate			5.375%		5.375%				5.375%
2024 Term Loan B
Derivative Instruments
Total debt			$ 681,043		$ 681,043
Debt instrument, margin rate	2.50%
Variable rate floor (as a percent)	0.00%
Interest rate			3.735%		3.735%
2024 Term Loan B | LIBOR [Member]
Derivative Instruments
Debt instrument, margin rate	2.50%				2.50%
Variable rate floor (as a percent)	0.00%				0.00%
Euro [Member] | Foreign Exchange Forward Contracts | Sell | Not Designated as Hedging Instruments - Economic
Derivative Instruments
Derivative contracts, notional amount			$ 161,885		$ 161,885
Chinese Yuan [Member] | Foreign Exchange Forward Contracts | Sell | Not Designated as Hedging Instruments - Economic
Derivative Instruments
Derivative contracts, notional amount			58,335		58,335
Indonesian Rupiah [Member] | Foreign Exchange Forward Contracts | Sell | Not Designated as Hedging Instruments - Economic
Derivative Instruments
Derivative contracts, notional amount			29,493		29,493
Swiss Franc [Member] | Foreign Exchange Forward Contracts | Buy | Not Designated as Hedging Instruments - Economic
Derivative Instruments
Derivative contracts, notional amount			16,762		16,762
Korea (South), Won | Foreign Exchange Forward Contracts | Sell | Not Designated as Hedging Instruments - Economic
Derivative Instruments
Derivative contracts, notional amount			$ 10,983		$ 10,983

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Derivative Instruments - Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet	$ 11,220	$ 12,682
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	26,096	511
Accounts Receivable
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet	9,788	12,682
Deferred Charges and Other Assets
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet	1,432
Accounts Payable
Derivatives, Financial Assets and Liabilities
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	10,417	511
Other Noncurrent Obligations
Derivatives, Financial Assets and Liabilities
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	15,679
Foreign Exchange Forward Contracts
Derivatives, Financial Assets and Liabilities
Gross Amounts of Recognized Assets	12,793	23,401
Gross Amounts of Offset in the Consolidated Balance Sheet	(1,573)	(10,719)
Net Amounts of Assets Presented in the Consolidated Balance Sheet	11,220	12,682
Gross Amounts of Recognized Liabilities	27,669	11,230
Gross Amounts of Offset in the Consolidated Balance Sheet	(1,573)	(10,719)
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	26,096	511
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments - Economic
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet	3,368	1,664
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	117	511
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments - Economic | Accounts Receivable
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet	3,368	1,664
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments - Economic | Accounts Payable
Derivatives, Financial Assets and Liabilities
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	117	511
Foreign Exchange Forward Contracts | Designated as Hedging Instrument
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet		11,018
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	11,760
Foreign Exchange Forward Contracts | Designated as Hedging Instrument | Accounts Receivable
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet		$ 11,018
Foreign Exchange Forward Contracts | Designated as Hedging Instrument | Accounts Payable
Derivatives, Financial Assets and Liabilities
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	9,612
Foreign Exchange Forward Contracts | Designated as Hedging Instrument | Other Noncurrent Obligations
Derivatives, Financial Assets and Liabilities
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	2,148
Interest Rate Swap
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet	1,432
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	688
Interest Rate Swap | Deferred Charges and Other Assets
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet	1,432
Interest Rate Swap | Accounts Payable
Derivatives, Financial Assets and Liabilities
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	688
Cross Currency Swap
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet	6,420
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	13,531
Cross Currency Swap | Accounts Receivable
Derivatives, Financial Assets and Liabilities
Net Amounts of Assets Presented in the Consolidated Balance Sheet	6,420
Cross Currency Swap | Other Noncurrent Obligations
Derivatives, Financial Assets and Liabilities
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	$ 13,531

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Fair Value Measurements - Assets and Liabilities at Fair Value, Recurring (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value Measurements
Assets at fair value	$ 11,220	$ 12,682
Liabilities at fair value	(26,096)	(511)
Foreign Exchange Forward Contracts
Fair Value Measurements
Assets at fair value	11,220	12,682
Liabilities at fair value	(26,096)	(511)
Interest Rate Swap
Fair Value Measurements
Assets at fair value	1,432
Liabilities at fair value	(688)
Cross Currency Swap
Fair Value Measurements
Assets at fair value	6,420
Liabilities at fair value	(13,531)
Designated as Hedging Instrument | Foreign Exchange Forward Contracts
Fair Value Measurements
Assets at fair value		11,018
Liabilities at fair value	(11,760)
Not Designated as Hedging Instruments - Economic | Foreign Exchange Forward Contracts
Fair Value Measurements
Assets at fair value	3,368	1,664
Liabilities at fair value	(117)	(511)
Recurring
Fair Value Measurements
Total fair value	(14,876)	12,171
Recurring | Interest Rate Swap
Fair Value Measurements
Assets at fair value	1,432
Liabilities at fair value	(688)
Recurring | Cross Currency Swap
Fair Value Measurements
Assets at fair value	6,420
Liabilities at fair value	(13,531)
Recurring | Significant Other Observable Inputs (Level 2)
Fair Value Measurements
Total fair value	(14,876)	12,171
Recurring | Significant Other Observable Inputs (Level 2) | Interest Rate Swap
Fair Value Measurements
Assets at fair value	1,432
Liabilities at fair value	(688)
Recurring | Significant Other Observable Inputs (Level 2) | Cross Currency Swap
Fair Value Measurements
Assets at fair value	6,420
Liabilities at fair value	(13,531)
Recurring | Designated as Hedging Instrument | Foreign Exchange Forward Contracts
Fair Value Measurements
Assets at fair value		11,018
Liabilities at fair value	(11,760)
Recurring | Designated as Hedging Instrument | Significant Other Observable Inputs (Level 2) | Foreign Exchange Forward Contracts
Fair Value Measurements
Assets at fair value		11,018
Liabilities at fair value	(11,760)
Recurring | Not Designated as Hedging Instruments - Economic | Foreign Exchange Forward Contracts
Fair Value Measurements
Assets at fair value	3,368	1,664
Liabilities at fair value	(117)	(511)
Recurring | Not Designated as Hedging Instruments - Economic | Significant Other Observable Inputs (Level 2) | Foreign Exchange Forward Contracts
Fair Value Measurements
Assets at fair value	3,368	1,664
Liabilities at fair value	$ (117)	$ (511)

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Fair Value Measurements - Items not at Fair Value (Details) - Significant Other Observable Inputs (Level 2) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value of Debt Instruments
Total fair value of long term debt	$ 1,223,066	$ 1,237,478
2025 Senior Notes
Fair Value of Debt Instruments
Total fair value of long term debt	515,625
USD Notes
Fair Value of Debt Instruments
Total fair value of long term debt		315,000
Euro Notes
Fair Value of Debt Instruments
Total fair value of long term debt		424,437
2024 Term Loan B
Fair Value of Debt Instruments
Total fair value of long term debt	$ 707,441
2021 Term Loan B
Fair Value of Debt Instruments
Total fair value of long term debt		$ 498,041

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Income Taxes - Effective Tax Rate (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Taxes [Line Items]
Effective tax rate	20.00%	19.20%	21.10%	21.70%
Provision for income taxes	$ 8,300	$ 16,000	$ 56,400	$ 66,500
Impairment charge related to loss on sale of business		$ 300		$ 13,200
2022 Senior Notes
Income Taxes [Line Items]
Non-deductible fees for retirement of debt	10,900
Write-off of unamortized deferred financing fees	$ 11,500

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Commitments and Contingencies (Details)	Sep. 30, 2017 USD ($) item	Dec. 31, 2016 USD ($)
Commitments and Contingencies Disclosure
Environmental claims asserted | item	0
Accrued obligations for environmental remediation and restoration costs | $	$ 0	$ 0

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Commitments and Contingencies - Purchase Commitments (Details)	9 Months Ended
	Sep. 30, 2017
Maximum
Loss Contingencies [Line Items]
Purchase commitment period	5 years
Minimum
Loss Contingencies [Line Items]
Purchase commitment period	1 year

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Pension Plans and Other Postretirement Benefits - Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Pension Plans
Net periodic benefit cost
Service cost	$ 5,000	$ 4,156	$ 14,291	$ 12,438
Interest cost	1,184	1,391	3,376	4,160
Expected return on plan assets	(450)	(492)	(1,285)	(1,474)
Amortization of prior service cost (credit)	(503)	(488)	(1,456)	(1,459)
Amortization of net (gain) loss	1,479	1,058	4,232	3,169
Net settlement and curtailment loss			129
Net periodic benefit cost	6,710	5,625	19,287	16,834
Settlement loss			500
Defined benefit curtailment gain			400
Amounts recognized in other comprehensive income (loss)
Net periodic benefit cost	6,710	5,625	19,287	16,834
Other Postretirement Plans
Net periodic benefit cost
Service cost	53	67	161	196
Interest cost	63	135	189	385
Amortization of prior service cost (credit)	26	25	77	77
Amortization of net (gain) loss	(11)	(43)	(32)	(128)
Net periodic benefit cost	131	184	395	530
Amounts recognized in other comprehensive income (loss)
Net periodic benefit cost	$ 131	$ 184	$ 395	$ 530

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Pension Plans and Other Postretirement Benefits - Net Amounts Recognized (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Net amounts recognized in the balance sheets at December 31
Benefit obligations	$ 221.6	$ 221.6	$ 195.8
Employer contributions	1.7	11.9
Expected contributions, remainder of current year	$ 4.0	$ 4.0

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Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Stock-based Compensation
Compensation expense	$ 3,065	$ 6,026	$ 10,752	$ 14,842
Incentive Plan Under Former Parent [Member]
Stock-based Compensation
Compensation expense		3,817		6,149
Restricted Stock Units
Stock-based Compensation
Compensation expense	2,287	1,476	6,295	3,826
Unrecognized compensation cost	11,682		$ 11,682
Weighted-average period of recognition			1 year 9 months 18 days
Other-than-Options, Shares Activity
Granted, Shares			110,767
Other-than-Options, FV Activity
Granted, Weighted-Average Grant Date Fair Value per Share			$ 70.85
Option Awards
Stock-based Compensation
Compensation expense	454	$ 733	$ 3,661	$ 4,867
Unrecognized compensation cost	1,659		$ 1,659
Weighted-average period of recognition			1 year 4 months 24 days
Options Outstanding Roll Forward
Granted, Options			192,546
Options, Additional Disclosures
Options granted, Weighted average grant date fair value			$ 20.61
Fair Value Assumptions
Expected term (in years)			5 years 6 months
Expected volatility			35.00%
Risk-free interest rate			2.19%
Dividend yield			2.00%
Performance Share Units
Stock-based Compensation
Compensation expense	324		$ 796
Unrecognized compensation cost	$ 3,062		$ 3,062
Weighted-average period of recognition			2 years 4 months 24 days
Other-than-Options, Shares Activity
Granted, Shares			50,937
Other-than-Options, FV Activity
Granted, Weighted-Average Grant Date Fair Value per Share			$ 75.74
Performance Share Units | Minimum
Other-than-Options, FV Activity
Vesting percentage			0.00%
Performance Share Units | Maximum
Other-than-Options, FV Activity
Vesting percentage			200.00%

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Acquisitions and Divestitures - Acquisition (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Jul. 10, 2017	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Purchase price, net of cash acquired			$ 79,650
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill		$ 62,774	62,774	$ 29,485
API Applicazioni Plastiche Industriali S.p.A. [Member]
Business Acquisition [Line Items]
Equity interest acquired	100.00%
Purchase price, net of cash acquired	$ 82,100		79,700
Purchase price payable		2,400	2,400
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Cash and cash equivalents	8,431
Accounts receivable	16,484
Inventories	10,282
Other current assets	728
Property, plant, and equipment	24,146
Total fair value of assets acquired	88,271
Accounts payable	12,219
Income taxes payable	202
Accrued expenses and other current liabilities	1,416
Deferred income tax liabilities—noncurrent	11,262
Other noncurrent obligations	1,277
Total fair value of liabilities assumed	26,376
Net identifiable assets acquired	61,895
Goodwill	28,598
Net assets acquired	90,493
Expected deduction for goodwill	0
Transaction costs		2,400	3,500
Inventory adjustment		$ 1,300	$ 1,300
API Applicazioni Plastiche Industriali S.p.A. [Member] | Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Other intangible assets	$ 14,000
Expected life	19 years
API Applicazioni Plastiche Industriali S.p.A. [Member] | Developed Technology [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Other intangible assets	$ 11,500
Expected life	9 years
API Applicazioni Plastiche Industriali S.p.A. [Member] | Other [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Other intangible assets	$ 2,700
Expected life	3 years

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Acquisitions and Divestitures - Divestitures (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Disclosures by disposal group
Impairment charge related to loss on sale of business	$ 0.3		$ 13.2
Brazil Latex and Automotive Businesses [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Disclosures by disposal group
Impairment charge related to loss on sale of business	$ 0.3		13.2
Sales proceeds		$ 1.7		$ 1.8
Latex Binders Segment | Brazil Latex and Automotive Businesses [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Disclosures by disposal group
Impairment charge related to loss on sale of business			4.2
Performance Plastics Segment [Member] | Brazil Latex and Automotive Businesses [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Disclosures by disposal group
Impairment charge related to loss on sale of business			8.4
Corporate Unallocated [Member] | Brazil Latex and Automotive Businesses [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Disclosures by disposal group
Impairment charge related to loss on sale of business			$ 0.6

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Segments - Reconciliation of Segment Reporting to Consolidated (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Jan. 31, 2017	Dec. 31, 2016 USD ($)	Oct. 01, 2016 segment
Segment Reporting Information [Line Items]
Number of new segments from split | segment							3
Sales to external customers	$ 1,096,582	$ 935,410	$ 3,346,271	$ 2,799,188
Equity in earnings (losses) of unconsolidated affiliates	43,807	36,686	93,029	110,314
Adjusted EBITDA	187,666	169,686	544,660	541,650
Investment in unconsolidated affiliates	161,883	186,999	161,883	186,999		$ 191,418
Depreciation and amortization	$ 29,176	23,771	$ 80,220	71,744
Americas Styrenics
Segment Reporting Information [Line Items]
Percentage of ownership underlying net assets	50.00%		50.00%			50.00%
Investment in unconsolidated affiliates	$ 161,900		$ 161,900			$ 149,700
Sumika Styron Polycarbonate
Segment Reporting Information [Line Items]
Percentage of ownership underlying net assets					50.00%
Investment in unconsolidated affiliates	0		0			$ 41,800
Corporate Unallocated [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	2,191	1,016	6,511	3,610
Latex Binders Segment
Segment Reporting Information [Line Items]
Sales to external customers	266,260	242,600	846,721	684,552
Adjusted EBITDA	32,343	29,815	105,228	70,042
Depreciation and amortization	6,046	5,742	17,469	17,904
Synthetic Rubber Segment
Segment Reporting Information [Line Items]
Sales to external customers	118,684	112,690	456,055	326,278
Adjusted EBITDA	(5,579)	28,491	68,381	81,787
Depreciation and amortization	8,960	9,138	26,027	26,073
Performance Plastics Segment [Member]
Segment Reporting Information [Line Items]
Sales to external customers	206,999	175,355	581,724	527,875
Adjusted EBITDA	29,436	30,187	79,799	103,745
Depreciation and amortization	4,102	1,372	8,947	4,505
Basic Plastics Segment [Member]
Segment Reporting Information [Line Items]
Sales to external customers	393,622	323,729	1,156,831	1,029,683
Equity in earnings (losses) of unconsolidated affiliates		2,356	810	5,375
Adjusted EBITDA	42,062	34,134	112,691	115,050
Investment in unconsolidated affiliates		38,197		38,197
Depreciation and amortization	4,274	4,057	12,094	11,581
Basic Plastics Segment [Member] | Sumika Styron Polycarbonate
Segment Reporting Information [Line Items]
Percentage of ownership underlying net assets					50.00%
Feedstocks [Member]
Segment Reporting Information [Line Items]
Sales to external customers	111,017	81,036	304,940	230,800
Adjusted EBITDA	45,597	12,729	86,342	66,087
Depreciation and amortization	3,603	2,446	9,172	8,071
Americas Styrenics [Member]
Segment Reporting Information [Line Items]
Equity in earnings (losses) of unconsolidated affiliates	43,807	34,330	92,219	104,939
Adjusted EBITDA	43,807	34,330	92,219	104,939
Investment in unconsolidated affiliates	$ 161,883	$ 148,802	$ 161,883	$ 148,802
Americas Styrenics [Member] | Americas Styrenics
Segment Reporting Information [Line Items]
Percentage of ownership underlying net assets	50.00%		50.00%

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Segments - Recon. of Net Income to Segment Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Income before income taxes	$ 41,515	$ 83,254	$ 267,068	$ 306,305
Interest expense, net	(18,436)	(18,832)	(55,355)	(56,542)
Depreciation and amortization	29,176	23,771	80,220	71,744
Corporate Unallocated	21,864	26,397	70,888	72,766
Adjusted EBITDA addbacks	76,675	17,432	71,129	34,293
Adjusted EBITDA	187,666	169,686	544,660	541,650
Loss on extinguishment of long-term debt	65,260		65,260
Net loss (gain) on disposition of businesses and assets	200	300	(9,700)	13,200
Restructuring and other charges	1,500	16,800	4,800	18,600
Acquisition transactions and integration costs	3,800		4,900
Asset impairment charges or write-offs	4,300		4,300
Other items	1,600	300	1,600	2,500
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income before income taxes	41,515	83,254	267,068	306,305
Corporate Unallocated [Member]
Segment Reporting Information [Line Items]
Interest expense, net	(18,436)	(18,832)	(55,355)	(56,542)
Depreciation and amortization	$ 2,191	$ 1,016	$ 6,511	$ 3,610

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Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 2,117	$ 16,842	$ 6,580	$ 19,072
Restructuring Reserve [Roll Forward]
Accrued charges/Balance at beginning of period			5,290
Expenses			5,556
Payments/Deductions			(8,270)
Accrued charges/Balance at end of period	2,576		2,576
Terneuzen Plant Modernization
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	976		2,853
Cumulative life-to-date charges	3,479		3,479
Livorno Plant Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	853	16,083	2,274	16,083
Cumulative life-to-date charges	22,197		22,197
Other Restructurings
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	288	759	1,453	2,989
Asset Impairment And Accelerated Depreciation [Member] | Terneuzen Plant Modernization
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	614		1,745
Cumulative life-to-date charges	1,745		1,745
Asset Impairment And Accelerated Depreciation [Member] | Livorno Plant Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		14,345		14,345
Cumulative life-to-date charges	14,345		14,345
Accelerated Depreciation On Related Assets [Member] | Terneuzen Plant Modernization
Restructuring Reserve [Roll Forward]
Expected restructuring charges	1,900		1,900
Employee Termination Benefit Charges
Restructuring Reserve [Roll Forward]
Accrued charges/Balance at beginning of period			5,021
Expenses			2,492
Payments/Deductions			(5,674)
Accrued charges/Balance at end of period	1,839		1,839
Employee Termination Benefit Charges | Terneuzen Plant Modernization
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	170		326
Cumulative life-to-date charges	326		326
Employee Termination Benefit Charges | Livorno Plant Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	220	1,405	579	1,405
Cumulative life-to-date charges	5,211		5,211
Restructuring Reserve [Roll Forward]
Expected restructuring charges	200		200
Contract Termination
Restructuring Reserve [Roll Forward]
Accrued charges/Balance at beginning of period			269
Expenses			590
Payments/Deductions			(122)
Accrued charges/Balance at end of period	737		737
Contract Termination | Terneuzen Plant Modernization
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			590
Cumulative life-to-date charges	590		590
Contract Termination | Livorno Plant Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		269		269
Cumulative life-to-date charges	269		269
Decommissioning and Other Charges
Restructuring Reserve [Roll Forward]
Expenses			2,474
Payments/Deductions			(2,474)
Decommissioning and Other Charges | Terneuzen Plant Modernization
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	192		192
Cumulative life-to-date charges	818		818
Restructuring Reserve [Roll Forward]
Expected restructuring charges	1,200		1,200
Decommissioning and Other Charges | Livorno Plant Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	633	$ 64	1,695	$ 64
Cumulative life-to-date charges	$ 2,372		$ 2,372

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Accumulated Other Comprehensive Income (Loss) - Components (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			$ 445,053	$ 389,014
Balance at end of period	$ 570,042	$ 423,437	570,042	423,437
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(95,747)	(106,702)	(118,922)	(109,120)
Other comprehensive income (loss)	(1,561)	1,488	21,614	3,906
Balance at end of period	(97,308)	(105,214)	(97,308)	(105,214)
Pension and Other Postretirement Benefit Plans, Net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(61,332)	(45,887)	(63,504)	(46,166)
Other comprehensive income (loss)				(800)
Amounts reclassified from AOCI to net income	840	533	3,012	1,612
Balance at end of period	(60,492)	(45,354)	(60,492)	(45,354)
Accumulated Gain Loss from Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(5,504)	4,173	12,272	5,569
Other comprehensive income (loss)	(6,387)	(2,035)	(20,703)	(3,060)
Amounts reclassified from AOCI to net income	2,672	(245)	(788)	(616)
Balance at end of period	(9,219)	1,893	(9,219)	1,893
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(162,583)	(148,416)	(170,154)	(149,717)
Other comprehensive income (loss)	(7,948)	(547)	911	46
Amounts reclassified from AOCI to net income	3,512	288	2,224	996
Balance at end of period	$ (167,019)	$ (148,675)	$ (167,019)	$ (148,675)

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Accumulated Other Comprehensive Income (Loss) - Reclassification (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest Income (Expense), Nonoperating, Net	$ (18,436)	$ (18,832)	$ (55,355)	$ (56,542)
Other Nonoperating Income (Expense)	11	(1,084)	6,072	(16,628)
Income before income taxes	41,515	83,254	267,068	306,305
Tax effect	(8,300)	(16,000)	(56,400)	(66,500)
Net income	33,215	67,254	210,668	239,805
Pension and Other Postretirement Benefit Plans, Net
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	1,220	789
Tax effect	(380)	(256)
Net income	840	533
Pension and Other Postretirement Benefit Plans, Net | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net settlement and curtailment loss			648
Income before income taxes			4,155	2,388
Tax effect			(1,143)	(776)
Net income			3,012	1,612
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service credit	(477)	(461)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service credit			(1,379)	(1,382)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net actuarial loss	1,697	1,250
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net actuarial loss			4,886	3,770
Accumulated Gain Loss from Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Sales	2,666	(245)
Interest Income (Expense), Nonoperating, Net	6
Income before income taxes	2,672	(245)
Net income	$ 2,672	$ (245)
Accumulated Gain Loss from Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Sales			(794)	(616)
Interest Income (Expense), Nonoperating, Net			6
Income before income taxes			(788)	(616)
Net income			$ (788)	$ (616)

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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings:
Net income (loss)	$ 33,215	$ 67,254	$ 210,668	$ 239,805
Shares:
Weighted average ordinary shares outstanding	43,745	45,865	43,900	47,152
Dilutive effect of RSUs and option awards	1,037	1,096	1,146	889
Diluted weighted average ordinary shares outstanding	44,782	46,961	45,046	48,041
Income (loss) per share:
Income per share- basic	$ 0.76	$ 1.47	$ 4.80	$ 5.09
Income per share- diluted	$ 0.74	$ 1.43	$ 4.68	$ 4.99
Anti-dilutive shares excluded	200	0	200	0