10-Q

As filed with the Securities and Exchange Commission on November 9, 2018

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

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

For the quarterly period ended September 30, 2018

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: 001-36293

CONTINENTAL BUILDING PRODUCTS, INC.
(Exact name of registrant as specified in its charter)
Delaware	61-1718923
(State or other jurisdiction of incorporation)	(I.R.S Employer Identification No.)
12950 Worldgate Drive, Suite 700, Herndon, VA	20170
(Address of principal executive offices)	(Zip Code)
(703) 480-3800
(Registrant's telephone number, including the area code)

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    x    No    ¨

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted 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 such files).

Yes    x    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        x            Accelerated filer            ¨

Non-accelerated filer        ¨            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 check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes    ¨    No    x

As of November 5, 2018, the registrant had outstanding 36,841,935 shares of the registrant’s common stock, which amount excludes 7,987,968 shares of common stock held by the registrant as treasury shares.

1

Table of Contents to Third Quarter 2018 Form 10-Q

Part I - Financial Information		3
Item 1.	Financial Statements	3
	Consolidated Statements of Operations	3
	Consolidated Statements of Comprehensive Income	4
	Consolidated Balance Sheets	5
	Consolidated Statements of Cash Flows	6
	Notes to the Unaudited Consolidated Financial Statements	7
	1. Background and Nature of Operations	7
	2. Significant Accounting Policies	7
	3. Trade Receivables, Net	9
	4. Inventories, Net	9
	5. Property, Plant and Equipment, Net	10
	6. Customer Relationships and Other Intangibles, Net	10
	7. Investment in Seven Hills	11
	8. Accrued and Other Liabilities	11
	9. Debt	11
	10. Derivative Instruments	12
	11. Treasury Stock	13
	12. Share-Based Compensation	14
	13. Accumulated Other Comprehensive Loss	14
	14. Income Taxes	14
	15. Earnings Per Share	15
	16. Commitments and Contingencies	15
	17. Segment Reporting	16
	18. Fair Value Disclosures	18
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	19
	Overview	19
	Results of Operations	20
	Liquidity and Capital Resources	22
	Critical Accounting Policies and Estimates	23
	Forward-Looking Statements	24
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	25
Item 4.	Controls and Procedures	25
Part II - Other Information		26
Item 1.	Legal Proceedings	26
Item 1A.	Risk Factors	26
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	26
Item 3.	Defaults Upon Senior Securities	26
Item 4.	Mine Safety Disclosures	26
Item 5.	Other Information	26
Item 6.	Exhibits	27
	Signatures	28

2

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

Continental Building Products, Inc.

Consolidated Statements of Operations

(unaudited)

	For the Three Months Ended						For the Nine Months Ended
	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
	(in thousands, except share data and per share amounts)
Net sales	$	131,234		$	116,526		$	387,304		$	357,771
Costs, expenses and other income:
Cost of goods sold	94,306			87,952			279,185			267,393
Selling and administrative	9,957			8,867			29,826			27,364
Total costs and operating expenses	104,263			96,819			309,011			294,757
Operating income	26,971			19,707			78,293			63,014
Other (expense)/income, net	(29		)	146			(256		)	(633		)
Interest expense, net	(2,549		)	(2,988		)	(7,963		)	(8,966		)
Income before losses from equity method investment and provision for income taxes	24,393			16,865			70,074			53,415
Losses from equity method investment	(393		)	(204		)	(1,148		)	(29		)
Income before provision for income taxes	24,000			16,661			68,926			53,386
Provision for income taxes	(5,436		)	(5,674		)	(14,821		)	(17,774		)
Net income	$	18,564		$	10,987		$	54,105		$	35,612
Net income per share:
Basic	$	0.51		$	0.29		$	1.46		$	0.91
Diluted	$	0.50		$	0.29		$	1.46		$	0.91
Weighted average shares outstanding:
Basic	36,732,746			38,212,869			37,012,536			38,966,575
Diluted	36,918,904			38,345,556			37,181,387			39,080,973

See accompanying notes to unaudited consolidated financial statements.

3

Continental Building Products, Inc.

Consolidated Statements of Comprehensive Income

(unaudited)

	For the Three Months Ended					For the Nine Months Ended
	September 30, 2018			September 30, 2017		September 30, 2018			September 30, 2017
	(in thousands)
Net income	$	18,564		$	10,987	$	54,105		$	35,612
Foreign currency translation adjustment	298			695		(496		)	1,259
Net (losses)/gains on derivatives, net of taxes	(8		)	127		1,489			(451		)
Other comprehensive income	290			822		993			808
Comprehensive income	$	18,854		$	11,809	$	55,098		$	36,420

See accompanying notes to unaudited consolidated financial statements.

4

Continental Building Products, Inc.

Consolidated Balance Sheets

	September 30, 2018			December 31, 2017
	(unaudited)
	(in thousands)
Assets:
Cash and cash equivalents	$	105,452		$	72,521
Trade receivables, net	39,597			38,769
Inventories, net	32,439			24,882
Prepaid and other current assets	11,605			11,267
Total current assets	189,093			147,439
Property, plant and equipment, net	290,670			294,003
Customer relationships and other intangibles, net	64,661			70,807
Goodwill	119,945			119,945
Equity method investment	8,194			9,263
Debt issuance costs	341			477
Total Assets	$	672,904		$	641,934
Liabilities and Shareholders' Equity:
Liabilities:
Accounts payable	$	32,253		$	30,809
Accrued and other liabilities	13,239			11,940
Notes payable, current portion	1,670			1,702
Total current liabilities	47,162			44,451
Deferred taxes and other long-term liabilities	15,392			15,847
Notes payable, non-current portion	262,400			263,610
Total Liabilities	324,954			323,908
Shareholders' Equity:
Undesignated preferred stock, par value $0.001 per share; 10,000,000 shares authorized, no shares issued and outstanding	—			—
Common stock, $0.001 par value per share; 190,000,000 shares authorized; 44,422,804 and 44,321,776 shares issued and 36,681,879 and 37,532,959 shares outstanding as of September 30, 2018 and December 31, 2017, respectively	44			44
Additional paid-in capital	327,643			325,391
Less: Treasury stock	(170,782		)	(143,357		)
Accumulated other comprehensive loss	(1,656		)	(2,649		)
Accumulated earnings	192,701			138,597
Total Shareholders' Equity	347,950			318,026
Total Liabilities and Shareholders' Equity	$	672,904		$	641,934

See accompanying notes to unaudited consolidated financial statements.

5

Continental Building Products, Inc.

Consolidated Statements of Cash Flows

(unaudited)

	For the Nine Months Ended
	September 30, 2018			September 30, 2017
	(in thousands)
Cash flows from operating activities:
Net income	$	54,105		$	35,612
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	32,966			35,817
Amortization of debt issuance costs and debt discount	931			885
Losses from equity method investment	1,148			29
Amortization of deferred gain on terminated swaps	(632		)	—
Loss on debt extinguishment	—			686
Share-based compensation	2,459			2,101
Deferred taxes	(457		)	92
Change in assets and liabilities:
Trade receivables	(914		)	1,420
Inventories	(7,627		)	(872		)
Prepaid expenses and other current assets	1,264			(350		)
Accounts payable	(52		)	(87		)
Accrued and other current liabilities	1,089			4
Other long-term liabilities	(226		)	(245		)
Net cash provided by operating activities	84,054			75,092
Cash flows from investing activities:
Capital expenditures	(19,761		)	(14,077		)
Software purchased or developed	(1,359		)	(183		)
Proceeds from the sale of property, plant and equipment	125			—
Capital contributions to equity method investment	(548		)	(1,929		)
Distributions from equity method investment	468			641
Net cash used in investing activities	(21,075		)	(15,548		)
Cash flows from financing activities:
Proceeds from exercise of stock options	145			230
Tax withholdings on share-based compensation	(547		)	(240		)
Proceeds from debt refinancing	—			273,625
Disbursements for debt refinancing	—			(273,625		)
Payments of financing costs	—			(649		)
Principal payments for debt	(2,037		)	(2,052		)
Payments to repurchase common stock	(27,425		)	(49,128		)
Net cash used in financing activities	(29,864		)	(51,839		)
Effect of foreign exchange rates on cash and cash equivalents	(184		)	707
Net change in cash and cash equivalents	32,931			8,412
Cash, beginning of period	72,521			51,536
Cash, end of period	$	105,452		$	59,948

See accompanying notes to unaudited consolidated financial statements.

6

Continental Building Products, Inc.

Notes to the Unaudited Consolidated Financial Statements

1. BACKGROUND AND NATURE OF OPERATIONS

Description of Business

Continental Building Products, Inc. (the "Company") is a Delaware corporation. Prior to the acquisition of the gypsum division of Lafarge North America Inc. ("Lafarge N.A.") described below, the Company had no operating activity. The Company manufactures gypsum wallboard related products for commercial and residential buildings and houses. The Company operates a network of three highly efficient wallboard facilities, all located in the eastern United States, and produces joint compound at one plant in the United States and at another plant in Canada.

The Acquisition

On June 24, 2013, the Company's former controlling stockholder entered into a definitive agreement with Lafarge N.A. to purchase the assets of its North American gypsum division for an aggregate purchase price of approximately $703 million (the "Acquisition") in cash. The closing of the Acquisition occurred on August 30, 2013.

2. SIGNIFICANT ACCOUNTING POLICIES

(a) Basis of Presentation

The accompanying consolidated financial statements for the Company have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP"). The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions have been eliminated.

(b) Basis of Presentation for Interim Periods

Certain information and footnote disclosures normally included for the annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted for the interim periods presented. Management believes that the unaudited interim financial statements include all adjustments (which are normal and recurring in nature) necessary to present fairly the financial position of the Company and the results of operations and cash flows for the periods presented.

The results of operations for the periods presented are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. Seasonal changes and other conditions can affect the sales volumes of the Company's products. Therefore, the financial results for any interim period do not necessarily indicate the expected results for the year.

The financial statements should be read in conjunction with Company's audited consolidated financial statements and the notes thereto for the year ended December 31, 2017 included in the Company's Annual Report on Form 10-K for the fiscal year then ended. The Company has continued to follow the accounting policies set forth in those financial statements.

(c) Revenue Disclosure

Revenue from the sale of gypsum products is recognized when control of the promised products is transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those products (the transaction price). A performance obligation is a promise in a contract to transfer a distinct product to a customer and is the unit of account under Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 606. Control transfers to the customer at a point in time. To indicate the transfer of control, the Company must have a present right to payment, legal title must have passed to the customer and the customer must have the significant risks and rewards of ownership. Generally, the Company satisfies its performance obligations within a number of days from the time the contract is executed.

The Company records estimated reductions to revenue for customer programs and incentive offerings, including promotions and other volume-based incentives, in the period in which the sale occurs.

Amounts billed to a customer at the transaction price are included in net sales, and costs incurred for shipping and handling are treated as fulfillment costs and are classified as cost of goods sold in the Consolidated Statements of Operations. See Note 17, Segment reporting, for disaggregation of revenue by segment.

As of September 30, 2018, accounts receivables were $39.6 million. The Company had no material contract assets, contract liabilities or deferred contract costs recorded on the Consolidated Balance Sheets as of September 30, 2018. The Company does not have any material payment terms as payment is received shortly after the point of sale.

7

(d) Supplemental Cash Flow Disclosure

Table 2.1: Certain Cash Transactions and Other Activity
	For the Nine Months Ended
	September 30, 2018		September 30, 2017
	(in thousands)
Cash paid during the period for:
Interest paid on term loan, net	$	8,049	$	7,582
Income taxes paid, net	15,903		16,338
Other activity:
Amounts in accounts payable for capital expenditures	1,538		1,123

(e) Recent Accounting Pronouncements

Accounting Standards Recently Adopted

In May 2014, the FASB issued ASU No. 2014-9, "Revenue from Contracts with Customers (Topic 606)," which provides accounting guidance for all revenue arising from contracts with customers and affects all entities that enter into contracts to provide goods or services to their customers. In August 2015, the FASB issued ASU No. 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date," which deferred the effective date of ASU No. 2014-9 for all entities by one year to annual reporting periods beginning after December 15, 2017. The ASU requires retroactive application on either a full or modified basis. The Company adopted the standard on January 1, 2018 using the modified retrospective approach. Based on its evaluation, the Company has concluded it has one revenue stream and the adoption of this new guidance did not have a material impact on its Consolidated Financial Statements.

In August 2016, the FASB issued ASU 2016-15, "Classification of Certain Cash Receipts and Cash Payments." This ASU reduces existing diversity in the classification of certain cash receipts and cash payments on the statements of cash flows. ASU 2016-15 is effective for fiscal years beginning after December 15, 2017, and for interim periods within those fiscal years. The adoption of this standard did not have a material impact on the Company's Consolidated Financial Statements.

In October 2016, the FASB issued ASU 2016-16, "Intra-Entity Transfers of Assets Other Than Inventory." The new standard requires companies to recognize the income tax effects of intercompany sales or transfers of assets, other than inventory, in the income statement as income tax expense (or benefit) in the period the sales or transfer occurs. The standard requires companies to apply a modified retrospective approach with a cumulative catch-up adjustment to opening retained earnings in the period of adoption. The provisions of this standard are effective for fiscal years beginning after December 15, 2017, and early adoption is permitted. The adoption of this standard did not have a material impact on the Company's Consolidated Financial Statements.

Accounting Standards Not Yet Adopted

In February 2016, the FASB issued ASU 2016-02, "Leases." ASU 2016-02 requires lessees to recognize a lease liability and a right-of-use asset on the balance sheet. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company will adopt the standard on January 1, 2019.

The Company will take advantage of the transition package of practical expedients permitted within the new standard, which among other things, allows companies to carryforward the historical lease classification. In addition, the Company is electing the comparative period practical expedient, which allows the Company to implement the guidance as of the effective date without having to adjust the comparative financial statements. Instead, under this expedient, companies will recognize the cumulative effect adjustment in equity. The Company will also make an accounting policy election that leases with an initial term of 12 months or less will not be recorded on the balance sheet and will result in the recognition of those lease payments in the Consolidated Statements of Operations on a straight-line basis over the lease term. While the Company is continuing to evaluate the impact of adoption, it is not expected to have a material impact on its Consolidated Financial Statements.

In June 2016, the FASB issued ASU 2016-13, "Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments." This ASU is intended to introduce a revised approach to the recognition and measurement of credit losses, emphasizing an updated model based on expected losses rather than incurred losses. The provisions of this standard are effective for reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

8

In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities." This ASU expands an entity's ability to hedge non-financial and financial risk components and reduce complexity in fair value hedges of interest rate risk. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The provisions of this standard are effective in 2019 for calendar-year public business entities and in 2020 for all other calendar-year companies. Early adoption of the standard is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In February 2018, the FASB issued ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220), Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." This ASU allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The provisions of this standard are effective for reporting periods beginning after December 15, 2018 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurements (Topic 820), Changes to the Disclosure Requirements for Fair Value Measurement." This ASU eliminates certain disclosure requirements for fair value measurements for all entities, requires public entities to disclose certain new information and modifies some disclosure requirements. The provisions of this standard are effective for reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-15, "Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." This ASU requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in Accounting Standards Codification 350-40 to determine which implementation costs to defer and recognize as an asset. The provisions of this standard are effective for reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

(f) Reclassifications

Certain reclassifications of prior year information were made to conform to the 2018 presentation. These reclassifications had no material impact on the Company's Consolidated Financial Statements.

3. TRADE RECEIVABLES, NET

Table 3: Details of Trade Receivables, Net
	September 30, 2018			December 31, 2017
	(in thousands)
Trade receivables, gross	$	40,447		$	39,577
Allowance for cash discounts and doubtful accounts	(850		)	(808		)
Trade receivables, net	$	39,597		$	38,769

Trade receivables are recorded net of credit memos issued during the normal course of business.

4. INVENTORIES, NET

Table 4: Details of Inventories, Net
	September 30, 2018		December 31, 2017
	(in thousands)
Finished products	$	8,195	$	5,893
Raw materials	16,821		11,663
Supplies and other	7,423		7,326
Inventories, net	$	32,439	$	24,882

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5. PROPERTY, PLANT AND EQUIPMENT, NET

Table 5: Details of Property, Plant and Equipment, Net
	September 30, 2018			December 31, 2017
	(in thousands)
Land	$	13,187		$	13,187
Buildings	115,422			114,051
Plant machinery	284,151			281,786
Mobile equipment	12,828			10,366
Construction in progress	32,186			20,291
Property, plant and equipment, at cost	457,774			439,681
Accumulated depreciation	(167,104		)	(145,678		)
Property, plant and equipment, net	$	290,670		$	294,003

Depreciation expense was $9.1 million and $25.4 million for the three and nine months ended September 30, 2018, respectively, compared to $9.0 million and $26.5 million for the three and nine months ended September 30, 2017, respectively.

6. CUSTOMER RELATIONSHIPS AND OTHER INTANGIBLES, NET

Table 6.1: Details of Customer Relationships and Other Intangibles, Net
	September 30, 2018							December 31, 2017
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	(in thousands)
Customer relationships	$	116,529	$	(64,041	)	$	52,488	$	116,711	$	(57,811	)	$	58,900
Purchased and internally developed software	7,718		(5,340		)	2,378		6,226		(4,871		)	1,355
Trademarks	14,816		(5,021		)	9,795		14,839		(4,287		)	10,552
Total	$	139,063	$	(74,402	)	$	64,661	$	137,776	$	(66,969	)	$	70,807

Amortization expense was $2.5 million and $7.5 million for the three and nine months ended September 30, 2018, respectively, compared to $3.0 million and $9.3 million for the three and nine months ended September 30, 2017, respectively.

Table 6.2: Details of Future Amortization Expense of Customer Relationships and Other Intangibles
	As of September 30, 2018
	(in thousands)
October 1, 2018 through December 31, 2018	$	2,766
2019	8,907
2020	8,150
2021	7,410
2022	6,746
Thereafter	30,682
Total	$	64,661

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7. INVESTMENT IN SEVEN HILLS

The Company is a party with an unaffiliated third party to a paperboard liner venture named Seven Hills Paperboard, LLC ("Seven Hills") that, pursuant to a paper supply agreement, provides the Company with a continuous supply of high-quality recycled paperboard liner to meet its ongoing production requirements.

The Company has evaluated the characteristics of its investment and determined that Seven Hills is a variable interest entity, but that it does not have the power to direct the principal activities most impacting the economic performance of Seven Hills, and is thus not the primary beneficiary. As such, the Company accounts for this investment in Seven Hills under the equity method of accounting.

Paperboard liner purchased from Seven Hills was $12.3 million and $37.4 million for the three and nine months ended September 30, 2018, respectively, compared to $15.5 million and $42.3 million for the three and nine months ended September 30, 2017, respectively. As of September 30, 2018, the Company had certain purchase commitments for paper totaling $29.2 million through 2021.

8. ACCRUED AND OTHER LIABILITIES

Table 8: Details of Accrued and Other Liabilities
	September 30, 2018		December 31, 2017
	(in thousands)
Employee-related costs	$	8,471	$	9,258
Property taxes	2,321		472
Other taxes	562		466
Other	1,885		1,744
Accrued and other liabilities	$	13,239	$	11,940

9. DEBT 

Table 9.1: Details of Debt
	September 30, 2018			December 31, 2017
	(in thousands)
Amended and Restated Credit Agreement (1)	$	269,536		$	271,573
Less: Original issue discount (net of amortization)	(1,442		)	(1,681		)
Less: Debt issuance costs	(4,024		)	(4,580		)
Total debt	264,070			265,312
Less: Current portion of long-term debt	(1,670		)	(1,702		)
Long-term debt	$	262,400		$	263,610

(1) As of September 30, 2018 and December 31, 2017, the Amended and Restated Credit Agreement, as amended, had a maturity date of August 18, 2023 and an interest rate of LIBOR (with a 0.75% floor) plus 2.25%.

On August 18, 2016, the Company, Continental Building Products Operating Company, LLC and Continental Building Products Canada Inc. and the lenders party thereto and Credit Suisse, as Administrative Agent, entered into an Amended and Restated Credit Agreement amending and restating the Company's First Lien Credit Agreement (the "Amended and Restated Credit Agreement"). The Amended and Restated Credit Agreement provides for a $275 million senior secured first lien term loan facility and a $75 million senior secured revolving credit facility (the "Revolver"), which mature on August 18, 2023 and August 18, 2021, respectively. The interest rate under the Amended and Restated Credit Agreement was a spread over LIBOR of 2.75% and floor of 0.75%.

On February 21, 2017, the Company repriced its term loan under the Amended and Restated Credit Agreement lowering its interest rate by 25 basis points to LIBOR plus 2.50%. Subsequently, on December 6, 2017, the Company further repriced its term loan under the Amended and Restated Credit Agreement lowering its interest rate by an additional 25 basis points to LIBOR plus 2.25%. The Company may further reduce its interest rate to LIBOR plus 2.00% based on the attainment of a total leverage ratio of 1.1 or better. All other terms and conditions under the Amended and Restated Credit Agreement remained the same.

11

During both the nine months ended September 30, 2018 and 2017, the Company made $2.0 million of scheduled mandatory principal payments. As of September 30, 2018, the annual effective interest rate, including original issue discount and amortization of debt issuance costs, was 5.0%.

There were no amounts outstanding under the Revolver as of September 30, 2018 or 2017. During the nine months ended September 30, 2018 and 2017, the Company did not have any draws under the Revolver. Interest under the Revolver is floating, based on LIBOR plus 2.25%. In addition, the Company pays a facility fee of 50 basis points per annum on the total capacity under the Revolver. Availability under the Revolver as of September 30, 2018, based on draws and outstanding letters of credit and absence of violations of covenants, was $73.6 million.

Table 9.2: Details of Future Minimum Principal Payments Due Under the Amended and Restated Credit Agreement
	Amount Due
	(in thousands)
October 1, 2018 through December 31, 2018	$	679
2019	2,716
2020	2,716
2021	2,716
2022	2,716
Thereafter	257,993
Total Payments	$	269,536

Under the terms of the Amended and Restated Credit Agreement, the Company is required to comply with certain covenants, including among others, the limitation of indebtedness, limitation on liens, and limitations on certain cash distributions. One single financial covenant governs all of the Company's debt and only applies if the outstanding borrowings of the Revolver plus outstanding letters of credit are greater than $22.5 million as of the end of the quarter. The financial covenant is a total leverage ratio calculation, in which total debt less outstanding cash is divided by adjusted earnings before interest, taxes, depreciation and amortization. As the sum of outstanding borrowings under the Revolver and outstanding letters of credit were less than $22.5 million at September 30, 2018, the total leverage ratio of no greater than 5.0 under the financial covenant was not applicable at September 30, 2018. The Company was in compliance with all applicable covenants under the Amended and Restated Credit Agreement as of September 30, 2018.

10. DERIVATIVE INSTRUMENTS

Commodity Derivative Instruments

As of September 30, 2018, the Company had 2.1 million mmBTUs (millions of British Thermal Units) in aggregate notional amount outstanding natural gas swap contracts to manage commodity price exposures. All of these contracts mature by July 31, 2019. The Company elected to designate these derivative instruments as cash flow hedges in accordance with ASC 815-20, "Derivatives – Hedging". No ineffectiveness was recorded on these contracts during the three and nine months ended September 30, 2018 and 2017.

Interest Rate Derivative Instrument

In September 2016, the Company entered into interest rate swap agreements for a combined notional amount of $100.0 million with a term of four years, which hedged the floating LIBOR on a portion of the term loan under the Amended and Restated Credit Agreement to an average fixed rate of 1.323% and LIBOR floor of 0.75%. The Company elected to designate these interest rate swaps as cash flow hedges for accounting purposes.

On March 29, 2018, the Company terminated its interest rate swap agreements that were previously designated as a cash flow hedge and received $3.2 million in cash, the fair value of the swap on the termination date. The unrealized gain at termination remains in accumulated other comprehensive income and will be amortized into interest expense over the life of the original hedged instrument. On the same date, the Company entered into new interest rate swap agreements for a combined notional amount of $100.0 million, which expire on September 30, 2020 and hedge the floating LIBOR on a portion of the term loan under the Amended and Restated Credit Agreement to an average fixed rate of 2.46% and LIBOR floor of 0.75%. The Company elected to designate these interest rate swaps as cash flow hedges for accounting purposes. No ineffectiveness was recorded on these contracts during the three and nine months ended September 30, 2018 and 2017.

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Table 10.1: Details of Derivatives Fair Value
	September 30, 2018		December 31, 2017
	(in thousands)
Assets
Interest rate swap	$	697	$	2,148
Commodity hedges	77		11
Total assets	$	774	$	2,159
Liabilities
Interest rate swap	$	—	$	—
Commodity hedges	5		613
Total liabilities	$	5	$	613

Table 10.2: Gains/(Losses) on Derivatives
	For the Three Months Ended September 30,											For the Nine Months Ended September 30,
	2018		2017			2018			2017			2018		2017			2018			2017
	Gain/(loss) recognized in Other comprehensive income on derivatives (effective portion), net of tax					Gain/(loss) reclassified from Accumulated other comprehensive loss into income (effective portion), net of tax						Gain/(loss) recognized in Other comprehensive income on derivatives (effective portion), net of tax					Gain/(loss) reclassified from Accumulated other comprehensive loss into income (effective portion), net of tax
	(in thousands)
Interest rate swap	$	145	$	37		$	169		$	(7	)	$	1,413	$	(318	)	$	379		$	(133	)
Commodity hedges	7		(44		)	(9		)	(127		)	251		(304		)	(204		)	(38		)
Total	$	152	$	(7	)	$	160		$	(134	)	$	1,664	$	(622	)	$	175		$	(171	)

Counterparty Risk

The Company is exposed to credit losses in the event of nonperformance by the counterparties to the Company's derivative instruments. As of September 30, 2018, the Company's derivatives were in a $0.8 million net asset position and recorded in Other current assets. All of the Company's counterparties have investment grade credit ratings; accordingly, the Company anticipates that the counterparties will be able to fully satisfy their obligations under the contracts. The Company's agreements outline the conditions upon which it or the counterparties are required to post collateral. As of September 30, 2018, the Company had no collateral posted with its counterparties related to the derivatives.

11. TREASURY STOCK

On November 4, 2015, the Company announced that the Board of Directors approved a new stock repurchase program authorizing the Company to repurchase up to $50 million of its common stock, at such times and prices as determined by management as market conditions warrant, through December 31, 2016. Pursuant to this authorization, the Company has repurchased shares of its common stock in the open market and in private transactions.

During 2017 and 2018, the Company announced two expansions and extensions of its stock repurchase program. The most recent authorization on February 21, 2018 expanded the program to a total of $300 million and also extended the expiration date to December 31, 2019.

All repurchased shares are held in treasury, reducing the number of shares of common stock outstanding and used in the Company's earnings per share calculation.

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Table 11: Details of Treasury Stock Activity
	September 30, 2018					September 30, 2017
	Shares	Amount (1)		Average Share Price (1)		Shares	Amount (1)		Average Share Price (1)
	(in thousands, except share data)
For the Three Months Ended:
Beginning Balance	7,664,325	$	167,919	$	21.91	5,648,778	$	116,592	$	20.64
Repurchases on open market	76,600	2,863		37.38		941,039	21,292		22.63
Ending Balance	7,740,925	$	170,782	$	22.06	6,589,817	$	137,884	$	20.92
For the Nine Months Ended:
Beginning Balance	6,788,817	$	143,357	$	21.12	4,499,655	$	88,756	$	19.73
Repurchases on open market	952,108	27,425		28.80		2,090,162	49,128		23.50
Ending Balance	7,740,925	$	170,782	$	22.06	6,589,817	$	137,884	$	20.92
(1) Includes commissions paid for repurchases on open market.

12. SHARE-BASED COMPENSATION

For the three and nine months ended September 30, 2018, the Company recognized share-based compensation expenses of $0.8 million and $2.5 million in expense, respectively, compared to $0.6 million and $2.1 million for the three and nine months ended September 30, 2017, respectively. The expenses related to share-based compensation awards were recorded in selling and administrative expenses. As of September 30, 2018, there was $5.5 million of total unrecognized compensation cost related to non-vested stock options, restricted stock awards, restricted stock units and performance-based restricted stock units. This cost is expected to be recognized over a weighted average period of 2.3 years.

13. ACCUMULATED OTHER COMPREHENSIVE LOSS

Table 13: Details of Changes in Accumulated Other Comprehensive Loss by Category
	Foreign currency translation adjustment			Net unrealized gain on derivatives, net of tax			Total
	(in thousands)
Balance as of December 31, 2017	$	(3,636	)	$	987		$	(2,649	)
Other comprehensive (loss)/income before reclassifications	(496		)	1,664			1,168
Amounts reclassified from accumulated other comprehensive loss	—			(175		)	(175		)
Net current period other comprehensive (loss)/income	(496		)	1,489			993
Balance as of September 30, 2018	$	(4,132	)	$	2,476		$	(1,656	)

14. INCOME TAXES

The Company’s estimated annual effective tax rate is 22.3% before discrete items. For the nine months ended September 30, 2018, discrete items resulted in a tax benefit of $0.6 million, consisting of a stock compensation windfall of $0.1 million and a non-recurring benefit of $0.5 million related to re-measurement of deferred taxes resulting from state tax law change. Due to the timing of the enactment and the complexity involved in applying the provisions of the Tax Cuts and Jobs Act of 2017 (the "Act"), the Company calculated its best estimate of the impact of the Act in its 2017 year end income tax provision in accordance with its understanding of the Act and guidance available as of the date of its Annual Report on Form 10-K for fiscal year 2017 and as a result had recorded a provisional $9.2 million reduction in income tax expense in the fourth quarter of 2017. No adjustment was made to the provisional amount as a result of additional information obtained for the nine months ended  September 30, 2018.

The Company is subject to audit examinations at federal, state and local levels by tax authorities in those jurisdictions. In addition, the Canadian operations are subject to audit examinations at federal and provincial levels by tax authorities in those jurisdictions. The tax matters challenged by the tax authorities are typically complex; therefore, the ultimate outcome of any

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challenges would be subject to uncertainty. The Company has not identified any issues that did not meet the recognition threshold or would be impacted by the measurement provisions of the uncertain tax position guidance.

15. EARNINGS PER SHARE

The following table shows the weighted average number of shares used in computing earnings per share and the effect on the weighted average number of shares of potentially dilutive securities. Potentially dilutive common stock has no effect on income available to common stockholders. There were no anti-dilutive awards during the three months ended September 30, 2018 and 2017. For the nine months ended September 30, 2018 and 2017, awards that had an anti-dilutive impact on the Company's dilutive earnings per share computation excluded from the weighted average shares outstanding were 21,000 and 29,000, respectively.

Table 15: Details of Basic and Dilutive Earnings Per Share
	For the Three Months Ended				For the Nine Months Ended
	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
	(dollars in thousands, except for per share amounts)
Net income	$	18,564	$	10,987	$	54,105	$	35,612
Weighted average number of shares outstanding - basic	36,732,746		38,212,869		37,012,536		38,966,575
Effect of dilutive securities:
Restricted stock awards	—		6,852		1,170		7,598
Restricted stock units	89,750		48,175		72,650		54,171
Performance restricted stock units	68,384		58,199		67,231		30,853
Stock options	28,024		19,461		27,800		21,776
Total effect of dilutive securities	186,158		132,687		168,851		114,398
Weighted average number of shares outstanding - diluted	36,918,904		38,345,556		37,181,387		39,080,973
Basic earnings per share	$	0.51	$	0.29	$	1.46	$	0.91
Diluted earnings per share	$	0.50	$	0.29	$	1.46	$	0.91

16. COMMITMENTS AND CONTINGENCIES

Commitments

The Company leases certain buildings and equipment. The Company's facility and equipment leases may provide for escalations of rent or rent abatements and payment of pro rata portions of building operating expenses. Minimum lease payments are recognized on a straight-line basis over the minimum lease term. The total expenses under operating leases for the three and nine months ended September 30, 2018 were $0.6 million and $2.2 million, respectively, compared to $0.8 million and $2.5 million for the same periods in 2017, respectively. The Company also has non-capital purchase commitments that primarily relate to gas, gypsum, paper and other raw materials. The total amounts purchased under such commitments were $22.7 million and $69.5 million for the three and nine months ended September 30, 2018, respectively, compared to $22.0 million and $64.8 million for the three and nine months ended September 30, 2017, respectively.

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Table 16: Details of Future Minimum Lease Payments Due Under Noncancellable Operating Leases and Purchase Commitments
	Future Minimum Lease Payments		Purchase Commitments
	(in thousands)
October 1, 2018 - December 31, 2018	$	180	$	17,958
2019	1,658		47,287
2020	48		46,141
2021	—		28,097
2022	—		25,069
2023	—		12,284
Thereafter	—		53,621
Total	$	1,886	$	230,457

Contingent obligations

Under certain circumstances, the Company provides letters of credit related to its natural gas and other supply purchases. As of September 30, 2018 and December 31, 2017, the Company had outstanding letters of credit of approximately $1.4 million.

Legal Matters

In the ordinary course of business, the Company executes contracts involving indemnifications standard in the industry. These indemnifications might include claims relating to any of the following: environmental and tax matters; intellectual property rights; governmental regulations and employment-related matters; customer, supplier, and other commercial contractual relationships; and financial matters. While the maximum amount to which the Company may be exposed under such agreements cannot be estimated, it is the opinion of management that these guarantees and indemnifications are not expected to have a material adverse effect on the Company's financial condition, results of operations or liquidity.

In the ordinary course of business, the Company is involved in certain legal actions and claims, including proceedings under laws and regulations relating to environmental and other matters. Because such matters are subject to many uncertainties and the outcomes are not predictable with assurance, the total liability for these legal actions and claims cannot be determined with certainty. When the Company determines that it is probable that a liability for environmental matters, legal actions or other contingencies has been incurred and the amount of the loss is reasonably estimable, an estimate of the costs to be incurred is recorded as a liability in the financial statements. As of September 30, 2018 and December 31, 2017, such liabilities were not expected to have a material adverse effect on the Company's financial condition, results of operations or liquidity. While management believes its accruals for such liabilities are adequate, the Company may incur costs in excess of the amounts provided. Although the ultimate amount of liability that may result from these matters or actions is not ascertainable, any amounts exceeding the recorded accruals are not expected to have a material adverse effect on the Company's financial condition, results of operations or liquidity.

17. SEGMENT REPORTING

Segment information is presented in accordance with ASC 280, Segment Reporting, which establishes standards for reporting information about operating segments. It also establishes standards for related disclosures about products and geographic areas. The Company's primary reportable segment is wallboard, which represented approximately 97.6% and 97.3% of the Company's revenues for the three and nine months ended September 30, 2018, respectively, compared to 96.8% of the Company's revenues for both the three and nine months ended September 30, 2017, respectively. This segment produces wallboard for the commercial and residential construction sectors. The Company also manufactures finishing products, which complement the Company's full range of wallboard products.

Revenues from the major products sold to external customers include gypsum wallboard and finishing products.

The Company's two geographic areas consist of the United States and Canada for which it reports net sales, fixed assets and total assets.

The Company evaluates operating performance based on profit or loss from operations before certain adjustments as shown below. Revenues are attributed to geographic areas based on the location of the customer generating the revenue. The Company did not provide asset information by segment as its Chief Operating Decision Maker does not use such information for purposes of allocating resources and assessing segment performance.

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Table 17.1: Segment Reporting
	For the Three Months Ended						For the Nine Months Ended
	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
	(in thousands)
Net Sales:
Wallboard	$	128,101		$	112,796		$	376,739		$	346,466
Other	3,133			3,730			10,565			11,305
Total net sales	$	131,234		$	116,526		$	387,304		$	357,771
Operating Income:
Wallboard	$	27,551		$	19,992		$	79,702		$	63,402
Other	(580		)	(285		)	(1,409		)	(388		)
Total operating income	$	26,971		$	19,707		$	78,293		$	63,014
Adjustments:
Interest expense	$	(2,549	)	$	(2,988	)	$	(7,963	)	$	(8,966	)
Losses from equity investment	(393		)	(204		)	(1,148		)	(29		)
Other (expense)/income, net	(29		)	146			(256		)	(633		)
Income before provision for income taxes	$	24,000		$	16,661		$	68,926		$	53,386
Depreciation and Amortization:
Wallboard	$	11,299		$	11,793		$	32,016		$	34,992
Other	281			264			950			825
Total depreciation and amortization	$	11,580		$	12,057		$	32,966		$	35,817

Table 17.2: Details of Net Sales By Geographic Region
	For the Three Months Ended				For the Nine Months Ended
	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
	(in thousands)
United States	$	125,430	$	110,430	$	367,917	$	334,481
Canada	5,804		6,096		19,387		23,290
Net sales	$	131,234	$	116,526	$	387,304	$	357,771

Table 17.3: Details of Assets By Geographic Region
	Fixed Assets				Total Assets
	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
	(in thousands)
United States	$	287,255	$	290,324	$	654,965	$	622,836
Canada	3,415		3,679		17,939		19,098
Total	$	290,670	$	294,003	$	672,904	$	641,934

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18. FAIR VALUE DISCLOSURES

The Company estimates the fair value of its debt by discounting the future cash flows of each instrument using estimated market rates of debt instruments with similar maturities and credit profiles. These inputs are classified as Level 3 within the fair value hierarchy. As of September 30, 2018 and December 31, 2017, the carrying value reported in the consolidated balance sheet for the Company's notes payable approximated its fair value. The only assets or liabilities the Company had at September 30, 2018 that are recorded at fair value on a recurring basis are the natural gas hedges and interest rate swaps. Generally, the Company obtains its Level 2 pricing inputs from its counterparties. Substantially all of these assumptions are observable in the marketplace throughout the full term of the instrument, can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace.

Assets and liabilities that are measured at fair value on a non-recurring basis include intangible assets and goodwill. These items are recognized at fair value when they are considered to be impaired.

There were no fair value adjustments for assets and liabilities measured on a non-recurring basis. The Company discloses fair value information about financial instruments for which it is practicable to estimate that value.

Table 18.1: Fair Value Hierarchy - 2018
	As of September 30, 2018
	Level 1		Level 2		Level 3		Balance
	(in thousands)
Asset
Interest rate swap	$	—	$	697	$	—	$	697
Commodity derivatives	—		77		—		77
Total assets	$	—	$	774	$	—	$	774
Liabilities
Interest rate swap	$	—	$	—	$	—	$	—
Commodity derivatives	—		5		—		5
Total liabilities	$	—	$	5	$	—	$	5

Table 18.2: Fair Value Hierarchy - 2017
	As of December 31, 2017
	Level 1		Level 2		Level 3		Balance
	(in thousands)
Asset
Interest rate swap	$	—	$	2,148	$	—	$	2,148
Commodity derivatives	—		11		—		11
Total assets	$	—	$	2,159	$	—	$	2,159
Liabilities
Interest rate swap	$	—	$	—	$	—	$	—
Commodity derivatives	—		613		—		613
Total liabilities	$	—	$	613	$	—	$	613

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

The following discussion and analysis is intended to help the reader understand our business, financial condition, results of operations, liquidity and capital resources. You should read this discussion in conjunction with "Risk Factors," "Forward-Looking Statements," "Selected Historical Financial and Operating Data," and our financial statements and related notes included in our Annual Report on Form 10-K for fiscal year 2017 filed with the Securities and Exchange Commission on February 23, 2018 (the "2017 Form 10-K") and elsewhere in this Quarterly Report on Form 10-Q, as applicable.

Overview

We are a leading manufacturer of gypsum wallboard and complementary finishing products in the eastern United States and eastern Canada. We operate highly efficient and automated manufacturing facilities that produce a full range of gypsum wallboard products for our diversified customer base. We sell our products in the new residential, repair and remodel, or R&R, and commercial construction markets.

Our primary reportable segment is wallboard, which accounted for approximately 97.6% and 97.3% of our net sales for the three and nine months ended September 30, 2018, respectively, compared to 96.8% and 96.8% of our net sales for the three and nine months ended September 30, 2017, respectively. We also operate other business activities, primarily the production of finishing products, which complement our full range of wallboard products. See Note 17 to the Consolidated Financial Statements for additional information on our reporting segments.

Factors Affecting Our Results

Market

For the new residential construction market, housing starts are a good indicator of demand for our gypsum products. Installation of our gypsum products into a single family home typically follows a housing start by 90 to 120 days. The R&R market includes renovation of both residential and nonresidential buildings. Many buyers begin to remodel an existing home within two years of purchase. The generally rising levels of existing home sales and home resale values in recent years have contributed to an increase in demand for our products from the R&R market. The commercial construction market encompasses areas such as office, retail, heath care, hospitality, educational and government projects. Demand for our products from commercial construction typically follows signing of construction contracts by 12 to 18 months.

The rate of growth in the new residential construction market, R&R market, and the new nonresidential construction market remains uncertain and will depend on broader economic circumstances, including employment, household formation, the home ownership rate, existing home price trends, availability of mortgage financing, interest rates, consumer confidence, job growth, availability of skilled labor and discretionary business investment.

Wallboard pricing can be impacted by overall industry capacity in the United States. Currently, there is excess wallboard production capacity industry-wide in the United States which can lead to downward pressure on wallboard prices. We estimate that industry capacity utilization was approximately 73% and 74% for the three and nine months ended September 30, 2018, respectively, compared to 75% and 74% for the same periods of 2017.

Market Outlook

Most forecasts continue to project growth in housing starts. Industry Analysts' forecasts for 2018 housing starts in the United States included in the most recent Blue Chip Economic Indicators are 1.26 million to 1.30 million units, based on the average of the bottom ten and top ten forecasts included in the report, respectively. This forecast range represents an increase in the range of 5% and 8% over 2017 housing starts of 1.20 million. We also expect that the R&R and new commercial construction markets will continue to experience moderate growth.

Industry shipments of gypsum wallboard in the United States as reported by the Gypsum Association were an estimated 6.2 billion square feet for the three months ended September 30, 2018, down 1.8% from the same prior year period. For the nine months ended September 30, 2018, industry shipments were 18.8 billion square feet, up 1.4% from the same prior year period. We estimate that industry shipments in the United States for all of 2018 to increase in the low single digits from 25.3 billion square feet in 2017.

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Manufacturing Costs

Paper and synthetic gypsum are our principal wallboard raw materials. Paper constitutes our most significant input cost and the most significant driver of our variable manufacturing costs. Energy costs, consisting of natural gas and electricity, are the other key input costs. In total, manufacturing cash costs represented 63% and 64% of our costs of goods sold for the three and nine months ended September 30, 2018, respectively, compared to 64% for both three and nine months ended September 30, 2017. Depreciation and amortization represented 12% and 11% of our costs of goods sold for the three and nine months ended September 30, 2018, respectively, compared to 13% of our cost of goods sold for both three and nine months ended September, 2017. Distribution costs to deliver products to our customers represented 25% of our costs of goods sold for the three and nine months ended September 30, 2018, compared to 23% for the same periods of 2017.

Variable manufacturing costs, including inputs such as paper, gypsum, natural gas, and other raw materials, represented 67% and 68% of our manufacturing cash costs for the three and nine months ended September 30, 2018, respectively, compared to 70% for both the three and nine months ended September 30, 2017. Fixed production costs excluding depreciation and amortization consisted of labor, maintenance, and other costs that represented 33% and 32% of our manufacturing cash costs for the three and nine months ended September 30, 2018, respectively, compared to 30% for both the three and nine months ended September 30, 2017. Recently we have experienced increases in the costs of production, including for certain raw materials such as gypsum, and in the costs of freight to deliver products to our customers. We expect to experience continued inflationary pressures for the foreseeable future.

We currently purchase most of our paperboard liner from Seven Hills, a joint venture between us and WestRock Company. Under the paper supply agreement with Seven Hills, the price of paper adjusts based on changes in the underlying costs of production of the paperboard liner, of which the two most significant are recovered waste paper and natural gas. The largest waste paper source used by the operation is old cardboard containers (known as OCC). Seven Hills has the capacity to supply us with approximately 80% of our paper needs at our full capacity utilization and most of our needs at current capacity utilization on market-based pricing terms. We also purchase additional paper on the spot market at competitive prices. See Note 7 to the Consolidated Financial Statements for additional information regarding our investment in Seven Hills.

Results of Operations

Table M1: Results of Operations
	For the Three Months Ended						For the Nine Months Ended
	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
	(dollars in thousands, except mill net)
Net sales	$	131,234		$	116,526		$	387,304		$	357,771
Costs, expenses and other income:
Cost of goods sold	94,306			87,952			279,185			267,393
Selling and administrative	9,957			8,867			29,826			27,364
Total costs and operating expenses	104,263			96,819			309,011			294,757
Operating income	26,971			19,707			78,293			63,014
Other (expense)/income, net	(29		)	146			(256		)	(633		)
Interest expense, net	(2,549		)	(2,988		)	(7,963		)	(8,966		)
Income before losses from equity method investment and provision for income taxes	24,393			16,865			70,074			53,415
Losses from equity method investment	(393		)	(204		)	(1,148		)	(29		)
Income before provision for income taxes	24,000			16,661			68,926			53,386
Provision for income taxes	(5,436		)	(5,674		)	(14,821		)	(17,774		)
Net income	$	18,564		$	10,987		$	54,105		$	35,612
Other operating data:
Capital expenditures and software purchased or developed	$	7,324		$	6,057		$	21,120		$	14,260
Wallboard sales volume (million square feet)	674			644			2,011			1,941
Mill net sales price (1)	$	155.43		$	144.90		$	153.70		$	147.72

(1) Mill net sales price represents average selling price per thousand square feet net of freight and delivery costs.

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Three Months Ended September 30, 2018 Compared to Three Months Ended September 30, 2017

Net Sales.Net sales increased by $14.7 million, up12.6% from $116.5 million for the three months ended September 30, 2017, to $131.2 million for the three months ended September 30, 2018. The increase was primarily attributable to a $10.2 million favorable impact of an increase in the average net selling price for gypsum wallboard at constant exchange rates and a $5.3 million favorable impact of higher wallboard volumes driven by higher demand in the United States. This overall increase was partially offset by an unfavorable impact of $0.6 million related to non-wallboard products and $0.2 million related to foreign currency exchange rates.

Cost of Goods Sold. Cost of goods sold increased$6.3 million, up7.2% from $88.0 million for the three months ended September 30, 2017, to $94.3 million for the three months ended September 30, 2018. Higher wallboard volumes increased input costs and freight costs by $1.7 million and $0.9 million, respectively. In addition, labor cost and maintenance cost increased cost of goods sold by $2.3 million. Higher per unit freight and input costs increased cost of goods sold by $1.5 million. Depreciation and amortization costs decreased $0.4 million. Changes in other components of cost of goods sold resulted in a net increase of $0.3 million.

Selling and Administrative Expense. Selling and administrative expense increased$1.1 million, up12.4% from $8.9 million for the three months ended September 30, 2017, to $10.0 million for the three months ended September 30, 2018. The increase was mainly driven by a $0.9 million increase in salary, bonus and stock compensation expenses. The remaining increase was driven by other selling and administrative expense.

Operating Income. Operating income of $27.0 million for the three months ended September 30, 2018increased by $7.3 million from operating income of $19.7 million for the three months ended September 30, 2017. The increase was primarily attributable to higher volumes and an increase in net selling price, which was partially offset by higher freight per unit costs and higher labor and maintenance costs.

Other (Expense)/income, Net.Other (expense)/income, net, increased expense by $0.1 million for three months ended September 30, 2018 due to foreign currency exchange loss.

Interest Expense, Net. Interest expense was $2.5 million for the three months ended September 30, 2018, a decrease of $0.5 million from $3.0 million for the three months ended September 30, 2017. The decrease was primarily driven by a $0.3 million increase in investment income and a $0.2 million increase in capitalized interest as a result of capital spending. The rise in LIBOR rate was offset by the terminated interest rate swap gain amortization and lower average outstanding borrowings during third quarter 2018 compared to prior year quarter and a lower interest rate spread over LIBOR following the debt repricing on December 6, 2017. See Note 9 and Note 10 to the Consolidated Financial Statements for further details on the repricing and interest rate swap, respectively.

Provision for Income Taxes. Provision for income taxes decreased by $0.3 million to $5.4 million for three months ended September 30, 2018, compared to $5.7 million for the same period of 2017. The lower provision for income taxes was primarily driven by a decrease in certain state taxes as a result of new legislation passed in the second quarter and the federal tax rate from the 2017 tax reform. These regulatory changes resulted in an effective tax rate of approximately 22.7% during the three months ended September 30, 2018 as compared to 34.1% during the three months ended September 30, 2017. This decrease in the effective tax rate was partially offset by the higher pretax income.

Nine Months Ended September 30, 2018 Compared to Nine Months Ended September 30, 2017

Net Sales.Net sales increased by $29.5 million, up8.2% from $357.8 million for the nine months ended September 30, 2017, to $387.3 million for the nine months ended September 30, 2018. The increase was primarily attributable to a favorable impact of $17.4 million due to an increase in the average net selling price for gypsum wallboard at constant exchange rates and a $12.5 million favorable impact of higher wallboard volumes driven by higher demand in the United States. In addition, there was a $0.4 million favorable impact of changes in foreign currency exchange rates. This overall increase was partially offset by a decrease in net sales of non-wallboard products of $0.8 million.

Cost of Goods Sold. Cost of goods sold increased$11.8 million, up4.4% from $267.4 million for the nine months ended September 30, 2017, to $279.2 million for the nine months ended September 30, 2018. Higher wallboard volumes increased input costs and freight costs by $4.1 million and $2.2 million, respectively. In addition, labor cost and maintenance costs increased cost of goods sold by $4.6 million. Higher per unit freight and input costs increased cost of goods sold by $2.4 million. Depreciation and amortization decreased cost of goods sold by $2.2 million. Changes in other components of cost of goods sold resulted in a net increase of $0.7 million.

21

Selling and Administrative Expense. Selling and administrative expense increased$2.4 million, up8.8% from $27.4 million for the nine months ended September 30, 2017, to $29.8 million for the nine months ended September 30, 2018. The increase was driven by a $1.9 million increase in salary, bonus and stock compensation expenses. The remaining increase was driven by other selling and administrative expense.

Operating Income. Operating income of $78.3 million for the nine months ended September 30, 2018increased by $15.3 million from operating income of $63.0 million for the nine months ended September 30, 2017. The increase was primarily attributable to higher volumes and an increase in net selling price, which was partially offset by higher freight per unit costs and higher labor and maintenance costs.

Other Expense, Net.Other expense, net, was $0.3 million for the nine months ended September 30, 2018 compared to other expense, net, of $0.6 million for the nine months ended September 30, 2017. The change mainly reflects the impact of non-recurring costs of $0.7 million related to the debt repricing in the first quarter 2017, which was partially offset by the impact of changes in foreign exchange transactions. See Note 9 to the Consolidated Financial Statements for further details on the repricing.

Interest Expense, Net. Interest expense was $8.0 million for the nine months ended September 30, 2018, a decrease of $1.0 million from $9.0 million for the nine months ended September 30, 2017. The decrease was primarily driven by a $0.7 million increase in investment income and a $0.5 million increase in capitalized interest as a result of capital spending. The rise in LIBOR rate was offset by lower average outstanding borrowings during the nine months of 2018 compared to prior year period, a lower interest rate spread over LIBOR following the debt repricing on December 6, 2017, and by the terminated interest rate swap gain amortization. See Note 9 and Note 10 to the Consolidated Financial Statements for further details on the repricing and interest rate swap, respectively.

Provision for Income Taxes. Provision for income taxes decreased $3.0 million to $14.8 million for the nine months ended September 30, 2018, compared to $17.8 million for the same period of 2017. The lower provision for income taxes was primarily driven by a decrease in certain state taxes as a result of new legislation passed in the second quarter and the federal tax rate from the 2017 tax reform. These regulatory changes resulted in an effective tax rate of approximately 21.5% during the nine months ended September 30, 2018 as compared to 33.3% during the nine months ended September 30, 2017. This decrease in the effective tax rate was partially offset by the higher pretax income.

Liquidity and Capital Resources

Our primary sources of liquidity are cash on hand, cash from operations, and borrowings under our debt financing arrangements. As of September 30, 2018, we had $105.5 million in cash and cash equivalents. We believe that our current cash position, access to the long-term debt capital markets and cash flow generated from operations should be sufficient not only for our operating requirements but also to enable us to complete our capital expenditure programs, fund share repurchases and any required long-term debt payments through the next several fiscal years. In addition, we have funds available from our revolving credit facilities and the ability to obtain alternative sources of financing. See Note 9 to the Consolidated Financial Statements for a more detailed discussion of our debt financing arrangements.

Table M2: Net Change in Cash and Cash Equivalents
	For the Nine Months Ended
	September 30, 2018			September 30, 2017
	(in thousands)
Net cash provided by operating activities	$	84,054		$	75,092
Net cash used in investing activities	(21,075		)	(15,548		)
Net cash used in financing activities	(29,864		)	(51,839		)
Effect of foreign exchange rates on cash and cash equivalents	(184		)	707
Net change in cash and cash equivalents	$	32,931		$	8,412

Net Cash Provided By Operating Activities

Net cash provided by operating activities for the nine months ended September 30, 2018 and 2017 was $84.1 million and $75.1 million, respectively. The increase of $9.0 million in 2018 compared to 2017 was primarily driven by an increase in operating income, primarily from higher revenues, partially offset by a decrease in cash from changes in working capital related to a larger build up of finished goods and paper inventory during 2018 compared to 2017.

22

Net Cash Used In Investing Activities

Net cash used in investing activities for the nine months ended September 30, 2018 was $21.1 million, compared to $15.5 million for the nine months ended September 30, 2017. The increase in investing activities for the nine months ended September 30, 2018 primarily reflects an aggregate of $21.1 million in capital expenditures and software purchased or developed, compared to $14.3 million for 2017.

Net Cash Used In Financing Activities

Net cash used in financing activities for the nine months ended September 30, 2018 was $29.9 million, compared to $51.8 million for nine months ended September 30, 2017. The decrease in financing activities for the nine months ended September 30, 2018 primarily reflects an aggregate of $27.4 million deployed to repurchase common stock, compared to $49.1 million for 2017. See Note 11 to the Consolidated Financial Statements for more detailed discussion of share repurchase activity. During the nine months ended September 30, 2017, we refinanced our amended and restated credit agreement, resulting in a net outflow of $0.6 million. See Note 9 to the Consolidated Financial Statements for a more detailed discussion of the repricing. We made principal payments on our outstanding debt of $2.0 million for both the nine months ended September 30, 2018 and 2017.

Critical Accounting Policies and Estimates

The preparation of our financial statements requires us to make estimates, judgments and assumptions that affect the reported

amounts of assets, liabilities, revenues and expenses during the periods presented. The 2017 Form 10-K includes a summary of the critical accounting policies we believe are the most important to aid in understanding our financial results. There have been no changes to those critical accounting policies that have had a material impact on our reported amounts of assets, liabilities, revenues or expenses during the nine months ended September 30, 2018.

23

Forward-Looking Statements

This Quarterly Report on Form 10-Q contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). These forward-looking statements are included throughout this Quarterly Report on Form 10-Q, and relate to matters such as our industry, business strategy, goals and expectations concerning our market position, future operations, margins, profitability, capital expenditures, liquidity, capital resources and other financial and operating information. We have used the words "anticipate," "assume," "believe," "contemplate," "continue," "could," "estimate," "expect," "future," "intend," "may," "plan," "potential," "predict," "project," "seek," "should," "target," "will" and similar terms and phrases to identify forward-looking statements in this Quarterly Report on Form 10-Q. All of our forward-looking statements are subject to risks and uncertainties that may cause actual results to differ materially from those that we are expecting, including:

• cyclicality in our markets, especially the new residential construction market;

• the highly competitive nature of our industry and the substitutability of competitors' products;

• disruptions in our supply of synthetic gypsum due to regulatory changes or coal-fired power plants ceasing or reducing operations or switching to natural gas;

• significant buying power of certain customers;

• potential losses of customers;

• changes to environmental and safety laws and regulations requiring modifications to our manufacturing systems;

• material disruptions at our facilities or the facilities of our suppliers;

• disruptions to our supply of paperboard liner, including termination of the WestRock contract;

• changes in energy, transportation and other input costs;

• changes in, cost of compliance with or the failure or inability to comply with governmental laws and regulations, in particular environmental regulations;

• disruption in transportation network;

• our involvement in legal and regulatory proceedings;

• our ability to attract and retain key management employees;

• disruptions in our information technology systems;

• cybersecurity risks;

• labor disruptions;

• seasonal nature of our business; and

• additional factors discussed under the sections captioned Risk Factors, Management's Discussion and Analysis of Financial Condition and Results of Operations and Business in our SEC filings.

The forward-looking statements contained in this Quarterly Report on Form 10-Q are based on historical performance and management's current plans, estimates and expectations in light of information currently available to us and are subject to uncertainty and changes in circumstances. There can be no assurance that future developments affecting us will be those that we have anticipated. Actual results may differ materially from these expectations due to changes in global, regional or local political, economic, business, competitive, market, regulatory and other factors, many of which are beyond our control. We believe that these factors include those described in Item 1A. Risk Factors in the 2017 Form 10-K. Should one or more of these risks or uncertainties materialize, or should any of our assumptions prove to be incorrect, our actual results may vary in material respects from what we may have expressed or implied by these forward-looking statements. We caution that you should not place undue reliance on any of our forward-looking statements. Any forward-looking statement made by us in this Quarterly Report on Form 10-Q speaks only as of the date on which we make it. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by applicable securities laws.

24

Item 3. Quantitative and Qualitative Disclosures About Market Risk

The Company's market rate risk disclosures set forth in Part II, Item 7A, "Quantitative and Qualitative Disclosures About Market Risk" on the 2017 Form 10-K have not changed materially during the nine month period ended September 30, 2018.

Item 4. Controls and Procedures

Management's Evaluation of Disclosure Controls and Procedures. The Company's management carried out the evaluation of the effectiveness of the Company's disclosure controls and procedures (as defined under Rule 13a-15(e) of the Exchange Act), required by paragraph (b) of Exchange Act Rules 13a-15, under the supervision and with the participation of the Company's Chief Executive Officer and Chief Financial Officer. Based upon this evaluation, the Company's Chief Executive Officer and Chief Financial Officer concluded that the Company's disclosure controls and procedures were effective as of September 30, 2018.

Changes in Internal Control Over Financial Reporting. There were no changes in the Company's internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act) during the three months ended September 30, 2018 that have materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.

Limitations in Control Systems. The design of any system of control is based upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated objectives under all future events, no matter how remote, or that the degree of compliance with the policies or procedures may not deteriorate. Because of their inherent limitations, disclosure controls and procedures may not prevent or detect all misstatements. Accordingly, even effective disclosure controls and procedures can only provide reasonable assurance of achieving their control objectives.

25

PART II - OTHER INFORMATION

Item 1. Legal Proceedings

From time to time we have been, and may in the future become involved in, litigation or other legal proceedings relating to claims arising in the normal course of business. In the opinion of management, there are no pending or threatened legal proceedings which would reasonably be expected to have a material adverse effect on our business or results of operations. We may become involved in material legal proceedings in the future.

See Note 16 to the Consolidated Financial Statements for a description of certain legal proceedings.

Item 1A. Risk Factors

There were no material changes during the three months ended September 30, 2018 to the risk factors previously disclosed in the 2017 Form 10-K.

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

(a) None.

(b) None.

(c) On November 4, 2015, our Board of Directors approved a new stock repurchase program authorizing us to repurchase up to $50 million of our common stock, at such times and prices as determined by management as market conditions warrant, through December 31, 2016. On August 3, 2016, our Board of Directors increased the aggregate authorization from up to $50 million to up to $100 million and extended the expiration date to December 31, 2017. On February 21, 2017, the Board of Directors further expanded the Company's share repurchase program by an additional $100 million up to a total of $200 million of its common stock and extended the expiration date to December 31, 2018. On February 21, 2018, the Board of Directors further expanded the Company's share repurchase program by an additional $100 million up to a total of $300 million of its common stock and extended the expiration date to December 31, 2019.

Common Stock Repurchase Activity During the Three Months Ended September 30, 2018
Period	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of the Publicly Announced Plans or Programs	Maximum Dollar Value That May Yet Be Purchased Under the Plans or Programs
July 1 - July 31, 2018	—	$	—	—	$	172,116,117
August 1 - August 31, 2018	13,300	37.34		13,300	171,619,467
September 1 - September 30, 2018	63,300	37.38		63,300	169,253,003
Total	76,600	$	37.38	76,600

Item 3. Defaults Upon Senior Securities

(a) None.

(b) None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

26

Item 6. Exhibits

Exhibit No.	Description of Exhibit
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 and Chief Financial Officer 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 Calculation Linkbase Document.	*
101.DEF	XBRL Taxonomy Definition Linkbase Document.	*
101.LAB	XBRL Taxonomy Label Linkbase Document.	*
101.PRE	XBRL Taxonomy Presentation Linkbase Document.	*

* Filed herewith.

27

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, thereunto duly authorized.

CONTINENTAL BUILDING PRODUCTS, INC.
	/s/ James Bachmann	November 9, 2018
By:	James Bachmann
	President and Chief Executive Officer
	(Principal Executive Officer)
	/s/ Dennis Schemm	November 9, 2018
By:	Dennis Schemm
	Senior Vice President and Chief Financial Officer
	(Principal Financial Officer)

28

EX-31.1

Exhibit 31.1

CERTIFICATION

I, James Bachmann, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Continental Building Products, Inc.;

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(s) 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 controls 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;

5. The registrant’s other certifying officer(s) 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.

/s/ James Bachmann	November 9, 2018
James Bachmann	Date
President and Chief Executive Officer
(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Dennis Schemm, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Continental Building Products, Inc.;

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(s) 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 controls 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;

5. The registrant’s other certifying officer(s) 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.

/s/ Dennis Schemm	November 9, 2018
Dennis Schemm	Date
Senior Vice President and Chief Financial Officer
(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION 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 Continental Building Products, Inc. (the “Company”) on Form 10-Q for the fiscal quarterly period ended September 30, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, James Bachmann, President and Chief Executive Officer of the Company, and Dennis Schemm, Senior Vice President and Chief Financial Officer of the Company, each certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that to his knowledge:

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

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

/s/ James Bachmann	November 9, 2018
James Bachmann	Date
President and Chief Executive Officer
(Principal Executive Officer)
/s/ Dennis Schemm	November 9, 2018
Dennis Schemm	Date
Senior Vice President and Chief Financial Officer
(Principal Financial Officer)

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 05, 2018
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Trading Symbol	CBPX
Entity Registrant Name	CONTINENTAL BUILDING PRODUCTS, INC.
Entity Central Index Key	0001592480
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		36,841,935

XML

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 131,234	$ 116,526	$ 387,304	$ 357,771
Costs, expenses and other income:
Cost of goods sold	94,306	87,952	279,185	267,393
Selling and administrative	9,957	8,867	29,826	27,364
Total costs and operating expenses	104,263	96,819	309,011	294,757
Operating income	26,971	19,707	78,293	63,014
Other (expense)/income, net	(29)	146	(256)	(633)
Interest expense, net	(2,549)	(2,988)	(7,963)	(8,966)
Income before losses from equity method investment and provision for income taxes	24,393	16,865	70,074	53,415
Losses from equity method investment	(393)	(204)	(1,148)	(29)
Income before provision for income taxes	24,000	16,661	68,926	53,386
Provision for income taxes	(5,436)	(5,674)	(14,821)	(17,774)
Net income	$ 18,564	$ 10,987	$ 54,105	$ 35,612
Net income per share:
Basic (usd per share)	$ 0.51	$ 0.29	$ 1.46	$ 0.91
Diluted (usd per share)	$ 0.50	$ 0.29	$ 1.46	$ 0.91
Weighted average shares outstanding:
Basic (shares)	36,732,746	38,212,869	37,012,536	38,966,575
Diluted (shares)	36,918,904	38,345,556	37,181,387	39,080,973

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 18,564	$ 10,987	$ 54,105	$ 35,612
Foreign currency translation adjustment	298	695	(496)	1,259
Net (losses)/gains on derivatives, net of taxes	(8)	127	1,489	(451)
Other comprehensive income	290	822	993	808
Comprehensive income	$ 18,854	$ 11,809	$ 55,098	$ 36,420

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets:
Cash and cash equivalents	$ 105,452	$ 72,521
Trade receivables, net	39,597	38,769
Inventories, net	32,439	24,882
Prepaid and other current assets	11,605	11,267
Total current assets	189,093	147,439
Property, plant and equipment, net	290,670	294,003
Customer relationships and other intangibles, net	64,661	70,807
Goodwill	119,945	119,945
Equity method investment	8,194	9,263
Debt issuance costs	341	477
Total Assets	672,904	641,934
Liabilities:
Accounts payable	32,253	30,809
Accrued and other liabilities	13,239	11,940
Notes payable, current portion	1,670	1,702
Total current liabilities	47,162	44,451
Deferred taxes and other long-term liabilities	15,392	15,847
Notes payable, non-current portion	262,400	263,610
Total Liabilities	324,954	323,908
Shareholders' Equity:
Undesignated preferred stock, par value $0.001 per share; 10,000,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $0.001 par value per share; 190,000,000 shares authorized; 44,422,804 and 44,321,776 shares issued and 36,681,879 and 37,532,959 shares outstanding as of September 30, 2018 and December 31, 2017, respectively	44	44
Additional paid-in capital	327,643	325,391
Less: Treasury stock	(170,782)	(143,357)
Accumulated other comprehensive loss	(1,656)	(2,649)
Accumulated earnings	192,701	138,597
Total Shareholders' Equity	347,950	318,026
Total Liabilities and Shareholders' Equity	$ 672,904	$ 641,934

XML

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Undesignated preferred stock, par value (usd per share)	$ 0.001	$ 0.001
Undesignated preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Undesignated preferred stock, shares issued (in shares)	0	0
Undesignated preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	190,000,000	190,000,000
Common stock, shares issued (in shares)	44,422,804	44,321,776
Common stock, shares outstanding (in shares)	36,681,879	37,532,959

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 54,105	$ 35,612
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	32,966	35,817
Amortization of debt issuance costs and debt discount	931	885
Losses from equity method investment	1,148	29
Amortization of deferred gain on terminated swaps	(632)	0
Loss on debt extinguishment	0	686
Share-based compensation	2,459	2,101
Deferred taxes	(457)	92
Change in assets and liabilities:
Trade receivables	(914)	1,420
Inventories	(7,627)	(872)
Prepaid expenses and other current assets	1,264	(350)
Accounts payable	(52)	(87)
Accrued and other current liabilities	1,089	4
Other long-term liabilities	(226)	(245)
Net cash provided by operating activities	84,054	75,092
Cash flows from investing activities:
Capital expenditures	(19,761)	(14,077)
Software purchased or developed	(1,359)	(183)
Proceeds from the sale of property, plant and equipment	125	0
Capital contributions to equity method investment	(548)	(1,929)
Distributions from equity method investment	468	641
Net cash used in investing activities	(21,075)	(15,548)
Cash flows from financing activities:
Proceeds from exercise of stock options	145	230
Tax withholdings on share-based compensation	(547)	(240)
Proceeds from debt refinancing	0	273,625
Disbursements for debt refinancing	0	(273,625)
Payments of financing costs	0	(649)
Principal payments for debt	(2,037)	(2,052)
Payments to repurchase common stock	(27,425)	(49,128)
Net cash used in financing activities	(29,864)	(51,839)
Effect of foreign exchange rates on cash and cash equivalents	(184)	707
Net change in cash and cash equivalents	32,931	8,412
Cash, beginning of period	72,521	51,536
Cash, end of period	$ 105,452	$ 59,948

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Background and Nature of Operations

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Background and Nature of Operations

BACKGROUND AND NATURE OF OPERATIONS

Description of Business

Continental Building Products, Inc. (the "Company") is a Delaware corporation. Prior to the acquisition of the gypsum division of Lafarge North America Inc. ("Lafarge N.A.") described below, the Company had no operating activity. The Company manufactures gypsum wallboard related products for commercial and residential buildings and houses. The Company operates a network of three highly efficient wallboard facilities, all located in the eastern United States, and produces joint compound at one plant in the United States and at another plant in Canada.

The Acquisition

On June 24, 2013, the Company's former controlling stockholder entered into a definitive agreement with Lafarge N.A. to purchase the assets of its North American gypsum division for an aggregate purchase price of approximately $703 million (the "Acquisition") in cash. The closing of the Acquisition occurred on August 30, 2013.

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Significant Accounting Policies

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Significant Accounting Policies

SIGNIFICANT ACCOUNTING POLICIES

(a) Basis of Presentation

The accompanying consolidated financial statements for the Company have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP"). The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions have been eliminated.

(b) Basis of Presentation for Interim Periods

Certain information and footnote disclosures normally included for the annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted for the interim periods presented. Management believes that the unaudited interim financial statements include all adjustments (which are normal and recurring in nature) necessary to present fairly the financial position of the Company and the results of operations and cash flows for the periods presented.

The results of operations for the periods presented are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. Seasonal changes and other conditions can affect the sales volumes of the Company's products. Therefore, the financial results for any interim period do not necessarily indicate the expected results for the year.

The financial statements should be read in conjunction with Company's audited consolidated financial statements and the notes thereto for the year ended December 31, 2017 included in the Company's Annual Report on Form 10-K for the fiscal year then ended. The Company has continued to follow the accounting policies set forth in those financial statements.

(c) Revenue Disclosure

Revenue from the sale of gypsum products is recognized when control of the promised products is transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those products (the transaction price). A performance obligation is a promise in a contract to transfer a distinct product to a customer and is the unit of account under Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 606. Control transfers to the customer at a point in time. To indicate the transfer of control, the Company must have a present right to payment, legal title must have passed to the customer and the customer must have the significant risks and rewards of ownership. Generally, the Company satisfies its performance obligations within a number of days from the time the contract is executed.

The Company records estimated reductions to revenue for customer programs and incentive offerings, including promotions and other volume-based incentives, in the period in which the sale occurs.

Amounts billed to a customer at the transaction price are included in net sales, and costs incurred for shipping and handling are treated as fulfillment costs and are classified as cost of goods sold in the Consolidated Statements of Operations. See Note 17, Segment reporting, for disaggregation of revenue by segment.

As of September 30, 2018, accounts receivables were $39.6 million. The Company had no material contract assets, contract liabilities or deferred contract costs recorded on the Consolidated Balance Sheets as of September 30, 2018. The Company does not have any material payment terms as payment is received shortly after the point of sale.

(d) Supplemental Cash Flow Disclosure

Table 2.1: Certain Cash Transactions and Other Activity
	For the Nine Months Ended
	September 30, 2018		September 30, 2017
	(in thousands)
Cash paid during the period for:
Interest paid on term loan, net	$	8,049	$	7,582
Income taxes paid, net	15,903		16,338
Other activity:
Amounts in accounts payable for capital expenditures	1,538		1,123

(e) Recent Accounting Pronouncements

Accounting Standards Recently Adopted

In May 2014, the FASB issued ASU No. 2014-9, "Revenue from Contracts with Customers (Topic 606)," which provides accounting guidance for all revenue arising from contracts with customers and affects all entities that enter into contracts to provide goods or services to their customers. In August 2015, the FASB issued ASU No. 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date," which deferred the effective date of ASU No. 2014-9 for all entities by one year to annual reporting periods beginning after December 15, 2017. The ASU requires retroactive application on either a full or modified basis. The Company adopted the standard on January 1, 2018 using the modified retrospective approach. Based on its evaluation, the Company has concluded it has one revenue stream and the adoption of this new guidance did not have a material impact on its Consolidated Financial Statements.

In August 2016, the FASB issued ASU 2016-15, "Classification of Certain Cash Receipts and Cash Payments." This ASU reduces existing diversity in the classification of certain cash receipts and cash payments on the statements of cash flows. ASU 2016-15 is effective for fiscal years beginning after December 15, 2017, and for interim periods within those fiscal years. The adoption of this standard did not have a material impact on the Company's Consolidated Financial Statements.

In October 2016, the FASB issued ASU 2016-16, "Intra-Entity Transfers of Assets Other Than Inventory." The new standard requires companies to recognize the income tax effects of intercompany sales or transfers of assets, other than inventory, in the income statement as income tax expense (or benefit) in the period the sales or transfer occurs. The standard requires companies to apply a modified retrospective approach with a cumulative catch-up adjustment to opening retained earnings in the period of adoption. The provisions of this standard are effective for fiscal years beginning after December 15, 2017, and early adoption is permitted. The adoption of this standard did not have a material impact on the Company's Consolidated Financial Statements.

Accounting Standards Not Yet Adopted

In February 2016, the FASB issued ASU 2016-02, "Leases." ASU 2016-02 requires lessees to recognize a lease liability and a right-of-use asset on the balance sheet. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company will adopt the standard on January 1, 2019.

The Company will take advantage of the transition package of practical expedients permitted within the new standard, which among other things, allows companies to carryforward the historical lease classification. In addition, the Company is electing the comparative period practical expedient, which allows the Company to implement the guidance as of the effective date without having to adjust the comparative financial statements. Instead, under this expedient, companies will recognize the cumulative effect adjustment in equity. The Company will also make an accounting policy election that leases with an initial term of 12 months or less will not be recorded on the balance sheet and will result in the recognition of those lease payments in the Consolidated Statements of Operations on a straight-line basis over the lease term. While the Company is continuing to evaluate the impact of adoption, it is not expected to have a material impact on its Consolidated Financial Statements.

In June 2016, the FASB issued ASU 2016-13, "Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments." This ASU is intended to introduce a revised approach to the recognition and measurement of credit losses, emphasizing an updated model based on expected losses rather than incurred losses. The provisions of this standard are effective for reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities." This ASU expands an entity's ability to hedge non-financial and financial risk components and reduce complexity in fair value hedges of interest rate risk. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The provisions of this standard are effective in 2019 for calendar-year public business entities and in 2020 for all other calendar-year companies. Early adoption of the standard is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In February 2018, the FASB issued ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220), Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." This ASU allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The provisions of this standard are effective for reporting periods beginning after December 15, 2018 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurements (Topic 820), Changes to the Disclosure Requirements for Fair Value Measurement." This ASU eliminates certain disclosure requirements for fair value measurements for all entities, requires public entities to disclose certain new information and modifies some disclosure requirements. The provisions of this standard are effective for reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-15, "Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." This ASU requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in Accounting Standards Codification 350-40 to determine which implementation costs to defer and recognize as an asset. The provisions of this standard are effective for reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

(f) Reclassifications

Certain reclassifications of prior year information were made to conform to the 2018 presentation. These reclassifications had no material impact on the Company's Consolidated Financial Statements.

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Trade Receivables, Net

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Trade Receivables, Net

TRADE RECEIVABLES, NET

Table 3: Details of Trade Receivables, Net
	September 30, 2018			December 31, 2017
	(in thousands)
Trade receivables, gross	$	40,447		$	39,577
Allowance for cash discounts and doubtful accounts	(850		)	(808		)
Trade receivables, net	$	39,597		$	38,769

Trade receivables are recorded net of credit memos issued during the normal course of business.

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Inventories, Net

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Inventories, Net

INVENTORIES, NET

Table 4: Details of Inventories, Net
	September 30, 2018		December 31, 2017
	(in thousands)
Finished products	$	8,195	$	5,893
Raw materials	16,821		11,663
Supplies and other	7,423		7,326
Inventories, net	$	32,439	$	24,882

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Property, Plant and Equipment, Net

9 Months Ended

Sep. 30, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

PROPERTY, PLANT AND EQUIPMENT, NET

Table 5: Details of Property, Plant and Equipment, Net
	September 30, 2018			December 31, 2017
	(in thousands)
Land	$	13,187		$	13,187
Buildings	115,422			114,051
Plant machinery	284,151			281,786
Mobile equipment	12,828			10,366
Construction in progress	32,186			20,291
Property, plant and equipment, at cost	457,774			439,681
Accumulated depreciation	(167,104		)	(145,678		)
Property, plant and equipment, net	$	290,670		$	294,003

Depreciation expense was $9.1 million and $25.4 million for the three and nine months ended September 30, 2018, respectively, compared to $9.0 million and $26.5 million for the three and nine months ended September 30, 2017, respectively.

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Customer Relationships and Other Intangibles, Net

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Customer Relationships and Other Intangibles, Net

CUSTOMER RELATIONSHIPS AND OTHER INTANGIBLES, NET

Table 6.1: Details of Customer Relationships and Other Intangibles, Net
	September 30, 2018							December 31, 2017
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	(in thousands)
Customer relationships	$	116,529	$	(64,041	)	$	52,488	$	116,711	$	(57,811	)	$	58,900
Purchased and internally developed software	7,718		(5,340		)	2,378		6,226		(4,871		)	1,355
Trademarks	14,816		(5,021		)	9,795		14,839		(4,287		)	10,552
Total	$	139,063	$	(74,402	)	$	64,661	$	137,776	$	(66,969	)	$	70,807

Amortization expense was $2.5 million and $7.5 million for the three and nine months ended September 30, 2018, respectively, compared to $3.0 million and $9.3 million for the three and nine months ended September 30, 2017, respectively.

Table 6.2: Details of Future Amortization Expense of Customer Relationships and Other Intangibles
	As of September 30, 2018
	(in thousands)
October 1, 2018 through December 31, 2018	$	2,766
2019	8,907
2020	8,150
2021	7,410
2022	6,746
Thereafter	30,682
Total	$	64,661

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Investment in Seven Hills

9 Months Ended

Sep. 30, 2018

Equity Method Investments and Joint Ventures [Abstract]

Investment in Seven Hills

INVESTMENT IN SEVEN HILLS

The Company is a party with an unaffiliated third party to a paperboard liner venture named Seven Hills Paperboard, LLC ("Seven Hills") that, pursuant to a paper supply agreement, provides the Company with a continuous supply of high-quality recycled paperboard liner to meet its ongoing production requirements.

The Company has evaluated the characteristics of its investment and determined that Seven Hills is a variable interest entity, but that it does not have the power to direct the principal activities most impacting the economic performance of Seven Hills, and is thus not the primary beneficiary. As such, the Company accounts for this investment in Seven Hills under the equity method of accounting.

Paperboard liner purchased from Seven Hills was $12.3 million and $37.4 million for the three and nine months ended September 30, 2018, respectively, compared to $15.5 million and $42.3 million for the three and nine months ended September 30, 2017, respectively. As of September 30, 2018, the Company had certain purchase commitments for paper totaling $29.2 million through 2021.

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Accrued and Other Liabilities

9 Months Ended

Sep. 30, 2018

Payables and Accruals [Abstract]

Accrued and Other Liabilities

ACCRUED AND OTHER LIABILITIES

Table 8: Details of Accrued and Other Liabilities
	September 30, 2018		December 31, 2017
	(in thousands)
Employee-related costs	$	8,471	$	9,258
Property taxes	2,321		472
Other taxes	562		466
Other	1,885		1,744
Accrued and other liabilities	$	13,239	$	11,940

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Debt

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Debt

DEBT 

Table 9.1: Details of Debt
	September 30, 2018			December 31, 2017
	(in thousands)
Amended and Restated Credit Agreement (1)	$	269,536		$	271,573
Less: Original issue discount (net of amortization)	(1,442		)	(1,681		)
Less: Debt issuance costs	(4,024		)	(4,580		)
Total debt	264,070			265,312
Less: Current portion of long-term debt	(1,670		)	(1,702		)
Long-term debt	$	262,400		$	263,610

(1) As of September 30, 2018 and December 31, 2017, the Amended and Restated Credit Agreement, as amended, had a maturity date of August 18, 2023 and an interest rate of LIBOR (with a 0.75% floor) plus 2.25%.

On August 18, 2016, the Company, Continental Building Products Operating Company, LLC and Continental Building Products Canada Inc. and the lenders party thereto and Credit Suisse, as Administrative Agent, entered into an Amended and Restated Credit Agreement amending and restating the Company's First Lien Credit Agreement (the "Amended and Restated Credit Agreement"). The Amended and Restated Credit Agreement provides for a $275 million senior secured first lien term loan facility and a $75 million senior secured revolving credit facility (the "Revolver"), which mature on August 18, 2023 and August 18, 2021, respectively. The interest rate under the Amended and Restated Credit Agreement was a spread over LIBOR of 2.75% and floor of 0.75%.

On February 21, 2017, the Company repriced its term loan under the Amended and Restated Credit Agreement lowering its interest rate by 25 basis points to LIBOR plus 2.50%. Subsequently, on December 6, 2017, the Company further repriced its term loan under the Amended and Restated Credit Agreement lowering its interest rate by an additional 25 basis points to LIBOR plus 2.25%. The Company may further reduce its interest rate to LIBOR plus 2.00% based on the attainment of a total leverage ratio of 1.1 or better. All other terms and conditions under the Amended and Restated Credit Agreement remained the same.

During both the nine months ended September 30, 2018 and 2017, the Company made $2.0 million of scheduled mandatory principal payments. As of September 30, 2018, the annual effective interest rate, including original issue discount and amortization of debt issuance costs, was 5.0%.

There were no amounts outstanding under the Revolver as of September 30, 2018 or 2017. During the nine months ended September 30, 2018 and 2017, the Company did not have any draws under the Revolver. Interest under the Revolver is floating, based on LIBOR plus 2.25%. In addition, the Company pays a facility fee of 50 basis points per annum on the total capacity under the Revolver. Availability under the Revolver as of September 30, 2018, based on draws and outstanding letters of credit and absence of violations of covenants, was $73.6 million.

Table 9.2: Details of Future Minimum Principal Payments Due Under the Amended and Restated Credit Agreement
	Amount Due
	(in thousands)
October 1, 2018 through December 31, 2018	$	679
2019	2,716
2020	2,716
2021	2,716
2022	2,716
Thereafter	257,993
Total Payments	$	269,536

Under the terms of the Amended and Restated Credit Agreement, the Company is required to comply with certain covenants, including among others, the limitation of indebtedness, limitation on liens, and limitations on certain cash distributions. One single financial covenant governs all of the Company's debt and only applies if the outstanding borrowings of the Revolver plus outstanding letters of credit are greater than $22.5 million as of the end of the quarter. The financial covenant is a total leverage ratio calculation, in which total debt less outstanding cash is divided by adjusted earnings before interest, taxes, depreciation and amortization. As the sum of outstanding borrowings under the Revolver and outstanding letters of credit were less than $22.5 million at September 30, 2018, the total leverage ratio of no greater than 5.0 under the financial covenant was not applicable at September 30, 2018. The Company was in compliance with all applicable covenants under the Amended and Restated Credit Agreement as of September 30, 2018.

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Derivative Instruments

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

DERIVATIVE INSTRUMENTS

Commodity Derivative Instruments

As of September 30, 2018, the Company had 2.1 million mmBTUs (millions of British Thermal Units) in aggregate notional amount outstanding natural gas swap contracts to manage commodity price exposures. All of these contracts mature by July 31, 2019. The Company elected to designate these derivative instruments as cash flow hedges in accordance with ASC 815-20, "Derivatives – Hedging". No ineffectiveness was recorded on these contracts during the three and nine months ended September 30, 2018 and 2017.

Interest Rate Derivative Instrument

In September 2016, the Company entered into interest rate swap agreements for a combined notional amount of $100.0 million with a term of four years, which hedged the floating LIBOR on a portion of the term loan under the Amended and Restated Credit Agreement to an average fixed rate of 1.323% and LIBOR floor of 0.75%. The Company elected to designate these interest rate swaps as cash flow hedges for accounting purposes.

On March 29, 2018, the Company terminated its interest rate swap agreements that were previously designated as a cash flow hedge and received $3.2 million in cash, the fair value of the swap on the termination date. The unrealized gain at termination remains in accumulated other comprehensive income and will be amortized into interest expense over the life of the original hedged instrument. On the same date, the Company entered into new interest rate swap agreements for a combined notional amount of $100.0 million, which expire on September 30, 2020 and hedge the floating LIBOR on a portion of the term loan under the Amended and Restated Credit Agreement to an average fixed rate of 2.46% and LIBOR floor of 0.75%. The Company elected to designate these interest rate swaps as cash flow hedges for accounting purposes. No ineffectiveness was recorded on these contracts during the three and nine months ended September 30, 2018 and 2017.

Table 10.1: Details of Derivatives Fair Value
	September 30, 2018		December 31, 2017
	(in thousands)
Assets
Interest rate swap	$	697	$	2,148
Commodity hedges	77		11
Total assets	$	774	$	2,159
Liabilities
Interest rate swap	$	—	$	—
Commodity hedges	5		613
Total liabilities	$	5	$	613

Table 10.2: Gains/(Losses) on Derivatives
	For the Three Months Ended September 30,											For the Nine Months Ended September 30,
	2018		2017			2018			2017			2018		2017			2018			2017
	Gain/(loss) recognized in Other comprehensive income on derivatives (effective portion), net of tax					Gain/(loss) reclassified from Accumulated other comprehensive loss into income (effective portion), net of tax						Gain/(loss) recognized in Other comprehensive income on derivatives (effective portion), net of tax					Gain/(loss) reclassified from Accumulated other comprehensive loss into income (effective portion), net of tax
	(in thousands)
Interest rate swap	$	145	$	37		$	169		$	(7	)	$	1,413	$	(318	)	$	379		$	(133	)
Commodity hedges	7		(44		)	(9		)	(127		)	251		(304		)	(204		)	(38		)
Total	$	152	$	(7	)	$	160		$	(134	)	$	1,664	$	(622	)	$	175		$	(171	)

Counterparty Risk

The Company is exposed to credit losses in the event of nonperformance by the counterparties to the Company's derivative instruments. As of September 30, 2018, the Company's derivatives were in a $0.8 million net asset position and recorded in Other current assets. All of the Company's counterparties have investment grade credit ratings; accordingly, the Company anticipates that the counterparties will be able to fully satisfy their obligations under the contracts. The Company's agreements outline the conditions upon which it or the counterparties are required to post collateral. As of September 30, 2018, the Company had no collateral posted with its counterparties related to the derivatives.

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Treasury Stock

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Treasury Stock

TREASURY STOCK

On November 4, 2015, the Company announced that the Board of Directors approved a new stock repurchase program authorizing the Company to repurchase up to $50 million of its common stock, at such times and prices as determined by management as market conditions warrant, through December 31, 2016. Pursuant to this authorization, the Company has repurchased shares of its common stock in the open market and in private transactions.

During 2017 and 2018, the Company announced two expansions and extensions of its stock repurchase program. The most recent authorization on February 21, 2018 expanded the program to a total of $300 million and also extended the expiration date to December 31, 2019.

All repurchased shares are held in treasury, reducing the number of shares of common stock outstanding and used in the Company's earnings per share calculation.

Table 11: Details of Treasury Stock Activity
	September 30, 2018					September 30, 2017
	Shares	Amount (1)		Average Share Price (1)		Shares	Amount (1)		Average Share Price (1)
	(in thousands, except share data)
For the Three Months Ended:
Beginning Balance	7,664,325	$	167,919	$	21.91	5,648,778	$	116,592	$	20.64
Repurchases on open market	76,600	2,863		37.38		941,039	21,292		22.63
Ending Balance	7,740,925	$	170,782	$	22.06	6,589,817	$	137,884	$	20.92
For the Nine Months Ended:
Beginning Balance	6,788,817	$	143,357	$	21.12	4,499,655	$	88,756	$	19.73
Repurchases on open market	952,108	27,425		28.80		2,090,162	49,128		23.50
Ending Balance	7,740,925	$	170,782	$	22.06	6,589,817	$	137,884	$	20.92
(1) Includes commissions paid for repurchases on open market.

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Share-Based Compensation

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

SHARE-BASED COMPENSATION

For the three and nine months ended September 30, 2018, the Company recognized share-based compensation expenses of $0.8 million and $2.5 million in expense, respectively, compared to $0.6 million and $2.1 million for the three and nine months ended September 30, 2017, respectively. The expenses related to share-based compensation awards were recorded in selling and administrative expenses. As of September 30, 2018, there was $5.5 million of total unrecognized compensation cost related to non-vested stock options, restricted stock awards, restricted stock units and performance-based restricted stock units. This cost is expected to be recognized over a weighted average period of 2.3 years.

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Accumulated Other Comprehensive Loss

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Accumulated Other Comprehensive Loss

ACCUMULATED OTHER COMPREHENSIVE LOSS

Table 13: Details of Changes in Accumulated Other Comprehensive Loss by Category
	Foreign currency translation adjustment			Net unrealized gain on derivatives, net of tax			Total
	(in thousands)
Balance as of December 31, 2017	$	(3,636	)	$	987		$	(2,649	)
Other comprehensive (loss)/income before reclassifications	(496		)	1,664			1,168
Amounts reclassified from accumulated other comprehensive loss	—			(175		)	(175		)
Net current period other comprehensive (loss)/income	(496		)	1,489			993
Balance as of September 30, 2018	$	(4,132	)	$	2,476		$	(1,656	)

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Income Taxes

9 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Income Taxes

INCOME TAXES

The Company’s estimated annual effective tax rate is 22.3% before discrete items. For the nine months ended September 30, 2018, discrete items resulted in a tax benefit of $0.6 million, consisting of a stock compensation windfall of $0.1 million and a non-recurring benefit of $0.5 million related to re-measurement of deferred taxes resulting from state tax law change. Due to the timing of the enactment and the complexity involved in applying the provisions of the Tax Cuts and Jobs Act of 2017 (the "Act"), the Company calculated its best estimate of the impact of the Act in its 2017 year end income tax provision in accordance with its understanding of the Act and guidance available as of the date of its Annual Report on Form 10-K for fiscal year 2017 and as a result had recorded a provisional $9.2 million reduction in income tax expense in the fourth quarter of 2017. No adjustment was made to the provisional amount as a result of additional information obtained for the nine months ended  September 30, 2018.

The Company is subject to audit examinations at federal, state and local levels by tax authorities in those jurisdictions. In addition, the Canadian operations are subject to audit examinations at federal and provincial levels by tax authorities in those jurisdictions. The tax matters challenged by the tax authorities are typically complex; therefore, the ultimate outcome of any challenges would be subject to uncertainty. The Company has not identified any issues that did not meet the recognition threshold or would be impacted by the measurement provisions of the uncertain tax position guidance.

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Earnings Per Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

The following table shows the weighted average number of shares used in computing earnings per share and the effect on the weighted average number of shares of potentially dilutive securities. Potentially dilutive common stock has no effect on income available to common stockholders. There were no anti-dilutive awards during the three months ended September 30, 2018 and 2017. For the nine months ended September 30, 2018 and 2017, awards that had an anti-dilutive impact on the Company's dilutive earnings per share computation excluded from the weighted average shares outstanding were 21,000 and 29,000, respectively.

Table 15: Details of Basic and Dilutive Earnings Per Share
	For the Three Months Ended				For the Nine Months Ended
	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
	(dollars in thousands, except for per share amounts)
Net income	$	18,564	$	10,987	$	54,105	$	35,612
Weighted average number of shares outstanding - basic	36,732,746		38,212,869		37,012,536		38,966,575
Effect of dilutive securities:
Restricted stock awards	—		6,852		1,170		7,598
Restricted stock units	89,750		48,175		72,650		54,171
Performance restricted stock units	68,384		58,199		67,231		30,853
Stock options	28,024		19,461		27,800		21,776
Total effect of dilutive securities	186,158		132,687		168,851		114,398
Weighted average number of shares outstanding - diluted	36,918,904		38,345,556		37,181,387		39,080,973
Basic earnings per share	$	0.51	$	0.29	$	1.46	$	0.91
Diluted earnings per share	$	0.50	$	0.29	$	1.46	$	0.91

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

Commitments

The Company leases certain buildings and equipment. The Company's facility and equipment leases may provide for escalations of rent or rent abatements and payment of pro rata portions of building operating expenses. Minimum lease payments are recognized on a straight-line basis over the minimum lease term. The total expenses under operating leases for the three and nine months ended September 30, 2018 were $0.6 million and $2.2 million, respectively, compared to $0.8 million and $2.5 million for the same periods in 2017, respectively. The Company also has non-capital purchase commitments that primarily relate to gas, gypsum, paper and other raw materials. The total amounts purchased under such commitments were $22.7 million and $69.5 million for the three and nine months ended September 30, 2018, respectively, compared to $22.0 million and $64.8 million for the three and nine months ended September 30, 2017, respectively.

Table 16: Details of Future Minimum Lease Payments Due Under Noncancellable Operating Leases and Purchase Commitments
	Future Minimum Lease Payments		Purchase Commitments
	(in thousands)
October 1, 2018 - December 31, 2018	$	180	$	17,958
2019	1,658		47,287
2020	48		46,141
2021	—		28,097
2022	—		25,069
2023	—		12,284
Thereafter	—		53,621
Total	$	1,886	$	230,457

Contingent obligations

Under certain circumstances, the Company provides letters of credit related to its natural gas and other supply purchases. As of September 30, 2018 and December 31, 2017, the Company had outstanding letters of credit of approximately $1.4 million.

Legal Matters

In the ordinary course of business, the Company executes contracts involving indemnifications standard in the industry. These indemnifications might include claims relating to any of the following: environmental and tax matters; intellectual property rights; governmental regulations and employment-related matters; customer, supplier, and other commercial contractual relationships; and financial matters. While the maximum amount to which the Company may be exposed under such agreements cannot be estimated, it is the opinion of management that these guarantees and indemnifications are not expected to have a material adverse effect on the Company's financial condition, results of operations or liquidity.

In the ordinary course of business, the Company is involved in certain legal actions and claims, including proceedings under laws and regulations relating to environmental and other matters. Because such matters are subject to many uncertainties and the outcomes are not predictable with assurance, the total liability for these legal actions and claims cannot be determined with certainty. When the Company determines that it is probable that a liability for environmental matters, legal actions or other contingencies has been incurred and the amount of the loss is reasonably estimable, an estimate of the costs to be incurred is recorded as a liability in the financial statements. As of September 30, 2018 and December 31, 2017, such liabilities were not expected to have a material adverse effect on the Company's financial condition, results of operations or liquidity. While management believes its accruals for such liabilities are adequate, the Company may incur costs in excess of the amounts provided. Although the ultimate amount of liability that may result from these matters or actions is not ascertainable, any amounts exceeding the recorded accruals are not expected to have a material adverse effect on the Company's financial condition, results of operations or liquidity.

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Segment Reporting

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Segment Reporting

SEGMENT REPORTING

Segment information is presented in accordance with ASC 280, Segment Reporting, which establishes standards for reporting information about operating segments. It also establishes standards for related disclosures about products and geographic areas. The Company's primary reportable segment is wallboard, which represented approximately 97.6% and 97.3% of the Company's revenues for the three and nine months ended September 30, 2018, respectively, compared to 96.8% of the Company's revenues for both the three and nine months ended September 30, 2017, respectively. This segment produces wallboard for the commercial and residential construction sectors. The Company also manufactures finishing products, which complement the Company's full range of wallboard products.

Revenues from the major products sold to external customers include gypsum wallboard and finishing products.

The Company's two geographic areas consist of the United States and Canada for which it reports net sales, fixed assets and total assets.

The Company evaluates operating performance based on profit or loss from operations before certain adjustments as shown below. Revenues are attributed to geographic areas based on the location of the customer generating the revenue. The Company did not provide asset information by segment as its Chief Operating Decision Maker does not use such information for purposes of allocating resources and assessing segment performance.

Table 17.1: Segment Reporting
	For the Three Months Ended						For the Nine Months Ended
	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
	(in thousands)
Net Sales:
Wallboard	$	128,101		$	112,796		$	376,739		$	346,466
Other	3,133			3,730			10,565			11,305
Total net sales	$	131,234		$	116,526		$	387,304		$	357,771
Operating Income:
Wallboard	$	27,551		$	19,992		$	79,702		$	63,402
Other	(580		)	(285		)	(1,409		)	(388		)
Total operating income	$	26,971		$	19,707		$	78,293		$	63,014
Adjustments:
Interest expense	$	(2,549	)	$	(2,988	)	$	(7,963	)	$	(8,966	)
Losses from equity investment	(393		)	(204		)	(1,148		)	(29		)
Other (expense)/income, net	(29		)	146			(256		)	(633		)
Income before provision for income taxes	$	24,000		$	16,661		$	68,926		$	53,386
Depreciation and Amortization:
Wallboard	$	11,299		$	11,793		$	32,016		$	34,992
Other	281			264			950			825
Total depreciation and amortization	$	11,580		$	12,057		$	32,966		$	35,817

Table 17.2: Details of Net Sales By Geographic Region
	For the Three Months Ended				For the Nine Months Ended
	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
	(in thousands)
United States	$	125,430	$	110,430	$	367,917	$	334,481
Canada	5,804		6,096		19,387		23,290
Net sales	$	131,234	$	116,526	$	387,304	$	357,771

Table 17.3: Details of Assets By Geographic Region
	Fixed Assets				Total Assets
	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
	(in thousands)
United States	$	287,255	$	290,324	$	654,965	$	622,836
Canada	3,415		3,679		17,939		19,098
Total	$	290,670	$	294,003	$	672,904	$	641,934

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Fair Value Disclosures

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Disclosures

FAIR VALUE DISCLOSURES

The Company estimates the fair value of its debt by discounting the future cash flows of each instrument using estimated market rates of debt instruments with similar maturities and credit profiles. These inputs are classified as Level 3 within the fair value hierarchy. As of September 30, 2018 and December 31, 2017, the carrying value reported in the consolidated balance sheet for the Company's notes payable approximated its fair value. The only assets or liabilities the Company had at September 30, 2018 that are recorded at fair value on a recurring basis are the natural gas hedges and interest rate swaps. Generally, the Company obtains its Level 2 pricing inputs from its counterparties. Substantially all of these assumptions are observable in the marketplace throughout the full term of the instrument, can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace.

Assets and liabilities that are measured at fair value on a non-recurring basis include intangible assets and goodwill. These items are recognized at fair value when they are considered to be impaired.

There were no fair value adjustments for assets and liabilities measured on a non-recurring basis. The Company discloses fair value information about financial instruments for which it is practicable to estimate that value.

Table 18.1: Fair Value Hierarchy - 2018
	As of September 30, 2018
	Level 1		Level 2		Level 3		Balance
	(in thousands)
Asset
Interest rate swap	$	—	$	697	$	—	$	697
Commodity derivatives	—		77		—		77
Total assets	$	—	$	774	$	—	$	774
Liabilities
Interest rate swap	$	—	$	—	$	—	$	—
Commodity derivatives	—		5		—		5
Total liabilities	$	—	$	5	$	—	$	5

Table 18.2: Fair Value Hierarchy - 2017
	As of December 31, 2017
	Level 1		Level 2		Level 3		Balance
	(in thousands)
Asset
Interest rate swap	$	—	$	2,148	$	—	$	2,148
Commodity derivatives	—		11		—		11
Total assets	$	—	$	2,159	$	—	$	2,159
Liabilities
Interest rate swap	$	—	$	—	$	—	$	—
Commodity derivatives	—		613		—		613
Total liabilities	$	—	$	613	$	—	$	613

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Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying consolidated financial statements for the Company have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP"). The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions have been eliminated.

Revenue Recognition

Revenue Disclosure

Revenue from the sale of gypsum products is recognized when control of the promised products is transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those products (the transaction price). A performance obligation is a promise in a contract to transfer a distinct product to a customer and is the unit of account under Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 606. Control transfers to the customer at a point in time. To indicate the transfer of control, the Company must have a present right to payment, legal title must have passed to the customer and the customer must have the significant risks and rewards of ownership. Generally, the Company satisfies its performance obligations within a number of days from the time the contract is executed.

The Company records estimated reductions to revenue for customer programs and incentive offerings, including promotions and other volume-based incentives, in the period in which the sale occurs.

Amounts billed to a customer at the transaction price are included in net sales, and costs incurred for shipping and handling are treated as fulfillment costs and are classified as cost of goods sold in the Consolidated Statements of Operations. See Note 17, Segment reporting, for disaggregation of revenue by segment.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Accounting Standards Recently Adopted

In May 2014, the FASB issued ASU No. 2014-9, "Revenue from Contracts with Customers (Topic 606)," which provides accounting guidance for all revenue arising from contracts with customers and affects all entities that enter into contracts to provide goods or services to their customers. In August 2015, the FASB issued ASU No. 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date," which deferred the effective date of ASU No. 2014-9 for all entities by one year to annual reporting periods beginning after December 15, 2017. The ASU requires retroactive application on either a full or modified basis. The Company adopted the standard on January 1, 2018 using the modified retrospective approach. Based on its evaluation, the Company has concluded it has one revenue stream and the adoption of this new guidance did not have a material impact on its Consolidated Financial Statements.

In August 2016, the FASB issued ASU 2016-15, "Classification of Certain Cash Receipts and Cash Payments." This ASU reduces existing diversity in the classification of certain cash receipts and cash payments on the statements of cash flows. ASU 2016-15 is effective for fiscal years beginning after December 15, 2017, and for interim periods within those fiscal years. The adoption of this standard did not have a material impact on the Company's Consolidated Financial Statements.

In October 2016, the FASB issued ASU 2016-16, "Intra-Entity Transfers of Assets Other Than Inventory." The new standard requires companies to recognize the income tax effects of intercompany sales or transfers of assets, other than inventory, in the income statement as income tax expense (or benefit) in the period the sales or transfer occurs. The standard requires companies to apply a modified retrospective approach with a cumulative catch-up adjustment to opening retained earnings in the period of adoption. The provisions of this standard are effective for fiscal years beginning after December 15, 2017, and early adoption is permitted. The adoption of this standard did not have a material impact on the Company's Consolidated Financial Statements.

Accounting Standards Not Yet Adopted

In February 2016, the FASB issued ASU 2016-02, "Leases." ASU 2016-02 requires lessees to recognize a lease liability and a right-of-use asset on the balance sheet. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company will adopt the standard on January 1, 2019.

The Company will take advantage of the transition package of practical expedients permitted within the new standard, which among other things, allows companies to carryforward the historical lease classification. In addition, the Company is electing the comparative period practical expedient, which allows the Company to implement the guidance as of the effective date without having to adjust the comparative financial statements. Instead, under this expedient, companies will recognize the cumulative effect adjustment in equity. The Company will also make an accounting policy election that leases with an initial term of 12 months or less will not be recorded on the balance sheet and will result in the recognition of those lease payments in the Consolidated Statements of Operations on a straight-line basis over the lease term. While the Company is continuing to evaluate the impact of adoption, it is not expected to have a material impact on its Consolidated Financial Statements.

In June 2016, the FASB issued ASU 2016-13, "Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments." This ASU is intended to introduce a revised approach to the recognition and measurement of credit losses, emphasizing an updated model based on expected losses rather than incurred losses. The provisions of this standard are effective for reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities." This ASU expands an entity's ability to hedge non-financial and financial risk components and reduce complexity in fair value hedges of interest rate risk. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The provisions of this standard are effective in 2019 for calendar-year public business entities and in 2020 for all other calendar-year companies. Early adoption of the standard is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In February 2018, the FASB issued ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220), Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." This ASU allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The provisions of this standard are effective for reporting periods beginning after December 15, 2018 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurements (Topic 820), Changes to the Disclosure Requirements for Fair Value Measurement." This ASU eliminates certain disclosure requirements for fair value measurements for all entities, requires public entities to disclose certain new information and modifies some disclosure requirements. The provisions of this standard are effective for reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-15, "Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." This ASU requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in Accounting Standards Codification 350-40 to determine which implementation costs to defer and recognize as an asset. The provisions of this standard are effective for reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently evaluating the impact that this guidance may have on its Consolidated Financial Statements.

Reclassifications

Reclassifications

Certain reclassifications of prior year information were made to conform to the 2018 presentation. These reclassifications had no material impact on the Company's Consolidated Financial Statements.

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Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Schedule of Cash Flow, Supplemental Disclosures

Supplemental Cash Flow Disclosure

Table 2.1: Certain Cash Transactions and Other Activity
	For the Nine Months Ended
	September 30, 2018		September 30, 2017
	(in thousands)
Cash paid during the period for:
Interest paid on term loan, net	$	8,049	$	7,582
Income taxes paid, net	15,903		16,338
Other activity:
Amounts in accounts payable for capital expenditures	1,538		1,123

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Trade Receivables, Net (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Detail of Receivables, Net

Table 3: Details of Trade Receivables, Net
	September 30, 2018			December 31, 2017
	(in thousands)
Trade receivables, gross	$	40,447		$	39,577
Allowance for cash discounts and doubtful accounts	(850		)	(808		)
Trade receivables, net	$	39,597		$	38,769

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Inventories, Net (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Composition of Inventories

Table 4: Details of Inventories, Net
	September 30, 2018		December 31, 2017
	(in thousands)
Finished products	$	8,195	$	5,893
Raw materials	16,821		11,663
Supplies and other	7,423		7,326
Inventories, net	$	32,439	$	24,882

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Property, Plant and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Details

Table 5: Details of Property, Plant and Equipment, Net
	September 30, 2018			December 31, 2017
	(in thousands)
Land	$	13,187		$	13,187
Buildings	115,422			114,051
Plant machinery	284,151			281,786
Mobile equipment	12,828			10,366
Construction in progress	32,186			20,291
Property, plant and equipment, at cost	457,774			439,681
Accumulated depreciation	(167,104		)	(145,678		)
Property, plant and equipment, net	$	290,670		$	294,003

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Customer Relationships and Other Intangibles, Net (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Details of Customer Relationships and Other Intangibles, Net

Table 6.1: Details of Customer Relationships and Other Intangibles, Net
	September 30, 2018							December 31, 2017
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	(in thousands)
Customer relationships	$	116,529	$	(64,041	)	$	52,488	$	116,711	$	(57,811	)	$	58,900
Purchased and internally developed software	7,718		(5,340		)	2,378		6,226		(4,871		)	1,355
Trademarks	14,816		(5,021		)	9,795		14,839		(4,287		)	10,552
Total	$	139,063	$	(74,402	)	$	64,661	$	137,776	$	(66,969	)	$	70,807

Future Amortization Expense of Customer Relationships and Other Intangibles

Table 6.2: Details of Future Amortization Expense of Customer Relationships and Other Intangibles
	As of September 30, 2018
	(in thousands)
October 1, 2018 through December 31, 2018	$	2,766
2019	8,907
2020	8,150
2021	7,410
2022	6,746
Thereafter	30,682
Total	$	64,661

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Accrued and Other Liabilities (Tables)

9 Months Ended

Sep. 30, 2018

Payables and Accruals [Abstract]

Details of Accrued and Other Liabilities

Table 8: Details of Accrued and Other Liabilities
	September 30, 2018		December 31, 2017
	(in thousands)
Employee-related costs	$	8,471	$	9,258
Property taxes	2,321		472
Other taxes	562		466
Other	1,885		1,744
Accrued and other liabilities	$	13,239	$	11,940

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Debt (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Details of Debt

Table 9.1: Details of Debt
	September 30, 2018			December 31, 2017
	(in thousands)
Amended and Restated Credit Agreement (1)	$	269,536		$	271,573
Less: Original issue discount (net of amortization)	(1,442		)	(1,681		)
Less: Debt issuance costs	(4,024		)	(4,580		)
Total debt	264,070			265,312
Less: Current portion of long-term debt	(1,670		)	(1,702		)
Long-term debt	$	262,400		$	263,610

Future Minimum Principal Payments Due Under the Credit Agreements

Table 9.2: Details of Future Minimum Principal Payments Due Under the Amended and Restated Credit Agreement
	Amount Due
	(in thousands)
October 1, 2018 through December 31, 2018	$	679
2019	2,716
2020	2,716
2021	2,716
2022	2,716
Thereafter	257,993
Total Payments	$	269,536

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Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

Table 10.1: Details of Derivatives Fair Value
	September 30, 2018		December 31, 2017
	(in thousands)
Assets
Interest rate swap	$	697	$	2,148
Commodity hedges	77		11
Total assets	$	774	$	2,159
Liabilities
Interest rate swap	$	—	$	—
Commodity hedges	5		613
Total liabilities	$	5	$	613

Derivative Instruments, Gain (Loss)

Table 10.2: Gains/(Losses) on Derivatives
	For the Three Months Ended September 30,											For the Nine Months Ended September 30,
	2018		2017			2018			2017			2018		2017			2018			2017
	Gain/(loss) recognized in Other comprehensive income on derivatives (effective portion), net of tax					Gain/(loss) reclassified from Accumulated other comprehensive loss into income (effective portion), net of tax						Gain/(loss) recognized in Other comprehensive income on derivatives (effective portion), net of tax					Gain/(loss) reclassified from Accumulated other comprehensive loss into income (effective portion), net of tax
	(in thousands)
Interest rate swap	$	145	$	37		$	169		$	(7	)	$	1,413	$	(318	)	$	379		$	(133	)
Commodity hedges	7		(44		)	(9		)	(127		)	251		(304		)	(204		)	(38		)
Total	$	152	$	(7	)	$	160		$	(134	)	$	1,664	$	(622	)	$	175		$	(171	)

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Treasury Stock (Tables)

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Treasury Stock Activity

All repurchased shares are held in treasury, reducing the number of shares of common stock outstanding and used in the Company's earnings per share calculation.

Table 11: Details of Treasury Stock Activity
	September 30, 2018					September 30, 2017
	Shares	Amount (1)		Average Share Price (1)		Shares	Amount (1)		Average Share Price (1)
	(in thousands, except share data)
For the Three Months Ended:
Beginning Balance	7,664,325	$	167,919	$	21.91	5,648,778	$	116,592	$	20.64
Repurchases on open market	76,600	2,863		37.38		941,039	21,292		22.63
Ending Balance	7,740,925	$	170,782	$	22.06	6,589,817	$	137,884	$	20.92
For the Nine Months Ended:
Beginning Balance	6,788,817	$	143,357	$	21.12	4,499,655	$	88,756	$	19.73
Repurchases on open market	952,108	27,425		28.80		2,090,162	49,128		23.50
Ending Balance	7,740,925	$	170,782	$	22.06	6,589,817	$	137,884	$	20.92
(1) Includes commissions paid for repurchases on open market.

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Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Changes in Accumulated Other Comprehensive (Loss)/Income by Category

Table 13: Details of Changes in Accumulated Other Comprehensive Loss by Category
	Foreign currency translation adjustment			Net unrealized gain on derivatives, net of tax			Total
	(in thousands)
Balance as of December 31, 2017	$	(3,636	)	$	987		$	(2,649	)
Other comprehensive (loss)/income before reclassifications	(496		)	1,664			1,168
Amounts reclassified from accumulated other comprehensive loss	—			(175		)	(175		)
Net current period other comprehensive (loss)/income	(496		)	1,489			993
Balance as of September 30, 2018	$	(4,132	)	$	2,476		$	(1,656	)

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Basic and Dilutive Earnings Per Share

The following table shows the weighted average number of shares used in computing earnings per share and the effect on the weighted average number of shares of potentially dilutive securities. Potentially dilutive common stock has no effect on income available to common stockholders. There were no anti-dilutive awards during the three months ended September 30, 2018 and 2017. For the nine months ended September 30, 2018 and 2017, awards that had an anti-dilutive impact on the Company's dilutive earnings per share computation excluded from the weighted average shares outstanding were 21,000 and 29,000, respectively.

Table 15: Details of Basic and Dilutive Earnings Per Share
	For the Three Months Ended				For the Nine Months Ended
	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
	(dollars in thousands, except for per share amounts)
Net income	$	18,564	$	10,987	$	54,105	$	35,612
Weighted average number of shares outstanding - basic	36,732,746		38,212,869		37,012,536		38,966,575
Effect of dilutive securities:
Restricted stock awards	—		6,852		1,170		7,598
Restricted stock units	89,750		48,175		72,650		54,171
Performance restricted stock units	68,384		58,199		67,231		30,853
Stock options	28,024		19,461		27,800		21,776
Total effect of dilutive securities	186,158		132,687		168,851		114,398
Weighted average number of shares outstanding - diluted	36,918,904		38,345,556		37,181,387		39,080,973
Basic earnings per share	$	0.51	$	0.29	$	1.46	$	0.91
Diluted earnings per share	$	0.50	$	0.29	$	1.46	$	0.91

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Lease Payments Due Under Non-Cancelable Operating Leases and Purchase Commitments by Year

Table 16: Details of Future Minimum Lease Payments Due Under Noncancellable Operating Leases and Purchase Commitments
	Future Minimum Lease Payments		Purchase Commitments
	(in thousands)
October 1, 2018 - December 31, 2018	$	180	$	17,958
2019	1,658		47,287
2020	48		46,141
2021	—		28,097
2022	—		25,069
2023	—		12,284
Thereafter	—		53,621
Total	$	1,886	$	230,457

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Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Segment Reporting

Table 17.1: Segment Reporting
	For the Three Months Ended						For the Nine Months Ended
	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
	(in thousands)
Net Sales:
Wallboard	$	128,101		$	112,796		$	376,739		$	346,466
Other	3,133			3,730			10,565			11,305
Total net sales	$	131,234		$	116,526		$	387,304		$	357,771
Operating Income:
Wallboard	$	27,551		$	19,992		$	79,702		$	63,402
Other	(580		)	(285		)	(1,409		)	(388		)
Total operating income	$	26,971		$	19,707		$	78,293		$	63,014
Adjustments:
Interest expense	$	(2,549	)	$	(2,988	)	$	(7,963	)	$	(8,966	)
Losses from equity investment	(393		)	(204		)	(1,148		)	(29		)
Other (expense)/income, net	(29		)	146			(256		)	(633		)
Income before provision for income taxes	$	24,000		$	16,661		$	68,926		$	53,386
Depreciation and Amortization:
Wallboard	$	11,299		$	11,793		$	32,016		$	34,992
Other	281			264			950			825
Total depreciation and amortization	$	11,580		$	12,057		$	32,966		$	35,817

Net Sales By Geographic Region

Table 17.2: Details of Net Sales By Geographic Region
	For the Three Months Ended				For the Nine Months Ended
	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
	(in thousands)
United States	$	125,430	$	110,430	$	367,917	$	334,481
Canada	5,804		6,096		19,387		23,290
Net sales	$	131,234	$	116,526	$	387,304	$	357,771

Assets By Geographic Region

Table 17.3: Details of Assets By Geographic Region
	Fixed Assets				Total Assets
	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
	(in thousands)
United States	$	287,255	$	290,324	$	654,965	$	622,836
Canada	3,415		3,679		17,939		19,098
Total	$	290,670	$	294,003	$	672,904	$	641,934

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Fair Value Disclosures (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Table 18.1: Fair Value Hierarchy - 2018
	As of September 30, 2018
	Level 1		Level 2		Level 3		Balance
	(in thousands)
Asset
Interest rate swap	$	—	$	697	$	—	$	697
Commodity derivatives	—		77		—		77
Total assets	$	—	$	774	$	—	$	774
Liabilities
Interest rate swap	$	—	$	—	$	—	$	—
Commodity derivatives	—		5		—		5
Total liabilities	$	—	$	5	$	—	$	5

Table 18.2: Fair Value Hierarchy - 2017
	As of December 31, 2017
	Level 1		Level 2		Level 3		Balance
	(in thousands)
Asset
Interest rate swap	$	—	$	2,148	$	—	$	2,148
Commodity derivatives	—		11		—		11
Total assets	$	—	$	2,159	$	—	$	2,159
Liabilities
Interest rate swap	$	—	$	—	$	—	$	—
Commodity derivatives	—		613		—		613
Total liabilities	$	—	$	613	$	—	$	613

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Background and Nature of Operations - Description of Business and Acquisition (Detail) $ in Millions	Aug. 30, 2013 USD ($)	Sep. 30, 2018 facility
Lone Star Fund VIII (U.S.), L.P. | Lafarge N.A.
Business Acquisition [Line Items]
Total purchase price | $	$ 703
Wallboard
Business Acquisition [Line Items]
Number of operating facilities (facility)		3
Joint Compound
Business Acquisition [Line Items]
Number of operating facilities (facility)		1

XML

Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Accounts receivable	$ 39,597	$ 38,769

XML

Significant Accounting Policies - Certain Cash and Non-Cash Transactions (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Accounting Policies [Abstract]
Interest paid on term loan, net	$ 8,049	$ 7,582
Income taxes paid, net	15,903	16,338
Other activity:	$ 1,538	$ 1,123

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Trade Receivables, Net - Detail of Receivables, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Trade receivables, gross	$ 40,447	$ 39,577
Allowance for cash discounts and doubtful accounts	(850)	(808)
Trade receivables, net	$ 39,597	$ 38,769

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Inventories, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Finished products	$ 8,195	$ 5,893
Raw materials	16,821	11,663
Supplies and other	7,423	7,326
Inventories, net	$ 32,439	$ 24,882

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Property, Plant and Equipment, Net - Property, Plant and Equipment Details (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 457,774	$ 439,681
Accumulated depreciation	(167,104)	(145,678)
Property, plant and equipment, net	290,670	294,003
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	13,187	13,187
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	115,422	114,051
Plant machinery
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	284,151	281,786
Mobile equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	12,828	10,366
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 32,186	$ 20,291

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Property, Plant and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 9.1	$ 9.0	$ 25.4	$ 26.5

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Investment in Seven Hills - Additional Information (Detail) - Seven Hills - Variable Interest Entity, Not Primary Beneficiary - Equity Method Investee - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]
Cost of paperboard	$ 12.3	$ 15.5	$ 37.4	$ 42.3
Purchase commitments			$ 29.2

XML

Customer Relationships and Other Intangibles, Net - Details of Customer Relationships and Other Intangibles, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross	$ 139,063	$ 137,776
Accumulated Amortization	(74,402)	(66,969)
Net	64,661	70,807
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross	116,529	116,711
Accumulated Amortization	(64,041)	(57,811)
Net	52,488	58,900
Purchased and internally developed software
Finite-Lived Intangible Assets [Line Items]
Gross	7,718	6,226
Accumulated Amortization	(5,340)	(4,871)
Net	2,378	1,355
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross	14,816	14,839
Accumulated Amortization	(5,021)	(4,287)
Net	$ 9,795	$ 10,552

XML

Customer Relationships and Other Intangibles, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 2.5	$ 3.0	$ 7.5	$ 9.3

XML

Customer Relationships and Other Intangibles, Net - Future Amortization Expense of Customer Relationships and Other Intangibles (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
October 1, 2018 through December 31, 2018	$ 2,766
2019	8,907
2020	8,150
2021	7,410
2022	6,746
Thereafter	30,682
Net	$ 64,661	$ 70,807

XML

Accrued and Other Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Employee-related costs	$ 8,471	$ 9,258
Property taxes	2,321	472
Other taxes	562	466
Other	1,885	1,744
Accrued and other liabilities	$ 13,239	$ 11,940

XML

Debt - Details of Debt (Detail) - USD ($) $ in Thousands			9 Months Ended
	Dec. 06, 2017	Feb. 21, 2017	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Amended and Restated Credit Agreement			$ 269,536
Less: Original issue discount (net of amortization)			(1,442)	$ (1,681)
Less: Debt issuance costs			(4,024)	(4,580)
Total debt			264,070	265,312
Less: Current portion of long-term debt			(1,670)	(1,702)
Long-term debt			262,400	263,610
Amended and Restated Credit Agreement | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt, variable interest rate (as a percent)	2.25%	2.50%
Term Loan Facility | Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Amended and Restated Credit Agreement			$ 269,536	$ 271,573
Term Loan Facility | Amended and Restated Credit Agreement | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Floor rate			0.75%
Debt, variable interest rate (as a percent)			2.25%

XML

Debt - Additional Information (Detail)				9 Months Ended
	Dec. 06, 2017	Feb. 21, 2017	Aug. 18, 2016 USD ($)	Sep. 30, 2018 USD ($) covenant	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Scheduled mandatory principal payments				$ 2,000,000	$ 2,000,000
First Lien Credit Agreement
Debt Instrument [Line Items]
Number of covenants | covenant				1
Debt covenant trigger, line of credit facility amount less letters of credit threshold				$ 22,500,000.0
First Lien Credit Agreement | Maximum
Debt Instrument [Line Items]
Leverage ratio (no greater than)				5.0
Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Decrease in basis spread, percentage	25.00%	0.25%
Leverage ratio (no greater than)	1.1
Amended and Restated Credit Agreement | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt, variable interest rate (as a percent)	2.25%	2.50%
Debt, variable interest rate if leverage ratio met	2.00%
Term Loan Facility | First Lien Credit Agreement
Debt Instrument [Line Items]
Debt principal amount			$ 275,000,000
Effective interest rate				5.00%
Term Loan Facility | First Lien Credit Agreement | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt, variable interest rate (as a percent)			2.75%
Floor rate			0.75%
Term Loan Facility | Amended and Restated Credit Agreement | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt, variable interest rate (as a percent)				2.25%
Floor rate				0.75%
Line of Credit | First Lien Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility borrowing capacity			$ 75,000,000
Debt, variable interest rate (as a percent)				2.25%
Outstanding amount				$ 0		$ 0
Proceeds from line of credit				$ 0	$ 0
Facility fee, basis points				0.50%
Remaining outstanding				$ 73,600,000

XML

Debt - Future Minimum Principal Payments Due Under the Credit Agreements (Detail) $ in Thousands	Sep. 30, 2018 USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]
October 1, 2018 through December 31, 2018	$ 679
2019	2,716
2018	2,716
2020	2,716
2021	2,716
Thereafter	257,993
Total Payments	$ 269,536

XML

Derivative Instruments - Additional Information (Detail)		1 Months Ended	9 Months Ended
	Mar. 29, 2018 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2018 USD ($) MMBTU
Derivative [Line Items]
Proceeds from derivative hedges	$ 3,200,000
Derivatives, net liability position			$ 800,000
Collateral posted with counterparties related to derivatives			$ 0
Natural Gas Swap | Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Aggregate notional amount outstanding (in mmBTUs) | MMBTU			2,070,000
Interest rate swap | Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Aggregate notional amount outstanding	$ 100,000,000	$ 100,000,000
Derivative instrument term (not beyond)		4 years
Average fixed rate (as a percent)	2.46%	1.323%
Interest rate swap | Cash Flow Hedging | Designated as Hedging Instrument | London Interbank Offered Rate (LIBOR)
Derivative [Line Items]
Floor rate (as a percent)	0.75%	0.75%

XML

Derivative Instruments - Derivatives at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Derivative asset	$ 774	$ 2,159
Derivative liability	5	613
Interest rate swap
Derivative [Line Items]
Derivative asset	697	2,148
Derivative liability	0	0
Commodity derivatives
Derivative [Line Items]
Derivative asset	77	11
Derivative liability	$ 5	$ 613

XML

Derivative Instruments - Gains (losses) on derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Other comprehensive income on derivatives (effective portion), net of tax	$ 152	$ (7)	$ 1,664	$ (622)
Gain/(loss) reclassified from Accumulated other comprehensive loss into income (effective portion), net of tax	160	(134)	175	(171)
Interest rate swap
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Other comprehensive income on derivatives (effective portion), net of tax	145	37	1,413	(318)
Gain/(loss) reclassified from Accumulated other comprehensive loss into income (effective portion), net of tax	169	(7)	379	(133)
Commodity derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Other comprehensive income on derivatives (effective portion), net of tax	7	(44)	251	(304)
Gain/(loss) reclassified from Accumulated other comprehensive loss into income (effective portion), net of tax	$ (9)	$ (127)	$ (204)	$ (38)

XML

Treasury Stock - Additional Information (Detail)	21 Months Ended
	Sep. 30, 2018 expansion	Feb. 21, 2018 USD ($)	Nov. 04, 2015 USD ($)
Equity [Abstract]
Stock repurchase program authorized amount (up to) | $		$ 300,000,000	$ 50,000,000
Number of expansions to stock repurchase program | expansion	2

XML

Treasury Stock - Treasury Stock Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Treasury Stock [Roll Forward]
Beginning balance (shares)	7,664,325		5,648,778		6,788,817	4,499,655	4,499,655
Ending balance (shares)	7,740,925	7,664,325	6,589,817	5,648,778	7,740,925	6,589,817	6,788,817	4,499,655
Beginning balance	$ 167,919		$ 116,592		$ 143,357	$ 88,756	$ 88,756
Ending balance	$ 170,782	$ 167,919	$ 137,884	$ 116,592	$ 170,782	$ 137,884	$ 143,357	$ 88,756
Average share price (usd per share)	$ 22.06	$ 21.91	$ 20.92	$ 20.64	$ 22.06	$ 20.92	$ 21.12	$ 19.73
Repurchases on open market
Treasury Stock [Roll Forward]
Shares repurchased (shares)	76,600		941,039		952,108	2,090,162
Shares repurchased	$ 2,863		$ 21,292		$ 27,425	$ 49,128
Average share price (usd per share)	$ 37.38		$ 22.63		$ 28.80	$ 23.50

XML

Share-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Compensation expense	$ 0.8	$ 0.6	$ 2.5	$ 2.1
Unrecognized compensation expense	$ 5.5		$ 5.5
Unrecognized compensation expense, weighted average remaining period			2 years 3 months 20 days

XML

Accumulated Other Comprehensive Loss (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 318,026
Ending Balance	347,950
Foreign currency translation adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,636)
Other comprehensive (loss)/income before reclassifications	(496)
Amounts reclassified from accumulated other comprehensive loss	0
Net current period other comprehensive (loss)/income	(496)
Ending Balance	(4,132)
Net unrealized gain on derivatives, net of tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	987
Other comprehensive (loss)/income before reclassifications	1,664
Amounts reclassified from accumulated other comprehensive loss	(175)
Net current period other comprehensive (loss)/income	1,489
Ending Balance	2,476
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,649)
Other comprehensive (loss)/income before reclassifications	1,168
Amounts reclassified from accumulated other comprehensive loss	(175)
Net current period other comprehensive (loss)/income	993
Ending Balance	$ (1,656)

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Income Taxes - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Dec. 31, 2017	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Effective rate (as a percent)		22.30%
Discrete tax benefit		$ 0.6
Discrete tax benefit from stock compensation windfall		0.1
Discrete tax benefit related to re-measurement of deferred taxes		$ 0.5
Reduction in income tax expense due to Tax Cuts and Jobs Act of 2017	$ (9.2)

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Earnings Per Share - Additional Information (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based compensation awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (shares)	0	0	21,000	29,000

XML

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 18,564	$ 10,987	$ 54,105	$ 35,612
Weighted average number of shares outstanding- basic (shares)	36,732,746	38,212,869	37,012,536	38,966,575
Effect of dilutive securities:
Total effect of dilutive securities (shares)	186,158	132,687	168,851	114,398
Weighted average number of shares outstanding - diluted (shares)	36,918,904	38,345,556	37,181,387	39,080,973
Basic earnings per share (usd per share)	$ 0.51	$ 0.29	$ 1.46	$ 0.91
Diluted earnings per share (usd per share)	$ 0.50	$ 0.29	$ 1.46	$ 0.91
Restricted stock awards
Effect of dilutive securities:
Effect of dilutive securities (shares)	0	6,852	1,170	7,598
Restricted stock units
Effect of dilutive securities:
Effect of dilutive securities (shares)	89,750	48,175	72,650	54,171
Performance restricted stock units
Effect of dilutive securities:
Effect of dilutive securities (shares)	68,384	58,199	67,231	30,853
Stock options
Effect of dilutive securities:
Effect of dilutive securities (shares)	28,024	19,461	27,800	21,776

XML

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 0.6	$ 0.8	$ 2.2	$ 2.5
Letter of Credit
Long-term Purchase Commitment [Line Items]
Outstanding amount of letters of credit	1.4		1.4		$ 1.4
Gas, Gypsum, Paper, and Other Raw Materials
Long-term Purchase Commitment [Line Items]
Non capital purchased under commitments	$ 22.7	$ 22.0	$ 69.5	$ 64.8

XML

Commitments and Contingencies - Future Minimum Lease Payments Due Under Non-Cancelable Operating Leases and Purchase Commitments by Year (Detail) $ in Thousands	Sep. 30, 2018 USD ($)
Future Minimum Lease Payments
October 1, 2018 - December 31, 2018	$ 180
2019	1,658
2020	48
2021	0
2022	0
2023	0
Thereafter	0
Total	1,886
Purchase Commitments
October 1, 2018 - December 31, 2018	17,958
2019	47,287
2020	46,141
2021	28,097
2022	25,069
2023	12,284
Thereafter	53,621
Total	$ 230,457

XML

Segment Reporting - Additional Information (Detail) - geographic_area	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Number of geographical areas (geographic area)	2		2
Wallboard | Sales Revenue, Net | Product Concentration Risk
Segment Reporting Information [Line Items]
Percentage of revenues	97.60%	96.80%	97.30%	96.80%

XML

Segment Reporting - Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Sales:
Net Sales	$ 131,234	$ 116,526	$ 387,304	$ 357,771
Operating Income:
Operating income	26,971	19,707	78,293	63,014
Adjustments:
Interest expense	(2,549)	(2,988)	(7,963)	(8,966)
Losses from equity investment	(393)	(204)	(1,148)	(29)
Other (expense)/income, net	(29)	146	(256)	(633)
Income before provision for income taxes	24,000	16,661	68,926	53,386
Depreciation and Amortization
Total depreciation and amortization	11,580	12,057	32,966	35,817
Operating Segments | Wallboard
Net Sales:
Net Sales	128,101	112,796	376,739	346,466
Operating Income:
Operating income	27,551	19,992	79,702	63,402
Depreciation and Amortization
Total depreciation and amortization	11,299	11,793	32,016	34,992
Operating Segments | Other
Net Sales:
Net Sales	3,133	3,730	10,565	11,305
Operating Income:
Operating income	(580)	(285)	(1,409)	(388)
Depreciation and Amortization
Total depreciation and amortization	281	264	950	825
Adjustments
Adjustments:
Interest expense	(2,549)	(2,988)	(7,963)	(8,966)
Losses from equity investment	(393)	(204)	(1,148)	(29)
Other (expense)/income, net	$ (29)	$ 146	$ (256)	$ (633)

XML

Segment Reporting - Net Sales by Geographic Region (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 131,234	$ 116,526	$ 387,304	$ 357,771
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	125,430	110,430	367,917	334,481
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 5,804	$ 6,096	$ 19,387	$ 23,290

XML

Segment Reporting - Assets by Geographic Region (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Fixed Assets	$ 290,670	$ 294,003
Total Assets	672,904	641,934
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Fixed Assets	287,255	290,324
Total Assets	654,965	622,836
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Fixed Assets	3,415	3,679
Total Assets	$ 17,939	$ 19,098

XML

Fair Value Disclosures (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	$ 774	$ 2,159
Derivative liability	5	613
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	774	2,159
Derivative liability	5	613
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Derivative liability	0	0
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	774	2,159
Derivative liability	5	613
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Derivative liability	0	0
Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	697	2,148
Derivative liability	0	0
Interest rate swap | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	697	2,148
Derivative liability	0	0
Interest rate swap | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Derivative liability	0	0
Interest rate swap | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	697	2,148
Derivative liability	0	0
Interest rate swap | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Derivative liability	0	0
Commodity derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	77	11
Derivative liability	5	613
Commodity derivatives | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	77	11
Derivative liability	5	613
Commodity derivatives | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Derivative liability	0	0
Commodity derivatives | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	77	11
Derivative liability	5	613
Commodity derivatives | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Derivative liability	$ 0	$ 0