10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_____________________________

Form 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2020

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 001-36050

BMC Stock Holdings, Inc.

(Exact name of Registrant as specified in its charter)

Delaware		26-4687975
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)
4800 Falls of Neuse Rd, Suite 400
Raleigh,	North Carolina	27609
(Address of principal executive offices)		(Zip Code)

(919) 431-1000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, par value $0.01 per share	BMCH	The Nasdaq Stock Market LLC

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

Indicate by check mark whether the Registrant has submitted electronically 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 ☒ No ☐

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

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	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 ☒

The number of shares outstanding of the Registrant’s common stock, par value $0.01 per share, at November 2, 2020 was 67,279,993 shares.

BMC STOCK HOLDINGS, INC. AND SUBSIDIARIES

Table of Contents to Form 10-Q

	PART I - FINANCIAL INFORMATION
Item 1	Unaudited Condensed Consolidated Financial Statements
	Condensed Consolidated Balance Sheets as of September 30, 2020 and December 31, 2019	1
	Condensed Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 2020 and 2019	2
	Condensed Consolidated Statements of Stockholders’ Equity for the Three and Nine Months Ended September 30, 2020 and 2019	3
	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2020 and 2019	4
	Notes to Condensed Consolidated Financial Statements	5
Item 2	Management's Discussion and Analysis of Financial Condition and Results of Operations	15
Item 3	Quantitative and Qualitative Disclosures About Market Risk	29
Item 4	Controls and Procedures	29
	PART II - OTHER INFORMATION
Item 1	Legal Proceedings	30
Item 1A	Risk Factors	30
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	34
Item 3	Defaults Upon Senior Securities	34
Item 4	Mine Safety Disclosures	34
Item 5	Other Information	34
Item 6	Exhibits	35
	Signature	36

i

PART I. FINANCIAL INFORMATION

ITEM 1    FINANCIAL STATEMENTS

BMC STOCK HOLDINGS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(in thousands, except share and per share amounts)	September 30, 2020		December 31, 2019
Assets
Current assets
Cash and cash equivalents	$	286,221	$	165,496
Accounts receivable, net of allowances of $9,671 and $8,318 at September 30, 2020 and December 31, 2019, respectively	393,735		325,741
Inventories	413,031		331,969
Contract assets	36,422		32,125
Income taxes receivable	—		7,504
Prepaid expenses and other current assets	76,239		66,818
Total current assets	1,205,648		929,653
Property and equipment, net of accumulated depreciation	366,444		345,466
Operating lease right-of-use assets	131,868		139,907
Customer relationship intangible assets, net of accumulated amortization	170,200		185,049
Other intangible assets, net of accumulated amortization	385		580
Goodwill	295,390		297,146
Other long-term assets	7,599		8,300
Total assets	$	2,177,534	$	1,906,101
Liabilities and Stockholders’ Equity
Current liabilities
Accounts payable	$	300,075	$	189,644
Accrued expenses and other liabilities	116,285		117,825
Contract liabilities	44,980		31,094
Income taxes payable	10,395		—
Interest payable	9,572		4,759
Current portion:
Long-term debt and finance lease obligations	3,210		5,577
Operating lease liabilities	27,635		26,147
Insurance reserves	16,746		16,328
Total current liabilities	528,898		391,374
Insurance reserves	43,287		43,536
Long-term debt	346,659		346,032
Long-term portion of finance lease obligations	4,689		6,959
Long-term portion of operating lease liabilities	113,572		120,832
Deferred income taxes	22,613		15,195
Other long-term liabilities	15,309		661
Total liabilities	1,075,027		924,589
Commitments and contingencies (Note 9)
Stockholders’ equity
Preferred stock, $0.01 par value, 50.0 million shares authorized, no shares issued and outstanding at September 30, 2020 and December 31, 2019	—		—
Common stock, $0.01 par value, 300.0 million shares authorized, 69.0 million and 68.3 million shares issued, and 67.2 million and 66.8 million outstanding at September 30, 2020 and December 31, 2019, respectively	690		683
Additional paid-in capital	702,045		687,255
Retained earnings	430,736		320,190
Treasury stock, at cost, 1.8 million and 1.5 million shares at September 30, 2020 and December 31, 2019, respectively	(30,964)		(26,616)
Total stockholders’ equity	1,102,507		981,512
Total liabilities and stockholders’ equity	$	2,177,534	$	1,906,101

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

1

BMC STOCK HOLDINGS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share amounts)	2020		2019		2020		2019
Net sales	$	1,090,343	$	964,249	$	2,991,118	$	2,736,029
Cost of sales	817,261		709,482		2,228,086		2,019,363
Gross profit	273,082		254,767		763,032		716,666
Selling, general and administrative expenses	195,143		190,579		557,010		546,116
Depreciation expense	11,767		10,501		34,990		30,117
Amortization expense	5,016		4,552		15,045		13,237
Impairment of assets	—		115		2,255		644
	211,926		205,747		609,300		590,114
Income from operations	61,156		49,020		153,732		126,552
Other income (expense)
Interest expense	(5,744)		(5,773)		(17,880)		(17,385)
Other income, net	3,289		3,540		9,128		10,159
Income before income taxes	58,701		46,787		144,980		119,326
Income tax expense	13,806		13,190		34,434		29,680
Net income	$	44,895	$	33,597	$	110,546	$	89,646
Weighted average common shares outstanding
Basic	67,141		66,685		67,001		66,681
Diluted	67,967		67,361		67,725		67,240
Net income per common share
Basic	$	0.67	$	0.50	$	1.65	$	1.34
Diluted	$	0.66	$	0.50	$	1.63	$	1.33

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

2

BMC STOCK HOLDINGS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED)

	Common Stock			Treasury Stock			Additional Paid-in Capital		Retained Earnings		Total
(in thousands)	Shares	Amount		Shares	Amount
Stockholders’ equity as of December 31, 2018	67,708	$	677	478	$	(8,458)	$	672,095	$	210,345	$	874,659
Exercise of stock options	8	—		—	—		132		—		132
Shares vested for long-term incentive plan	290	3		—	—		(3)		—		—
Repurchases of common stock under share repurchase program	—	—		920	(15,709)		—		—		(15,709)
Repurchases of common stock related to equity award activity	—	—		74	(1,330)		—		—		(1,330)
Stock compensation expense	—	—		—	—		2,915		—		2,915
Net income	—	—		—	—		—		20,350		20,350
Stockholders’ equity as of March 31, 2019	68,006	680		1,472	(25,497)		675,139		230,695		881,017
Exercise of stock options	76	1		—	—		528		—		529
Shares vested for long-term incentive plan	73	1		—	—		(1)		—		—
Repurchases of common stock under share repurchase program	—	—		41	(737)		—		—		(737)
Repurchases of common stock related to equity award activity	—	—		6	(137)		—		—		(137)
Stock compensation expense	—	—		—	—		3,248		—		3,248
Net income	—	—		—	—		—		35,699		35,699
Stockholders’ equity as of June 30, 2019	68,155	682		1,519	(26,371)		678,914		266,394		919,619
Exercise of stock options	84	1		—	—		1,532		—		1,533
Shares vested for long-term incentive plan	27	—		—	—		—		—		—
Repurchases of common stock related to equity award activity	—	—		7	(182)		—		—		(182)
Stock compensation expense	—	—		—	—		3,014		—		3,014
Net income	—	—		—	—		—		33,597		33,597
Stockholders’ equity as of September 30, 2019	68,266	$	683	1,526	$	(26,553)	$	683,460	$	299,991	$	957,581
Stockholders’ equity as of December 31, 2019	68,306	$	683	1,528	$	(26,616)	$	687,255	$	320,190	$	981,512
Exercise of stock options	13	—		—	—		206		—		206
Shares vested for long-term incentive plan	402	4		—	—		(4)		—		—
Repurchases of common stock under share repurchase program	—	—		87	(1,416)		—		—		(1,416)
Repurchases of common stock related to equity award activity	—	—		122	(2,441)		—		—		(2,441)
Stock compensation expense	—	—		—	—		3,170		—		3,170
Net income	—	—		—	—		—		22,029		22,029
Stockholders’ equity as of March 31, 2020	68,721	687		1,737	(30,473)		690,627		342,219		1,003,060
Exercise of stock options	9	—		—	—		159		—		159
Shares vested for long-term incentive plan	75	1		—	—		(1)		—		—
Repurchases of common stock related to equity award activity	—	—		6	(105)		—		—		(105)
Stock compensation expense	—	—		—	—		3,328		—		3,328
Net income	—	—		—	—		—		43,622		43,622
Stockholders’ equity as of June 30, 2020	68,805	688		1,743	(30,578)		694,113		385,841		1,050,064
Exercise of stock options	196	2		—	—		3,320		—		3,322
Shares vested for long-term incentive plan	27	—		—	—		—		—		—
Repurchases of common stock related to equity award activity	—	—		10	(386)		—		—		(386)
Stock compensation expense	—	—		—	—		4,612		—		4,612
Net income	—	—		—	—		—		44,895		44,895
Stockholders’ equity as of September 30, 2020	69,028	$	690	1,753	$	(30,964)	$	702,045	$	430,736	$	1,102,507

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

3

BMC STOCK HOLDINGS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

	Nine Months Ended September 30,
(in thousands)	2020		2019
Cash flows from operating activities
Net income	$	110,546	$	89,646
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	45,702		39,722
Amortization of intangible assets	15,045		13,237
Amortization of debt issuance costs	952		1,124
Deferred income taxes	7,418		4,857
Non-cash stock compensation expense	11,110		9,177
Gain on sale of property, equipment and real estate	(518)		(1,839)
Other non-cash adjustments	2,395		2,314
Change in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of allowances	(68,365)		(24,068)
Inventories	(81,004)		(494)
Accounts payable	121,405		68,456
Other assets and liabilities	42,508		(3,715)
Net cash provided by operating activities	207,194		198,417
Cash flows from investing activities
Purchases of property, equipment and real estate	(71,037)		(67,582)
Proceeds from sale of property, equipment and real estate	1,258		4,444
Purchases of businesses, net of cash acquired	—		(85,780)
Insurance proceeds	—		107
Net cash used in investing activities	(69,779)		(148,811)
Cash flows from financing activities
Proceeds from revolving credit facility	144,000		110,987
Repayments of proceeds from revolving credit facility	(144,000)		(110,987)
Repurchases of common stock under share repurchase program	(1,416)		(16,446)
Payments on finance lease obligations	(4,613)		(5,094)
Other financing activities, net	(10,661)		(5,530)
Net cash used in financing activities	(16,690)		(27,070)
Net increase in cash and cash equivalents	120,725		22,536
Cash and cash equivalents
Beginning of period	165,496		150,723
End of period	$	286,221	$	173,259
Supplemental disclosure of non-cash transactions
Right-of-use assets obtained in exchange for operating lease obligations	$	13,636	$	34,836
Accrued purchases of property and equipment	4,807		4,484
Acquisition-related holdback payments due at future date, net of post-closing adjustment receivable	3,462		4,527
Assets acquired under finance lease obligations	—		5,789

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

4

BMC STOCK HOLDINGS, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

1.    Organization

These unaudited financial statements represent the financial statements of BMC Stock Holdings, Inc. and its subsidiaries. All references to “BMC” or the “Company” mean BMC Stock Holdings, Inc. and its subsidiaries.

The Company distributes lumber and building materials to new construction and repair and remodeling contractors. Additionally, the Company provides solution-based services to its customers, including component design, product specification and installation services.

2.    Basis of Presentation

The unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) that permit reduced disclosure for interim periods. The condensed consolidated balance sheet as of December 31, 2019 was derived from audited financial statements, but does not include all necessary disclosures required by accounting principles generally accepted in the United States of America (“GAAP”). The unaudited condensed consolidated financial statements include all accounts of the Company and, in the opinion of management, include all recurring adjustments and normal accruals necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the dates and periods presented. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 (“2019 Annual Report on Form 10-K”). Results for interim periods are not necessarily indicative of the results to be expected during the remainder of the current year or for any future period. All material intercompany accounts and transactions have been eliminated in consolidation.

Comprehensive income

Comprehensive income is equal to the net income for all periods presented.

Cash and cash equivalents

Cash equivalents are highly liquid investments that are readily convertible to known amounts of cash and have a maturity of three months or less from the time of purchase. As of September 30, 2020, the Company had no cash equivalents and as of December 31, 2019, the Company had cash equivalents of $4.4 million. Cash equivalents are valued at amortized cost, which approximates fair value due to the short-term maturity of these instruments, and were classified as Level 1 or Level 2 measurements in accordance with Accounting Standards Codification (“ASC”) 820, Fair Value Measurements and Disclosures (“ASC 820”).

Book overdrafts occur when purchases on corporate purchasing cards and checks written exceed available bank balances at a specific bank, despite there being cash at the Company’s other financial institutions. For accounting purposes, the Company reclassifies these book overdrafts to accounts payable on the consolidated balance sheets. Book overdrafts included in accounts payable were $19.5 million and $2.5 million at September 30, 2020 and December 31, 2019, respectively.

Reclassifications

Merger and integration costs of $0.9 million and $2.4 million for the three and nine months ended September 30, 2020, respectively, related to the integration of Building Materials Holding Corporation (“BMHC”) and Stock Building Supply Holdings, Inc. (“SBS”) as a result of the 2015 merger transaction, which were historically presented in merger and integration costs on the condensed consolidated statements of operations, have been reclassified and are presented in selling, general and administrative expenses on the condensed consolidated statements of operations.

Use of estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company evaluates these estimates and judgments on an ongoing basis and bases its estimates on historical experience, current conditions and various other assumptions that are believed to be reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies.

5

Certain accounting matters that generally require consideration of forecasted financial information were assessed in light of the impact from the COVID-19 pandemic as of September 30, 2020. The accounting matters assessed included, but were not limited to, the Company’s allowance for doubtful accounts, inventory reserves, supplier rebates, goodwill impairment, impairment of tangible and intangible long-lived assets, share-based compensation and valuation allowances for tax assets. While the assessments resulted in no material impacts to the Company’s condensed consolidated financial statements as of and for the three and nine months ended September 30, 2020, the Company believes the full impact of the COVID-19 pandemic remains uncertain and the Company will continue to assess if ongoing developments related to the pandemic may cause future material impacts to our consolidated financial statements.

Share repurchase program

Utilizing cash from operations, the Company repurchased no shares during the three months ended September 30, 2020, 0.1 million shares at a weighted average price of $16.20 per share for a total cost of $1.4 million during the nine months ended September 30, 2020, no shares during the three months ended September 30, 2019 and 1.0 million shares at a weighted average price of $17.11 per share for a total cost of $16.4 million during the nine months ended September 30, 2019. These repurchases were made under the Company’s $75.0 million share repurchase program authorized by the Company’s board of directors in November 2018. These repurchased shares are available for future issuance and are reflected as treasury stock, at cost, on the condensed consolidated balance sheets. As of September 30, 2020, the Company had approximately $54.2 million of capacity remaining under the current share repurchase authorization. Under the merger agreement with Builders FirstSource, Inc., a Delaware corporation (“Builders FirstSource”), described in Note 3, the Company has generally agreed not to make any share repurchases prior to the effective time of the merger.

Statement of cash flows

Proceeds from revolving credit facility and repayments of proceeds from revolving credit facility as presented on the condensed consolidated statements of cash flows include all cash activities and transactions between the Company and its associated lenders in relation to the revolving credit facility, excluding interest and fees, and for the nine months ended September 30, 2019, is specifically inclusive of operating cash receipts that were automatically applied to the revolving credit facility pursuant to a voluntary cash sweep arrangement. See Note 6 for further details on the Company’s revolving credit facility.

Recently adopted accounting pronouncements

In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, and issued subsequent amendments to the initial guidance to provide additional clarification on specific topics (“ASU 2016-13”). ASU 2016-13 amends the impairment model by requiring entities to use a forward-looking approach based on expected losses to estimate credit losses on certain types of financial instruments, including trade receivables. ASU 2016-13 became effective for the Company’s annual and interim periods beginning on January 1, 2020. Modified retrospective application is required, with certain exceptions. The adoption of the standard did not have a material impact on the Company’s consolidated financial statements.

In January 2017, the FASB issued Accounting Standards Update 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires computation of the implied fair value of a reporting unit’s goodwill. The amount of a goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 became effective for the Company’s annual goodwill impairment test and any interim tests during the Company’s annual and interim periods beginning on January 1, 2020. Prospective application is required. The adoption of the standard did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued Accounting Standards Update 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). ASU 2018-13 modifies the disclosure requirements on fair value measurements by removing, modifying and adding certain disclosure requirements in ASC 820. ASU 2018-13 became effective for the Company’s annual and interim periods beginning on January 1, 2020. Certain disclosures in ASU 2018-13 are required to be applied prospectively, while others require retrospective application. The adoption of the standard did not have a material impact on the Company’s consolidated financial statements.

6

Recently issued accounting pronouncements not yet adopted

In December 2019, the FASB issued Accounting Standards Update 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”). ASU 2019-12 removes certain exceptions to the general principles in ASC 740 and clarifies and amends certain guidance to promote consistent application. ASU 2019-12 is effective for the Company's annual and interim periods beginning on January 1, 2021, with early adoption permitted. Depending on the amendment, adoption may be applied on a retrospective, modified retrospective or prospective basis. The adoption of the standard is not expected to have a material impact on the Company’s consolidated financial statements.

In March 2020, the FASB issued Accounting Standards Update 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by the expected transition away from reference rates that are expected to be discontinued, such as LIBOR. ASU 2020-04 was effective upon issuance. The Company may elect to apply the guidance prospectively through December 31, 2022. The Company is evaluating the impact of the standard on its consolidated financial statements.

3.    Merger Agreement with Builders FirstSource, Inc.

On August 26, 2020, the Company, Builders FirstSource and Boston Merger Sub I Inc., a Delaware corporation and a direct wholly owned subsidiary of Builders FirstSource (“Merger Sub”), entered into an Agreement and Plan of Merger (the “Merger Agreement”), pursuant to which the Company and Builders FirstSource will combine in an all-stock merger transaction. Upon the terms and subject to the conditions set forth in the Merger Agreement, at the effective time of the Merger (the “Effective Time”), Merger Sub will merge with and into the Company, with the Company continuing as the surviving corporation and becoming a wholly owned subsidiary of Builders FirstSource (the “Merger”), with Builders FirstSource identified as the accounting acquirer.

Under the terms of the Merger Agreement, which has been unanimously approved by the board of directors of each company, at the Effective Time, each issued and outstanding share of the Company’s common stock, par value $0.01 per share (the “BMC Common Stock”), will automatically be converted into the right to receive 1.3125 shares (the “Exchange Ratio”) of common stock, par value $0.01 per share, of Builders FirstSource (the “BLDR Common Stock”). No fractional shares of BLDR Common Stock will be issued in the Merger, and holders of shares of BMC Common Stock will receive cash in lieu of any such fractional shares. Upon consummation of the Merger, Builders FirstSource’s stockholders will own approximately 57% and the Company’s stockholders will own approximately 43% of the combined company.

Each outstanding BMC stock option held by a current employee or service-provider will become, at the Effective Time, an option to purchase shares of BLDR Common Stock, with the number of shares and the exercise price adjusted by the Exchange Ratio. Each outstanding BMC stock option held by any former BMC employee or service-provider will be converted at the Effective Time into the right to receive cash in an amount equal to the product of (i) the number of shares of BMC Common Stock subject to such BMC stock option as of immediately prior to the Effective Time and (ii) the excess of the market value of 1.3125 shares of BLDR Common Stock over the applicable exercise price per share of such option, subject to applicable withholding taxes. Each outstanding BMC time-vested and performance-vested restricted stock unit will vest and settle at the Effective Time in a number of shares of BLDR Common Stock equal to the number of shares of BMC Common Stock otherwise issuable upon settlement of such BMC restricted stock unit (assuming target level of performance for performance-vested awards), multiplied by the Exchange Ratio, and subject to applicable withholding taxes.

The Merger is intended to qualify as a tax-free reorganization under the Internal Revenue Code so that none of the Company, Builders FirstSource, Merger Sub, or any of the Company’s stockholders generally will recognize any gain or loss on the issuance or receipt of BLDR Common Stock in the Merger, except that the Company’s stockholders generally may recognize gain or loss with respect to cash received in lieu of fractional shares of BLDR Common Stock.

The Company and Builders FirstSource have made customary representations, warranties and covenants in the Merger Agreement, including covenants regarding the conduct of their respective businesses during the pre-closing period and their use of reasonable best efforts to consummate the Merger. In addition, the Merger Agreement contains restrictions on the Company’s and Builders FirstSource’s ability to (i) solicit competing acquisition proposals and (ii) subject to certain exceptions if their respective boards of directors determine it would be inconsistent with their fiduciary duties, to participate in any discussions or negotiations, or provide any non-public information, or take other actions in furtherance of or relating to any competing acquisition proposals, or change, withdraw, qualify, or modify the recommendation by the Company’s or Builders FirstSource’s board of directors to their respective stockholders to adopt the Merger Agreement and approve the issuance of BLDR Common Stock in the Merger (the “Stock Issuance”), respectively.

7

The Merger Agreement contains certain termination rights for both the Company and Builders FirstSource, including (i) if the Merger is not consummated on or before the “outside date” of May 26, 2021 (subject to extension to August 26, 2021, under certain circumstances), (ii) if the required approval of the Company’s stockholders or Builders FirstSource’s stockholders is not obtained, (iii) if any law or order prohibiting the Merger or the Stock Issuance has become final and non-appealable, (iv) if the board of directors of the other party changes its recommendation of the Merger prior to the receipt of its stockholder approval, (v) if the other party breaches its obligation not to solicit competing acquisition proposals in any material respect, or (vi) if the other party breaches its representations or warranties or fails to perform its covenants and such breach would cause a failure of the related closing condition and either is not curable by the outside date or is not cured within thirty days of notice of the breach. Upon termination of the Merger Agreement, under certain specified circumstances, the Company may be required to pay a termination fee of $66 million to Builders FirstSource or Builders FirstSource may be required to pay a termination fee of $100 million to the Company.

The foregoing description of the Merger Agreement is not complete and is qualified in its entirety by reference to the full text of the Merger Agreement included as Exhibit 2.1 to the Company’s Current Report on Form 8-K filed with the SEC on August 27, 2020 and incorporated by reference in this Quarterly Report on Form 10-Q.

The Company incurred Merger-related costs of $8.5 million and $9.2 million for the three and nine months ended September 30, 2020, respectively, which are included in selling, general and administrative expenses on the condensed consolidated statements of operations.

4.    Acquisitions

For all acquisitions, the Company allocates the purchase price to assets acquired and liabilities assumed as of the date of acquisition based on the estimated fair values at the date of acquisition. The excess of the fair value of the purchase consideration over the fair values of the identifiable assets and liabilities is recorded as goodwill. Management makes significant estimates and assumptions when determining the fair value of assets acquired and liabilities assumed. These estimates include, but are not limited to, discount rates, projected future net sales, projected future expected cash flows and useful lives. During the measurement period, fair values assigned to the assets and liabilities may be adjusted as the Company receives additional information.

The Company accounts for all acquisitions using the acquisition method of accounting under ASC 805, Business Combinations, whereby the results of operations of the acquired company are included in the Company’s consolidated financial statements beginning on the acquisition date.

2019 Acquisitions

The Company completed the following acquisitions during the nine months ended September 30, 2019:

•On January 14, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Barefoot and Company (“Barefoot”), a supplier of windows, exterior doors, hardware, specialty products and installation services in the Charlotte, North Carolina metropolitan area.

•On February 8, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Locust Lumber, a supplier of lumber products and building materials primarily to custom homebuilders and professional remodeling contractors in the Charlotte, North Carolina metropolitan area.

•On August 1, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Kingston Lumber, a supplier of lumber products, trusses and other building materials primarily to custom homebuilders and professional remodeling contractors in the Seattle, Washington metropolitan area.

•On September 3, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Heritage One Door & Carpentry (“Heritage One”), a supplier of pre-hung doors, millwork, hardware and finish carpentry services in the Sacramento, California metropolitan area.

•On September 16, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Colorado Fasteners, a supplier of fasteners, tools and other related products in the Denver, Colorado metropolitan area.

The Barefoot, Locust Lumber, Kingston Lumber, Heritage One and Colorado Fasteners acquisitions (the “Acquisitions”) enhance the Company’s value-added offerings and footprint in the respective metropolitan areas.

The purchase price, in aggregate, for the Acquisitions was $89.5 million. The aggregate purchase price included a holdback which, after certain post-closing adjustments, required the Company to pay $4.2 million, in aggregate, to the sellers of certain of

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the Acquisitions during the nine months ended September 30, 2020. The Company funded the Acquisitions through available cash.

The purchase price allocation for the Acquisitions, in aggregate, resulted in the recognition of goodwill of $19.0 million, customer relationship intangible assets of $33.1 million, non-compete agreement intangible assets of $0.5 million, accounts receivable of $22.1 million, inventory of $14.6 million and property and equipment of $5.6 million, as well as other operating assets and liabilities. The customer relationship and non-compete agreement intangible assets have a weighted average useful life of 9 years and 4 years, respectively. Goodwill represents the future economic benefits expected to arise from other intangible assets acquired that do not qualify for separate recognition, including assembled workforce and non-contractual relationships, as well as expected future synergies. All of the goodwill is expected to be deductible for tax purposes.

Net sales and estimated pre-tax earnings for the Acquisitions, in aggregate, included in the unaudited condensed consolidated statements of operations during the three months ended September 30, 2019 were $38.7 million and $2.9 million, respectively. Net sales and estimated pre-tax earnings for the Acquisitions, in aggregate, included in the unaudited condensed consolidated statements of operations during the nine months ended September 30, 2019 were $84.6 million and $7.1 million, respectively. The impact of the Acquisitions was not considered significant for the reporting of pro forma financial information.

5.    Accounts Receivable

Accounts receivable consist of the following at September 30, 2020 and December 31, 2019:

(in thousands)	September 30, 2020		December 31, 2019
Trade receivables	$	403,406	$	334,059
Allowance for doubtful accounts	(6,635)		(5,674)
Other allowances	(3,036)		(2,644)
	$	393,735	$	325,741

The allowance for doubtful accounts is based on an assessment of individual past due accounts, historical write-off experience, accounts receivable aging, customer disputes and the current and forecasted business environment. Account balances are charged off when the potential for recovery is considered remote. The following table shows the changes in the allowance for doubtful accounts for the nine months ended September 30, 2020:

(in thousands)	2020
Balance at January 1	$	5,674
Write-offs	(2,185)
Recoveries	1,247
Increase in allowance	1,899
Balance at September 30	$	6,635

6.    Debt

Long-term debt as of September 30, 2020 and December 31, 2019 consists of the following:

(in thousands)	September 30, 2020		December 31, 2019
Senior secured notes, due 2024	$	350,000	$	350,000
Revolving credit agreement	—		—
	350,000		350,000
Unamortized debt issuance costs related to senior secured notes	(3,341)		(3,968)
	346,659		346,032
Less: Current portion of long-term debt	—		—
	$	346,659	$	346,032

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Senior Secured Notes

On September 15, 2016, the Company issued $350.0 million of senior secured notes due 2024 (the “Senior Notes”) under an unregistered private placement not subject to the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”). The Senior Notes were issued by BMC East, LLC, a 100% owned subsidiary of the Company, and are guaranteed by the Company and the other subsidiaries that guarantee the Credit Agreement (as defined below). Each of the subsidiary guarantors is 100% owned, directly or indirectly, by the Company, and all guarantees are full and unconditional and joint and several. The interest rate is fixed at 5.5% and is payable semiannually on April 1 and October 1.

As of September 30, 2020, the estimated market value of the Senior Notes was approximately $10.3 million higher than the carrying amount. The fair value is based on institutional trading activity and was classified as a Level 2 measurement in accordance with ASC 820.

Revolving Credit Agreement

On December 1, 2015, the Company entered into a senior secured credit agreement with Wells Fargo Capital Finance, as administrative agent, and certain other lenders (the “Original Credit Agreement”), which includes a revolving credit facility (the “Revolver”). The Original Credit Agreement, as amended (the “Credit Agreement), has an aggregate commitment of $425.0 million. The Credit Agreement matures at the earlier of (i) May 31, 2024 and (ii) if the Senior Notes are refinanced or repaid, the date that is 91 days prior to the new maturity date of the replacement notes or other indebtedness that replaced or refinanced the Senior Notes. The Company had no outstanding borrowings under the Revolver with net availability of $362.3 million as of September 30, 2020. The Company had $61.6 million in letters of credit outstanding under the Credit Agreement as of September 30, 2020.

7.    Revenue

Disaggregation of revenue

The following table shows net sales classified by major product category for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2020		2019		2020		2019
Millwork, doors & windows	$	299,812	$	285,750	$	883,480	$	796,807
Structural components	185,910		175,344		510,789		483,575
Lumber & lumber sheet goods	383,626		274,908		935,582		798,722
Other building products & services	220,995		228,247		661,267		656,925
Total net sales	$	1,090,343	$	964,249	$	2,991,118	$	2,736,029

The following table reflects the Company’s estimate of net sales by each customer type for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2020		2019		2020		2019
Single-family homebuilders	$	811,081	$	718,690	$	2,188,240	$	2,064,382
Remodeling contractors	143,536		115,756		375,904		314,277
Multi-family, commercial & other contractors	135,726		129,803		426,974		357,370
Total net sales	$	1,090,343	$	964,249	$	2,991,118	$	2,736,029

Net sales for the Company's building products contracts was $850.9 million, $728.5 million, $2,276.9 million and $2,061.8 million for the three and nine months ended September 30, 2020 and 2019, respectively. Net sales for the Company's construction services contracts, which includes both products and installation services, was $239.5 million, $235.8 million, $714.2 million and $674.3 million for the three and nine months ended September 30, 2020 and 2019, respectively.

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Contract balances

The following table reflects the Company’s contract balances as of September 30, 2020 and December 31, 2019:

(in thousands)	September 30, 2020		December 31, 2019		Change
Receivables, including unbilled receivables presented in prepaid expenses and other current assets	$	409,640	$	333,044	$	76,596
Contract assets	36,422		32,125		4,297
Contract liabilities	$	44,980	$	31,094	$	13,886

During the nine months ended September 30, 2020, the Company’s contract assets increased by $4.3 million and the Company’s contract liabilities increased by $13.9 million. The changes in contract assets and liabilities were primarily due to the timing of revenue recognition, as the balances were not materially impacted by any other factors. For the three and nine months ended September 30, 2020, the Company recognized revenue of $1.4 million and $29.2 million, respectively, that was included in contract liabilities as of December 31, 2019. Revenue recognized related to performance obligations that were satisfied or partially satisfied in previous periods was not material for the three and nine months ended September 30, 2020.

As permitted by ASC 606, Revenue from Contracts with Customers, the Company has elected not to disclose the value of unsatisfied performance obligations, as the Company’s contracts generally have an original expected length of one year or less.

8.    Income Taxes

The Company evaluates its deferred tax assets quarterly to determine if valuation allowances are required. In assessing the realizability of deferred tax assets, the Company considers both positive and negative evidence in determining whether it is more likely than not that some portion or all of the deferred tax assets will not be realized.

The Company had a valuation allowance of $0.2 million against its deferred tax assets related to certain state tax jurisdictions as of September 30, 2020 and $0.1 million as of December 31, 2019. To the extent the Company generates future tax net operating losses, the Company may be required to increase the valuation allowance on deferred tax assets, which may unfavorably impact the effective tax rate.

The Company has no material uncertain tax positions as of September 30, 2020 and December 31, 2019.

For the three and nine months ended September 30, 2020, the Company’s effective tax rate was 23.5% and 23.8%, respectively, which varied from the federal statutory rate of 21% primarily due to state income taxes and nondeductible Merger-related costs. For the three and nine months ended September 30, 2019, the Company’s effective tax rate was 28.2% and 24.9%, respectively, which varied from the federal statutory rate of 21% primarily due to state income taxes and an out of period expense.

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law. The CARES Act provides numerous tax provision and other stimulus measures. The Company expects to benefit from the technical correction related to qualified leasehold improvements, which provides for tax bonus depreciation. If the Company generates a net operating loss (“NOL”) in 2020, it would also expect to benefit from the five-year NOL carryback provisions included in the CARES Act. To the extent that states in which the Company operates provide for similar stimulus measures, the Company will evaluate potential benefits at the state-level as well. For the nine months ended September 30, 2020, the Company recognized a decrease in income taxes payable of $1.4 million and a corresponding increase in its deferred income taxes related to increased bonus depreciation on qualified improvement property allowable under the CARES Act.

9.    Commitments and Contingencies

From time to time, various claims, legal proceedings and litigation are asserted or commenced against the Company principally arising from alleged product liability, warranty, casualty, construction defect, contract, tort, employment and other disputes. In determining loss contingencies, management considers the likelihood of loss as well as the ability to reasonably estimate the amount of such loss or liability. An estimated loss is recorded when it is considered probable that such a liability has been incurred and when the amount of loss can be reasonably estimated. It is not certain that the Company will prevail in these matters. However, the Company does not currently believe that the ultimate outcome of any pending matters will have a material adverse effect on its consolidated financial position, results of operations or cash flows.

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10.    Stock Based Compensation

The following table highlights stock based compensation for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Restricted stock units (a)	$	4,612	$	3,014	$	10,748	$	9,177
Stock options (b)	—		—		362		—
Stock based compensation	$	4,612	$	3,014	$	11,110	$	9,177

(a) Includes service-based and performance-based restricted stock units.

(b) Represents expense related to a modification of vested stock options.

During the three and nine months ended September 30, 2020, the Company granted less than 0.1 million and 0.4 million service-based restricted stock unit awards, respectively. In addition, during the nine months ended September 30, 2020, the Company granted performance-based restricted stock units that allow for a maximum of 0.2 million performance-based restricted stock units to be earned.

During the nine months ended September 30, 2019, the Company granted 0.5 million service-based restricted stock unit awards and performance-based restricted stock units that allow for a maximum of 0.4 million performance-based restricted stock units to be earned.

11.    Segments

ASC 280, Segment Reporting, defines operating segments as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to allocate resources and in assessing performance.

The Company’s operating segments consist of the Mid-Atlantic, Southeast, Texas, Intermountain and Western divisions. The CODM reviews aggregate information to allocate resources and assess performance. Based on the CODM’s review, as well as the similar economic characteristics, nature of products, distribution methods and customers of the divisions, the Company has aggregated its operating segments into one reportable segment, “Geographic divisions.”

In addition to the Company’s reportable segment, the Company’s consolidated results include “Other reconciling items.” Other reconciling items comprises the Company’s corporate activities and other income and expenses not allocated to the operating segments.

The following tables present Net Sales, Adjusted EBITDA and certain other measures for the reportable segment and total Company operations for the three and nine months ended September 30, 2020 and 2019. Adjusted EBITDA is used as a performance metric by the CODM in determining how to allocate resources and assess performance.

	Three Months Ended September 30, 2020
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	1,090,343	$	273,082	$	19,941	$	114,149
Other reconciling items	—		—		512		(14,961)
	$	1,090,343	$	273,082	$	20,453

	Three Months Ended September 30, 2019
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	964,249	$	254,767	$	17,974	$	96,752
Other reconciling items	—		—		561		(22,094)
	$	964,249	$	254,767	$	18,535

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	Nine Months Ended September 30, 2020
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	2,991,118	$	763,032	$	59,218	$	300,991
Other reconciling items	—		—		1,529		(50,448)
	$	2,991,118	$	763,032	$	60,747

	Nine Months Ended September 30, 2019
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	2,736,029	$	716,666	$	51,121	$	260,537
Other reconciling items	—		—		1,838		(58,150)
	$	2,736,029	$	716,666	$	52,959

Reconciliation to consolidated financial statements:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2020		2019		2020		2019
Income before income taxes	$	58,701	$	46,787	$	144,980	$	119,326
Interest expense	5,744		5,773		17,880		17,385
Interest income	(224)		(1,047)		(1,146)		(2,832)
Depreciation and amortization	20,453		18,535		60,747		52,959
Merger-related costs	8,488		—		9,150		—
Acquisition and integration costs (a)	1,377		1,524		4,566		6,294
Non-cash stock compensation expense	4,612		3,014		11,110		9,177
Business reorganization costs (b)	37		72		3,256		300
Other items (c)	—		—		—		(222)
Adjusted EBITDA of other reconciling items	14,961		22,094		50,448		58,150
Adjusted EBITDA of geographic divisions reportable segment	$	114,149	$	96,752	$	300,991	$	260,537

(a) Represents costs for acquisitions and related integration costs, as well as system integration and other costs related to the integration of BMHC and SBS as a result of the 2015 merger transaction.

(b) For the three and nine months ended September 30, 2020, represents asset impairment and other charges related to the closure or relocation of the operations of certain of the Company’s facilities, which were not related to the COVID-19 pandemic, and severance expense related to permanent headcount reductions due to the impact of the COVID-19 pandemic. For the three and nine months ended September 30, 2019, represents asset impairment charges and the effect of certain customary post-closing adjustments related to the November 1, 2018 disposition of the Company’s Coleman Floor business.

(c) For the nine months ended September 30, 2019, represents income from a recovery made by the Company related to a fire at one of the Company’s facilities during 2015 and the effect of the settlement of pending litigation for an amount below what was previously accrued.

12.    Earnings Per Share

Basic net income per share (“EPS”) is calculated by dividing net income attributable to common stockholders by the weighted average shares outstanding during the period. Diluted EPS is calculated by adjusting weighted average shares outstanding for the dilutive effect of potential common shares, determined using the treasury-stock method. For purposes of the diluted EPS calculation, stock options and restricted stock unit awards are considered to be potential common shares. Performance-based restricted stock units are not included in the calculation of diluted EPS until they are contingently issuable.

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The basic and diluted EPS calculations for the three and nine months ended September 30, 2020 and 2019 are presented below:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share amounts)	2020		2019		2020		2019
Income attributable to common stockholders	$	44,895	$	33,597	$	110,546	$	89,646
Weighted average common shares outstanding, basic	67,141		66,685		67,001		66,681
Effect of dilutive securities:
Restricted stock units (a)	682		544		602		450
Stock options	144		132		122		109
Weighted average common shares outstanding, diluted	67,967		67,361		67,725		67,240
Basic income per common share	$	0.67	$	0.50	$	1.65	$	1.34
Diluted income per common share	$	0.66	$	0.50	$	1.63	$	1.33

(a) Includes service-based and contingently issuable performance-based restricted stock units.

For the three and nine months ended September 30, 2020 and 2019, there were no anti-dilutive restricted stock units or stock options. As of September 30, 2020, the number of currently outstanding performance-based restricted stock units that are issued upon vesting could range from zero to a maximum of 0.9 million.

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ITEM 2    MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis should be read in conjunction with our historical consolidated financial statements and the notes thereto included elsewhere in this Quarterly Report on Form 10-Q and with our audited financial statements included in our 2019 Annual Report on Form 10-K. All references to “BMC,” “we,” “us,” “our” or the “Company” mean BMC Stock Holdings, Inc. and its subsidiaries.

Cautionary Statement with Respect to Forward-Looking Statements

Some of the statements contained in this Quarterly Report on Form 10-Q constitute 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. Forward-looking statements relate to expectations, beliefs, projections, future plans and strategies, anticipated events or trends and similar expressions concerning matters that are not historical facts or present facts or conditions. In many cases, you can identify forward-looking statements by terms such as “may,” “will,” “should,” “expects,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “potential” or the negative of these terms or other comparable terminology.

The forward-looking statements reflect our views about future events and are subject to risks, uncertainties, assumptions and changes in circumstances that may cause events or our actual activities or results to differ significantly from those expressed in any forward-looking statement, and many of these risks and uncertainties are, and may continue to be, amplified by the COVID-19 pandemic. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future events, results, actions, levels of activity, performance or achievements. A number of important factors could cause actual results to differ materially from those indicated by the forward-looking statements. These factors include, without limitation:

•the impact of the COVID-19 pandemic on our business operations and on local, national and global economies;

•the state of the homebuilding industry and repair and remodeling activity, the economy and the credit markets;

•fluctuation of commodity prices and prices of our products as a result of national and international economic and other conditions;

•the impact of potential changes in our customer or product sales mix;

•our concentration of business in the Texas, California and Georgia markets;

•the potential loss of significant customers or a reduction in the quantity of products they purchase;

•seasonality and cyclicality of the building products supply and services industry;

•competitive industry pressures and competitive pricing pressure from our customers and competitors;

•our exposure to product liability, warranty, casualty, construction defect, contract, tort, employment and other claims and legal proceedings;

•our ability to maintain profitability and positive cash flows;

•our ability to retain our key employees and to attract and retain new qualified employees, while controlling our labor costs;

•product shortages, loss of key suppliers or failure to develop relationships with qualified suppliers, and our dependence on third-party suppliers and manufacturers;

•the implementation of our supply chain and technology initiatives;

•the impact of long-term noncancellable leases at our facilities;

•our ability to effectively manage inventory and working capital;

•the credit risk from our customers;

•our ability to identify or respond effectively to consumer needs, expectations, market conditions or trends;

•our ability to successfully implement our growth strategy;

•the impact of federal, state, local and other laws and regulations;

•the impact of changes in legislation and government policy;

•the impact of unexpected changes in our tax provisions and adoption of new tax legislation;

•our ability to utilize our net operating loss carryforwards;

•natural or man-made disruptions to our distribution and manufacturing facilities;

•our exposure to environmental liabilities and subjection to environmental laws and regulation;

•the impact of health and safety laws and regulations;

•the impact of disruptions to our information technology systems;

•cybersecurity risks;

•our exposure to losses if our insurance coverage is insufficient;

•our ability to operate on multiple Enterprise Resource Planning (“ERP”) information systems and convert multiple systems to a single system;

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•the impact of our indebtedness;

•the impact of the various financial covenants in our secured credit agreement and senior secured notes indenture;

•the completion of the merger with Builders FirstSource, including the receipt of required approvals and satisfying the other closing conditions;

•the disruption to and restrictions placed on our business in connection with the merger with Builders FirstSource; and

•the incurrence of costs related to the merger with Builders FirstSource.

Certain of these and other factors are discussed in more detail in “Item 1A. Risk Factors” of our 2019 Annual Report on Form 10-K, as supplemented in “Item 1A. Risk Factors” of this Quarterly Report on Form 10-Q. The forward-looking statements included herein are made only as of the date of this Quarterly Report on Form 10-Q and we undertake no obligation to publicly update or review any forward-looking statement made by us or on our behalf, whether as a result of new information, future developments, subsequent events or circumstances or otherwise, unless otherwise required by law.

Overview

We are one of the leading providers of diversified building products and services in the U.S. residential construction market. Our objective is to provide best-in-class customer service and value-added products to our customers, which are primarily single- and multi-family home builders and professional remodelers. Our product offerings include lumber and lumber sheet goods and an array of value-added products including millwork, doors, windows and structural components such as engineered wood products, floor and roof trusses and wall panels. We believe our whole-house framing solution, Ready-Frame®, which is one of our fastest growing product offerings, saves builders both time and money and improves job site safety. We also offer our customers important services such as design, product specification, installation and installation management.

The 18 states in which we operate accounted for approximately 66% of 2019 U.S. single-family housing permits according to the U.S. Census Bureau. In these 18 states, we operate in 45 metropolitan areas.

Our net sales for the three months ended September 30, 2020 increased 13.1% compared to the prior year period. Our gross profit as a percentage of sales (“gross margin”) was 25.0% for the three months ended September 30, 2020 compared to 26.4% for the prior year period. We recorded income from operations of $61.2 million during the three months ended September 30, 2020 compared to $49.0 million during the three months ended September 30, 2019. See further discussion in “-Operating Results” below.

COVID-19 Update

In December 2019, a novel strain of coronavirus (COVID-19) surfaced in Wuhan, China. Since then, the virus has spread globally, including to the United States. Public health organizations and international, federal, state and local governments have implemented measures to combat the spread of COVID-19, including restrictions on movement such as quarantines, “stay-at-home” orders and social distancing ordinances and restricting or prohibiting outright some or all forms of commercial and business activity. The pandemic has adversely affected many industries as well as the economies and financial markets of many countries, including the United States, causing a significant deceleration of economic activity, including reduced production, decreased demand for a broad variety of goods and services, diminished trade-levels and widespread corporate downsizing.

To date, the Company’s and our customers’ businesses have generally been classified as “essential business” in most of the jurisdictions in which we operate, permitting the Company and its customers to continue operations in most of the Company’s markets. However, beginning in March 2020, the Company significantly reduced operations in the State of Washington, which represented approximately 5% of the Company’s net sales for the year ended December 31, 2019. We also temporarily reduced or otherwise limited operations in other jurisdictions, including Pennsylvania and portions of northern California that implemented restrictions on construction activity. In May and June 2020, these jurisdictions reopened building construction. We and our customers may need to make further reductions in operations in the future if more preventive measures are implemented or if we or our customers voluntarily limit or cease operations in one of our markets. Even in certain of our markets where our and our customers’ operations have not been limited by voluntary or involuntary measures, certain customers have decreased purchases of our products in response to the various impacts of COVID-19 on their business.

Certain of our suppliers across our markets have either reduced or ceased production in some or all of their facilities in response to the COVID-19 pandemic. Although these actions did not have a material negative impact on our results of operations for the three and nine months ended September 30, 2020, we expect that these actions, along with any further reductions in production levels of our suppliers, may limit the supply of certain materials or extend lead times, which could, among other things, cause the cost of materials we purchase to rise or limit our ability to procure the materials we need to fulfill customer demand. Recently, due in part to the continued impacts of COVID-19 on certain suppliers, the supply of certain products, including

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interior doors, lumber, structural panels, vinyl windows and engineered wood products (“EWP”), has been significantly curtailed, increasing lead times. The impact of COVID-19 has also led to significant volatility in market prices for wood products during the three and nine months ended September 30, 2020. See further discussion of the volatility and the impact of commodity prices on our business in “Commodity nature of our products” below. Additionally, we enter into arrangements with many of our suppliers providing for inventory purchase rebates (“supplier rebates”) upon achievement of specified volume purchasing levels. Should we not achieve specified volume purchasing levels as a result of the impacts of COVID-19 and as such, reduce our supplier rebate income, our margins and profitability would be negatively impacted.

We have taken a number of precautionary measures intended to mitigate the impact of COVID-19 on our business and the risk to our employees. These include implementation of detailed cleaning and disinfecting processes at our facilities, adhering to social distancing protocols, suspending non-essential air travel, implementing appropriate reductions in workforce, including furloughs, and encouraging employees to work from home when possible. See “Liquidity and Capital Resources” below for a discussion of other precautionary measures taken with respect to our liquidity and financial position in response to the pandemic.

On March 27, 2020, the CARES Act was signed into law. The CARES Act provides numerous tax provision and other stimulus measures. We have benefited from, and expect to continue benefiting from, the temporary suspension of certain payment requirements for the employer portion of Social Security taxes. We estimate that this will defer approximately $23 million of payments that would have been paid during 2020, such that under the CARES Act, approximately $11.5 million will now be paid on December 31, 2021 and the remaining $11.5 million will be paid on December 31, 2022. We also expect to benefit from the creation of certain refundable employee retention credits and the technical correction for qualified leasehold improvements, which provides for tax bonus depreciation. If we generate a NOL in 2020, we would also expect to benefit from the five-year NOL carryback provisions. To the extent that states in which the Company operates provide for similar stimulus measures, we will evaluate potential benefits at the state-level as well.

Due to the unprecedented nature and considerable uncertainty surrounding the COVID-19 pandemic and its impact on our industry and global economies and markets as a whole, we are unable to identify all potential risks, uncertainties and consequences or predict the full extent and scope of the ultimate impact of the COVID-19 pandemic on our business, financial condition, operating results and cash flows as well as our future plans and strategies. See “Item 1A. Risk Factors” for additional discussion regarding risks related to the COVID-19 pandemic.

Factors Affecting Our Operating Results

Our operating results and financial performance are influenced by a variety of factors, including, among others, conditions in the housing market and economic conditions generally, acquisitions and closures, changes in the cost of the products we sell (particularly commodity products), pricing policies of our competitors, production schedules of our customers and seasonality. Some of the more important factors are discussed in our 2019 Annual Report on Form 10-K, as supplemented by the additional discussion below. In addition, as discussed above and below, we expect the COVID-19 pandemic and the responses by governments, us and our customers and suppliers will impact our operating results for at least the remainder of 2020.

Conditions in the housing and construction market

The building products supply and services industry is highly dependent on new single-family home and multi-family construction and repair and remodeling activity, which in turn are dependent upon a number of factors, including, among other things, overall economic conditions. Unfavorable economic changes, both nationally and locally in our markets, could adversely affect consumer spending, result in decreased demand for new homes and adversely affect our business.

According to the U.S. Census Bureau, single-family housing starts in the South and West regions of the United States, which are our primary operating regions, increased approximately 17.3% for the three months ended September 30, 2020 compared to the same period in the prior year. However, the COVID-19 pandemic may have a negative impact in future periods on our customers and the homebuilding industry as it may affect, among other factors, employment levels, consumer spending and consumer confidence, which could decrease demand for new homes, adversely affecting our business.

Acquisitions and closures

The Company completed the following acquisitions during the year ended December 31, 2019 (the “2019 Acquisitions”):

•On January 14, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Barefoot, a supplier of windows, exterior doors, hardware, specialty products and installation services in the Charlotte, North Carolina metropolitan area.

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•On February 8, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Locust Lumber, a supplier of lumber products and building materials primarily to custom homebuilders and professional remodeling contractors in the Charlotte, North Carolina metropolitan area.

•On August 1, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Kingston Lumber, a supplier of lumber products, trusses and other building materials primarily to custom homebuilders and professional remodeling contractors in the Seattle, Washington metropolitan area.

•On September 3, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Heritage One, a supplier of pre-hung doors, millwork, hardware and finish carpentry services in the Sacramento, California metropolitan area.

•On September 16, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Colorado Fasteners, a supplier of fasteners, tools and other related products in the Denver, Colorado metropolitan area.

•On December 2, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of DeFord Lumber (“DeFord”), a supplier of millwork, doors, windows, structural components and other building materials primarily to custom and regional homebuilders in the Dallas-Fort Worth metropolitan area.

During the three and nine months ended September 30, 2020, the Company closed certain of its facilities, including facilities in Greensboro, NC and Greenville, SC, which were not related to the COVID-19 pandemic and were not material to our operations. Additionally, as of December 31, 2019, the Company ceased conducting business in its Arkansas market, which accounted for less than 1% of the Company's net sales for the year ended December 31, 2019.

Net sales increased by approximately $24.1 million for the three months ended September 30, 2020 as a result of the Kingston Lumber, Heritage One, Colorado Fasteners and DeFord acquisitions (the “Recent Acquisitions”), net of closed facilities.

Due to the impact of COVID-19, the Company’s acquisition activity has been and may continue to be curtailed in the near-term to preserve liquidity. In addition, the Merger Agreement restricts us from making certain acquisitions and taking other specified strategic actions without the consent of Builders FirstSource.

See “Liquidity and Capital Resources” below for a discussion of precautionary measures taken with respect to our liquidity and financial position in response to the pandemic and “-Merger Agreement with Builders FirstSource, Inc.” below for a discussion of the Merger and the Merger Agreement.

Commodity nature of our products

Many of the building products we distribute, including lumber, oriented strand board (“OSB”), plywood and particleboard, are commodities that are widely available from other manufacturers or distributors with prices and volumes determined frequently based on participants’ perceptions of short-term supply and demand factors.

The following table reflects changes in the average composite framing lumber prices (per thousand board feet) and average composite structural panel prices (per thousand square feet). These prices represent transactions between manufacturers and their customers as reported by Random Lengths and may differ in magnitude or timing from the actual selling prices or cost of goods reported in our operating results. The average composite structural panel prices are based on index prices for OSB and plywood.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020 versus 2019		2020 average price		2020 versus 2019		2020 average price
Framing lumber prices	113.4	%	$	762	48.7	%	$	525
Structural panel prices	102.4	%	$	682	38.8	%	$	490

Due to the impact of the COVID-19 pandemic on lumber production of suppliers and the commodity markets in general, there was significant volatility in commodity prices during the three and nine months ended September 30, 2020. The average composite framing lumber prices and average composite structural panel prices began decreasing in the second half of March 2020 and continued to decrease until May 2020, when prices began to increase rapidly. Prices continued to increase until October 2020, when prices began to decrease again. As of October 31, 2020, the composite framing lumber price and composite structural panel price were $610 and $705, respectively. Due to changes in supply and demand in the commodity markets from COVID-19, there may be additional volatility in commodity prices in the future.

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Periods of increasing prices provide the opportunity for higher sales and increased gross profit, while periods of declining prices may result in declines in sales and profitability. In particular, low market prices for wood products over a sustained period can adversely affect our financial condition, operating results and cash flows, as can excessive spikes in market prices. The impact of commodity price changes on our operating results is partially dependent on pricing commitments with our customers. For further discussion of the impact of commodity prices on historical periods, see “-Operating Results” below.

Mix of products sold

We typically realize greater gross margins on more highly engineered and customized products, or ancillary products that are often purchased based on convenience and are therefore less price sensitive to our customers. For example, sales of lumber and lumber sheet goods tend to generate lower gross margins due to their commodity nature and the relatively low switching costs of sourcing those products from different suppliers. Structural components and millwork, doors and windows often generate higher gross margins relative to other products. Should the impact of COVID-19 cause supply chain limitations of certain products or cause customers to change the types or quantities of materials they purchase from us, we could see a change in the mix of products sold, impacting, among other things, our gross margin. For example, during the three months ended September 30, 2020, due to commodity price inflation, a higher percentage of total net sales was derived from lumber and lumber sheet goods as compared to the three months ended September 30, 2019. For further discussion of the impact of mix of products sold on historical periods, see “-Operating Results” below.

Changes in customer sales mix

Our operating results may vary according to the amount and type of products we sell to each of our primary customer types: single-family homebuilders, remodeling contractors and multi-family, commercial and other contractors. We tend to realize higher gross margins on sales to remodeling contractors due to the smaller product volumes purchased by those customers, as well as the more customized nature of the projects those customers generally undertake. Gross margins on sales to our other primary customer types can vary based on a variety of factors. If the COVID-19 pandemic has a greater impact on one or more of our primary customer types, or on certain customers within our primary customer types, we could see a change in our customer sales mix, which could, among other things, impact our gross margin.

Seasonality

Our first and fourth quarters have historically been, and are generally expected to continue to be, adversely affected by weather patterns in some of our markets, causing reduced construction activity. As a result, sales are usually lower in the first and fourth quarters than in the second and third quarters.

Merger Agreement with Builders FirstSource, Inc.

On August 26, 2020, the Company, Builders FirstSource and Merger Sub entered into the Merger Agreement, pursuant to which the Company and Builders FirstSource will combine in an all-stock merger transaction. Upon the terms and subject to the conditions set forth in the Merger Agreement, at the Effective Time, Merger Sub will merge with and into the Company, with the Company continuing as the surviving corporation and becoming a wholly owned subsidiary of Builders FirstSource, with Builders FirstSource identified as the accounting acquirer.

Under the terms of the Merger Agreement, which has been unanimously approved by the board of directors of each company, at the Effective Time, each issued and outstanding share of BMC Common Stock will automatically be converted into the right to receive 1.3125 shares of BLDR Common Stock. No fractional shares of BLDR Common Stock will be issued in the Merger, and holders of shares of BMC Common Stock will receive cash in lieu of any such fractional shares. Upon consummation of the Merger, Builders FirstSource’s stockholders will own approximately 57% and the Company’s stockholders will own approximately 43% of the combined company.

Each outstanding BMC stock option held by a current employee or service-provider will become, at the Effective Time, an option to purchase shares of BLDR Common Stock, with the number of shares and the exercise price adjusted by the Exchange Ratio. Each outstanding BMC stock option held by any former BMC employee or service-provider will be converted at the Effective Time into the right to receive cash in an amount equal to the product of (i) the number of shares of BMC Common Stock subject to such BMC stock option as of immediately prior to the Effective Time and (ii) the excess of the market value of 1.3125 shares of BLDR Common Stock over the applicable exercise price per share of such option, subject to applicable withholding taxes. Each outstanding BMC time-vested and performance-vested restricted stock unit will vest and settle at the Effective Time in a number of shares of BLDR Common Stock equal to the number of shares of BMC Common Stock otherwise issuable upon settlement of such BMC restricted stock unit (assuming target level of performance for performance-vested awards), multiplied by the Exchange Ratio, and subject to applicable withholding taxes.

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The Merger is intended to qualify as a tax-free reorganization under the Internal Revenue Code so that none of the Company, Builders FirstSource, Merger Sub, or any of the Company’s stockholders generally will recognize any gain or loss on the issuance or receipt of BLDR Common Stock in the Merger, except that the Company’s stockholders generally may recognize gain or loss with respect to cash received in lieu of fractional shares of BLDR Common Stock.

The Company and Builders FirstSource have made customary representations, warranties and covenants in the Merger Agreement, including covenants regarding the conduct of their respective businesses during the pre-closing period and their use of reasonable best efforts to consummate the Merger. In addition, the Merger Agreement contains restrictions on the Company’s and Builders FirstSource’s ability to (i) solicit competing acquisition proposals and (ii) subject to certain exceptions if their respective boards of directors determine it would be inconsistent with their fiduciary duties, to participate in any discussions or negotiations, or provide any non-public information, or take other actions in furtherance of or relating to any competing acquisition proposals, or change, withdraw, qualify, or modify the recommendation by the Company’s or Builders FirstSource’s board of directors to their respective stockholders to adopt the Merger Agreement and approve the Stock Issuance, respectively.

The Merger Agreement contains certain termination rights for both the Company and Builders FirstSource, including (i) if the Merger is not consummated on or before the “outside date” of May 26, 2021 (subject to extension to August 26, 2021, under certain circumstances), (ii) if the required approval of the Company’s stockholders or Builders FirstSource’s stockholders is not obtained, (iii) if any law or order prohibiting the Merger or the Stock Issuance has become final and non-appealable, (iv) if the board of directors of the other party changes its recommendation of the Merger prior to the receipt of its stockholder approval, (v) if the other party breaches its obligation not to solicit competing acquisition proposals in any material respect, or (vi) if the other party breaches its representations or warranties or fails to perform its covenants and such breach would cause a failure of the related closing condition and either is not curable by the outside date or is not cured within thirty days of notice of the breach. Upon termination of the Merger Agreement, under certain specified circumstances, the Company may be required to pay a termination fee of $66 million to Builders FirstSource or Builders FirstSource may be required to pay a termination fee of $100 million to the Company.

See “Item 1A. Risk Factors” of this Quarterly Report on Form 10-Q for additional information regarding certain risks related to the Merger and its potential impacts on our business and results of operations.

For further information related to the Merger, please refer to the Company’s Current Report on Form 8-K filed with the SEC on August 27, 2020. The foregoing description of the Merger Agreement is not complete and is qualified in its entirety by reference to the full text of the Merger Agreement included as Exhibit 2.1 to the Company’s Current Report on Form 8-K filed with the SEC on August 27, 2020 and incorporated by reference in this Quarterly Report on Form 10-Q.

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Operating Results

The following table sets forth our operating results in dollars and as a percentage of net sales for the periods indicated:

	Three Months Ended September 30,								Nine Months Ended September 30,
(in thousands)	2020				2019				2020				2019
Net sales	$	1,090,343	100.0	%	$	964,249	100.0	%	$	2,991,118	100.0	%	$	2,736,029	100.0	%
Cost of sales	817,261		75.0	%	709,482		73.6	%	2,228,086		74.5	%	2,019,363		73.8	%
Gross profit	273,082		25.0	%	254,767		26.4	%	763,032		25.5	%	716,666		26.2	%
Operating expenses:
Selling, general and administrative expenses	195,143		17.9	%	190,579		19.8	%	557,010		18.6	%	546,116		20.0	%
Depreciation expense	11,767		1.1	%	10,501		1.1	%	34,990		1.2	%	30,117		1.1	%
Amortization expense	5,016		0.5	%	4,552		0.5	%	15,045		0.5	%	13,237		0.5	%
Impairment of assets	—		0.0	%	115		0.0	%	2,255		0.1	%	644		0.0	%
Income from operations	61,156		5.6	%	49,020		5.1	%	153,732		5.1	%	126,552		4.6	%
Other income (expense)
Interest expense	(5,744)		(0.5)	%	(5,773)		(0.6)	%	(17,880)		(0.6)	%	(17,385)		(0.6)	%
Other income, net	3,289		0.3	%	3,540		0.4	%	9,128		0.3	%	10,159		0.4	%
Income before income taxes	58,701		5.4	%	46,787		4.9	%	144,980		4.8	%	119,326		4.4	%
Income tax expense	13,806		1.3	%	13,190		1.4	%	34,434		1.2	%	29,680		1.1	%
Net income	$	44,895	4.1	%	$	33,597	3.5	%	$	110,546	3.7	%	$	89,646	3.3	%

Three months ended September 30, 2020 compared to three months ended September 30, 2019

Net sales

For the three months ended September 30, 2020, net sales increased $126.1 million, or 13.1%, to $1,090.3 million from $964.2 million during the three months ended September 30, 2019. We estimate that net sales increased 10.0% from price inflation within the lumber and lumber sheet goods and structural components product categories, 3.5% from the Recent Acquisitions and 0.6% from other organic growth, partially offset by a decrease of 1.0% from closed facilities. Other organic growth was negatively impacted by the COVID-19 pandemic, particularly in jurisdictions that implemented restrictions on construction activity.

We estimate approximately 74% of our net sales for the three months ended September 30, 2020 were to customers engaged in new single-family construction. According to the U.S. Census Bureau, single-family housing starts in the South and West regions of the United States, which are our primary operating regions, increased approximately 17.3% for the three months ended September 30, 2020 compared to the same period in the prior year, while single-family houses completed increased approximately 6.1% during the same period. We estimate that net sales to single-family homebuilders and remodeling contractors increased 14.4% in the aggregate and net sales to multi-family, commercial and other contractors increased 4.6%.

The following table shows net sales classified by major product category:

	Three Months Ended September 30, 2020				Three Months Ended September 30, 2019
(in thousands)	Net Sales		% of Sales		Net Sales		% of Sales		% Change
Millwork, doors & windows	$	299,812	27.5	%	$	285,750	29.6	%	4.9	%
Structural components	185,910		17.1	%	175,344		18.2	%	6.0	%
Lumber & lumber sheet goods	383,626		35.2	%	274,908		28.5	%	39.5	%
Other building products & services	220,995		20.2	%	228,247		23.7	%	(3.2)	%
Total net sales	$	1,090,343	100.0	%	$	964,249	100.0	%	13.1	%

The increase in net sales in our lumber and lumber sheet goods product category was primarily related to commodity price inflation.

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Cost of sales

For the three months ended September 30, 2020, cost of sales increased $107.8 million, or 15.2%, to $817.3 million from $709.5 million during the three months ended September 30, 2019. We estimate our cost of sales increased 11.2% as a result of commodity cost inflation, 3.3% from the Recent Acquisitions and 1.8% from other organic growth, partially offset by a decrease of 1.1% from closed facilities.

Gross profit

For the three months ended September 30, 2020, gross profit increased $18.3 million, or 7.2%, to $273.1 million from $254.8 million for the three months ended September 30, 2019, driven primarily by commodity price increases and the Recent Acquisitions. Our gross margin was 25.0% for the three months ended September 30, 2020 and 26.4% for the three months ended September 30, 2019. This decrease was primarily due to a decrease in the gross margin in the lumber and lumber sheet goods and structural components product categories, and a higher percentage of total net sales being derived from lumber and lumber sheet goods. Gross margins in our lumber and lumber sheet goods and structural components product categories were lower due to a significant increase in commodity costs, which increased at a faster rate than our average selling prices.

For the three months ended September 30, 2020:

•selling, general and administrative expenses were $195.1 million, an increase of $4.6 million, or 2.4%, from $190.6 million for the three months ended September 30, 2019. This increase was primarily related to an increase of approximately $8.5 million from costs incurred in relation to the Merger described in “-Merger Agreement with Builders FirstSource, Inc.” above and $7.6 million related to selling, general and administrative expenses of the Recent Acquisitions. These increases were offset by an $11.5 million decrease in other selling, general and administrative expenses, primarily related to employee wages, benefits and other employee-related costs, as well as lower fuel costs.

•depreciation expense was $11.8 million compared to $10.5 million for the three months ended September 30, 2019. This increase resulted from the depreciation of assets placed into service.

•amortization expense was $5.0 million compared to $4.6 million for the three months ended September 30, 2019. This increase resulted from the amortization of intangible assets acquired in the Recent Acquisitions.

We expect our selling, general and administrative expenses to continue to be impacted by the COVID-19 pandemic as we have implemented measures to reduce our operating expenses to preserve liquidity. While certain cost reduction measures, such as permanent headcount reductions, are more permanent in nature, others, such as reductions in travel and certain other costs, are more temporary in nature. Further, certain variable costs, such as commissions, will fluctuate with changes in net sales. It is also possible that bad debt expense may increase if the effects of COVID-19 impact our customers’ liquidity and their ability to pay our outstanding receivables. We also anticipate incurring additional selling, general and administrative expenses in connection with the Merger through the Effective Time. As such, our selling, general and administrative expenses may increase in the future compared to the three months ended September 30, 2020 due to these factors, among others.

Interest expense

For the three months ended September 30, 2020 and 2019, interest expense was $5.7 million and $5.8 million, respectively. Non-cash amortization of debt issuance costs, which is included in interest expense, was $0.3 million for the three months ended September 30, 2020 and 2019.

Other income, net

For the three months ended September 30, 2020 and 2019, other income, net, which was derived primarily from state and local tax incentive programs, interest income and service charges assessed on past due accounts receivable, was $3.3 million and $3.5 million, respectively.

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Income tax

For the three months ended September 30, 2020, income tax expense was $13.8 million compared to $13.2 million for the three months ended September 30, 2019. The effective tax rate for the three months ended September 30, 2020 was 23.5%, which varied from the federal statutory rate of 21% primarily due to state income taxes and nondeductible Merger-related costs. The effective tax rate for the three months ended September 30, 2019 was 28.2%, which varied from the federal statutory rate of 21% primarily due to state income taxes and an out of period adjustment.

Nine months ended September 30, 2020 compared to nine months ended September 30, 2019

Net sales

For the nine months ended September 30, 2020, net sales increased $255.1 million, or 9.3%, to $2,991.1 million from $2,736.0 million during the nine months ended September 30, 2019. We estimate that net sales increased 4.4% from the 2019 Acquisitions, 4.1% from price inflation within the lumber and lumber sheet goods and structural components product categories, 1.0% from other organic growth and 0.6% from an additional selling day versus the prior year period, partially offset by a decrease of 0.8% from closed facilities. Other organic growth was negatively impacted by the effects of the COVID-19 pandemic, particularly in jurisdictions that implemented restrictions on construction activity.

We estimate approximately 73% of our net sales for the nine months ended September 30, 2020 were to customers engaged in new single-family construction. According to the U.S. Census Bureau, single-family housing starts in the South and West regions of the United States, which are our primary operating regions, increased approximately 6.3% for the nine months ended September 30, 2020 compared to the same period in the prior year, while single-family houses completed increased approximately 3.4% during the same period. We estimate that net sales to single-family homebuilders and remodeling contractors increased 7.8% in the aggregate and net sales to multi-family, commercial and other contractors increased 19.5%.

The following table shows net sales classified by major product category:

	Nine Months Ended September 30, 2020				Nine Months Ended September 30, 2019
(in thousands)	Net Sales		% of Sales		Net Sales		% of Sales		% Change
Millwork, doors & windows	$	883,480	29.5	%	$	796,807	29.1	%	10.9	%
Structural components	510,789		17.1	%	483,575		17.7	%	5.6	%
Lumber & lumber sheet goods	935,582		31.3	%	798,722		29.2	%	17.1	%
Other building products & services	661,267		22.1	%	656,925		24.0	%	0.7	%
Total net sales	$	2,991,118	100.0	%	$	2,736,029	100.0	%	9.3	%

The increase in net sales in our millwork, doors and windows product category was primarily related to the 2019 Acquisitions and other organic growth. The increase in net sales in our lumber and lumber sheet goods product category was primarily related to commodity price inflation.

Cost of sales

For the nine months ended September 30, 2020, cost of sales increased $208.7 million, or 10.3%, to $2,228.1 million from $2,019.4 million during the nine months ended September 30, 2019. We estimate our cost of sales increased 4.8% as a result of commodity cost inflation, 4.3% from the 2019 Acquisitions, 1.4% from other organic growth and 0.6% from an additional selling day versus the prior year period, partially offset by a decrease of 0.8% from closed facilities.

Gross profit

For the nine months ended September 30, 2020, gross profit increased $46.4 million, or 6.5%, to $763.0 million from $716.7 million for the nine months ended September 30, 2019, driven primarily by the 2019 Acquisitions, commodity price inflation and other organic growth. Our gross margin was 25.5% for the nine months ended September 30, 2020 and 26.2% for the nine months ended September 30, 2019. This decrease was primarily due to a decrease in the gross margin in the lumber and lumber sheet goods and structural components product categories, and a higher percentage of total net sales being derived from lumber and lumber sheet goods. Gross margins in our lumber and lumber sheet goods and structural components product categories were lower due to a significant increase in commodity costs, which increased at a faster rate than our average selling prices.

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Operating expenses

For the nine months ended September 30, 2020:

•selling, general and administrative expenses were $557.0 million, up $10.9 million, or 2.0%, from $546.1 million for the nine months ended September 30, 2019. Excluding the $4.3 million impact of an out of period correction during the nine months ended September 30, 2019, selling, general and administrative expenses increased $15.2 million. Other factors impacting selling, general and administrative expense were an increase of $27.3 million from selling, general and administrative expenses of the 2019 Acquisitions and $9.2 million of Merger-related costs in relation to the Merger described in “-Merger Agreement with Builders FirstSource, Inc.” above. These increases were offset by an $21.3 million decrease in other selling, general and administrative expenses, primarily related to employee wages, benefits and other employee-related costs, as well as lower fuel costs.

•depreciation expense was $35.0 million compared to $30.1 million for the nine months ended September 30, 2019. This increase resulted from the depreciation of assets placed into service.

•amortization expense was $15.0 million compared to $13.2 million for the nine months ended September 30, 2019. This increase resulted from the amortization of intangible assets acquired in the 2019 Acquisitions.

•the Company recognized asset impairment charges of $2.3 million related to the closure or relocation of the operations of certain of the Company’s facilities, which were not related to the COVD-19 pandemic. For the nine months ended September 30, 2019, the Company recognized asset impairment charges of $0.6 million related to the relocation of the operations of certain of the Company’s facilities.

Interest expense

For the nine months ended September 30, 2020 and 2019, interest expense was $17.9 million and $17.4 million, respectively. This increase was primarily related to interest expense from precautionary borrowings made under our revolving credit facility during the three months ended March 31, 2020, which were repaid during the three months ended June 30, 2020. Non-cash amortization of debt issuance costs, which is included in interest expense, was $1.0 million and $1.1 million for the nine months ended September 30, 2020 and 2019, respectively.

Other income, net

For the nine months ended September 30, 2020 and 2019, other income, net, which was derived primarily from state and local tax incentive programs, interest income and service charges assessed on past due accounts receivable, was $9.1 million and $10.2 million, respectively. This decrease was primarily due to a decrease in interest income.

Income tax

For the nine months ended September 30, 2020, income tax expense was $34.4 million compared to $29.7 million for the nine months ended September 30, 2019. The effective tax rate for the nine months ended September 30, 2020 was 23.8%, which varied from the federal statutory rate of 21% primarily due to state income taxes and nondeductible Merger-related costs. The effective tax rate for the nine months ended September 30, 2019 was 24.9%, which varied from the federal statutory rate of 21% primarily due to state income taxes and an out of period adjustment.

Liquidity and Capital Resources

Our primary capital requirements are to fund working capital needs and operating expenses, meet required interest and principal payments, fund capital expenditures and support our acquisition activity. During 2020 and 2019, our capital resources have primarily consisted of cash and cash equivalents generated through operating cash flows and borrowings under our Revolver.

In light of the uncertainty around COVID-19, including its impact on financial and capital markets, as a precautionary measure and to increase cash on hand and financial flexibility, we borrowed $144.0 million under our revolving credit facility during the three months ended March 31, 2020. We repaid the $144.0 million borrowing during the three months ended June 30, 2020. Our liquidity at September 30, 2020 was $648.5 million, which included $286.2 million in cash and cash equivalent and $362.3 million of unused borrowing capacity under our Revolver.

We have taken steps to preserve our liquidity in response to the COVID-19 pandemic, including, but not limited to, postponing certain growth-related capital projects and share repurchases, reducing operating expenses, reducing associate staffing levels,

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reducing or eliminating certain other costs and actively managing working capital. We have utilized, and plan to continue utilizing, certain benefits of the CARES Act to preserve our liquidity, including the temporary suspension of certain payment requirements for the employer portion of Social Security taxes. We estimate that this will defer approximately $23 million of payments that would have been paid during 2020, such that under the CARES Act, approximately $11.5 million will now be paid on December 31, 2021 and the remaining $11.5 million will be paid on December 31, 2022. We currently believe that these measures and any others we may determine to take in the future to preserve our cash flows from operations, combined with our current cash levels and available borrowing capacity, will provide sufficient liquidity to fund debt service requirements and support our ongoing operations, lease obligations and working capital for at least the next 12 months. However, due to the unpredictable and unprecedented nature of the pandemic and its impacts, it is impractical to identify all potential risks to or estimate the ultimate adverse impact on our liquidity needs and cash flows in the next 12 months and beyond.

In November 2018, the Company’s board of directors authorized a $75.0 million share repurchase program. Repurchases may be made at management’s discretion from time to time on the open market, subject to applicable laws, or through privately negotiated transactions. The repurchase program will expire on November 20, 2020 or may be suspended or discontinued at any time. During the nine months ended September 30, 2020, the Company repurchased 0.1 million shares at a weighted average price of $16.20 per share for a total cost of $1.4 million. Under the Merger Agreement described in “-Merger Agreement with Builders FirstSource, Inc.” above, the Company has generally agreed not to make any share repurchases prior to the Effective Time.

Historical Cash Flow Information

Net current assets

Net current assets (current assets less current liabilities) were $676.8 million and $538.3 million as of September 30, 2020 and December 31, 2019, respectively, as summarized in the following table:

(in thousands)	September 30, 2020		December 31, 2019
Cash and cash equivalents	$	286,221	$	165,496
Accounts receivable, net of allowances	393,735		325,741
Inventories	413,031		331,969
Other current assets	112,661		106,447
Accounts payable, accrued expenses and other current liabilities	(498,053)		(359,650)
Current portion of long-term debt and finance lease obligations	(3,210)		(5,577)
Current portion of operating lease liabilities	(27,635)		(26,147)
Total net current assets	$	676,750	$	538,279

Accounts receivable, net of allowances, increased $68.0 million from December 31, 2019 to September 30, 2020 primarily due to seasonal increases in sales and higher selling prices due to commodity price inflation. Days sales outstanding (measured against net sales in the current fiscal quarter of each period) were 33 days at December 31, 2019 and September 30, 2020.

Inventories increased $81.1 million from December 31, 2019 to September 30, 2020 primarily due to commodity price inflation. Inventory days on hand (measured against cost of sales in the current fiscal quarter of each period) were 46 days and 45 days at December 31, 2019 and September 30, 2020, respectively.

Accounts payable, accrued expenses and other current liabilities increased $138.4 million from December 31, 2019 to September 30, 2020 primarily due to an increase in accounts payable related to increased inventory purchases in connection with commodity price inflation and seasonally higher sales volumes.

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Cash flows from operating activities

Net cash provided by operating activities was $207.2 million and $198.4 million for the nine months ended September 30, 2020 and 2019, respectively, as summarized in the following table:

	Nine Months Ended September 30,
(in thousands)	2020		2019
Net income	$	110,546	$	89,646
Non-cash expenses	74,686		63,735
Change in deferred income taxes	7,418		4,857
Change in working capital and other assets and liabilities	14,544		40,179
Net cash provided by operating activities	$	207,194	$	198,417

Net cash provided by operating activities increased by $8.8 million for the nine months ended September 30, 2020 compared to the nine months ended September 30, 2019. This increase was primarily related to the steps taken to preserve liquidity discussed above, including, but not limited to, reducing operating expenses, reducing associate staffing levels and reducing or eliminating certain other costs, as well as an increase of $15.1 million due to the temporary suspension of certain payment requirements for the employer portion of Social Security taxes under the CARES Act. These increases were partially offset by an increase in cash paid for inventory due to commodity price inflation.

Cash flows from investing activities

Net cash used in investing activities was $69.8 million and $148.8 million for the nine months ended September 30, 2020 and 2019, respectively, as summarized in the following table:

	Nine Months Ended September 30,
(in thousands)	2020		2019
Purchases of property, equipment and real estate	$	(71,037)	$	(67,582)
Proceeds from sale of property, equipment and real estate	1,258		4,444
Purchases of businesses, net of cash acquired	—		(85,780)
Insurance proceeds	—		107
Net cash used in investing activities	$	(69,779)	$	(148,811)

Cash used for the purchase of property, equipment and real estate for the nine months ended September 30, 2020 and 2019 resulted primarily from the purchase of vehicles and equipment to support increased sales volume and replace aged assets, and facility, technology and automation investments to support our operations. Proceeds from the sale of property, equipment and real estate during the nine months ended September 30, 2019 related primarily to the sale of real estate of $3.6 million.

Purchases of businesses, net of cash acquired, for the nine months ended September 30, 2019, related to the cash paid at closing for the Barefoot, Locust Lumber, Kingston Lumber, Heritage One and Colorado Fasteners acquisitions.

During the nine months ended September 30, 2019, the Company received insurance proceeds related to a fire at one of the Company’s facilities during 2015.

Cash flows from financing activities

Net cash used in financing activities was $16.7 million and $27.1 million for the nine months ended September 30, 2020 and 2019, respectively, as summarized in the following table:

	Nine Months Ended September 30,
(in thousands)	2020		2019
Net proceeds from Revolver	$	—	$	—
Repurchases of common stock under share repurchase program	(1,416)		(16,446)
Payments on finance lease obligations	(4,613)		(5,094)
Other financing activities, net	(10,661)		(5,530)
Net cash used in financing activities	$	(16,690)	$	(27,070)

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In light of the uncertainty around COVID-19, including its impact on financial and capital markets, as a precautionary measure and to increase cash on hand and financial flexibility, we borrowed $144.0 million under our revolving credit facility during the three months ended March 31, 2020. We repaid the $144.0 million borrowing during the three months ended June 30, 2020.

Under the $75.0 million share repurchase program authorized by the Company’s board of directors, the Company repurchased 0.1 million shares at a weighted average price of $16.20 during the nine months ended September 30, 2020 and 1.0 million shares at a weighted average price of $17.11 per share during nine months ended September 30, 2019.

Other financing activities, net includes proceeds from the exercise of stock options, net activity related to secured borrowings and repurchases of common stock in connection with the vesting of restricted stock unit awards. For the nine months ended September 30, 2020, other financing activities, net also included the release of the holdbacks for certain of the 2019 Acquisitions, net of a post-closing adjustment received. For the nine months ended September 30, 2019, other financing activities, net also included the release of the holdbacks for the W.E. Shone Co. and Barefoot acquisitions, the payment of the earnout provision for the Code Plus Components, LLC acquisition and payments of debt issuance costs related to an amendment to our Credit Agreement.

Capital expenditures

Capital expenditures vary depending on prevailing business factors, including current and anticipated market conditions. We have taken steps to preserve our liquidity in response to the COVID-19 pandemic, including, among others, postponing certain growth-related capital projects. We will continue to invest in safety and productivity-related capital expenditures. We expect our 2020 capital expenditures, net of proceeds from the sale of property, equipment and real estate, to be approximately $80.0 million to $90.0 million. For the nine months ended September 30, 2020, capital expenditures, net of proceeds from the sale of property, equipment and real estate, were $69.8 million, which were primarily related to vehicles and equipment to replace aged assets and support increased sales volume, and facility, technology and automation investments to support our operations.

Senior secured notes

On September 15, 2016, the Company issued $350.0 million of Senior Notes. The Senior Notes mature on October 1, 2024 and are secured by a first priority lien on certain assets of the Company and a second priority lien on the collateral that secures the Credit Agreement, which collectively approximates substantially all assets of the Company. The interest rate is fixed at 5.5% and is payable semiannually on April 1 and October 1. The indenture governing the Senior Notes (the “Indenture”) contains customary nonfinancial covenants, including restrictions on new indebtedness, issuance of liens and guarantees, investments, distributions to equity holders, asset sales and affiliate transactions. The Senior Notes were issued by BMC East, LLC, a 100% owned subsidiary of the Company, and are guaranteed by the Company and the other subsidiaries that guarantee the Credit Agreement. Each of the subsidiary guarantors is 100% owned, directly or indirectly, by the Company, and all guarantees are full and unconditional and joint and several. We were in compliance with all covenants under the Indenture as of September 30, 2020.

Revolving credit agreement

On December 1, 2015, the Company entered into the Original Credit Agreement with Wells Fargo Capital Finance, as administrative agent, and certain other lenders. The Credit Agreement, which includes the Revolver, has an aggregate commitment of $425.0 million and a letters of credit sublimit of $100.0 million. The Revolver matures at the earlier of (i) May 31, 2024 and (ii) if the Senior Notes are refinanced or repaid, the date that is 91 days prior to the new maturity date of the replacement notes or other indebtedness that replaced or refinanced the Senior Notes. The Revolver is subject to an asset-based borrowing formula on eligible accounts receivable, credit card receivables and inventory, in each case reduced by certain reserves.

Borrowings under the Revolver bear interest, at our option, at either the Base Rate (which means the higher of (i) the Federal Funds Rate plus 0.5%, (ii) the LIBOR rate plus 1.0% or (iii) the prime rate) plus a Base Rate Margin (which ranges from 0.25% to 0.50% based on Revolver availability) or LIBOR plus a LIBOR Rate Margin (which ranges from 1.25% to 1.50% based on Revolver availability). The Credit Agreement includes customary provisions for implementation of replacement rates for rate-based and LIBOR-based loans upon any phase-out of LIBOR. The fee on any outstanding letters of credit issued under the Revolver ranges from 0.75% to 1.25%, depending on whether the letters of credit are fully cash collateralized. The fee on the unused portion of the Revolver is 0.25%.

The Credit Agreement contains customary nonfinancial covenants, including restrictions on new indebtedness, issuance of liens, investments, distributions to equity holders, asset sales, affiliate transactions, merger transactions and entering into unrelated businesses. The Credit Agreement includes a financial covenant that requires us to maintain a minimum Fixed Charge

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Coverage Ratio of 1.00:1:00, as defined therein. However, the covenant is only applicable if excess availability under the Credit Agreement is less than or equal to the greater of (i) $37.7 million and (ii) 10% of the line cap, and remains in effect until excess availability has been greater than the greater of (i) $37.7 million and (ii) 10% of the line cap for 30 consecutive days. While there can be no assurances, based upon our forecast, we do not expect the financial covenant to become applicable during the year ending December 31, 2020. We were in compliance with all covenants under the Credit Agreement as of September 30, 2020.

We had no outstanding borrowings with net availability of $362.3 million as of September 30, 2020. We had $61.6 million in letters of credit outstanding under the Credit Agreement as of September 30, 2020.

Contractual Obligations and Commercial Commitments

The Company was obligated under certain purchase commitments totaling approximately $11.7 million at September 30, 2020 that are non-cancellable, enforceable and legally binding on us. These purchase commitments consist primarily of obligations for vehicle purchases and facility improvements.

Off-Balance Sheet Arrangements

At September 30, 2020 and December 31, 2019, other than letters of credit issued under the Credit Agreement, we had no material off-balance sheet arrangements with unconsolidated entities.

Recently Issued Accounting Pronouncements

See Note 2 to the unaudited condensed consolidated financial statements included in Item 1 of this Quarterly Report on Form 10-Q for a summary of recently issued accounting pronouncements.

Critical Accounting Policies

There have been no material changes to the critical accounting policies as disclosed in the Company’s 2019 Annual Report on Form 10-K.

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ITEM 3     QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There have been no material changes to the market risks as disclosed in the Company’s 2019 Annual Report on Form 10-K.

ITEM 4    CONTROLS AND PROCEDURES

Disclosure controls and procedures

Our management is responsible for establishing and maintaining disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These disclosure controls and procedures are designed to provide reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to provide reasonable assurance that information required to be disclosed by an issuer in the reports that it files or submits under the Exchange Act is accumulated and communicated to the issuer’s management, including its principal executive officer and principal financial officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

We have evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this Quarterly Report on Form 10-Q, with the participation of our Chief Executive Officer and Chief Financial Officer, as well as other key members of our management. Based on this evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of September 30, 2020.

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.

Changes in internal control over financial reporting

There was no change in our internal control over financial reporting during the three months ended September 30, 2020 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

ITEM 1    LEGAL PROCEEDINGS

We are currently involved in various claims, legal proceedings and lawsuits incidental to the conduct of our business in the ordinary course. We are a defendant in various pending lawsuits, legal proceedings and claims arising from assertions of alleged product liability, warranty, casualty, construction defect, contract, tort, employment and other claims. We carry insurance in such amounts in excess of our self-insurance or deductibles as we believe to be reasonable under the circumstances although insurance may or may not cover any or all of our liabilities in respect of claims and lawsuits. We do not currently believe that the ultimate resolution of these matters will have a material adverse effect on our consolidated financial position, cash flows or operating results.

ITEM 1A    RISK FACTORS

Except as set forth below with respect to certain matters related to the Merger and the COVID-19 pandemic, there have been no material changes to our risk factors from the risk factors disclosed in our 2019 Annual Report on Form 10-K.

The potential effects of COVID-19 could also impact or amplify many of the risk factors included in our 2019 Annual Report on Form 10-K, including, but not limited to, the state of the homebuilding industry, fluctuation of commodity prices and prices of our products, the impact of potential changes in our customer or product sales mix, our concentration of business, the potential loss of significant customers, our ability to maintain profitability and positive cash flows, product shortages, loss of key suppliers, the impact of long-term noncancellable leases, the credit risk from our customers, the impact of health and safety laws and regulations and cybersecurity risks. However, given the unpredictable and unprecedented nature of the evolving health, economic, social and governmental environments, the potential impact that the pandemic could have on these and other risk factors remain uncertain.

The risks described in our 2019 Annual Report on Form 10-K, in addition to the other information set forth in this Quarterly Report on Form 10-Q, are not the only risks facing our Company. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially adversely affect our business, financial condition and/or operating results.

Risks Relating to the Merger

Satisfying conditions to the completion of the Merger may prevent or delay completion of the Merger.

The Merger is subject to a number of conditions to completion as specified in the Merger Agreement. These conditions include, among others, (i) receipt of required stockholder approvals of both companies; (ii) approval for listing on Nasdaq, subject to official notice of issuance, of the shares of BLDR Common Stock to be issued as consideration in the Merger; (iii) the absence of any law or order that enjoins, prevents, makes illegal or prohibits the completion of the Merger or the Stock Issuance; (iv) expiration or termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the “HSR Act”); and (v) the satisfaction of other customary closing conditions, including with respect to the accuracy representations and warranties, the performance in all material respects of specified obligations and the absence of a material adverse effect. No assurance can be given that the required stockholder, governmental and regulatory consents and approvals will be obtained or that the required conditions to the completion of the Merger will be satisfied, and, if all required consents and approvals are obtained and the conditions are satisfied, no assurance can be given as to the terms, conditions and timing of the consents and approvals. Any delay in completing the Merger could have a material adverse effect on our business, financial condition, operating results and cash flows.

The parties must obtain certain regulatory approvals and clearances to complete the Merger, which, if delayed, not granted or granted with unacceptable conditions, could prevent, substantially delay or impair completion of the Merger or result in additional expenditures of money and resources.

Under the provisions of the HSR Act, the Merger may not be completed until the expiration of a statutory waiting period, or the early termination of that waiting period, following the parties’ filing of their respective notification and report forms. On September 10, 2020, Builders FirstSource and the Company each filed an HSR notification form with the U.S. Federal Trade Commission (the “FTC”), and the U.S. Department of Justice (the “DOJ”). On September 17, 2020, the DOJ received clearance to review the Merger. As part of the parties’ continuing cooperation with the regulatory review, in consultation with BMC, Builders FirstSource voluntarily withdrew its HSR Notification on October 13, 2020, and re-filed its HSR Notification on October 15, 2020 (the “Refiled Notification”). The waiting period under the HSR Act with respect to the Refiled Notification currently is scheduled to expire on November 16, 2020, unless extended by the issuance of a request for additional information and documentary materials or terminated earlier. The DOJ could also seek to enjoin completion of the Merger or impose

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conditions on its approval such as requiring the divestiture by Builders FirstSource or us of assets, businesses or product lines. If the statutory waiting period is extended, the completion of the Merger could be substantially delayed. A delay could, among other things, increase the chance that an event occurs that constitutes a material adverse effect with respect to either party or could otherwise cause the failure of a condition to the completion of the Merger or otherwise adversely impact our business.

Under the Merger Agreement, the parties generally must use their respective reasonable best efforts to obtain all regulatory approvals required to complete the Merger as soon as reasonably practicable. We and Builders FirstSource have agreed to divest, license, hold separate, or otherwise dispose of, or allow a third party to utilize, any portion of our or its business, assets or contracts or take any other action that may be required or requested by any governmental authority in connection with obtaining the consents, authorizations, orders, or approvals if reasonably necessary, proper or advisable so as to permit the completion of the Merger. However, neither we nor Builders FirstSource is required to divest or otherwise dispose of any portion of our or its business, assets or contracts or take any other action if such action (individually or in the aggregate) would reasonably be expected to have an adverse effect that is material to Builders FirstSource and its subsidiaries (including the Company and its subsidiaries), taken as a whole (after giving effect to the Merger and the other transactions contemplated by the Merger Agreement).

The Merger, including uncertainty regarding the Merger, may cause customers, suppliers or strategic partners to delay or defer decisions regarding our business, and may adversely affect our ability to effectively manage the business.

The Merger will happen only if the stated conditions are satisfied, including the receipt of the requisite stockholder approvals and the receipt of regulatory approvals, among other conditions. Many of the conditions are outside the parties’ control, and both parties also have certain rights to terminate the Merger Agreement. Accordingly, there may be uncertainty regarding the completion of the Merger. This uncertainty may cause our customers, suppliers, vendors, strategic partners or others that deal with us to delay or defer entering into contracts or make other decisions concerning us, or to seek to change or cancel existing business relationships with us, which could negatively affect our business. Any delay or deferral of those decisions or changes in existing agreements or relationships could have a material adverse effect on our business, financial condition, operating results and cash flows.

Until the completion of the Merger or the termination of the Merger Agreement in accordance with its terms, we are prohibited from entering into certain transactions and taking certain actions that might otherwise be beneficial to us and our stockholders.

The Merger Agreement restricts us from taking specified actions without Builders FirstSource’s consent and requires that we conduct our business in all material respects in the ordinary course of business, consistent with past practice, subject to certain exceptions related to COVID-19. These restrictions could impact our ability to pursue or make certain acquisitions, effect what we may consider appropriate changes to our business or organizational structure or otherwise pursue attractive business opportunities that may arise prior to the completion of the Merger, which could have the effect of, among other things, delaying or preventing these or other strategic actions. The effects of these restrictions and other adverse effects arising from the pendency of the Merger could be exacerbated by any delays in completion of the Merger or termination of the Merger Agreement, any of which could have a material adverse effect on our business, financial condition, operating results and cash flows.

The announcement and pendency of the Merger will divert significant management resources to complete the Merger, which could disrupt and otherwise have an adverse effect on our business and financial results.

The announcement and pendency of the Merger could disrupt our business. Specifically, current and prospective employees may experience uncertainty about their future roles with the combined company, which might adversely affect our ability to retain key managers and other employees. Additionally, management’s attention, which would otherwise have been devoted to the day-to-day operations, may be diverted toward the completion of the Merger. We have diverted significant management resources in an effort to complete the Merger and, as a result, if the Merger is not completed, we will have incurred significant costs, including the diversion of management resources, for which we will have received little or no benefit, which could have a material adverse effect on our business, financial condition, operating results and cash flows.

The Merger Agreement may be terminated in accordance with its terms and the Merger may not be completed.

Either we or Builders FirstSource may terminate the Merger Agreement under certain circumstances, including, among other reasons, if the Merger is not completed by the outside date of May 26, 2021, which may be extended to August 26, 2021, and on such date, all of the conditions to the completion of the Merger (other than certain specified exceptions, including with respect to approval under the HSR Act), have been satisfied or duly waived. In addition, if the Merger Agreement is terminated under certain circumstances, we may be required to pay Builders FirstSource a termination fee of $66.0 million, including

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circumstances in which our board of directors effects a change of its recommendation regarding the Merger or we enter into an agreement with respect to a superior acquisition proposal following the termination of the Merger Agreement. See “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Merger Agreement with Builders FirstSource, Inc.” Any termination of the Merger Agreement could have a material adverse effect on our business, financial condition, operating results and cash flows.

The termination of the Merger Agreement could negatively impact us.

If the Merger is not completed for any reason, including as a result of the failure to receive the requisite stockholder approvals, our ongoing business may be adversely affected and would be subject to a number of risks, including the following:

•negative reactions from the financial markets, including negative impacts on our stock price;

•negative reactions from our suppliers, customers, regulators and employees;

•the requirement to pay our costs relating to the Merger, such as investment banking, legal, financing and accounting costs and associated fees and expenses, whether or not the Merger is completed; and

•litigation related to any failure to complete the Merger or related to any enforcement proceeding commenced against us to perform their respective obligations under the Merger Agreement.

Failure to complete the Merger could have a material adverse effect on our business, financial condition, operating results and cash flows.

The Merger Agreement contains provisions that could discourage a potential competing acquirer that might be willing to pay more to acquire or merge with us.

The Merger Agreement contains non-solicitation provisions that restrict our ability to, among other things:

•solicit, initiate, knowingly facilitate or knowingly encourage (including by way of furnishing information), or take any other action designed to lead to, the submission by any person of an acquisition proposal;

•engage in, continue, knowingly facilitate, knowingly encourage or otherwise participate in any discussions or negotiations related to any acquisition proposal or provide any information to any person in connection with, or related to, any acquisition proposal;

•approve, endorse or recommend any acquisition proposal; or

•enter into any contract (including any letter of intent, agreement, agreement in principle or memorandum of understanding) or similar document or commitment related to an acquisition proposal.

Furthermore, there are only limited exceptions to the requirement under the Merger Agreement that our board of directors not change, withhold, withdraw, qualify, amend, or modify (or publicly propose to change, withhold, withdraw, qualify, amend, or modify) its recommendation. Although our board of directors is permitted to effect a change of recommendation, after complying with certain procedures set forth in the Merger Agreement, including submitting the Merger Agreement for stockholder approval, doing so would entitle Builders FirstSource to terminate the Merger Agreement and collect a $66.0 million termination fee from us. These provisions could discourage a potential competing acquirer from considering or proposing an acquisition or merger, even if it were prepared to pay consideration with a higher value than that implied by the Exchange Ratio, or they could result in a potential competing acquirer proposing to pay a lower per share price than it might otherwise have proposed to pay because of the added expense of the termination fee.

Lawsuits may be filed challenging the Merger. An adverse ruling in any such lawsuit may prevent the Merger from being completed.

Governmental authorities or other third parties with appropriate standing may file litigation challenging the Merger and seeking an order enjoining or otherwise delaying or prohibiting the completion of the Merger. If any such litigation is successful, then such order may prevent the Merger from being completed, or from being completed within the expected time frame, any of which could have a material adverse effect on our business, financial condition, operating results and cash flows.

Risks Relating to COVID-19

The COVID-19 pandemic could have a material adverse effect on our business, financial condition, operating results and cash flows.

In December 2019, a novel strain of coronavirus (COVID-19) surfaced in Wuhan, China. Since then, the virus has spread globally, including to the United States, and the World Health Organization has declared the outbreak a pandemic and the U.S.

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Secretary of Health and Human Services has declared a public health emergency. Public health organizations and international, federal, state and local governments have implemented measures to combat the spread of COVID-19, including restrictions on movement such as quarantines, “stay-at-home” orders and social distancing ordinances and restricting or prohibiting outright some or all forms of commercial and business activity. Such measures, or others that may be implemented in the future, although temporary in nature, may become more restrictive or continue indefinitely.

Our business has been adversely affected, and may be materially adversely affected, by the COVID-19 pandemic and the global impact. The Company’s, its customers’ and its suppliers’ businesses have generally been classified as “essential business” in most of the jurisdictions in which the Company operates, permitting the Company and its customers and suppliers to continue operations in most of the Company’s markets. However, there can be no assurance that our business or our customers’ and suppliers’ businesses will continue to be classified as “essential” in the future, or that we or they will not voluntarily limit or cease operations in one or more markets if we or they believe it is in our or their best interests. For example, in accordance with preventive measures we implemented, we significantly reduced operations during the second quarter of 2020 in the State of Washington, which represented approximately 5% of the Company’s net sales for the year ended December 31, 2019. We also temporarily reduced or otherwise limited operations in other jurisdictions, including Pennsylvania and portions of northern California that implemented restrictions on construction activity. Although these jurisdictions reopened in May and June 2020, we may need to make further reductions in operations in the future. Should there be an outbreak of COVID-19 among the Company’s employees at one or more of the Company’s facilities, we may need to significantly reduce or cease operations in response.

According to the U.S. Census Bureau, single-family housing starts in the South and West regions of the United States, which are our primary operating regions, increased approximately 17.3% for the three months ended September 30, 2020 compared to the same period in the prior year. However, the COVID-19 pandemic may have a material adverse impact in future periods on our customers and the homebuilding industry in general, as it may adversely affect, among other factors, employment levels, consumer spending and consumer confidence, which would decrease demand for homes and impact the creditworthiness of our customers.

To the extent our suppliers are negatively impacted by the COVID-19 pandemic, there could be disruptions in our supply chain, which could, among other impacts, limit our ability to deliver our products and services to our customers in a timely and cost-effective manner and meet recent increases in customer demand within the homebuilding industry, thereby adversely affecting our sales and profitability. For example, certain of our suppliers across our markets have either reduced or ceased production in some or all of their facilities in response to the COVID-19 outbreak. Recently, due in part to the continued impacts of COVID-19 on certain suppliers, the supply of certain products, including interior doors, lumber, structural panels, vinyl windows and EWP, has been significantly curtailed, increasing lead times. This, along with any further reductions in their production levels, may limit the supply or extend lead times of certain materials or to certain markets, which could, among other things, increase the cost of materials or limit our ability to procure the materials we need to fulfill customer demand. Additionally, we enter into arrangements with many of our suppliers providing for supplier rebates upon achievement of specified volume purchasing levels. Should we not achieve specified volume purchasing levels as a result of the impacts of COVID-19 and as such, reduce our supplier rebate income, our margins and profitability would be negatively impacted.

Similarly, due to the impact of the COVID-19 pandemic on lumber production of suppliers and the commodity markets in general, there was significant volatility in commodity prices during the three and nine months ended September 30, 2020. The average composite framing lumber prices and average composite structural panel prices began decreasing in the second half of March 2020 and continued to decrease until May 2020, when prices began to increase rapidly and continued to increase until October 2020. If we are unable to pass along these price increases to our customers, this could have a material adverse effect on our business, financial condition, operating results and cash flows. Excessive spikes in the market prices of certain building products, such as lumber, can also put negative pressure on our operating cash flows by requiring us to invest more in inventory.

Our management is focused on mitigating the impact of COVID-19 on our business and the risk to our employees. This focus has diverted management’s attention away from normal business operations. Additionally, we have taken a number of precautionary measures intended to mitigate the impact of COVID-19 on our business and the risk to our employees, including implementing detailed cleaning and disinfecting processes at our facilities, adhering to social distancing protocols, suspending non-essential air travel and encouraging employees to work from home when possible, which could adversely affect our business. While these measures and others we may take are temporary, they may continue until the pandemic is contained and restrictions on movement or commercial and business activity and related orders or ordinances are sufficiently modified or lifted, and could amplify existing risks or introduce new risks that could adversely affect our business, including, but not limited to, risks related to internal controls and cybersecurity and others we identify in our 2019 Annual Report on Form 10-K.

33

The pandemic has adversely affected many industries as well as the economies and financial markets of many countries, including the United States, causing a significant deceleration of economic activity. This slowdown has reduced production, decreased demand for a broad variety of goods and services, diminished trade levels, and led to widespread corporate downsizing, causing a sharp increase in unemployment. We have also seen significant disruption of and extreme volatility in the global capital markets, which could increase the cost of, or entirely restrict access to, capital. The impact of this pandemic on the U.S. and world economies is uncertain and, until the pandemic is contained, these adverse impacts could worsen, impacting all segments of the global economy, and result in a significant recession or worse.

Considerable uncertainty still surrounds the COVID-19 virus and its potential effects, and the extent of and effectiveness of any responses taken on local, state, national and global levels. To date, no fully effective vaccines or treatments have been developed and effective vaccines or treatments may not be discovered soon enough to protect against a worsening of the pandemic or to prevent COVID-19 from becoming endemic. While we expect the pandemic and related events will have a negative effect on us, the unpredictable and unprecedented nature of the current situation makes it impractical to identify all potential risks or estimate the full extent and scope of the impact on our business and industry, as well as national, regional and global markets and economies. Accordingly, our ability to conduct our business in the manner previously or currently expected could be materially and negatively affected, and any of the foregoing risks and uncertainties as well as those that have not yet manifested themselves or been identified could have a material adverse impact on our business, financial condition, operating results and cash flows.

ITEM 2    UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Issuer Purchases of Equity Securities

During November 2018, the Company’s board of directors authorized a $75.0 million share repurchase program. Repurchases may be made at management’s discretion from time to time on the open market, subject to applicable laws, or through privately negotiated transactions. The repurchase program will expire on November 20, 2020 or may be suspended or discontinued at any time. Under the merger agreement described in “-Merger Agreement with Builders FirstSource, Inc.” above, the Company has generally agreed not to make any share repurchases prior to the Effective Time. There were no share repurchases during the three months ended September 30, 2020. As of September 30, 2020, the Company had approximately $54.2 million of capacity remaining under the current share repurchase authorization.

ITEM 3    DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4    MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5    OTHER INFORMATION

None.

34

ITEM 6    EXHIBITS

EXHIBIT INDEX

Exhibit No.	Description
2.1*	Agreement and Plan of Merger, dated August 26, 2020, by and among BMC Stock Holdings, Inc., Builders FirstSource, Inc., and Boston Merger Sub I Inc. (incorporated by reference to Exhibit 2.1 to the BMC Stock Holdings, Inc. Current Report on Form 8-K filed with the Commission on August 27, 2020 in Commission File No. 001-36050)
10.1#	Amended and Restated Employment Agreement, dated as of August 26, 2020, between David E. Flitman, Builders FirstSource, Inc., and BMC Stock Holdings, Inc. (incorporated by reference to Exhibit 10.1 to the BMC Stock Holdings, Inc. Current Report on Form 8-K filed with the Commission on August 27, 2020 in Commission File No. 001-36050)
31.1	Certification by David E. Flitman, President and Chief Executive Officer, pursuant to Exchange Act Rule 13a-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification by James F. Major, Jr., Executive Vice President, Chief Financial Officer and Treasurer, pursuant to Exchange Act Rule 13a-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	Inline XBRL Taxonomy Extension Schema Document
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover Page Interactive Data File - The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2020 is formatted in Inline XBRL (included as Exhibit 101).

* Pursuant to Item 601(a)(5) of Regulation S-K promulgated under the Securities Act, the registrant has omitted the schedules to Exhibit 2.1. A copy of such schedules will be furnished supplementally to the Commission upon its request.

# Denotes management compensatory plan or arrangement.

35

SIGNATURE

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.

	BMC STOCK HOLDINGS, INC.
Date: November 3, 2020	By:	/s/ James F. Major, Jr.
		Executive Vice President, Chief Financial Officer and Treasurer
		(Principal financial and accounting officer and duly authorized officer)

36

EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, David E. Flitman, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of BMC Stock Holdings, 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 control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

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

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

5.    The registrant’s other certifying officer(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.

Date: November 3, 2020

/s/ David E. Flitman    

David E. Flitman

President and Chief Executive Officer

(principal executive officer)

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, James F. Major, Jr., certify that:

1.    I have reviewed this quarterly report on Form 10-Q of BMC Stock Holdings, 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 control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

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

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

5.    The registrant’s other certifying officer(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.

Date: November 3, 2020

/s/ James F. Major, Jr.    

James F. Major, Jr.

Executive Vice President, Chief Financial Officer and Treasurer

(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 BMC Stock Holdings, Inc. (the “Company”) on Form 10-Q for the quarter ended September 30, 2020, as filed with the Securities and Exchange Commission (the “Report”), I, David E. Flitman, Chief Executive Officer of the Company, certify pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

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

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

Date: November 3, 2020

/s/ David E. Flitman    

David E. Flitman

President and Chief Executive Officer

(principal executive officer)

A signed original of this written statement required by Section 906 has been provided to BMC Stock Holdings, Inc. and will be retained by BMC Stock Holdings, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

EXHIBIT 32.2

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 BMC Stock Holdings, Inc. (the “Company”) on Form 10-Q for the quarter ended September 30, 2020, as filed with the Securities and Exchange Commission (the “Report”), I, James F. Major, Jr., Executive Vice President, Chief Financial Officer and Treasurer of the Company, certify pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

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

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

Date: November 3, 2020

/s/ James F. Major, Jr.    

James F. Major, Jr.

Executive Vice President, Chief Financial Officer and Treasurer

(principal financial officer)

A signed original of this written statement required by Section 906 has been provided to BMC Stock Holdings, Inc. and will be retained by BMC Stock Holdings, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Cover - shares	9 Months Ended
	Sep. 30, 2020	Nov. 03, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	001-36050
Entity Registrant Name	BMC Stock Holdings, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-4687975
Entity Address, Address Line One	4800 Falls of Neuse Rd, Suite 400
Entity Address, City or Town	Raleigh,
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27609
City Area Code	919
Local Phone Number	431-1000
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	BMCH
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		67,279,993
Entity Central Index Key	0001574815
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Current Fiscal Year End Date	--12-31

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 286,221	$ 165,496
Accounts Receivable, after Allowance for Credit Loss, Current	393,735	325,741
Inventories	413,031	331,969
Contract assets	36,422	32,125
Income taxes receivable	0	7,504
Prepaid expenses and other current assets	76,239	66,818
Total current assets	1,205,648	929,653
Property and equipment, net of accumulated depreciation	366,444	345,466
Operating lease right-of-use assets	131,868	139,907
Customer relationship intangible assets, net of accumulated amortization	170,200	185,049
Other intangible assets, net of accumulated amortization	385	580
Goodwill	295,390	297,146
Other long-term assets	7,599	8,300
Total assets	2,177,534	1,906,101
Current liabilities
Accounts payable	300,075	189,644
Accrued expenses and other liabilities	116,285	117,825
Contract liabilities	44,980	31,094
Income taxes payable	10,395	0
Interest payable	9,572	4,759
Current portion: Long-term debt and finance lease obligations	3,210	5,577
Current portion: Operating lease liabilities	27,635	26,147
Current portion: Insurance reserves	16,746	16,328
Total current liabilities	528,898	391,374
Insurance reserves	43,287	43,536
Long-term debt	346,659	346,032
Long-term portion of finance lease obligations	4,689	6,959
Long-term portion of operating lease liabilities	113,572	120,832
Deferred income taxes	22,613	15,195
Other long-term liabilities	15,309	661
Total liabilities	1,075,027	924,589
Commitments and contingencies (Note 9)
Stockholders’ equity
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	690	683
Additional paid-in capital	702,045	687,255
Retained earnings	430,736	320,190
Treasury Stock, Value	(30,964)	(26,616)
Total stockholders’ equity	1,102,507	981,512
Total liabilities and stockholders’ equity	$ 2,177,534	$ 1,906,101

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable allowances	$ 9,671	$ 8,318
Stockholders' Equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000.0	50,000,000.0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	300,000,000.0	300,000,000.0
Common stock, shares issued (shares)	69,000,000.0	68,300,000
Common stock, shares outstanding (in shares)	67,200,000	66,800,000
Treasury stock (shares)	1,800,000	1,500,000

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net sales	$ 1,090,343	$ 964,249	$ 2,991,118	$ 2,736,029
Cost of sales	817,261	709,482	2,228,086	2,019,363
Gross profit	273,082	254,767	763,032	716,666
Selling, general and administrative expenses	195,143	190,579	557,010	546,116
Depreciation expense	11,767	10,501	34,990	30,117
Amortization expense	5,016	4,552	15,045	13,237
Asset Impairment Charges	0	115	2,255	644
Total operating expenses	211,926	205,747	609,300	590,114
Income from operations	61,156	49,020	153,732	126,552
Other income (expense)
Interest expense	(5,744)	(5,773)	(17,880)	(17,385)
Other income, net	3,289	3,540	9,128	10,159
Income before income taxes	58,701	46,787	144,980	119,326
Income tax expense	13,806	13,190	34,434	29,680
Net income	$ 44,895	$ 33,597	$ 110,546	$ 89,646
Weighted average common shares outstanding
Basic (in shares)	67,141	66,685	67,001	66,681
Diluted (in shares)	67,967	67,361	67,725	67,240
Net income per common share
Basic (in dollars per share)	$ 0.67	$ 0.50	$ 1.65	$ 1.34
Diluted (in dollars per share)	$ 0.66	$ 0.50	$ 1.63	$ 1.33

XML

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
Stockholders' equity beginning of period at Dec. 31, 2018	$ 874,659	$ 677	$ (8,458)	$ 672,095	$ 210,345
Common stock issued beginning of period (shares) at Dec. 31, 2018		67,708,000
Treasury stock beginning of period (shares) at Dec. 31, 2018			478,000
Stockholders' Equity [Abstract]
Exercise of stock options	132	$ 0		132
Exercise of stock options (shares)		8,000
Shares vested for long-term incentive plan	0	$ 3		(3)
Shares vested for long-term incentive plan (shares)		290,000
Repurchases of common stock under share repurchase program	(15,709)		$ (15,709)
Repurchases of common stock under share repurchase program (shares)			920,000
Repurchases of common stock equity related to equity award activity	(1,330)		$ (1,330)
Repurchases of common stock related to equity award activity (shares)			74,000
Stock compensation expense	2,915			2,915
Net income	20,350				20,350
Stockholders' equity end of period at Mar. 31, 2019	881,017	$ 680	$ (25,497)	675,139	230,695
Common stock issued end of period (shares) at Mar. 31, 2019		68,006,000
Treasury stock end of period (shares) at Mar. 31, 2019			1,472,000
Stockholders' equity beginning of period at Dec. 31, 2018	874,659	$ 677	$ (8,458)	672,095	210,345
Common stock issued beginning of period (shares) at Dec. 31, 2018		67,708,000
Treasury stock beginning of period (shares) at Dec. 31, 2018			478,000
Stockholders' Equity [Abstract]
Repurchases of common stock under share repurchase program	$ (16,400)
Repurchases of common stock under share repurchase program (shares)	1,000,000.0
Net income	$ 89,646
Stockholders' equity end of period at Sep. 30, 2019	957,581	$ 683	$ (26,553)	683,460	299,991
Common stock issued end of period (shares) at Sep. 30, 2019		68,266,000
Treasury stock end of period (shares) at Sep. 30, 2019			1,526,000
Stockholders' equity beginning of period at Mar. 31, 2019	881,017	$ 680	$ (25,497)	675,139	230,695
Common stock issued beginning of period (shares) at Mar. 31, 2019		68,006,000
Treasury stock beginning of period (shares) at Mar. 31, 2019			1,472,000
Stockholders' Equity [Abstract]
Exercise of stock options	529	$ 1		528
Exercise of stock options (shares)		76,000
Shares vested for long-term incentive plan	0	$ 1		(1)
Shares vested for long-term incentive plan (shares)		73,000
Repurchases of common stock under share repurchase program	(737)		$ (737)
Repurchases of common stock under share repurchase program (shares)			41,000
Repurchases of common stock equity related to equity award activity	(137)		$ (137)
Repurchases of common stock related to equity award activity (shares)			6,000
Stock compensation expense	3,248			3,248
Net income	35,699				35,699
Stockholders' equity end of period at Jun. 30, 2019	919,619	$ 682	$ (26,371)	678,914	266,394
Common stock issued end of period (shares) at Jun. 30, 2019		68,155,000
Treasury stock end of period (shares) at Jun. 30, 2019			1,519,000
Stockholders' Equity [Abstract]
Exercise of stock options	1,533	$ 1		1,532
Exercise of stock options (shares)		84,000
Shares vested for long-term incentive plan	$ 0	$ 0		0
Shares vested for long-term incentive plan (shares)		27,000
Repurchases of common stock under share repurchase program (shares)	0
Repurchases of common stock equity related to equity award activity	$ (182)		$ (182)
Repurchases of common stock related to equity award activity (shares)			7,000
Stock compensation expense	3,014			3,014
Net income	33,597				33,597
Stockholders' equity end of period at Sep. 30, 2019	957,581	$ 683	$ (26,553)	683,460	299,991
Common stock issued end of period (shares) at Sep. 30, 2019		68,266,000
Treasury stock end of period (shares) at Sep. 30, 2019			1,526,000
Stockholders' equity beginning of period at Dec. 31, 2019	$ 981,512	$ 683	$ (26,616)	687,255	320,190
Common stock issued beginning of period (shares) at Dec. 31, 2019	68,300,000	68,306,000
Treasury stock beginning of period (shares) at Dec. 31, 2019	1,500,000		1,528,000
Stockholders' Equity [Abstract]
Exercise of stock options	$ 206	$ 0		206
Exercise of stock options (shares)		13,000
Shares vested for long-term incentive plan	0	$ 4		(4)
Shares vested for long-term incentive plan (shares)		402,000
Repurchases of common stock under share repurchase program	(1,416)		$ (1,416)
Repurchases of common stock under share repurchase program (shares)			87,000
Repurchases of common stock equity related to equity award activity	(2,441)		$ (2,441)
Repurchases of common stock related to equity award activity (shares)			122,000
Stock compensation expense	3,170			3,170
Net income	22,029				22,029
Stockholders' equity end of period at Mar. 31, 2020	1,003,060	$ 687	$ (30,473)	690,627	342,219
Common stock issued end of period (shares) at Mar. 31, 2020		68,721,000
Treasury stock end of period (shares) at Mar. 31, 2020			1,737,000
Stockholders' equity beginning of period at Dec. 31, 2019	$ 981,512	$ 683	$ (26,616)	687,255	320,190
Common stock issued beginning of period (shares) at Dec. 31, 2019	68,300,000	68,306,000
Treasury stock beginning of period (shares) at Dec. 31, 2019	1,500,000		1,528,000
Stockholders' Equity [Abstract]
Repurchases of common stock under share repurchase program	$ (1,400)
Repurchases of common stock under share repurchase program (shares)	100,000
Net income	$ 110,546
Stockholders' equity end of period at Sep. 30, 2020	$ 1,102,507	$ 690	$ (30,964)	702,045	430,736
Common stock issued end of period (shares) at Sep. 30, 2020	69,000,000.0	69,028,000
Treasury stock end of period (shares) at Sep. 30, 2020	1,800,000		1,753,000
Stockholders' equity beginning of period at Mar. 31, 2020	$ 1,003,060	$ 687	$ (30,473)	690,627	342,219
Common stock issued beginning of period (shares) at Mar. 31, 2020		68,721,000
Treasury stock beginning of period (shares) at Mar. 31, 2020			1,737,000
Stockholders' Equity [Abstract]
Exercise of stock options	159	$ 0		159
Exercise of stock options (shares)		9,000
Shares vested for long-term incentive plan	0	$ 1		(1)
Shares vested for long-term incentive plan (shares)		75,000
Repurchases of common stock equity related to equity award activity	(105)		$ (105)
Repurchases of common stock related to equity award activity (shares)			6,000
Stock compensation expense	3,328			3,328
Net income	43,622				43,622
Stockholders' equity end of period at Jun. 30, 2020	1,050,064	$ 688	$ (30,578)	694,113	385,841
Common stock issued end of period (shares) at Jun. 30, 2020		68,805,000
Treasury stock end of period (shares) at Jun. 30, 2020			1,743,000
Stockholders' Equity [Abstract]
Exercise of stock options	3,322	$ 2		3,320
Exercise of stock options (shares)		196,000
Shares vested for long-term incentive plan	$ 0	$ 0		0
Shares vested for long-term incentive plan (shares)		27,000
Repurchases of common stock under share repurchase program (shares)	0
Repurchases of common stock equity related to equity award activity	$ (386)		$ (386)
Repurchases of common stock related to equity award activity (shares)			10,000
Stock compensation expense	4,612			4,612
Net income	44,895				44,895
Stockholders' equity end of period at Sep. 30, 2020	$ 1,102,507	$ 690	$ (30,964)	$ 702,045	$ 430,736
Common stock issued end of period (shares) at Sep. 30, 2020	69,000,000.0	69,028,000
Treasury stock end of period (shares) at Sep. 30, 2020	1,800,000		1,753,000

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net income	$ 110,546	$ 89,646
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	45,702	39,722
Amortization of intangible assets	15,045	13,237
Amortization of debt issuance costs	952	1,124
Deferred income taxes	7,418	4,857
Non-cash stock compensation expense	11,110	9,177
Gain on sale of property, equipment and real estate	(518)	(1,839)
Other non-cash adjustments	2,395	2,314
Change in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of allowances	(68,365)	(24,068)
Inventories	(81,004)	(494)
Accounts payable	121,405	68,456
Other assets and liabilities	42,508	(3,715)
Net cash provided by operating activities	207,194	198,417
Cash flows from investing activities
Purchases of businesses, net of cash acquired	0	(85,780)
Purchases of property, equipment and real estate	(71,037)	(67,582)
Proceeds from sale of property, equipment and real estate	1,258	4,444
Insurance proceeds	0	107
Net cash used in investing activities	(69,779)	(148,811)
Cash flows from financing activities
Proceeds from revolving credit facility	144,000	110,987
Repayments of proceeds from revolving credit facility	(144,000)	(110,987)
Repurchases of common stock under share repurchase program	(1,416)	(16,446)
Payments on finance lease obligations	(4,613)	(5,094)
Other financing activities, net	(10,661)	(5,530)
Net cash used in financing activities	(16,690)	(27,070)
Net increase in cash and cash equivalents	120,725	22,536
Cash and cash equivalents
Beginning of period	165,496	150,723
End of period	286,221	173,259
Supplemental disclosure of non-cash transactions
Accrued purchases of property and equipment	4,807	4,484
Acquisition-related holdback payments due at future date	3,462	4,527
Assets acquired under finance lease obligations	0	5,789
Right-of-use assets obtained in exchange for operating lease obligations	$ 13,636	$ 34,836

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Organization

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

Organization

These unaudited financial statements represent the financial statements of BMC Stock Holdings, Inc. and its subsidiaries. All references to “BMC” or the “Company” mean BMC Stock Holdings, Inc. and its subsidiaries.

The Company distributes lumber and building materials to new construction and repair and remodeling contractors. Additionally, the Company provides solution-based services to its customers, including component design, product specification and installation services.

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Basis of Presentation

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) that permit reduced disclosure for interim periods. The condensed consolidated balance sheet as of December 31, 2019 was derived from audited financial statements, but does not include all necessary disclosures required by accounting principles generally accepted in the United States of America (“GAAP”). The unaudited condensed consolidated financial statements include all accounts of the Company and, in the opinion of management, include all recurring adjustments and normal accruals necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the dates and periods presented. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 (“2019 Annual Report on Form 10-K”). Results for interim periods are not necessarily indicative of the results to be expected during the remainder of the current year or for any future period. All material intercompany accounts and transactions have been eliminated in consolidation.

Comprehensive income

Comprehensive income is equal to the net income for all periods presented.

Cash and cash equivalents

Cash equivalents are highly liquid investments that are readily convertible to known amounts of cash and have a maturity of three months or less from the time of purchase. As of September 30, 2020, the Company had no cash equivalents and as of December 31, 2019, the Company had cash equivalents of $4.4 million. Cash equivalents are valued at amortized cost, which approximates fair value due to the short-term maturity of these instruments, and were classified as Level 1 or Level 2 measurements in accordance with Accounting Standards Codification (“ASC”) 820, Fair Value Measurements and Disclosures (“ASC 820”).

Book overdrafts occur when purchases on corporate purchasing cards and checks written exceed available bank balances at a specific bank, despite there being cash at the Company’s other financial institutions. For accounting purposes, the Company reclassifies these book overdrafts to accounts payable on the consolidated balance sheets. Book overdrafts included in accounts payable were $19.5 million and $2.5 million at September 30, 2020 and December 31, 2019, respectively.

Reclassifications

Merger and integration costs of $0.9 million and $2.4 million for the three and nine months ended September 30, 2020, respectively, related to the integration of Building Materials Holding Corporation (“BMHC”) and Stock Building Supply Holdings, Inc. (“SBS”) as a result of the 2015 merger transaction, which were historically presented in merger and integration costs on the condensed consolidated statements of operations, have been reclassified and are presented in selling, general and administrative expenses on the condensed consolidated statements of operations.

Use of estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company evaluates these estimates and judgments on an ongoing basis and bases its estimates on historical experience, current conditions and various other assumptions that are believed to be reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies.

Certain accounting matters that generally require consideration of forecasted financial information were assessed in light of the impact from the COVID-19 pandemic as of September 30, 2020. The accounting matters assessed included, but were not limited to, the Company’s allowance for doubtful accounts, inventory reserves, supplier rebates, goodwill impairment, impairment of tangible and intangible long-lived assets, share-based compensation and valuation allowances for tax assets. While the assessments resulted in no material impacts to the Company’s condensed consolidated financial statements as of and for the three and nine months ended September 30, 2020, the Company believes the full impact of the COVID-19 pandemic remains uncertain and the Company will continue to assess if ongoing developments related to the pandemic may cause future material impacts to our consolidated financial statements.

Share repurchase program

Utilizing cash from operations, the Company repurchased no shares during the three months ended September 30, 2020, 0.1 million shares at a weighted average price of $16.20 per share for a total cost of $1.4 million during the nine months ended September 30, 2020, no shares during the three months ended September 30, 2019 and 1.0 million shares at a weighted average price of $17.11 per share for a total cost of $16.4 million during the nine months ended September 30, 2019. These repurchases were made under the Company’s $75.0 million share repurchase program authorized by the Company’s board of directors in November 2018. These repurchased shares are available for future issuance and are reflected as treasury stock, at cost, on the condensed consolidated balance sheets. As of September 30, 2020, the Company had approximately $54.2 million of capacity remaining under the current share repurchase authorization. Under the merger agreement with Builders FirstSource, Inc., a Delaware corporation (“Builders FirstSource”), described in Note 3, the Company has generally agreed not to make any share repurchases prior to the effective time of the merger.

Statement of cash flows

Proceeds from revolving credit facility and repayments of proceeds from revolving credit facility as presented on the condensed consolidated statements of cash flows include all cash activities and transactions between the Company and its associated lenders in relation to the revolving credit facility, excluding interest and fees, and for the nine months ended September 30, 2019, is specifically inclusive of operating cash receipts that were automatically applied to the revolving credit facility pursuant to a voluntary cash sweep arrangement. See Note 6 for further details on the Company’s revolving credit facility.

Recently adopted accounting pronouncements

In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, and issued subsequent amendments to the initial guidance to provide additional clarification on specific topics (“ASU 2016-13”). ASU 2016-13 amends the impairment model by requiring entities to use a forward-looking approach based on expected losses to estimate credit losses on certain types of financial instruments, including trade receivables. ASU 2016-13 became effective for the Company’s annual and interim periods beginning on January 1, 2020. Modified retrospective application is required, with certain exceptions. The adoption of the standard did not have a material impact on the Company’s consolidated financial statements.

In January 2017, the FASB issued Accounting Standards Update 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires computation of the implied fair value of a reporting unit’s goodwill. The amount of a goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 became effective for the Company’s annual goodwill impairment test and any interim tests during the Company’s annual and interim periods beginning on January 1, 2020. Prospective application is required. The adoption of the standard did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued Accounting Standards Update 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). ASU 2018-13 modifies the disclosure requirements on fair value measurements by removing, modifying and adding certain disclosure requirements in ASC 820. ASU 2018-13 became effective for the Company’s annual and interim periods beginning on January 1, 2020. Certain disclosures in ASU 2018-13 are required to be applied prospectively, while others require retrospective application. The adoption of the standard did not have a material impact on the Company’s consolidated financial statements.

Recently issued accounting pronouncements not yet adopted

In December 2019, the FASB issued Accounting Standards Update 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”). ASU 2019-12 removes certain exceptions to the general principles in ASC 740 and clarifies and amends certain guidance to promote consistent application. ASU 2019-12 is effective for the Company's annual and interim periods beginning on January 1, 2021, with early adoption permitted. Depending on the amendment, adoption may be applied on a retrospective, modified retrospective or prospective basis. The adoption of the standard is not expected to have a material impact on the Company’s consolidated financial statements.

In March 2020, the FASB issued Accounting Standards Update 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by the expected transition away from reference rates that are expected to be discontinued, such as LIBOR. ASU 2020-04 was effective upon issuance. The Company may elect to apply the guidance prospectively through December 31, 2022. The Company is evaluating the impact of the standard on its consolidated financial statements.

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Merger Agreement with Builders FirstSource, Inc.

9 Months Ended

Sep. 30, 2020

Business Combinations [Abstract]

Merger Agreement with Builders FirstSource, Inc.

Merger Agreement with Builders FirstSource, Inc.

On August 26, 2020, the Company, Builders FirstSource and Boston Merger Sub I Inc., a Delaware corporation and a direct wholly owned subsidiary of Builders FirstSource (“Merger Sub”), entered into an Agreement and Plan of Merger (the “Merger Agreement”), pursuant to which the Company and Builders FirstSource will combine in an all-stock merger transaction. Upon the terms and subject to the conditions set forth in the Merger Agreement, at the effective time of the Merger (the “Effective Time”), Merger Sub will merge with and into the Company, with the Company continuing as the surviving corporation and becoming a wholly owned subsidiary of Builders FirstSource (the “Merger”), with Builders FirstSource identified as the accounting acquirer.

Under the terms of the Merger Agreement, which has been unanimously approved by the board of directors of each company, at the Effective Time, each issued and outstanding share of the Company’s common stock, par value $0.01 per share (the “BMC Common Stock”), will automatically be converted into the right to receive 1.3125 shares (the “Exchange Ratio”) of common stock, par value $0.01 per share, of Builders FirstSource (the “BLDR Common Stock”). No fractional shares of BLDR Common Stock will be issued in the Merger, and holders of shares of BMC Common Stock will receive cash in lieu of any such fractional shares. Upon consummation of the Merger, Builders FirstSource’s stockholders will own approximately 57% and the Company’s stockholders will own approximately 43% of the combined company.

Each outstanding BMC stock option held by a current employee or service-provider will become, at the Effective Time, an option to purchase shares of BLDR Common Stock, with the number of shares and the exercise price adjusted by the Exchange Ratio. Each outstanding BMC stock option held by any former BMC employee or service-provider will be converted at the Effective Time into the right to receive cash in an amount equal to the product of (i) the number of shares of BMC Common Stock subject to such BMC stock option as of immediately prior to the Effective Time and (ii) the excess of the market value of 1.3125 shares of BLDR Common Stock over the applicable exercise price per share of such option, subject to applicable withholding taxes. Each outstanding BMC time-vested and performance-vested restricted stock unit will vest and settle at the Effective Time in a number of shares of BLDR Common Stock equal to the number of shares of BMC Common Stock otherwise issuable upon settlement of such BMC restricted stock unit (assuming target level of performance for performance-vested awards), multiplied by the Exchange Ratio, and subject to applicable withholding taxes.

The Merger is intended to qualify as a tax-free reorganization under the Internal Revenue Code so that none of the Company, Builders FirstSource, Merger Sub, or any of the Company’s stockholders generally will recognize any gain or loss on the issuance or receipt of BLDR Common Stock in the Merger, except that the Company’s stockholders generally may recognize gain or loss with respect to cash received in lieu of fractional shares of BLDR Common Stock.

The Company and Builders FirstSource have made customary representations, warranties and covenants in the Merger Agreement, including covenants regarding the conduct of their respective businesses during the pre-closing period and their use of reasonable best efforts to consummate the Merger. In addition, the Merger Agreement contains restrictions on the Company’s and Builders FirstSource’s ability to (i) solicit competing acquisition proposals and (ii) subject to certain exceptions if their respective boards of directors determine it would be inconsistent with their fiduciary duties, to participate in any discussions or negotiations, or provide any non-public information, or take other actions in furtherance of or relating to any competing acquisition proposals, or change, withdraw, qualify, or modify the recommendation by the Company’s or Builders FirstSource’s board of directors to their respective stockholders to adopt the Merger Agreement and approve the issuance of BLDR Common Stock in the Merger (the “Stock Issuance”), respectively.

The Merger Agreement contains certain termination rights for both the Company and Builders FirstSource, including (i) if the Merger is not consummated on or before the “outside date” of May 26, 2021 (subject to extension to August 26, 2021, under certain circumstances), (ii) if the required approval of the Company’s stockholders or Builders FirstSource’s stockholders is not obtained, (iii) if any law or order prohibiting the Merger or the Stock Issuance has become final and non-appealable, (iv) if the board of directors of the other party changes its recommendation of the Merger prior to the receipt of its stockholder approval, (v) if the other party breaches its obligation not to solicit competing acquisition proposals in any material respect, or (vi) if the other party breaches its representations or warranties or fails to perform its covenants and such breach would cause a failure of the related closing condition and either is not curable by the outside date or is not cured within thirty days of notice of the breach. Upon termination of the Merger Agreement, under certain specified circumstances, the Company may be required to pay a termination fee of $66 million to Builders FirstSource or Builders FirstSource may be required to pay a termination fee of $100 million to the Company.

The foregoing description of the Merger Agreement is not complete and is qualified in its entirety by reference to the full text of the Merger Agreement included as Exhibit 2.1 to the Company’s Current Report on Form 8-K filed with the SEC on August 27, 2020 and incorporated by reference in this Quarterly Report on Form 10-Q.

The Company incurred Merger-related costs of $8.5 million and $9.2 million for the three and nine months ended September 30, 2020, respectively, which are included in selling, general and administrative expenses on the condensed consolidated statements of operations.

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Acquisitions

9 Months Ended

Sep. 30, 2020

Business Combinations [Abstract]

Acquisitions

Acquisitions

For all acquisitions, the Company allocates the purchase price to assets acquired and liabilities assumed as of the date of acquisition based on the estimated fair values at the date of acquisition. The excess of the fair value of the purchase consideration over the fair values of the identifiable assets and liabilities is recorded as goodwill. Management makes significant estimates and assumptions when determining the fair value of assets acquired and liabilities assumed. These estimates include, but are not limited to, discount rates, projected future net sales, projected future expected cash flows and useful lives. During the measurement period, fair values assigned to the assets and liabilities may be adjusted as the Company receives additional information.

The Company accounts for all acquisitions using the acquisition method of accounting under ASC 805, Business Combinations, whereby the results of operations of the acquired company are included in the Company’s consolidated financial statements beginning on the acquisition date.

2019 Acquisitions

The Company completed the following acquisitions during the nine months ended September 30, 2019:

•On January 14, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Barefoot and Company (“Barefoot”), a supplier of windows, exterior doors, hardware, specialty products and installation services in the Charlotte, North Carolina metropolitan area.

•On February 8, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Locust Lumber, a supplier of lumber products and building materials primarily to custom homebuilders and professional remodeling contractors in the Charlotte, North Carolina metropolitan area.

•On August 1, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Kingston Lumber, a supplier of lumber products, trusses and other building materials primarily to custom homebuilders and professional remodeling contractors in the Seattle, Washington metropolitan area.

•On September 3, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Heritage One Door & Carpentry (“Heritage One”), a supplier of pre-hung doors, millwork, hardware and finish carpentry services in the Sacramento, California metropolitan area.

•On September 16, 2019, the Company acquired substantially all of the assets and assumed certain liabilities of Colorado Fasteners, a supplier of fasteners, tools and other related products in the Denver, Colorado metropolitan area.

The Barefoot, Locust Lumber, Kingston Lumber, Heritage One and Colorado Fasteners acquisitions (the “Acquisitions”) enhance the Company’s value-added offerings and footprint in the respective metropolitan areas.

The purchase price, in aggregate, for the Acquisitions was $89.5 million. The aggregate purchase price included a holdback which, after certain post-closing adjustments, required the Company to pay $4.2 million, in aggregate, to the sellers of certain of

the Acquisitions during the nine months ended September 30, 2020. The Company funded the Acquisitions through available cash.

The purchase price allocation for the Acquisitions, in aggregate, resulted in the recognition of goodwill of $19.0 million, customer relationship intangible assets of $33.1 million, non-compete agreement intangible assets of $0.5 million, accounts receivable of $22.1 million, inventory of $14.6 million and property and equipment of $5.6 million, as well as other operating assets and liabilities. The customer relationship and non-compete agreement intangible assets have a weighted average useful life of 9 years and 4 years, respectively. Goodwill represents the future economic benefits expected to arise from other intangible assets acquired that do not qualify for separate recognition, including assembled workforce and non-contractual relationships, as well as expected future synergies. All of the goodwill is expected to be deductible for tax purposes.

Net sales and estimated pre-tax earnings for the Acquisitions, in aggregate, included in the unaudited condensed consolidated statements of operations during the three months ended September 30, 2019 were $38.7 million and $2.9 million, respectively. Net sales and estimated pre-tax earnings for the Acquisitions, in aggregate, included in the unaudited condensed consolidated statements of operations during the nine months ended September 30, 2019 were $84.6 million and $7.1 million, respectively. The impact of the Acquisitions was not considered significant for the reporting of pro forma financial information.

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Accounts Receivable

9 Months Ended

Sep. 30, 2020

Receivables [Abstract]

Accounts Receivable

Accounts Receivable

Accounts receivable consist of the following at September 30, 2020 and December 31, 2019:

(in thousands)	September 30, 2020		December 31, 2019
Trade receivables	$	403,406	$	334,059
Allowance for doubtful accounts	(6,635)		(5,674)
Other allowances	(3,036)		(2,644)
	$	393,735	$	325,741

The allowance for doubtful accounts is based on an assessment of individual past due accounts, historical write-off experience, accounts receivable aging, customer disputes and the current and forecasted business environment. Account balances are charged off when the potential for recovery is considered remote. The following table shows the changes in the allowance for doubtful accounts for the nine months ended September 30, 2020:

(in thousands)	2020
Balance at January 1	$	5,674
Write-offs	(2,185)
Recoveries	1,247
Increase in allowance	1,899
Balance at September 30	$	6,635

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Debt

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Debt

Debt

Long-term debt as of September 30, 2020 and December 31, 2019 consists of the following:

(in thousands)	September 30, 2020		December 31, 2019
Senior secured notes, due 2024	$	350,000	$	350,000
Revolving credit agreement	—		—
	350,000		350,000
Unamortized debt issuance costs related to senior secured notes	(3,341)		(3,968)
	346,659		346,032
Less: Current portion of long-term debt	—		—
	$	346,659	$	346,032

Senior Secured Notes

On September 15, 2016, the Company issued $350.0 million of senior secured notes due 2024 (the “Senior Notes”) under an unregistered private placement not subject to the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”). The Senior Notes were issued by BMC East, LLC, a 100% owned subsidiary of the Company, and are guaranteed by the Company and the other subsidiaries that guarantee the Credit Agreement (as defined below). Each of the subsidiary guarantors is 100% owned, directly or indirectly, by the Company, and all guarantees are full and unconditional and joint and several. The interest rate is fixed at 5.5% and is payable semiannually on April 1 and October 1.

As of September 30, 2020, the estimated market value of the Senior Notes was approximately $10.3 million higher than the carrying amount. The fair value is based on institutional trading activity and was classified as a Level 2 measurement in accordance with ASC 820.

Revolving Credit Agreement

On December 1, 2015, the Company entered into a senior secured credit agreement with Wells Fargo Capital Finance, as administrative agent, and certain other lenders (the “Original Credit Agreement”), which includes a revolving credit facility (the “Revolver”). The Original Credit Agreement, as amended (the “Credit Agreement), has an aggregate commitment of $425.0 million. The Credit Agreement matures at the earlier of (i) May 31, 2024 and (ii) if the Senior Notes are refinanced or repaid, the date that is 91 days prior to the new maturity date of the replacement notes or other indebtedness that replaced or refinanced the Senior Notes. The Company had no outstanding borrowings under the Revolver with net availability of $362.3 million as of September 30, 2020. The Company had $61.6 million in letters of credit outstanding under the Credit Agreement as of September 30, 2020.

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Revenue

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

Disaggregation of revenue

The following table shows net sales classified by major product category for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2020		2019		2020		2019
Millwork, doors & windows	$	299,812	$	285,750	$	883,480	$	796,807
Structural components	185,910		175,344		510,789		483,575
Lumber & lumber sheet goods	383,626		274,908		935,582		798,722
Other building products & services	220,995		228,247		661,267		656,925
Total net sales	$	1,090,343	$	964,249	$	2,991,118	$	2,736,029

The following table reflects the Company’s estimate of net sales by each customer type for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2020		2019		2020		2019
Single-family homebuilders	$	811,081	$	718,690	$	2,188,240	$	2,064,382
Remodeling contractors	143,536		115,756		375,904		314,277
Multi-family, commercial & other contractors	135,726		129,803		426,974		357,370
Total net sales	$	1,090,343	$	964,249	$	2,991,118	$	2,736,029

Net sales for the Company's building products contracts was $850.9 million, $728.5 million, $2,276.9 million and $2,061.8 million for the three and nine months ended September 30, 2020 and 2019, respectively. Net sales for the Company's construction services contracts, which includes both products and installation services, was $239.5 million, $235.8 million, $714.2 million and $674.3 million for the three and nine months ended September 30, 2020 and 2019, respectively.

Contract balances

The following table reflects the Company’s contract balances as of September 30, 2020 and December 31, 2019:

(in thousands)	September 30, 2020		December 31, 2019		Change
Receivables, including unbilled receivables presented in prepaid expenses and other current assets	$	409,640	$	333,044	$	76,596
Contract assets	36,422		32,125		4,297
Contract liabilities	$	44,980	$	31,094	$	13,886

During the nine months ended September 30, 2020, the Company’s contract assets increased by $4.3 million and the Company’s contract liabilities increased by $13.9 million. The changes in contract assets and liabilities were primarily due to the timing of revenue recognition, as the balances were not materially impacted by any other factors. For the three and nine months ended September 30, 2020, the Company recognized revenue of $1.4 million and $29.2 million, respectively, that was included in contract liabilities as of December 31, 2019. Revenue recognized related to performance obligations that were satisfied or partially satisfied in previous periods was not material for the three and nine months ended September 30, 2020.

As permitted by ASC 606, Revenue from Contracts with Customers, the Company has elected not to disclose the value of unsatisfied performance obligations, as the Company’s contracts generally have an original expected length of one year or less.

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Income Taxes

9 Months Ended

Sep. 30, 2020

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company evaluates its deferred tax assets quarterly to determine if valuation allowances are required. In assessing the realizability of deferred tax assets, the Company considers both positive and negative evidence in determining whether it is more likely than not that some portion or all of the deferred tax assets will not be realized.

The Company had a valuation allowance of $0.2 million against its deferred tax assets related to certain state tax jurisdictions as of September 30, 2020 and $0.1 million as of December 31, 2019. To the extent the Company generates future tax net operating losses, the Company may be required to increase the valuation allowance on deferred tax assets, which may unfavorably impact the effective tax rate.

The Company has no material uncertain tax positions as of September 30, 2020 and December 31, 2019.

For the three and nine months ended September 30, 2020, the Company’s effective tax rate was 23.5% and 23.8%, respectively, which varied from the federal statutory rate of 21% primarily due to state income taxes and nondeductible Merger-related costs. For the three and nine months ended September 30, 2019, the Company’s effective tax rate was 28.2% and 24.9%, respectively, which varied from the federal statutory rate of 21% primarily due to state income taxes and an out of period expense.

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law. The CARES Act provides numerous tax provision and other stimulus measures. The Company expects to benefit from the technical correction related to qualified leasehold improvements, which provides for tax bonus depreciation. If the Company generates a net operating loss (“NOL”) in 2020, it would also expect to benefit from the five-year NOL carryback provisions included in the CARES Act. To the extent that states in which the Company operates provide for similar stimulus measures, the Company will evaluate potential benefits at the state-level as well. For the nine months ended September 30, 2020, the Company recognized a decrease in income taxes payable of $1.4 million and a corresponding increase in its deferred income taxes related to increased bonus depreciation on qualified improvement property allowable under the CARES Act.

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Commitments and Contingencies	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and ContingenciesFrom time to time, various claims, legal proceedings and litigation are asserted or commenced against the Company principally arising from alleged product liability, warranty, casualty, construction defect, contract, tort, employment and other disputes. In determining loss contingencies, management considers the likelihood of loss as well as the ability to reasonably estimate the amount of such loss or liability. An estimated loss is recorded when it is considered probable that such a liability has been incurred and when the amount of loss can be reasonably estimated. It is not certain that the Company will prevail in these matters. However, the Company does not currently believe that the ultimate outcome of any pending matters will have a material adverse effect on its consolidated financial position, results of operations or cash flows.

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Stock Based Compensation

9 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

Stock Based Compensation

Stock Based Compensation

The following table highlights stock based compensation for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Restricted stock units (a)	$	4,612	$	3,014	$	10,748	$	9,177
Stock options (b)	—		—		362		—
Stock based compensation	$	4,612	$	3,014	$	11,110	$	9,177

(a) Includes service-based and performance-based restricted stock units.

(b) Represents expense related to a modification of vested stock options.

During the three and nine months ended September 30, 2020, the Company granted less than 0.1 million and 0.4 million service-based restricted stock unit awards, respectively. In addition, during the nine months ended September 30, 2020, the Company granted performance-based restricted stock units that allow for a maximum of 0.2 million performance-based restricted stock units to be earned.

During the nine months ended September 30, 2019, the Company granted 0.5 million service-based restricted stock unit awards and performance-based restricted stock units that allow for a maximum of 0.4 million performance-based restricted stock units to be earned.

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Segments

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Segments

Segments

ASC 280, Segment Reporting, defines operating segments as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to allocate resources and in assessing performance.

The Company’s operating segments consist of the Mid-Atlantic, Southeast, Texas, Intermountain and Western divisions. The CODM reviews aggregate information to allocate resources and assess performance. Based on the CODM’s review, as well as the similar economic characteristics, nature of products, distribution methods and customers of the divisions, the Company has aggregated its operating segments into one reportable segment, “Geographic divisions.”

In addition to the Company’s reportable segment, the Company’s consolidated results include “Other reconciling items.” Other reconciling items comprises the Company’s corporate activities and other income and expenses not allocated to the operating segments.

The following tables present Net Sales, Adjusted EBITDA and certain other measures for the reportable segment and total Company operations for the three and nine months ended September 30, 2020 and 2019. Adjusted EBITDA is used as a performance metric by the CODM in determining how to allocate resources and assess performance.

	Three Months Ended September 30, 2020
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	1,090,343	$	273,082	$	19,941	$	114,149
Other reconciling items	—		—		512		(14,961)
	$	1,090,343	$	273,082	$	20,453

	Three Months Ended September 30, 2019
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	964,249	$	254,767	$	17,974	$	96,752
Other reconciling items	—		—		561		(22,094)
	$	964,249	$	254,767	$	18,535

	Nine Months Ended September 30, 2020
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	2,991,118	$	763,032	$	59,218	$	300,991
Other reconciling items	—		—		1,529		(50,448)
	$	2,991,118	$	763,032	$	60,747

	Nine Months Ended September 30, 2019
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	2,736,029	$	716,666	$	51,121	$	260,537
Other reconciling items	—		—		1,838		(58,150)
	$	2,736,029	$	716,666	$	52,959

Reconciliation to consolidated financial statements:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2020		2019		2020		2019
Income before income taxes	$	58,701	$	46,787	$	144,980	$	119,326
Interest expense	5,744		5,773		17,880		17,385
Interest income	(224)		(1,047)		(1,146)		(2,832)
Depreciation and amortization	20,453		18,535		60,747		52,959
Merger-related costs	8,488		—		9,150		—
Acquisition and integration costs (a)	1,377		1,524		4,566		6,294
Non-cash stock compensation expense	4,612		3,014		11,110		9,177
Business reorganization costs (b)	37		72		3,256		300
Other items (c)	—		—		—		(222)
Adjusted EBITDA of other reconciling items	14,961		22,094		50,448		58,150
Adjusted EBITDA of geographic divisions reportable segment	$	114,149	$	96,752	$	300,991	$	260,537

(a) Represents costs for acquisitions and related integration costs, as well as system integration and other costs related to the integration of BMHC and SBS as a result of the 2015 merger transaction.

(b) For the three and nine months ended September 30, 2020, represents asset impairment and other charges related to the closure or relocation of the operations of certain of the Company’s facilities, which were not related to the COVID-19 pandemic, and severance expense related to permanent headcount reductions due to the impact of the COVID-19 pandemic. For the three and nine months ended September 30, 2019, represents asset impairment charges and the effect of certain customary post-closing adjustments related to the November 1, 2018 disposition of the Company’s Coleman Floor business.

(c) For the nine months ended September 30, 2019, represents income from a recovery made by the Company related to a fire at one of the Company’s facilities during 2015 and the effect of the settlement of pending litigation for an amount below what was previously accrued.

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Earnings Per Share

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per ShareBasic net income per share (“EPS”) is calculated by dividing net income attributable to common stockholders by the weighted average shares outstanding during the period. Diluted EPS is calculated by adjusting weighted average shares outstanding for the dilutive effect of potential common shares, determined using the treasury-stock method. For purposes of the diluted EPS calculation, stock options and restricted stock unit awards are considered to be potential common shares. Performance-based restricted stock units are not included in the calculation of diluted EPS until they are contingently issuable.

The basic and diluted EPS calculations for the three and nine months ended September 30, 2020 and 2019 are presented below:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share amounts)	2020		2019		2020		2019
Income attributable to common stockholders	$	44,895	$	33,597	$	110,546	$	89,646
Weighted average common shares outstanding, basic	67,141		66,685		67,001		66,681
Effect of dilutive securities:
Restricted stock units (a)	682		544		602		450
Stock options	144		132		122		109
Weighted average common shares outstanding, diluted	67,967		67,361		67,725		67,240
Basic income per common share	$	0.67	$	0.50	$	1.65	$	1.34
Diluted income per common share	$	0.66	$	0.50	$	1.63	$	1.33

(a) Includes service-based and contingently issuable performance-based restricted stock units.

For the three and nine months ended September 30, 2020 and 2019, there were no anti-dilutive restricted stock units or stock options. As of September 30, 2020, the number of currently outstanding performance-based restricted stock units that are issued upon vesting could range from zero to a maximum of 0.9 million.

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Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of presentation

Basis of PresentationThe unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) that permit reduced disclosure for interim periods. The condensed consolidated balance sheet as of December 31, 2019 was derived from audited financial statements, but does not include all necessary disclosures required by accounting principles generally accepted in the United States of America (“GAAP”). The unaudited condensed consolidated financial statements include all accounts of the Company and, in the opinion of management, include all recurring adjustments and normal accruals necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the dates and periods presented. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 (“2019 Annual Report on Form 10-K”). Results for interim periods are not necessarily indicative of the results to be expected during the remainder of the current year or for any future period. All material intercompany accounts and transactions have been eliminated in consolidation.

Comprehensive income

Comprehensive income

Comprehensive income is equal to the net income for all periods presented.

Cash and cash equivalents

Cash and cash equivalents

Cash equivalents are highly liquid investments that are readily convertible to known amounts of cash and have a maturity of three months or less from the time of purchase. As of September 30, 2020, the Company had no cash equivalents and as of December 31, 2019, the Company had cash equivalents of $4.4 million. Cash equivalents are valued at amortized cost, which approximates fair value due to the short-term maturity of these instruments, and were classified as Level 1 or Level 2 measurements in accordance with Accounting Standards Codification (“ASC”) 820, Fair Value Measurements and Disclosures (“ASC 820”).

Book overdrafts occur when purchases on corporate purchasing cards and checks written exceed available bank balances at a specific bank, despite there being cash at the Company’s other financial institutions. For accounting purposes, the Company reclassifies these book overdrafts to accounts payable on the consolidated balance sheets. Book overdrafts included in accounts payable were $19.5 million and $2.5 million at September 30, 2020 and December 31, 2019, respectively.

Use of estimates

Use of estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company evaluates these estimates and judgments on an ongoing basis and bases its estimates on historical experience, current conditions and various other assumptions that are believed to be reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies.

Certain accounting matters that generally require consideration of forecasted financial information were assessed in light of the impact from the COVID-19 pandemic as of September 30, 2020. The accounting matters assessed included, but were not limited to, the Company’s allowance for doubtful accounts, inventory reserves, supplier rebates, goodwill impairment, impairment of tangible and intangible long-lived assets, share-based compensation and valuation allowances for tax assets. While the assessments resulted in no material impacts to the Company’s condensed consolidated financial statements as of and for the three and nine months ended September 30, 2020, the Company believes the full impact of the COVID-19 pandemic remains uncertain and the Company will continue to assess if ongoing developments related to the pandemic may cause future material impacts to our consolidated financial statements.

Statement of cash flows

Statement of cash flows

Proceeds from revolving credit facility and repayments of proceeds from revolving credit facility as presented on the condensed consolidated statements of cash flows include all cash activities and transactions between the Company and its associated lenders in relation to the revolving credit facility, excluding interest and fees, and for the nine months ended September 30, 2019, is specifically inclusive of operating cash receipts that were automatically applied to the revolving credit facility pursuant to a voluntary cash sweep arrangement. See Note 6 for further details on the Company’s revolving credit facility.

Recently issued accounting pronouncements

Recently adopted accounting pronouncements

In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, and issued subsequent amendments to the initial guidance to provide additional clarification on specific topics (“ASU 2016-13”). ASU 2016-13 amends the impairment model by requiring entities to use a forward-looking approach based on expected losses to estimate credit losses on certain types of financial instruments, including trade receivables. ASU 2016-13 became effective for the Company’s annual and interim periods beginning on January 1, 2020. Modified retrospective application is required, with certain exceptions. The adoption of the standard did not have a material impact on the Company’s consolidated financial statements.

In January 2017, the FASB issued Accounting Standards Update 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires computation of the implied fair value of a reporting unit’s goodwill. The amount of a goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 became effective for the Company’s annual goodwill impairment test and any interim tests during the Company’s annual and interim periods beginning on January 1, 2020. Prospective application is required. The adoption of the standard did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued Accounting Standards Update 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). ASU 2018-13 modifies the disclosure requirements on fair value measurements by removing, modifying and adding certain disclosure requirements in ASC 820. ASU 2018-13 became effective for the Company’s annual and interim periods beginning on January 1, 2020. Certain disclosures in ASU 2018-13 are required to be applied prospectively, while others require retrospective application. The adoption of the standard did not have a material impact on the Company’s consolidated financial statements.

Recently issued accounting pronouncements not yet adopted

In December 2019, the FASB issued Accounting Standards Update 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”). ASU 2019-12 removes certain exceptions to the general principles in ASC 740 and clarifies and amends certain guidance to promote consistent application. ASU 2019-12 is effective for the Company's annual and interim periods beginning on January 1, 2021, with early adoption permitted. Depending on the amendment, adoption may be applied on a retrospective, modified retrospective or prospective basis. The adoption of the standard is not expected to have a material impact on the Company’s consolidated financial statements.

In March 2020, the FASB issued Accounting Standards Update 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by the expected transition away from reference rates that are expected to be discontinued, such as LIBOR. ASU 2020-04 was effective upon issuance. The Company may elect to apply the guidance prospectively through December 31, 2022. The Company is evaluating the impact of the standard on its consolidated financial statements.

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Acquisitions (Policies)	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Acquisitions	AcquisitionsFor all acquisitions, the Company allocates the purchase price to assets acquired and liabilities assumed as of the date of acquisition based on the estimated fair values at the date of acquisition. The excess of the fair value of the purchase consideration over the fair values of the identifiable assets and liabilities is recorded as goodwill. Management makes significant estimates and assumptions when determining the fair value of assets acquired and liabilities assumed. These estimates include, but are not limited to, discount rates, projected future net sales, projected future expected cash flows and useful lives. During the measurement period, fair values assigned to the assets and liabilities may be adjusted as the Company receives additional information.The Company accounts for all acquisitions using the acquisition method of accounting under ASC 805, Business Combinations, whereby the results of operations of the acquired company are included in the Company’s consolidated financial statements beginning on the acquisition date.

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Income Taxes (Policies)	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income taxes	Income Taxes The Company evaluates its deferred tax assets quarterly to determine if valuation allowances are required. In assessing the realizability of deferred tax assets, the Company considers both positive and negative evidence in determining whether it is more likely than not that some portion or all of the deferred tax assets will not be realized.

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Commitments and Contingencies (Policies)	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingencies	Commitments and ContingenciesFrom time to time, various claims, legal proceedings and litigation are asserted or commenced against the Company principally arising from alleged product liability, warranty, casualty, construction defect, contract, tort, employment and other disputes. In determining loss contingencies, management considers the likelihood of loss as well as the ability to reasonably estimate the amount of such loss or liability. An estimated loss is recorded when it is considered probable that such a liability has been incurred and when the amount of loss can be reasonably estimated.

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Earnings Per Share (Policies)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings per Share	Earnings Per ShareBasic net income per share (“EPS”) is calculated by dividing net income attributable to common stockholders by the weighted average shares outstanding during the period. Diluted EPS is calculated by adjusting weighted average shares outstanding for the dilutive effect of potential common shares, determined using the treasury-stock method. For purposes of the diluted EPS calculation, stock options and restricted stock unit awards are considered to be potential common shares. Performance-based restricted stock units are not included in the calculation of diluted EPS until they are contingently issuable.

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Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2020

Receivables [Abstract]

Schedule of accounts receivable

Accounts receivable consist of the following at September 30, 2020 and December 31, 2019:

(in thousands)	September 30, 2020		December 31, 2019
Trade receivables	$	403,406	$	334,059
Allowance for doubtful accounts	(6,635)		(5,674)
Other allowances	(3,036)		(2,644)
	$	393,735	$	325,741

Allowance For Doubtful Accounts [Table Text Block]

The following table shows the changes in the allowance for doubtful accounts for the nine months ended September 30, 2020:

(in thousands)	2020
Balance at January 1	$	5,674
Write-offs	(2,185)
Recoveries	1,247
Increase in allowance	1,899
Balance at September 30	$	6,635

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Debt (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Schedule of debt

Long-term debt as of September 30, 2020 and December 31, 2019 consists of the following:

(in thousands)	September 30, 2020		December 31, 2019
Senior secured notes, due 2024	$	350,000	$	350,000
Revolving credit agreement	—		—
	350,000		350,000
Unamortized debt issuance costs related to senior secured notes	(3,341)		(3,968)
	346,659		346,032
Less: Current portion of long-term debt	—		—
	$	346,659	$	346,032

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Revenue (Tables)

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

The following table shows net sales classified by major product category for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2020		2019		2020		2019
Millwork, doors & windows	$	299,812	$	285,750	$	883,480	$	796,807
Structural components	185,910		175,344		510,789		483,575
Lumber & lumber sheet goods	383,626		274,908		935,582		798,722
Other building products & services	220,995		228,247		661,267		656,925
Total net sales	$	1,090,343	$	964,249	$	2,991,118	$	2,736,029

The following table reflects the Company’s estimate of net sales by each customer type for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2020		2019		2020		2019
Single-family homebuilders	$	811,081	$	718,690	$	2,188,240	$	2,064,382
Remodeling contractors	143,536		115,756		375,904		314,277
Multi-family, commercial & other contractors	135,726		129,803		426,974		357,370
Total net sales	$	1,090,343	$	964,249	$	2,991,118	$	2,736,029

Contract balances

The following table reflects the Company’s contract balances as of September 30, 2020 and December 31, 2019:

(in thousands)	September 30, 2020		December 31, 2019		Change
Receivables, including unbilled receivables presented in prepaid expenses and other current assets	$	409,640	$	333,044	$	76,596
Contract assets	36,422		32,125		4,297
Contract liabilities	$	44,980	$	31,094	$	13,886

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Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

Schedule of expenses related to share-based payments

The following table highlights stock based compensation for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Restricted stock units (a)	$	4,612	$	3,014	$	10,748	$	9,177
Stock options (b)	—		—		362		—
Stock based compensation	$	4,612	$	3,014	$	11,110	$	9,177

(a) Includes service-based and performance-based restricted stock units.

(b) Represents expense related to a modification of vested stock options.

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Segments (Tables)

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Schedule of net sales, adjusted EBITDA and certain other measures by reportable segment

The following tables present Net Sales, Adjusted EBITDA and certain other measures for the reportable segment and total Company operations for the three and nine months ended September 30, 2020 and 2019. Adjusted EBITDA is used as a performance metric by the CODM in determining how to allocate resources and assess performance.

	Three Months Ended September 30, 2020
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	1,090,343	$	273,082	$	19,941	$	114,149
Other reconciling items	—		—		512		(14,961)
	$	1,090,343	$	273,082	$	20,453

	Three Months Ended September 30, 2019
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	964,249	$	254,767	$	17,974	$	96,752
Other reconciling items	—		—		561		(22,094)
	$	964,249	$	254,767	$	18,535

	Nine Months Ended September 30, 2020
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	2,991,118	$	763,032	$	59,218	$	300,991
Other reconciling items	—		—		1,529		(50,448)
	$	2,991,118	$	763,032	$	60,747

	Nine Months Ended September 30, 2019
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	2,736,029	$	716,666	$	51,121	$	260,537
Other reconciling items	—		—		1,838		(58,150)
	$	2,736,029	$	716,666	$	52,959

Reconciliation to consolidated financial statements

Reconciliation to consolidated financial statements:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2020		2019		2020		2019
Income before income taxes	$	58,701	$	46,787	$	144,980	$	119,326
Interest expense	5,744		5,773		17,880		17,385
Interest income	(224)		(1,047)		(1,146)		(2,832)
Depreciation and amortization	20,453		18,535		60,747		52,959
Merger-related costs	8,488		—		9,150		—
Acquisition and integration costs (a)	1,377		1,524		4,566		6,294
Non-cash stock compensation expense	4,612		3,014		11,110		9,177
Business reorganization costs (b)	37		72		3,256		300
Other items (c)	—		—		—		(222)
Adjusted EBITDA of other reconciling items	14,961		22,094		50,448		58,150
Adjusted EBITDA of geographic divisions reportable segment	$	114,149	$	96,752	$	300,991	$	260,537

(a) Represents costs for acquisitions and related integration costs, as well as system integration and other costs related to the integration of BMHC and SBS as a result of the 2015 merger transaction.

(b) For the three and nine months ended September 30, 2020, represents asset impairment and other charges related to the closure or relocation of the operations of certain of the Company’s facilities, which were not related to the COVID-19 pandemic, and severance expense related to permanent headcount reductions due to the impact of the COVID-19 pandemic. For the three and nine months ended September 30, 2019, represents asset impairment charges and the effect of certain customary post-closing adjustments related to the November 1, 2018 disposition of the Company’s Coleman Floor business.

(c) For the nine months ended September 30, 2019, represents income from a recovery made by the Company related to a fire at one of the Company’s facilities during 2015 and the effect of the settlement of pending litigation for an amount below what was previously accrued.

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Schedule of basic and diluted EPS calculations

The basic and diluted EPS calculations for the three and nine months ended September 30, 2020 and 2019 are presented below:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share amounts)	2020		2019		2020		2019
Income attributable to common stockholders	$	44,895	$	33,597	$	110,546	$	89,646
Weighted average common shares outstanding, basic	67,141		66,685		67,001		66,681
Effect of dilutive securities:
Restricted stock units (a)	682		544		602		450
Stock options	144		132		122		109
Weighted average common shares outstanding, diluted	67,967		67,361		67,725		67,240
Basic income per common share	$	0.67	$	0.50	$	1.65	$	1.34
Diluted income per common share	$	0.66	$	0.50	$	1.63	$	1.33

(a) Includes service-based and contingently issuable performance-based restricted stock units.

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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended					9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Organization Consolidation And Presentation [Line Items]
Cash equivalents	$ 0					$ 0		$ 4,400,000
Repurchases of common stock under share repurchase program (shares)	0		0			100,000	1,000,000.0
Weighted average cost of repurchased shares						$ 16.20	$ 17.11
Repurchases of common stock under share repurchase program		$ 1,416,000		$ 737,000	$ 15,709,000	$ 1,400,000	$ 16,400,000
Share repurchase program authorized	$ 75,000,000.0					75,000,000.0
Remaining under current repurchase authorization	54,200,000					54,200,000
Selling, General and Administrative Expenses [Member]
Organization Consolidation And Presentation [Line Items]
Merger and integration costs	900,000					2,400,000
Accounts Payable [Member]
Organization Consolidation And Presentation [Line Items]
Book Overdraft	$ 19,500,000					$ 19,500,000		$ 2,500,000

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Merger Agreement with Builders FirstSource, Inc. (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) $ / shares	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) $ / shares	Sep. 30, 2019 USD ($)	Dec. 31, 2019 $ / shares
Business Acquisition [Line Items]
Par value | $ / shares	$ 0.01		$ 0.01		$ 0.01
Exchange ratio			1.3125
Merger related costs | $	$ 8,488	$ 0	$ 9,150	$ 0
BMC Stock Holdings, Inc. [Member]
Business Acquisition [Line Items]
Par value | $ / shares	$ 0.01		$ 0.01
Ownership percent	43.00%		43.00%
Termination fee | $			$ 66,000
Builders FirstSource [Member]
Business Acquisition [Line Items]
Par value | $ / shares	$ 0.01		$ 0.01
Ownership percent	57.00%		57.00%
Termination fee | $			$ 100,000

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Acquisitions (Narrative) (Details) - USD ($) $ in Thousands						3 Months Ended	9 Months Ended
	Sep. 16, 2019	Sep. 03, 2019	Aug. 01, 2019	Feb. 08, 2019	Jan. 14, 2019	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Acquisition holdback							$ 3,462	$ 4,527
Goodwill							295,390		$ 297,146
Barefoot [Member]
Business Acquisition [Line Items]
Date of acquisition					Jan. 14, 2019
Locust [Member]
Business Acquisition [Line Items]
Date of acquisition				Feb. 08, 2019
Kingston Lumber [Member]
Business Acquisition [Line Items]
Date of acquisition			Aug. 01, 2019
Heritage One [Member]
Business Acquisition [Line Items]
Date of acquisition		Sep. 03, 2019
Colorado Fasteners [Member]
Business Acquisition [Line Items]
Date of acquisition	Sep. 16, 2019
2019 Acquisitions [Member]
Business Acquisition [Line Items]
Purchase price						$ 89,500		89,500
Acquisition holdback								4,200
Payment of acquisition holdback							$ 4,200
Goodwill						19,000		19,000
Accounts receivable						22,100		22,100
Inventory						14,600		14,600
Property and equipment						5,600		5,600
Net sales of acquiree since acquisition date						38,700		84,600
Estimated pre-tax earnings of acquiree since acquisition date						2,900		7,100
Customer relationships [Member] | 2019 Acquisitions [Member]
Business Acquisition [Line Items]
Intangible assets						33,100		$ 33,100
Useful life								9 years
Non-compete agreements [Member] | 2019 Acquisitions [Member]
Business Acquisition [Line Items]
Intangible assets						$ 500		$ 500
Useful life								4 years

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Accounts Receivable (Accounts Receivable) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Receivables [Abstract]
Trade receivables	$ 403,406	$ 334,059
Allowance for doubtful accounts	(6,635)	(5,674)
Other allowances	(3,036)	(2,644)
Accounts receivable, net	$ 393,735	$ 325,741

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Accounts Receivable (Allowance) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at January 1	$ 5,674
Write-offs	(2,185)
Recoveries	1,247
Increase in allowance	1,899
Balance at September 30	$ 6,635

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Debt (Debt Table) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Sep. 15, 2016
Debt Instrument [Line Items]
Outstanding borrowings	$ 350,000,000	$ 350,000,000
Unamortized debt issuance costs related to senior secured notes	(3,341,000)	(3,968,000)
Total debt	346,659,000	346,032,000
Less: Current portion of long-term debt	0	0
Long-term debt	346,659,000	346,032,000
Senior secured notes, due 2024 [Member]
Debt Instrument [Line Items]
Outstanding borrowings	350,000,000	350,000,000	$ 350,000,000.0
Revolving credit agreement [Member]
Debt Instrument [Line Items]
Outstanding borrowings	$ 0	$ 0

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Debt (Narrative) (Details) - USD ($)			9 Months Ended
	Sep. 15, 2016	Dec. 01, 2015	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Outstanding borrowings			$ 350,000,000		$ 350,000,000
Repayment of revolver borrowings			144,000,000	$ 110,987,000
Senior secured notes, due 2024 [Member]
Debt Instrument [Line Items]
Debt issuance date	Sep. 15, 2016
Interest rate	5.50%
Estimated market value above (below) carrying amount			10,300,000
Outstanding borrowings	$ 350,000,000.0		350,000,000		350,000,000
Revolving credit agreement [Member]
Debt Instrument [Line Items]
Date entered into agreement		Dec. 01, 2015
Maximum borrowing capacity			425,000,000.0
Outstanding borrowings			0		$ 0
Net availability			362,300,000
Letters of credit outstanding			$ 61,600,000
Guarantor Subsidiaries [Member] | Senior secured notes, due 2024 [Member]
Debt Instrument [Line Items]
Ownership percent	100.00%
BMC East, LLC [Member] | Senior secured notes, due 2024 [Member]
Debt Instrument [Line Items]
Ownership percent	100.00%

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Revenue (Revenue by Product Category) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 1,090,343	$ 964,249	$ 2,991,118	$ 2,736,029
Millwork, doors & windows [Member]
Disaggregation of Revenue [Line Items]
Net sales	299,812	285,750	883,480	796,807
Structural components [Member]
Disaggregation of Revenue [Line Items]
Net sales	185,910	175,344	510,789	483,575
Lumber & lumber sheet goods [Member]
Disaggregation of Revenue [Line Items]
Net sales	383,626	274,908	935,582	798,722
Other building products & services [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 220,995	$ 228,247	$ 661,267	$ 656,925

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Revenue (Revenue by Customer Type) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 1,090,343	$ 964,249	$ 2,991,118	$ 2,736,029
Single-family homebuilders [Member]
Disaggregation of Revenue [Line Items]
Net sales	811,081	718,690	2,188,240	2,064,382
Remodeling contractors [Member]
Disaggregation of Revenue [Line Items]
Net sales	143,536	115,756	375,904	314,277
Multi-family, commercial & other contractors [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 135,726	$ 129,803	$ 426,974	$ 357,370

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Revenue (Contract Assets and Liabilities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Receivables, including unbilled receivables presented in prepaid expenses and other current assets	$ 409,640	$ 333,044
Receivables, including unbilled receivables change	76,596
Contract assets	36,422	32,125
Contract assets change	4,297
Contract liabilities	44,980	$ 31,094
Contract liabilities change	$ 13,886

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Revenue (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 1,090,343	$ 964,249	$ 2,991,118	$ 2,736,029
Contract assets change			4,297
Contract liabilities change			13,886
Revenue recognized previously included in contract liabilities	1,400		29,200
Building Products [Member]
Disaggregation of Revenue [Line Items]
Net sales	850,900	728,500	2,276,900	2,061,800
Construction Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 239,500	$ 235,800	$ 714,200	$ 674,300

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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Tax Contingency [Line Items]
Valuation allowance	$ 200		$ 200		$ 100
Effective income tax rate	23.50%	28.20%	23.80%	24.90%
Federal statutory rate	21.00%	21.00%	21.00%	21.00%
Change in income tax payable related to CARES Act			$ (1,400)
Deferred income tax benefit, CARES Act			$ 1,400

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Stock Based Compensation (Stock based compensation expense) (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2020		Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation		$ 4,612		$ 3,014	$ 11,110		$ 9,177
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	[1]	4,612		3,014	10,748		9,177
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation		$ 0	[2]	$ 0	$ 362	[2]	$ 0

[1] Includes service-based and performance-based restricted stock units.

[2] Represents expense related to a modification of vested stock options.

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Stock Based Compensation (Narrative) (Details) - shares shares in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted	0.1	0.4	0.5
Maximum [Member] | Performance-based restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based shares available for vesting		0.2	0.4

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Segments (Schedule of net sales, adjusted EBITDA and certain other measures by reportable segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Net sales	$ 1,090,343	$ 964,249	$ 2,991,118	$ 2,736,029
Gross profit	273,082	254,767	763,032	716,666
Depreciation & amortization	20,453	18,535	60,747	52,959
Operating segments [Member] | Geographic divisions [Member]
Segment Reporting Information [Line Items]
Net sales	1,090,343	964,249	2,991,118	2,736,029
Gross profit	273,082	254,767	763,032	716,666
Depreciation & amortization	19,941	17,974	59,218	51,121
Adjusted EBITDA	114,149	96,752	300,991	260,537
Other reconciling items [Member] | Other reconciling items [Member]
Segment Reporting Information [Line Items]
Net sales	0	0	0	0
Gross profit	0	0	0	0
Depreciation & amortization	512	561	1,529	1,838
Adjusted EBITDA	$ (14,961)	$ (22,094)	$ (50,448)	$ (58,150)

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Segments (Reconciliation of adjusted EBITDA to consolidated financial statements) (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019		Sep. 30, 2020	Sep. 30, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Income before income taxes		$ 58,701	$ 46,787		$ 144,980	$ 119,326
Interest expense		5,744	5,773		17,880	17,385
Interest income		(224)	(1,047)		(1,146)	(2,832)
Depreciation and amortization		20,453	18,535		60,747	52,959
Merger related costs		8,488	0		9,150	0
Acquisition and integration costs	[1]	1,377	1,524		4,566	6,294
Non-cash stock compensation expense		4,612	3,014		11,110	9,177
Business reorganization costs	[2]	37	72		3,256	300
Other items		0	0	[3]	0	(222)	[3]
Other reconciling items [Member] | Other reconciling items [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Depreciation and amortization		512	561		1,529	1,838
Adjusted EBITDA		14,961	22,094		50,448	58,150
Operating segments [Member] | Geographic divisions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Depreciation and amortization		19,941	17,974		59,218	51,121
Adjusted EBITDA		$ (114,149)	$ (96,752)		$ (300,991)	$ (260,537)

[1] Represents costs for acquisitions and related integration costs, as well as system integration and other costs related to the integration of BMHC and SBS as a result of the 2015 merger transaction.

[2] For the nine months ended September 30, 2019, represents income from a recovery made by the Company related to a fire at one of the Company’s facilities during 2015 and the effect of the settlement of pending litigation for an amount below what was previously accrued.

[3] For the three and nine months ended September 30, 2020, represents asset impairment and other charges related to the closure or relocation of the operations of certain of the Company’s facilities, which were not related to the COVID-19 pandemic, and severance expense related to permanent headcount reductions due to the impact of the COVID-19 pandemic. For the three and nine months ended September 30, 2019, represents asset impairment charges and the effect of certain customary post-closing adjustments related to the November 1, 2018 disposition of the Company’s Coleman Floor business.

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Segments (Narrative) (Details)	9 Months Ended
	Sep. 30, 2020 segment
Segment Reporting Information [Line Items]
Number of reportable segments	1

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Earnings Per Share (Basic and Diluted EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended						9 Months Ended
		Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Income attributable to common stockholders		$ 44,895	$ 43,622	$ 22,029	$ 33,597	$ 35,699	$ 20,350	$ 110,546	$ 89,646
Weighted average common shares outstanding, basic (in shares)		67,141			66,685			67,001	66,681
Weighted average common shares outstanding, diluted (in shares)		67,967			67,361			67,725	67,240
Basic income per common share (in dollars per share)		$ 0.67			$ 0.50			$ 1.65	$ 1.34
Diluted income per common share (in dollars per share)		$ 0.66			$ 0.50			$ 1.63	$ 1.33
Restricted stock units [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock based payment arrangements (in shares)	[1]	682			544			602	450
Stock options [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock based payment arrangements (in shares)		144			132			122	109

[1] Includes service-based and contingently issuable performance-based restricted stock units.

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Earnings Per Share (Narrative) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	0	0	0	0
Performance-based restricted stock units [Member] | Minimum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Performance-based restricted stock units that could be issued upon vesting	0		0
Performance-based restricted stock units [Member] | Maximum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Performance-based restricted stock units that could be issued upon vesting	900,000		900,000