Document

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, 2019

☐ 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.)
8020 Arco Corporate Drive, Suite 400
Raleigh,	North Carolina	27617
(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 4, 2019 was 66,749,662 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, 2019 and December 31, 2018	1
	Condensed Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 2019 and 2018	2
	Condensed Consolidated Statements of Stockholders’ Equity for the Three and Nine Months Ended September 30, 2019 and 2018	3
	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2019 and 2018	4
	Notes to Condensed Consolidated Financial Statements	5
Item 2	Management's Discussion and Analysis of Financial Condition and Results of Operations	17
Item 3	Quantitative and Qualitative Disclosures About Market Risk	28
Item 4	Controls and Procedures	28
	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	30
Item 3	Defaults Upon Senior Securities	30
Item 4	Mine Safety Disclosures	30
Item 5	Other Information	30
Item 6	Exhibits	31
	Signature	32

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, 2019			December 31, 2018
Assets
Current assets
Cash and cash equivalents	$	173,259		$	150,723
Accounts receivable, net of allowances	344,645			298,440
Inventories, net	324,458			309,279
Contract assets	36,759			32,348
Prepaid expenses and other current assets	66,407			56,249
Total current assets	945,528			847,039
Property and equipment, net of accumulated depreciation	338,361			294,327
Operating lease right-of-use assets	125,093			—
Customer relationship intangible assets, net of accumulated amortization	178,526			158,563
Other intangible assets, net of accumulated amortization	645			325
Goodwill	283,366			262,997
Other long-term assets	8,669			12,860
Total assets	$	1,880,188		$	1,576,111
Liabilities and Stockholders’ Equity
Current liabilities
Accounts payable	$	201,709		$	123,495
Accrued expenses and other liabilities	103,003			110,276
Contract liabilities	34,501			34,888
Income taxes payable	8,879			902
Interest payable	9,572			4,759
Current portion:
Long-term debt and finance lease obligations	6,369			6,661
Operating lease liabilities	24,343			—
Insurance reserves	19,358			15,198
Total current liabilities	407,734			296,179
Insurance reserves	43,506			41,270
Long-term debt	345,823			345,197
Long-term portion of finance lease obligations	9,832			8,845
Long-term portion of operating lease liabilities	107,498			—
Deferred income taxes	7,891			3,034
Other long-term liabilities	323			6,927
Total liabilities	922,607			701,452
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, 2019 and December 31, 2018	—			—
Common stock, $0.01 par value, 300.0 million shares authorized, 68.3 million and 67.7 million shares issued, and 66.8 million and 67.2 million outstanding at September 30, 2019 and December 31, 2018, respectively	683			677
Additional paid-in capital	683,460			672,095
Retained earnings	299,991			210,345
Treasury stock, at cost, 1.5 million and 0.5 million shares at September 30, 2019 and December 31, 2018, respectively	(26,553		)	(8,458		)
Total stockholders’ equity	957,581			874,659
Total liabilities and stockholders’ equity	$	1,880,188		$	1,576,111

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

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)	2019			2018			2019			2018
Net sales
Building products	$	728,465		$	773,787		$	2,061,766		$	2,201,863
Construction services	235,784			216,477			674,263			621,064
	964,249			990,264			2,736,029			2,822,927
Cost of sales
Building products	528,737			568,713			1,484,384			1,631,022
Construction services	180,745			180,248			534,979			511,919
	709,482			748,961			2,019,363			2,142,941
Gross profit	254,767			241,303			716,666			679,986

Selling, general and administrative expenses	189,284			176,204			540,649			506,236
Depreciation expense	10,501			10,059			30,117			29,323
Amortization expense	4,552			3,790			13,237			11,263
Merger and integration costs	1,295			1,459			5,467			3,627
Impairment of assets	115			—			644			—
	205,747			191,512			590,114			550,449
Income from operations	49,020			49,791			126,552			129,537
Other income (expense)
Interest expense	(5,773		)	(5,926		)	(17,385		)	(17,916		)
Other income, net	3,540			2,953			10,159			7,830
Income before income taxes	46,787			46,818			119,326			119,451
Income tax expense	13,190			10,960			29,680			27,829
Net income	$	33,597		$	35,858		$	89,646		$	91,622

Weighted average common shares outstanding
Basic	66,685			67,329			66,681			67,246
Diluted	67,361			67,896			67,240			67,743

Net income per common share
Basic	$	0.50		$	0.53		$	1.34		$	1.36
Diluted	$	0.50		$	0.53		$	1.33		$	1.35

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

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			Additional Paid-in Capital			Retained Earnings		Total
Stockholders’ equity as of December 31, 2017	67,286	$	673	207	$	(3,821	)	$	659,440		$	90,607	$	746,899
Exercise of stock options	55	1		—	—			587			—		588
Shares vested for long-term incentive plan	155	1		—	—			(1		)	—		—
Repurchases of common stock related to equity award activity	—	—		53	(1,046		)	—			—		(1,046		)
Share withholdings made in satisfaction of exercise price	—	—		1	(17		)	17			—		—
Stock compensation expense	—	—		—	—			1,775			—		1,775
Net income	—	—		—	—			—			15,359		15,359
Stockholders’ equity as of March 31, 2018	67,496	675		261	(4,884		)	661,818			105,966		763,575
Exercise of stock options	2	—		—	—			44			—		44
Shares vested for long-term incentive plan	65	1		—	—			(1		)	—		—
Repurchases of common stock related to equity award activity	—	—		5	(103		)	—			—		(103		)
Stock compensation expense	—	—		—	—			3,141			—		3,141
Net income	—	—		—	—			—			40,405		40,405
Stockholders’ equity as of June 30, 2018	67,563	676		266	(4,987		)	665,002			146,371		807,062
Exercise of stock options	35	—		—	—			649			—		649
Shares vested for long-term incentive plan	35	—		—	—			—			—		—
Repurchases of common stock related to equity award activity	—	—		10	(221		)	—			—		(221		)
Stock compensation expense	—	—		—	—			3,310			—		3,310
Net income	—	—		—	—			—			35,858		35,858
Stockholders’ equity as of September 30, 2018	67,633	$	676	276	$	(5,208	)	$	668,961		$	182,229	$	846,658

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

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

BMC STOCK HOLDINGS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)



	Nine Months Ended September 30,
(in thousands)	2019			2018
Cash flows from operating activities
Net income	$	89,646		$	91,622
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	39,722			37,297
Amortization of intangible assets	13,237			11,263
Amortization of debt issuance costs	1,124			1,263
Deferred income taxes	4,857			1,314
Non-cash stock compensation expense	9,177			8,226
Gain on sale of property, equipment and real estate	(1,839		)	(3,435		)
Other non-cash adjustments	2,314			686
Change in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of allowances	(24,068		)	(59,768		)
Inventories, net	(494		)	(41,883		)
Accounts payable	68,456			29,897
Other assets and liabilities	(3,715		)	34,156
Net cash provided by operating activities	198,417			110,638
Cash flows from investing activities
Purchases of businesses, net of cash acquired	(85,780		)	(20,970		)
Purchases of property, equipment and real estate	(67,582		)	(42,704		)
Proceeds from sale of property, equipment and real estate	4,444			10,968
Insurance proceeds	107			1,991
Net cash used in investing activities	(148,811		)	(50,715		)
Cash flows from financing activities
Proceeds from revolving line of credit	110,987			713,264
Repayments of proceeds from revolving line of credit	(110,987		)	(717,726		)
Repurchases of common stock under share repurchase program	(16,446		)	—
Payments on finance lease obligations	(5,094		)	(5,937		)
Principal payments on other notes	—			(75		)
Other financing activities, net	(5,530		)	(3,508		)
Net cash used in financing activities	(27,070		)	(13,982		)
Net increase in cash and cash equivalents	22,536			45,941
Cash and cash equivalents
Beginning of period	150,723			11,750
End of period	$	173,259		$	57,691

Supplemental disclosure of non-cash investing and financing transactions
Acquisition-related holdback payments due at future date	$	5,478		$	1,403
Acquisition-related post-closing adjustment receivable	951			—
Assets acquired under finance lease obligations	5,789			821

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

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, 2018 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, 2018 (“2018 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 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, 2019 and December 31, 2018, the Company had cash equivalents of $156.9 million and $146.1 million, respectively. 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”).

Share repurchase program

In November 2018, the Company’s board of directors authorized a $75.0 million share repurchase program, which was to expire on November 20, 2019. During October 2019, the Company’s board of directors authorized extending this share repurchase program for one year, such that it will expire on November 20, 2020. During the nine months ended September 30, 2019, utilizing cash from operations, the Company repurchased 1.0 million shares at a weighted average price of $17.11 per share for a total cost of $16.4 million. 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, 2019, the Company had approximately $55.7 million of capacity remaining under the current share repurchase authorization.

Statement of cash flows

Proceeds from revolving line of credit and repayments of proceeds from revolving line of credit as presented on the condensed consolidated statements of cash flows includes all cash activities and transactions between the Company and its associated lenders in relation to the revolving line of credit, excluding interest and fees, and is specifically inclusive of operating cash receipts that are automatically applied to the revolving line of credit pursuant to a cash sweep agreement. See Note 6 for further details on the Company’s revolving line of credit.

Prior Period Misstatement

During the three months ended June 30, 2019, the Company identified that a former credit manager within one of its local operations violated the Company’s credit policy by intentionally misapplying certain customer payments, both within a single customer balance as well as across multiple customer balances, and created inappropriate debit memos, all with the intent to manipulate the aging of certain unpaid customer invoices. These inappropriate activities resulted in an understatement of the Company’s provision for doubtful accounts in previously issued annual and interim financial statements (the “Prior Period Misstatement”). The Company

has corrected for such Prior Period Misstatement by recording, during the three months ended June 30, 2019 (which is included in the nine months ended September 30, 2019), an out of period bad debt expense of approximately $4.3 million in selling, general and administrative expenses and a corresponding decrease to accounts receivable, net of allowances. The Company has concluded that the financial impact of the Prior Period Misstatement is not material to any of its previously issued financial statements and that the correction of such Prior Period Misstatement is not material to either the nine months ended September 30, 2019 or to the expected financial results for the year ending December 31, 2019.

Recently adopted accounting pronouncements

In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2016-02, Leases, and issued subsequent amendments to the initial guidance to provide additional clarification on specific topics (“ASU 2016-02” or “Topic 842”). ASU 2016-02 establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the statement of operations. The Company adopted ASU 2016-02 on January 1, 2019 by recording ROU assets for its operating leases totaling approximately $110 million and corresponding lease liabilities totaling approximately $115 million. The impact of adopting ASU 2016-02 was not material to the Company’s results of operations or cash flows for the three and nine months ended September 30, 2019. See Note 5 for further details.

Recently issued accounting pronouncements not yet adopted

In June 2016, the 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 is effective for the Company’s annual and interim periods beginning on January 1, 2020, with early adoption permitted beginning January 1, 2019. Modified retrospective application is required, with certain exceptions. The Company expects to adopt the standard on January 1, 2020. The Company does not expect adoption of the standard to have a material impact on the Company’s allowance for financial instruments within the scope of the standard, including its trade receivables and contract assets. The Company continues to evaluate the disclosure requirements of the standard.

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 is 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. Early adoption is permitted for goodwill impairment tests performed on testing dates after January 1, 2017. Prospective application is required. The adoption of the standard is not expected to 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 is effective for the Company’s annual and interim periods beginning on January 1, 2020, with early adoption permitted. Certain disclosures in ASU 2018-13 are required to be applied prospectively, while others require retrospective application. The adoption of the standard is not expected to have a material impact on the Company’s consolidated financial statements.

3. 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.

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 “2019 Acquisitions”) enhance the Company’s value-added offerings and footprint in the respective metropolitan areas.

The preliminary purchase price, in aggregate, for the 2019 Acquisitions was $90.9 million. The preliminary purchase price includes holdbacks which, after certain post-closing adjustments, require the Company to pay $5.5 million, in aggregate, to the sellers of Barefoot, Kingston Lumber, Heritage One and Colorado Fasteners one year from the respective closing dates. The holdback amounts may be further reduced under certain circumstances. The Company funded the 2019 Acquisitions through available cash.

The preliminary purchase price allocation for the 2019 Acquisitions, in aggregate, resulted in the initial recognition of goodwill of $20.4 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 $14.7 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.

The purchase price allocations for the 2019 Acquisitions are preliminary and based upon all information available to the Company at the present time, and are subject to change. The Company is in the process of finalizing its valuation of the acquired intangible assets, property and equipment and inventory, and therefore, the initial purchase accounting for the 2019 Acquisitions is not complete. As the Company receives additional information during the measurement period, the fair values assigned to the assets and liabilities may be adjusted.

For the year ended December 31, 2018, the 2019 Acquisitions generated net sales, in aggregate, of approximately $199 million. The Company incurred transaction costs of $0.2 million and $0.5 million for the three and nine months ended September 30, 2019, respectively, related to the 2019 Acquisitions.

Net sales and estimated pre-tax earnings for the 2019 Acquisitions 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 2019 Acquisitions 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 2019 Acquisitions was not considered significant for the reporting of pro forma financial information.

2018 Acquisition

On March 1, 2018, the Company acquired substantially all of the assets and assumed certain liabilities of W.E. Shone Co. (“Shone Lumber”), a supplier of building materials in the state of Delaware, for a purchase price of $22.4 million. This acquisition enhances the Company’s value-added offerings and footprint in the Mid-Atlantic region. The purchase price included a holdback that, after certain post-closing adjustments, required the Company to pay $1.4 million to the sellers during the nine months ended September 30, 2019. The Company funded the transaction through available cash and borrowings on the Company’s revolving line of credit.

The purchase price allocation resulted in the recognition of goodwill of $2.5 million, a customer relationship intangible asset of $7.0 million, accounts receivable of $6.4 million, inventory of $8.8 million, property and equipment of $2.9 million and total current liabilities of $5.3 million, as well as other operating assets. The customer relationship intangible asset has a useful life of 9 years. 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 recognized is expected to be deductible for tax purposes.

Net sales and estimated pre-tax earnings for Shone Lumber included in the unaudited condensed consolidated statements of operations for the three months ended September 30, 2018 were $18.7 million and $0.8 million, respectively. Net sales and estimated pre-tax earnings for Shone Lumber included in the unaudited condensed consolidated statements of operations from the March 1, 2018 acquisition date to September 30, 2018 were $45.0 million and $2.8 million, respectively. The impact of the acquisition was not considered significant for the reporting of pro forma financial information.

4. Accounts Receivable

Accounts receivable consist of the following at September 30, 2019 and December 31, 2018:



(in thousands)	September 30, 2019			December 31, 2018
Trade receivables	$	358,388		$	305,363
Allowance for doubtful accounts	(11,214		)	(4,904		)
Other allowances	(2,529		)	(2,019		)
	$	344,645		$	298,440

5. Leases

Adoption of Topic 842

On January 1, 2019, the Company adopted Topic 842 by applying the guidance at adoption date. As a result, the comparative information as of December 31, 2018 and for the three and nine months ended September 30, 2018 has not been adjusted and continues to be reported under ASC 840, Leases (“ASC 840”). The Company elected the package of practical expedients permitted under the transition guidance within Topic 842, which allowed the Company to carry forward its identification of contracts that are or contain leases, its historical lease classification and its accounting for initial direct costs for existing leases. The impact of adopting Topic 842 was not material to the Company’s results of operations or cash flows for the three and nine months ended September 30, 2019.

Beginning January 1, 2019, the Company recognized ROU assets and lease liabilities for the Company’s operating leases on its unaudited condensed consolidated balance sheets. ROU assets for the Company’s operating leases are presented within operating lease right-of-use assets on the Company’s condensed consolidated balance sheets, while the lease liabilities for the Company’s operating leases are presented within operating lease liabilities, with a current and long-term portion. Upon adoption of Topic 842, the balances at the adoption date of prepaid and accrued rent, lease incentives and unamortized assets and liabilities related to favorable and unfavorable leases were reclassified and are now presented within operating lease right-of-use assets on the Company’s condensed consolidated balance sheets. Refer to further discussion of the Company’s ROU assets and lease liabilities below. The Company’s accounting for its historical capital leases, which are now presented as finance leases under Topic 842, remained substantially unchanged.

Lease Arrangements

The Company has operating and finance leases primarily for its facilities, office space, land, fleet vehicles and equipment. Many of the Company’s leases are noncancellable and typically have an initial lease term of five to ten years, and most provide options at the Company’s election to renew for specified periods of time. The Company’s leases generally provide for fixed annual rentals. Certain of the Company’s leases include provisions for escalating rent, as an example, based on changes in the consumer price index. Variable lease payments based on an index or rate are initially measured using the index or rate in effect at lease commencement. Most of the Company’s leases require it to pay taxes, insurance and maintenance expenses associated with the properties. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants.

The Company determines if an arrangement contains a lease at inception. The Company has lease agreements with lease and non-lease components, which for all such leases are generally accounted for separately. The Company has elected the short-term lease exception under Topic 842 for all leases and as such, leases with an initial term of 12 months or less are not recorded on the

unaudited condensed consolidated balance sheets. The Company recognizes lease expense for short-term leases on a straight-line basis over the lease term.

Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As the Company’s leases generally do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives and any initial direct costs incurred. The Company’s lease terms include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.

Leases

The components of lease cost for the three and nine months ended September 30, 2019 were as follows:



(in thousands)	Classification	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
Operating lease cost (a)	Selling, general and administrative expenses	$	9,921	$	29,181

Finance lease cost
Amortization of ROU assets	Depreciation expense	$	1,676	$	4,971
Interest on lease liabilities	Interest expense	156		492
Total finance lease cost		$	1,832	$	5,463

(a) Includes short-term leases and variable lease costs, which are not material.

The Company subleases certain facilities to third parties. Income from sublease rentals for the three and nine months ended September 30, 2019 was not material.

The following table presents the Company’s right-of-use assets and lease liabilities as of September 30, 2019:



(in thousands)	Classification	September 30, 2019
Assets
Operating lease right-of-use assets	Operating lease right-of-use assets	$	125,093
Finance lease right-of-use assets (a)	Property and equipment, net of accumulated depreciation	18,064
Total leased right-of-use assets		$	143,157
Liabilities
Current portion
Operating lease liabilities	Current portion of operating lease liabilities	$	24,343
Finance lease liabilities	Current portion of long-term debt and finance lease obligations	6,369
Noncurrent portion
Operating lease liabilities	Long-term portion of operating lease liabilities	107,498
Finance lease liabilities	Long-term portion of finance lease obligations	9,832
Total lease liabilities		$	148,042

(a) Finance lease right-of-use assets are presented net of accumulated amortization of $42.9 million as of September 30, 2019.

The following table presents the weighted average remaining lease term and weighted average discount rate for the Company’s leases as of September 30, 2019:



	September 30, 2019
Weighted average remaining lease term (years)
Operating leases	6.0
Finance leases	4.8
Weighted average discount rate
Operating leases	6.4	%
Finance leases	5.0	%

Future maturities of lease liabilities as of September 30, 2019 were as follows:



(in thousands)	Operating Leases			Finance Leases			Total
2019 (a)	$	8,111		$	1,881		$	9,992
2020	31,277			6,245			37,522
2021	29,213			3,040			32,253
2022	26,056			1,574			27,630
2023	22,720			1,379			24,099
Thereafter	43,000			4,398			47,398
Total lease payments	160,377			18,517			178,894
Less: Interest	(28,536		)	(2,316		)	(30,852		)
Present value of lease liabilities	$	131,841		$	16,201		$	148,042

(a) Excludes the nine months ended September 30, 2019.

As of September 30, 2019, the Company had additional leases for a facility and two office spaces that have not yet commenced, as the facility and office spaces have not yet been made available to the Company. The facility and two office space leases are expected to commence in 2019 and 2020 and contain undiscounted lease payments of $15.8 million in aggregate over the terms of the leases, which range from 5 to 10 years. These payments are not included in the table above.

Cash paid for amounts included in the measurement of lease liabilities and right-of-use assets obtained in exchange for lease obligations during the nine months ended September 30, 2019 were as follows:



(in thousands)	Nine Months Ended September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	24,086
Operating cash flows from finance leases	485
Financing cash flows from finance leases	5,094
Right-of-use assets obtained in exchange for lease obligations
Operating leases	$	34,836
Finance leases	5,789

Disclosures related to periods prior to adoption of Topic 842

As previously discussed, the Company adopted Topic 842 by applying the guidance at the adoption date, January 1, 2019. As required, the following disclosure is provided for periods prior to adoption, which continue to be presented in accordance with ASC 840.

Future minimum lease payments under noncancellable operating leases (with initial or remaining lease terms in excess of one year) and future minimum capital lease payments as of December 31, 2018 are as follows:



(in thousands)	Capital Leases			Operating Leases
2019	$	7,245		$	30,431
2020	5,599			24,210
2021	2,356			21,551
2022	873			17,908
2023	660			14,607
Thereafter	—			34,279
	16,733			$	142,986	(a)
Less: Amounts representing interest	(1,227		)
Total obligation under capital leases	15,506
Less: Current portion of capital lease obligation	(6,661		)
Long-term capital lease obligation	$	8,845

(a) Minimum operating lease payments have not been reduced by minimum sublease rentals of $0.1 million due in the future under noncancellable subleases.

6. Debt

Long-term debt as of September 30, 2019 and December 31, 2018 consists of the following:



(in thousands)	September 30, 2019			December 31, 2018
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	(4,177		)	(4,803		)
	345,823			345,197
Less: Current portion of long-term debt	—			—
	$	345,823		$	345,197

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, 2019, the estimated market value of the Senior Notes was approximately $14.4 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 (as amended by the first and second amendments, the “Existing Credit Agreement”), which includes a revolving line of credit (the “Revolver”). On May 31, 2019, the Company entered into the third amendment to the Existing Credit Agreement (the “Third Amendment”), which amended and restated the Existing Credit Agreement (the “Credit Agreement”) and increased the aggregate commitment from $375.0 million to $425.0 million. The Company had no outstanding borrowings under the Revolver and net availability of $367.8 million as of September 30, 2019. The Company had $56.1 million in letters of credit outstanding under the Credit Agreement as of September 30, 2019.

The Credit Agreement matures at the earlier of (i) May 31, 2024 or (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 effective maturity date of the Revolver was extended from December 1, 2020, the effective maturity date of the Existing Credit Agreement, to May 31, 2024. After considering the increase to the remaining term and the increase in the aggregate commitment resulting from the Third Amendment, the overall borrowing capacity of the Revolver increased. Accordingly, all existing unamortized debt issuance costs and new debt issuance costs related to the Third Amendment are being amortized through May 31, 2024.

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, 2019 and 2018:



	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2019		2018		2019		2018
Structural components	$	175,344	$	166,919	$	483,575	$	470,365
Lumber & lumber sheet goods	274,908		357,286		798,722		1,013,495
Millwork, doors & windows	285,750		251,606		796,807		730,318
Other building products & services	228,247		214,453		656,925		608,749
Total net sales	$	964,249	$	990,264	$	2,736,029	$	2,822,927

The following table reflects the Company’s estimate of net sales by each customer type for the three and nine months ended September 30, 2019 and 2018. Certain previously reported amounts for the three and nine months ended September 30, 2018 were revised in the table below. The revisions were not material to the previously issued financial statements.



	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2019		2018		2019		2018
Single-family homebuilders	$	718,690	$	760,131	$	2,064,382	$	2,163,784
Remodeling contractors	115,756		113,416		314,277		327,700
Multi-family, commercial & other contractors	129,803		116,717		357,370		331,443
Total net sales	$	964,249	$	990,264	$	2,736,029	$	2,822,927

Contract balances

The following table reflects the Company’s contract balances as of September 30, 2019 and December 31, 2018:



(in thousands)	September 30, 2019		December 31, 2018		Change
Receivables, including unbilled receivables presented in prepaid expenses and other current assets	$	353,992	$	306,370	$	47,622
Contract assets	36,759		32,348		4,411
Contract liabilities	$	34,501	$	34,888	$	(387	)

During the nine months ended September 30, 2019, the Company’s contract assets increased by $4.4 million and the Company’s contract liabilities decreased by $0.4 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, 2019, the Company recognized revenue of $0.9 million and $32.0 million, respectively, that was included in contract liabilities as of December 31, 2018. 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, 2019.

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 $0.1 million against its deferred tax assets related to certain state tax jurisdictions as of September 30, 2019 and December 31, 2018. 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, 2019 and December 31, 2018.

During the three and nine months ended September 30, 2019, the Company recorded an out of period expense of $1.6 million and $1.5 million, respectively, in Income tax expense and a corresponding increase to Income taxes payable to correct for a misstatement related to its calculation of excess windfall tax benefits on stock option exercises in certain prior periods (the “Income Tax Adjustment”). The Company has concluded that the financial impact of the Income Tax Adjustment is not material to any of its previously issued financial statements and that the correction of such Income Tax Adjustment is not material to either the three or nine months ended September 30, 2019 or to the expected financial results for the year ending December 31, 2019.

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 the Income Tax Adjustment. Excluding the Income Tax Adjustment, the Company’s effective tax rate was 24.7% and 23.6% for the three and nine months ended September 30, 2019, respectively. For the three and nine months ended September 30, 2018, the Company’s effective tax rate was 23.4% and 23.3%, respectively, which varied from the federal statutory rate of 21% primarily due to state income taxes.

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. As of December 31, 2018, the Company had accrued $3.0 million in relation to pending litigation that was recorded during the year ended December 31, 2017. During the nine months ended September 30, 2019, the Company paid $2.8 million to settle the matter.

10. Stock Based Compensation

The following table highlights the expense related to stock based compensation for the three and nine months ended September 30, 2019 and 2018:



	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2019		2018		2019		2018
Restricted stock units (a)	$	3,014	$	3,281	$	9,177	$	8,049
Restricted stock	—		2		—		100
Stock options	—		27		—		77
Stock based compensation	$	3,014	$	3,310	$	9,177	$	8,226

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

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.

During the three and nine months ended September 30, 2018, the Company granted 0.1 million and 0.7 million service-based restricted stock unit awards, respectively. In addition, during the three and nine months ended September 30, 2018, the Company granted performance-based restricted stock units that allow for a maximum of 0.2 million and 0.5 million performance-based restricted stock units to be earned, respectively.

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, 2019 and 2018. Adjusted EBITDA is used as a performance metric by the CODM in determining how to allocate resources and assess performance. For the nine months ended September 30, 2019, Adjusted EBITDA for the Geographic divisions reportable segment includes the out of period correction of the Prior Period Misstatement of $4.3 million.



	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



	Three Months Ended September 30, 2018
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	990,264	$	241,303	$	16,106	$	92,698
Other reconciling items	—		—		520		(18,330		)
	$	990,264	$	241,303	$	16,626



	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



	Nine Months Ended September 30, 2018
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA
Geographic divisions	$	2,822,927	$	679,986	$	47,079	$	252,873
Other reconciling items	—		—		1,481		(52,496		)
	$	2,822,927	$	679,986	$	48,560

Reconciliation to consolidated financial statements:



	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2019			2018			2019			2018
Income before income taxes	$	46,787		$	46,818		$	119,326		$	119,451
Interest expense	5,773			5,926			17,385			17,916
Interest income	(1,047		)	(117		)	(2,832		)	(117		)
Depreciation and amortization	18,535			16,626			52,959			48,560
Merger and integration costs	1,295			1,459			5,467			3,627
Non-cash stock compensation expense	3,014			3,310			9,177			8,226
Impairment of assets	115			—			644			—
Acquisition costs	229			—			827			267
Sale of Coleman Floor (a)	(43		)	—			(344		)	—
Other items (b)	—			346			(222		)	2,447
Adjusted EBITDA of other reconciling items	22,094			18,330			58,150			52,496
Adjusted EBITDA of geographic divisions reportable segment	$	96,752		$	92,698		$	260,537		$	252,873

(a) Represents the effect of certain customary post-closing adjustments related to the November 1, 2018 disposition of the Company’s Coleman Floor business (“Coleman Floor”).

(b) 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 less than what was previously accrued. See Note 9 for further details on the settlement of pending litigation. For the three and nine months ended September 30, 2018, represents costs incurred in connection with the departure of the Company’s former chief executive officer and the search for and appointment of his permanent replacement.

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, restricted stock 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, 2019 and 2018 are presented below:



	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share amounts)	2019		2018		2019		2018
Income attributable to common stockholders	$	33,597	$	35,858	$	89,646	$	91,622

Weighted average common shares outstanding, basic	66,685		67,329		66,681		67,246
Effect of dilutive securities:
Restricted stock units (a)	544		399		450		321
Stock options	132		166		109		155
Restricted stock	—		2		—		21
Weighted average common shares outstanding, diluted	67,361		67,896		67,240		67,743

Basic income per common share	$	0.50	$	0.53	$	1.34	$	1.36
Diluted income per common share	$	0.50	$	0.53	$	1.33	$	1.35

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

For the three and nine months ended September 30, 2019 and 2018, there were no anti-dilutive restricted stock units, stock options or restricted stock. As of September 30, 2019, 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.

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 2018 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. 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 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;


•	the impact of our indebtedness; and


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

Certain of these and other factors are discussed in more detail in “Item 1A. Risk Factors” of our 2018 Annual Report on Form 10-K, as supplemented in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2019. 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 2018 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, 2019 decreased 2.6% compared to the prior year period. Our gross profit as a percentage of sales (“gross margin”) was 26.4% for the three months ended September 30, 2019 compared to 24.4% for the prior year period. We recorded income from operations of $49.0 million during the three months ended September 30, 2019 compared to $49.8 million during the three months ended September 30, 2018. See further discussion in “-Operating Results” below.

Factors Affecting Our Operating Results

Our operating results and financial performance are influenced by a variety of factors, including, among others, acquisitions, conditions in the housing market and economic conditions generally, 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 2018 Annual Report on Form 10-K, as supplemented by the additional discussion below.

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, 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, 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 preliminary purchase price, in aggregate, for the 2019 Acquisitions was $90.9 million.

On March 1, 2018, the Company acquired substantially all of the assets and assumed certain liabilities of Shone Lumber, a supplier of building materials in the state of Delaware, for a purchase price of $22.4 million.

The 2019 Acquisitions increased sales approximately $38.7 million for the three months ended September 30, 2019, compared to the prior year period, while the 2019 Acquisitions and Shone Lumber acquisition increased sales approximately $93.1 million for the nine months ended September 30, 2019, compared to the prior year period.

See Note 3 to the unaudited condensed consolidated financial statements included in Item 1 of this Quarterly Report on Form 10-Q for further discussion of the 2019 Acquisitions and acquisition of Shone Lumber.

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 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 5.1% for the three months ended September 30, 2019 compared to the same period in the prior year.

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,
	2019 versus 2018		2019 average price		2019 versus 2018		2019 average price
Framing lumber prices	(23.6	)%	$	357	(29.0	)%	$	353
Structural panel prices	(30.2	)%	$	337	(31.1	)%	$	353

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. 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.

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.

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)	2019					2018					2019					2018
Net sales	$	964,249		100.0	%	$	990,264		100.0	%	$	2,736,029		100.0	%	$	2,822,927		100.0	%
Cost of sales	709,482			73.6	%	748,961			75.6	%	2,019,363			73.8	%	2,142,941			75.9	%
Gross profit	254,767			26.4	%	241,303			24.4	%	716,666			26.2	%	679,986			24.1	%
Operating expenses:
Selling, general and administrative expenses	189,284			19.6	%	176,204			17.8	%	540,649			19.8	%	506,236			17.9	%
Depreciation expense	10,501			1.1	%	10,059			1.0	%	30,117			1.1	%	29,323			1.0	%
Amortization expense	4,552			0.5	%	3,790			0.4	%	13,237			0.5	%	11,263			0.4	%
Merger and integration costs	1,295			0.1	%	1,459			0.1	%	5,467			0.2	%	3,627			0.1	%
Impairment of assets	115			0.0	%	—			0.0	%	644			0.0	%	—			0.0	%
Income from operations	49,020			5.1	%	49,791			5.0	%	126,552			4.6	%	129,537			4.6	%
Other income (expense)
Interest expense	(5,773		)	(0.6	)%	(5,926		)	(0.6	)%	(17,385		)	(0.6	)%	(17,916		)	(0.6	)%
Other income, net	3,540			0.4	%	2,953			0.3	%	10,159			0.4	%	7,830			0.3	%
Income before income taxes	46,787			4.9	%	46,818			4.7	%	119,326			4.4	%	119,451			4.2	%
Income tax expense	13,190			1.4	%	10,960			1.1	%	29,680			1.1	%	27,829			1.0	%
Net income	$	33,597		3.5	%	$	35,858		3.6	%	$	89,646		3.3	%	$	91,622		3.2	%

Three months ended September 30, 2019 compared to three months ended September 30, 2018

Net sales

For the three months ended September 30, 2019, net sales decreased $26.0 million, or 2.6%, to $964.2 million from $990.3 million during the three months ended September 30, 2018. We estimate that net sales decreased 10.5% from price deflation within the lumber and lumber sheet goods and structural components product categories and 1.1% from the disposition of Coleman Floor, partially offset by an increase of 3.9% from the 2019 Acquisitions, 1.5% from an additional selling day versus the prior year period and 3.6% from other organic growth.

We estimate approximately 75% of our net sales for the three months ended September 30, 2019 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 5.1% for the three months ended September 30, 2019 compared to the same period in the prior year, while single-family houses completed increased approximately 5.0% during the same period. We estimate that net sales to single-family homebuilders and remodeling contractors declined 4.5% in the aggregate and net sales to multi-family, commercial and other contractors increased 11.2%.

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



	Three Months Ended September 30, 2019				Three Months Ended September 30, 2018
(in thousands)	Net Sales		% of Sales		Net Sales		% of Sales		% Change
Structural components	$	175,344	18.2	%	$	166,919	16.9	%	5.0	%
Lumber & lumber sheet goods	274,908		28.5	%	357,286		36.1	%	(23.1	)%
Millwork, doors & windows	285,750		29.6	%	251,606		25.4	%	13.6	%
Other building products & services	228,247		23.7	%	214,453		21.6	%	6.4	%
Total net sales	$	964,249	100.0	%	$	990,264	100.0	%	(2.6	)%

Cost of sales

For the three months ended September 30, 2019, cost of sales decreased $39.5 million, or 5.3%, to $709.5 million from $749.0 million during the three months ended September 30, 2018. We estimate our cost of sales decreased approximately 11.1% as a result of commodity cost deflation and 1.1% from the disposition of Coleman Floor, partially offset by an increase of 3.8% from the 2019 Acquisitions, 1.5% from an additional selling day versus the prior year period and 1.6% from other organic growth.

Gross profit

For the three months ended September 30, 2019, gross profit increased $13.5 million, or 5.6%, to $254.8 million from $241.3 million for the three months ended September 30, 2018, driven primarily by the 2019 Acquisitions and other organic growth, partially offset by commodity price decreases. Our gross margin was 26.4% for the three months ended September 30, 2019 and 24.4% for the three months ended September 30, 2018. This increase was primarily due to an increase in the gross margin in our lumber and lumber sheet goods and structural components product categories of 210 basis points and 160 basis points, respectively. Gross margins in our lumber and lumber sheet goods and structural components product categories were higher due to a significant decrease in commodity costs during the three months ended September 30, 2019 compared to the prior year period, which decreased at a faster rate than our average selling prices.

Operating expenses

For the three months ended September 30, 2019:

•

selling, general and administrative expenses were $189.3 million, up $13.1 million, or 7.4%, from $176.2 million for the three months ended September 30, 2018. Approximately $6.7 million of this increase related to selling, general and administrative expenses of the 2019 Acquisitions, $5.2 million of this increase related to employee wages and benefits and $2.0 million of this increase related to gains on sale of property, equipment and real estate during the prior year period, partially offset by a decrease of $0.8 million in other selling, general and administrative categories.


•	depreciation expense was $10.5 million compared to $10.1 million for the three months ended September 30, 2018.


•	amortization expense was $4.6 million compared to $3.8 million for the three months ended September 30, 2018. This increase resulted from the amortization of intangible assets acquired in the 2019 Acquisitions.


•	the Company incurred $1.3 million of Merger and integration costs related to the ongoing integration of Building Materials Holding Corporation (“BMHC”) and Stock Building Supply Holdings, Inc. (“SBS”), consisting primarily of system integration costs, compared to $1.5 million for the three months ended September 30, 2018.


•	the Company recognized asset impairment charges of $0.1 million related to the relocation of the operations of one of the Company’s facilities.

Interest expense

For the three months ended September 30, 2019 and 2018, interest expense was $5.8 million and $5.9 million, respectively. Non-cash amortization of debt issuance costs, which is included in interest expense, was $0.3 million and $0.4 million for the three months ended September 30, 2019 and 2018, respectively.

Other income, net

For the three months ended September 30, 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 $3.5 million, compared to $3.0 million for the three months ended September 30, 2018. This increase was primarily due to an increase in interest income.

Income tax

For the three months ended September 30, 2019, income tax expense was $13.2 million compared to $11.0 million for the three months ended September 30, 2018. 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 the out of period Income Tax Adjustment (see Note 8). Excluding the Income Tax Adjustment, the Company’s effective tax rate was 24.7% for the three months ended September 30, 2019. The effective tax rate for the three months ended September 30, 2018 was 23.4%, which varied from the federal statutory rate of 21% primarily due to state income taxes.

Nine months ended September 30, 2019 compared to nine months ended September 30, 2018

Net sales

For the nine months ended September 30, 2019, net sales decreased $86.9 million, or 3.1%, to $2,736.0 million from $2,822.9 million during the nine months ended September 30, 2018. We estimate that net sales decreased 7.9% from price deflation within the lumber and lumber sheet goods and structural components product categories and 1.1% from the disposition of Coleman Floor, partially offset by an increase of 3.3% from the 2019 Acquisitions and Shone Lumber acquisition and 2.6% from other organic growth.

We estimate approximately 76% of our net sales for the nine months ended September 30, 2019 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, declined approximately 0.6% for the nine months ended September 30, 2019 as compared to the same period in the prior year, while single-family houses completed increased approximately 5.5% during the same period. We estimate that net sales to single-family homebuilders and remodeling contractors declined 4.5% in the aggregate and net sales to multi-family, commercial and other contractors increased 7.8%.

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



	Nine Months Ended September 30, 2019				Nine Months Ended September 30, 2018
(in thousands)	Net Sales		% of Sales		Net Sales		% of Sales		% Change
Structural components	$	483,575	17.7	%	$	470,365	16.7	%	2.8	%
Lumber & lumber sheet goods	798,722		29.2	%	1,013,495		35.9	%	(21.2	)%
Millwork, doors & windows	796,807		29.1	%	730,318		25.9	%	9.1	%
Other building products & services	656,925		24.0	%	608,749		21.5	%	7.9	%
Total net sales	$	2,736,029	100.0	%	$	2,822,927	100.0	%	(3.1	)%

The decrease in net sales in our lumber and lumber sheet goods product category was primarily related to price deflation that began in the second half of 2018. The increase in net sales in our millwork, doors and windows product category was primarily related to the 2019 Acquisitions and Shone Lumber acquisition and other organic growth. The increase in net sales in our other building products and services product category was primarily related to the 2019 Acquisitions and Shone Lumber acquisition and an increase in net sales in our multi-family customer segment.

Cost of sales

For the nine months ended September 30, 2019, cost of sales decreased $123.6 million, or 5.8%, to $2,019.4 million from $2,142.9 million during the nine months ended September 30, 2018. We estimate our cost of sales decreased approximately 9.2% as a result of commodity cost deflation and 1.2% from the disposition of Coleman Floor, partially offset by an increase of 3.2% from the 2019 Acquisitions and Shone Lumber acquisition and 1.4% from other organic growth.

Gross profit

For the nine months ended September 30, 2019, gross profit increased $36.7 million, or 5.4%, to $716.7 million from $680.0 million for the nine months ended September 30, 2018, driven primarily by the 2019 Acquisitions and Shone Lumber acquisition and other organic growth, partially offset by commodity price decreases. Our gross margin was 26.2% for the nine months ended September 30, 2019 and 24.1% for the nine months ended September 30, 2018. This increase was primarily due to an increase in the gross margin in our lumber and lumber sheet goods and structural components product categories of 280 basis points and 330 basis points, respectively. Gross margins in our lumber and lumber sheet goods and structural components product categories were higher due to a significant decrease in commodity costs during the nine months ended September 30, 2019 as compared to the prior year period, which decreased at a faster rate than our average selling prices.

Operating expenses

For the nine months ended September 30, 2019:

•

selling, general and administrative expenses were $540.6 million, up $34.4 million, or 6.8%, from $506.2 million for the nine months ended September 30, 2018. Excluding the $4.3 million impact of the out of period correction of the Prior Period Misstatement (see Note 2), selling, general and administrative expenses increased $30.1 million. Approximately $16.5 million of this increase related to selling, general and administrative expenses of the 2019 Acquisitions and Shone Lumber acquisition and $4.6 million of this increase related to increased health care costs. The remaining increase was primarily related to employee wage inflation.


•	depreciation expense was $30.1 million compared to $29.3 million for the nine months ended September 30, 2018.


•	amortization expense was $13.2 million compared to $11.3 million for the nine months ended September 30, 2018. This increase resulted from the amortization of intangible assets acquired in the 2019 Acquisitions and Shone Lumber acquisition.

•

the Company incurred $5.5 million of Merger and integration costs related to the ongoing integration of BMHC and SBS, consisting primarily of system integration costs and non-cash charges related to the write-down of certain long-lived assets, compared to $3.6 million for the nine months ended September 30, 2018. Merger and integration costs for the nine months ended September 30, 2018 also included a gain from disposition of property due to the integration.


•	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, 2019 and 2018, interest expense was $17.4 million and $17.9 million, respectively. This decrease related primarily to reduced borrowings under the Revolver. Non-cash amortization of debt issuance costs, which is included in interest expense, was $1.1 million and $1.3 million for the nine months ended September 30, 2019 and 2018, respectively.

Other income, net

For the nine months ended September 30, 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 $10.2 million, compared to $7.8 million for the nine months ended September 30, 2018. This increase was primarily due to an increase in interest income.

Income tax

For the nine months ended September 30, 2019, income tax expense was $29.7 million compared to $27.8 million for the nine months ended September 30, 2018. 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 the out of period Income Tax Adjustment (see Note 8). Excluding the Income Tax Adjustment, the Company’s effective tax rate was 23.6% for the nine months ended September 30, 2019. The effective tax rate for the nine months ended September 30, 2018 was 23.3%, which varied from the federal statutory rate of 21% primarily due to state income taxes.

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 2019 and 2018, our capital resources have primarily consisted of cash and cash equivalents generated through operating cash flows and borrowings under our Revolver.

Our liquidity at September 30, 2019 was $541.1 million, which included $173.3 million in cash and cash equivalents and $367.8 million of unused borrowing capacity under our Revolver.

We believe that our cash flows from operations, combined with our current cash levels and available borrowing capacity, will be adequate to fund debt service requirements and provide cash, as required, to support our ongoing operations, capital expenditures, lease obligations, working capital and any share repurchase activity for at least the next 12 months.

for one year, such that it will expire on November 20, 2020. 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 may be suspended or discontinued at any time. The Company repurchased 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.

Historical Cash Flow Information

Net current assets

Net current assets (current assets less current liabilities) were $537.8 million and $550.9 million as of September 30, 2019 and December 31, 2018, respectively, as summarized in the following table:



(in thousands)	September 30, 2019			December 31, 2018
Cash and cash equivalents	$	173,259		$	150,723
Accounts receivable, net of allowances	344,645			298,440
Inventories, net	324,458			309,279
Other current assets	103,166			88,597
Accounts payable, accrued expenses and other current liabilities	(377,022		)	(289,518		)
Current portion of long-term debt and finance lease obligations	(6,369		)	(6,661		)
Current portion of operating lease liabilities (a)	(24,343		)	—
Total net current assets	$	537,794		$	550,860

(a) Effective January 1, 2019, as part of the Company’s adoption of Topic 842, the Company has recognized ROU assets and lease liabilities for the Company’s operating leases on its unaudited condensed consolidated balance sheets. See Note 5 to the unaudited condensed consolidated financial statements included in Item 1 of this Quarterly Report on Form 10-Q for a discussion of the Company’s adoption of Topic 842.

Accounts receivable, net of allowances, increased $46.2 million from December 31, 2018 to September 30, 2019 primarily due to seasonal increases in sales and the 2019 Acquisitions. Days sales outstanding (measured against net sales in the current fiscal quarter of each period), increased from 31 days at December 31, 2018 to 32 days at September 30, 2019.

Inventories, net of allowances, increased $15.2 million from December 31, 2018 to September 30, 2019 primarily due to seasonal increases in inventory purchases and the 2019 Acquisitions. Inventory days on hand (measured against cost of sales in the current fiscal quarter of each period) decreased from 44 days at December 31, 2018 to 41 days at September 30, 2019.

Accounts payable, accrued expenses and other current liabilities increased $87.5 million from December 31, 2018 to September 30, 2019 primarily due to the timing of vendor payments and an increase in accounts payable related to increased inventory purchases in connection with higher sales volume.

Cash flows from operating activities

Net cash provided by operating activities was $198.4 million and $110.6 million for the nine months ended September 30, 2019 and 2018, respectively, as summarized in the following table:



	Nine Months Ended September 30,
(in thousands)	2019		2018
Net income	$	89,646	$	91,622
Non-cash expenses	63,735		55,300
Change in deferred income taxes	4,857		1,314
Change in working capital and other assets and liabilities	40,179		(37,598		)
Net cash provided by operating activities	$	198,417	$	110,638

Net cash provided by operating activities increased by $87.8 million for the nine months ended September 30, 2019 compared to the nine months ended September 30, 2018. This increase was primarily related to changes in working capital and other assets and liabilities. Changes in working capital and other assets and liabilities, which relate primarily to the timing of cash received from customers and cash paid to vendors, increased primarily due to a decrease in days sales outstanding at the end of each period, commodity price deflation and the timing of vendor payments.

Cash flows from investing activities

Net cash used in investing activities was $148.8 million and $50.7 million for the nine months ended September 30, 2019 and 2018, respectively, as summarized in the following table:



	Nine Months Ended September 30,
(in thousands)	2019			2018
Purchases of businesses, net of cash acquired	$	(85,780	)	$	(20,970	)
Purchases of property, equipment and real estate	(67,582		)	(42,704		)
Proceeds from sale of property, equipment and real estate	4,444			10,968
Insurance proceeds	107			1,991
Net cash used in investing activities	$	(148,811	)	$	(50,715	)

Purchases of businesses, net of cash acquired, for the nine months ended September 30, 2019 related to the cash paid at closing for the 2019 Acquisitions and for the nine months ended September 30, 2018, related to the cash paid at closing for the acquisition of Shone Lumber.

Cash used for the purchase of property, equipment and real estate for the nine months ended September 30, 2019 and 2018 resulted primarily from the purchase of vehicles and equipment to support increased sales volume and replace aged assets, and facility and technology investments to support our operations.

Proceeds from the sale of property, equipment and real estate during the nine months ended September 30, 2019 and 2018 related primarily to the sale of real estate of $3.6 million and $10.2 million, respectively.

During the nine months ended September 30, 2019 and 2018, 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 $27.1 million and $14.0 million for the nine months ended September 30, 2019 and 2018, respectively, as summarized in the following table:



	Nine Months Ended September 30,
(in thousands)	2019			2018
Repurchases of common stock under share repurchase program	$	(16,446	)	$	—
Payments on finance lease obligations and other notes	(5,094		)	(6,012		)
Net repayments of proceeds from Revolver	—			(4,462		)
Other financing activities, net	(5,530		)	(3,508		)
Net cash used in financing activities	$	(27,070	)	$	(13,982	)

The Company repurchased 1.0 million shares under the $75.0 million share repurchase program authorized by the Company’s board of directors 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.

Payments on finance lease obligations and other notes declined by $0.9 million for the nine months ended September 30, 2019 compared to the nine months ended September 30, 2018 due primarily to expiring leases.

The Company made net repayments of $4.5 million on the Revolver during the nine months ended September 30, 2018. The net repayments during the nine months ended September 30, 2018 were the result of aggregate payments under the Revolver, partially offset by borrowings to fund the acquisition of Shone Lumber.

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 and restricted stock unit awards. For the nine months ended September 30, 2019, other financing activities, net also included the release of the holdbacks for the Shone Lumber and Barefoot acquisitions, the payment of the earnout provision for the Code Plus Components, LLC (“Code Plus”) acquisition and payments of debt issuance costs related to the Third Amendment. For the nine months ended September 30, 2018, other financing activities, net also included the release of the holdback for the Code Plus acquisition.

Capital expenditures

Capital expenditures vary depending on prevailing business factors, including current and anticipated market conditions. We expect our 2019 capital expenditures, net of proceeds from the sale of property, equipment and real estate, to be approximately $80.0 million to $90.0 million primarily related to vehicles and equipment, including lease buyouts, to replace aged assets and support increased sales volume, and facility and technology investments to support our operations. For the nine months ended September 30, 2019, capital expenditures, net of proceeds from the sale of property, equipment and real estate, were $63.1 million.

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 equityholders, 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, 2019.

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 Existing Credit Agreement, which includes the Revolver, was amended on May 31, 2019 when the Company entered into the Third Amendment. The Third Amendment increased the aggregate commitment from $375.0 million to $425.0 million. The Credit Agreement has 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 equityholders, 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 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, 2019. We were in compliance with all covenants under the Credit Agreement as of September 30, 2019.

We had no outstanding borrowings with net availability of $367.8 million as of September 30, 2019. We had $56.1 million in letters of credit outstanding under the Credit Agreement as of September 30, 2019.

Contractual Obligations and Commercial Commitments

The Company was obligated under certain purchase commitments totaling approximately $15.5 million at September 30, 2019 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, 2019 and December 31, 2018, 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

Except for our accounting policies impacted by our adoption of Topic 842, there have been no material changes to the critical accounting policies as disclosed in the Company’s 2018 Annual Report on Form 10-K. See Note 5 to the unaudited condensed consolidated financial statements included in Item 1 of this Quarterly Report on Form 10-Q for a discussion of the changes to the critical accounting policies resulting from our adoption of Topic 842.

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 2018 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 not effective as of September 30, 2019 as a result of the previously identified material weakness in internal control over financial reporting described below.

Notwithstanding the material weakness described below, management has concluded that our condensed consolidated financial statements included in this Quarterly Report on Form 10-Q were not materially misstated and present fairly, in all material respects, the condensed consolidated financial position, results of operations and cash flows of the registrant as of, and for the periods presented in this report.

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.

Previously identified material weakness in internal control over financial reporting

In connection with the preparation of our condensed consolidated financial statements for the three and six months ended June 30, 2019, management identified that a former credit manager within one of our local operations violated our credit policy by intentionally misapplying certain customer payments, both within a single customer balance as well as across multiple customer balances, and created inappropriate debit memos, all with the intent to manipulate the aging of certain unpaid customer invoices. The inappropriate activities resulted in an immaterial understatement of our provision for doubtful accounts in previously issued annual and interim financial statements.

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of annual or interim financial statements would not be prevented or detected on a timely basis.

We identified a design deficiency with respect to effective controls over the approval and issuance of debit memos and the application of customer payments to accounts receivable balances, and inadequate segregation of duties over the ability to create debit memos and apply customer payments by certain employees responsible for establishing and monitoring the valuation of accounts receivable balances. Management concluded these deficiencies constituted a material weakness in our internal control over financial reporting.

The material weakness resulted in immaterial misstatements to our previously issued interim and annual consolidated financial statements impacting selling, general and administrative expenses and accounts receivable, net of allowances. We corrected for the Prior Period Misstatement by recording in the three months ended June 30, 2019 an out of period bad debt expense of approximately $4.3 million in selling, general and administrative expenses and a corresponding decrease to accounts receivable, net of allowances.

Remediation plan for material weakness

With the oversight of the Audit Committee of the Board of Directors, we are currently implementing actions to address the design deficiency in order to remediate the material weakness. The following describes the steps that we have taken to remediate the material weakness during the three months ended September 30, 2019:


•	We have restricted debit memo functionality within our primary ERP system by role and dollar limit authority, and have implemented additional monitoring and analytical controls performed by individuals who do not have conflicting access.


•	We have removed cash application access from our credit directors, and in markets where it is feasible, we have removed cash application access from our credit managers.


•	In markets where it is not feasible to remove cash application access from our credit managers due to resource limitations, we have implemented additional monitoring and analytical controls performed by individuals who do not have conflicting access.

We believe the measures described above will strengthen our internal control over financial reporting and remediate the identified material weakness. However, additional steps may be required and we may decide to take additional action to address control deficiencies or determine to modify certain of the remediation measures identified above. The material weakness will not be considered remediated until the applicable controls operate for a sufficient period of time, which is expected to be by December 31, 2019, and management has concluded, through testing, that these controls are operating effectively.

Changes in internal control over financial reporting

Other than with respect to the remediation actions described above, there was no change in our internal control over financial reporting during the three months ended September 30, 2019 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1 LEGAL PROCEEDINGS

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

There have been no material changes to our risk factors from the risk factors disclosed in our 2018 Annual Report on Form 10-K, as supplemented by the information in Part II, Item 1A in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2019 (“Second Quarter Form 10-Q”).

The risks described in our 2018 Annual Report on Form 10-K and Second Quarter Form 10-Q, 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.

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, which was to expire on November 20, 2019. During October 2019, the Company’s board of directors authorized extending this share repurchase program for one year, such that it will expire on November 20, 2020. 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 may be suspended or discontinued at any time. There were no repurchases during the three months ended September 30, 2019. As of September 30, 2019, the Company had approximately $55.7 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.

ITEM 6 EXHIBITS

EXHIBIT INDEX



Exhibit No.		Description
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, 2019 is formatted in Inline XBRL (included as Exhibit 101).

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 5, 2019	By:	/s/ James F. Major, Jr.
		Executive Vice President, Chief Financial Officer and Treasurer
		(Principal financial and accounting officer and duly authorized officer)

Income Taxes (Policies)	9 Months Ended
Income Taxes (Policies)	Sep. 30, 2019
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.

Debt (Narrative) (Details) - USD ($)	May 31, 2019	Sep. 15, 2016	Dec. 01, 2015	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Outstanding borrowings				$ 350,000,000	$ 350,000,000
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				14,400,000
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			$ 375,000,000.0
Outstanding borrowings				0	$ 0
Net availability				367,800,000
Letters of credit outstanding				$ 56,100,000
Revolving credit agreement maturity date			Dec. 01, 2020
Third Amendment [Member] \| Revolving credit agreement [Member]
Debt Instrument [Line Items]
Date entered into agreement	May 31, 2019
Maximum borrowing capacity	$ 425,000,000.0
Revolving credit agreement maturity date	May 31, 2024
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%

Revenue (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Revenue (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract assets change		$ 4,411
Contract liabilities change		(387)
Revenue recognized previously included in contract liabilities	$ 900	$ 32,000

Earnings Per Share (Schedule of anti-dilutive securities) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restricted stock units [Member]
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
Stock options [Member]
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
Restricted stock [Member]
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

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2019
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 $0.1 million against its deferred tax assets related to certain state tax jurisdictions as of September 30, 2019 and December 31, 2018. 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, 2019 and December 31, 2018. During the three and nine months ended September 30, 2019, the Company recorded an out of period expense of $1.6 million and $1.5 million, respectively, in Income tax expense and a corresponding increase to Income taxes payable to correct for a misstatement related to its calculation of excess windfall tax benefits on stock option exercises in certain prior periods (the “Income Tax Adjustment”). The Company has concluded that the financial impact of the Income Tax Adjustment is not material to any of its previously issued financial statements and that the correction of such Income Tax Adjustment is not material to either the three or nine months ended September 30, 2019 or to the expected financial results for the year ending December 31, 2019. 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 the Income Tax Adjustment. Excluding the Income Tax Adjustment, the Company’s effective tax rate was 24.7% and 23.6% for the three and nine months ended September 30, 2019, respectively. For the three and nine months ended September 30, 2018, the Company’s effective tax rate was 23.4% and 23.3%, respectively, which varied from the federal statutory rate of 21% primarily due to state income taxes.


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


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.


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.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income	$ 89,646	$ 91,622
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	39,722	37,297
Amortization of intangible assets	13,237	11,263
Amortization of debt issuance costs	1,124	1,263
Deferred income taxes	4,857	1,314
Non-cash stock compensation expense	9,177	8,226
Gain on sale of property, equipment and real estate	(1,839)	(3,435)
Other non-cash adjustments	2,314	686
Change in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of allowances	(24,068)	(59,768)
Inventories, net	(494)	(41,883)
Accounts payable	68,456	29,897
Other assets and liabilities	(3,715)	34,156
Net cash provided by operating activities	198,417	110,638
Cash flows from investing activities
Purchases of businesses, net of cash acquired	(85,780)	(20,970)
Purchases of property, equipment and real estate	(67,582)	(42,704)
Proceeds from sale of property, equipment and real estate	4,444	10,968
Insurance proceeds	107	1,991
Net cash used in investing activities	(148,811)	(50,715)
Cash flows from financing activities
Proceeds from revolving line of credit	110,987	713,264
Repayments of proceeds from revolving line of credit	(110,987)	(717,726)
Repurchases of common stock under share repurchase program	(16,446)	0
Payments on finance lease obligations	(5,094)
Payments on finance lease obligations		(5,937)
Principal payments on other notes	0	(75)
Other financing activities, net	(5,530)	(3,508)
Net cash used in financing activities	(27,070)	(13,982)
Net increase in cash and cash equivalents	22,536	45,941
Cash and cash equivalents
Beginning of period	150,723	11,750
End of period	173,259	57,691
Supplemental disclosure of non-cash investing and financing transactions
Acquisition-related holdback payments due at future date	5,478	1,403
Acquisition-related post-closing adjustment receivable	$ 951	0
Assets acquired under capital lease obligations		$ 821

Acquisitions (Narrative) (Details) - USD ($) $ in Thousands							3 Months Ended		7 Months Ended	9 Months Ended		12 Months Ended
Acquisitions (Narrative) (Details) - USD ($) $ in Thousands	Sep. 16, 2019	Sep. 03, 2019	Aug. 01, 2019	Feb. 08, 2019	Jan. 14, 2019	Mar. 01, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Acquisition holdback										$ 5,478	$ 1,403
Goodwill							$ 283,366			283,366		$ 262,997
Transaction costs							229	$ 0		827	$ 267
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							90,900			90,900
Acquisition holdback										5,500
Goodwill							20,400			20,400
Accounts receivable							22,100			22,100
Inventory							14,700			14,700
Property and equipment							5,600			5,600
Pre-acquisition sales												$ 199,000
Transaction costs							200			500
Net sales of acquiree since acquisition date							38,700			84,600
Estimated pre-tax earnings of acquiree since acquisition date							2,900			7,100
Shone Lumber [Member]
Business Acquisition [Line Items]
Date of acquisition						Mar. 01, 2018
Purchase price						$ 22,400
Payment of acquisition holdback										1,400
Goodwill						2,500
Accounts receivable						6,400
Inventory						8,800
Property and equipment						2,900
Current liabilities						5,300
Net sales of acquiree since acquisition date								18,700	$ 45,000
Estimated pre-tax earnings of acquiree since acquisition date								$ 800	$ 2,800
Customer relationships [Member] \| 2019 Acquisitions [Member]
Business Acquisition [Line Items]
Intangible assets							33,100			$ 33,100
Useful life										9 years
Customer relationships [Member] \| Shone Lumber [Member]
Business Acquisition [Line Items]
Intangible assets						$ 7,000
Useful life						9 years
Non-compete agreements [Member] \| 2019 Acquisitions [Member]
Business Acquisition [Line Items]
Intangible assets							$ 500			$ 500
Useful life										4 years

Leases (Weighted Average Lease Term and Discount Rate) (Details)	Sep. 30, 2019
Leases [Abstract]
Weighted average remaining lease term: Operating leases	6 years
Weighted average remaining lease term: Finance leases	4 years 9 months 18 days
Weighted average discount rate: Operating leases	6.40%
Weighted average discount rate: Finance leases	5.00%

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 173,259	$ 150,723
Accounts receivable, net of allowances	344,645	298,440
Inventories, net	324,458	309,279
Contract assets	36,759	32,348
Prepaid expenses and other current assets	66,407	56,249
Total current assets	945,528	847,039
Property and equipment, net of accumulated depreciation	338,361	294,327
Operating lease right-of-use assets	125,093	0
Customer relationship intangible assets, net of accumulated amortization	178,526	158,563
Other intangible assets, net of accumulated amortization	645	325
Goodwill	283,366	262,997
Other long-term assets	8,669	12,860
Total assets	1,880,188	1,576,111
Current liabilities
Accounts payable	201,709	123,495
Accrued expenses and other liabilities	103,003	110,276
Contract liabilities	34,501	34,888
Income taxes payable	8,879	902
Interest payable	9,572	4,759
Current portion: Long-term debt and finance lease obligations	6,369
Current portion: Long-term debt and finance lease obligations		6,661
Current portion: Operating lease liabilities	24,343	0
Current portion: Insurance reserves	19,358	15,198
Total current liabilities	407,734	296,179
Insurance reserves	43,506	41,270
Long-term debt	345,823	345,197
Long-term portion of finance lease obligations	9,832
Long-term portion of finance lease obligations		8,845
Long-term portion of operating lease liabilities	107,498	0
Deferred income taxes	7,891	3,034
Other long-term liabilities	323	6,927
Total liabilities	922,607	701,452
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, 2019 and December 31, 2018	0	0
Common stock, $0.01 par value, 300.0 million shares authorized, 68.3 million and 67.7 million shares issued, and 66.8 million and 67.2 million outstanding at September 30, 2019 and December 31, 2018, respectively	683	677
Additional paid-in capital	683,460	672,095
Retained earnings	299,991	210,345
Treasury stock, at cost, 1.5 million and 0.5 million shares at September 30, 2019 and December 31, 2018, respectively	(26,553)	(8,458)
Total stockholders’ equity	957,581	874,659
Total liabilities and stockholders’ equity	$ 1,880,188	$ 1,576,111

Earnings Per Share (Narrative) (Details) - Performance-based restricted stock units [Member]	Sep. 30, 2019 shares
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
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

Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 30, 2019
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, 2018 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, 2018 (“2018 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 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, 2019 and December 31, 2018, the Company had cash equivalents of $156.9 million and $146.1 million, respectively. 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”).
Statement of cash flows	Statement of cash flows Proceeds from revolving line of credit and repayments of proceeds from revolving line of credit as presented on the condensed consolidated statements of cash flows includes all cash activities and transactions between the Company and its associated lenders in relation to the revolving line of credit, excluding interest and fees, and is specifically inclusive of operating cash receipts that are automatically applied to the revolving line of credit pursuant to a cash sweep agreement. See Note 6 for further details on the Company’s revolving line of credit.
Recently issued accounting pronouncements	Recently adopted accounting pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2016-02, Leases, and issued subsequent amendments to the initial guidance to provide additional clarification on specific topics (“ASU 2016-02” or “Topic 842”). ASU 2016-02 establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the statement of operations. The Company adopted ASU 2016-02 on January 1, 2019 by recording ROU assets for its operating leases totaling approximately $110 million and corresponding lease liabilities totaling approximately $115 million. The impact of adopting ASU 2016-02 was not material to the Company’s results of operations or cash flows for the three and nine months ended September 30, 2019. See Note 5 for further details. Recently issued accounting pronouncements not yet adopted In June 2016, the 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 is effective for the Company’s annual and interim periods beginning on January 1, 2020, with early adoption permitted beginning January 1, 2019. Modified retrospective application is required, with certain exceptions. The Company expects to adopt the standard on January 1, 2020. The Company does not expect adoption of the standard to have a material impact on the Company’s allowance for financial instruments within the scope of the standard, including its trade receivables and contract assets. The Company continues to evaluate the disclosure requirements of the standard. 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 is 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. Early adoption is permitted for goodwill impairment tests performed on testing dates after January 1, 2017. Prospective application is required. The adoption of the standard is not expected to 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 is effective for the Company’s annual and interim periods beginning on January 1, 2020, with early adoption permitted. Certain disclosures in ASU 2018-13 are required to be applied prospectively, while others require retrospective application. The adoption of the standard is not expected to have a material impact on the Company’s consolidated financial statements.

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2019
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. As of December 31, 2018, the Company had accrued $3.0 million in relation to pending litigation that was recorded during the year ended December 31, 2017. During the nine months ended September 30, 2019, the Company paid $2.8 million to settle the matter.

Organization	9 Months Ended
Organization	Sep. 30, 2019
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.

Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Nov. 30, 2018
Organization Consolidation And Presentation [Line Items]
Cash equivalents			$ 156,900		$ 146,100
Share repurchase program authorized						$ 75,000
Repurchases of common stock under share repurchase program (shares)			1.0
Weighted average cost of repurchased shares			$ 17.11
Repurchases of common stock under share repurchase program	$ 737	$ 15,709	$ 16,400
Remaining under current repurchase authorization			55,700
Operating lease right-of-use assets			125,093	$ 110,000	$ 0
Operating lease liability			131,841	$ 115,000
Bad Debt Reserve [Member] \| Selling, General and Administrative Expenses [Member]
Organization Consolidation And Presentation [Line Items]
Prior period adjustment			4,300
Bad Debt Reserve [Member] \| Accounts Receivable [Member]
Organization Consolidation And Presentation [Line Items]
Prior period adjustment			$ (4,300)

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares shares in Millions	Sep. 30, 2019	Dec. 31, 2018
Stockholders' Equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50.0	50.0
Preferred stock, shares issued (in shares)	0.0	0.0
Preferred stock, shares outstanding (in shares)	0.0	0.0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	300.0	300.0
Common stock, shares issued (shares)	68.3	67.7
Common stock, shares outstanding (in shares)	66.8	67.2
Treasury stock (shares)	1.5	0.5

Commitments and Contingencies (Policies)	9 Months Ended
Commitments and Contingencies (Policies)	Sep. 30, 2019
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.

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY Statement - USD ($) shares in Thousands, $ 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, 2017	$ 746,899	$ 673	$ (3,821)	$ 659,440	$ 90,607
Common stock issued beginning of period (shares) at Dec. 31, 2017		67,286
Treasury stock beginning of period (shares) at Dec. 31, 2017			207
Stockholders' Equity [Abstract]
Exercise of stock options	588	$ 1		587
Exercise of stock options (shares)		55
Shares vested for long-term incentive plan	0	$ 1		(1)
Shares vested for long-term incentive plan (shares)		155
Repurchases of common stock equity related to equity award activity	(1,046)		$ (1,046)
Repurchases of common stock related to equity award activity (shares)			53
Share withholdings made in satisfaction of exercise price	0		$ (17)	17
Share withholdings made in satisfaction of exercise price (shares)			1
Stock compensation expense	1,775			1,775
Net income	15,359				15,359
Stockholders' equity end of period at Mar. 31, 2018	763,575	$ 675	$ (4,884)	661,818	105,966
Common stock issued end of period (shares) at Mar. 31, 2018		67,496
Treasury stock end of period (shares) at Mar. 31, 2018			261
Stockholders' equity beginning of period at Dec. 31, 2017	746,899	$ 673	$ (3,821)	659,440	90,607
Common stock issued beginning of period (shares) at Dec. 31, 2017		67,286
Treasury stock beginning of period (shares) at Dec. 31, 2017			207
Stockholders' Equity [Abstract]
Net income	91,622
Stockholders' equity end of period at Sep. 30, 2018	846,658	$ 676	$ (5,208)	668,961	182,229
Common stock issued end of period (shares) at Sep. 30, 2018		67,633
Treasury stock end of period (shares) at Sep. 30, 2018			276
Stockholders' equity beginning of period at Mar. 31, 2018	763,575	$ 675	$ (4,884)	661,818	105,966
Common stock issued beginning of period (shares) at Mar. 31, 2018		67,496
Treasury stock beginning of period (shares) at Mar. 31, 2018			261
Stockholders' Equity [Abstract]
Exercise of stock options	44	$ 0		44
Exercise of stock options (shares)		2
Shares vested for long-term incentive plan	0	$ 1		(1)
Shares vested for long-term incentive plan (shares)		65
Repurchases of common stock equity related to equity award activity	(103)		$ (103)
Repurchases of common stock related to equity award activity (shares)			5
Stock compensation expense	3,141			3,141
Net income	40,405				40,405
Stockholders' equity end of period at Jun. 30, 2018	807,062	$ 676	$ (4,987)	665,002	146,371
Common stock issued end of period (shares) at Jun. 30, 2018		67,563
Treasury stock end of period (shares) at Jun. 30, 2018			266
Stockholders' Equity [Abstract]
Exercise of stock options	649	$ 0		649
Exercise of stock options (shares)		35
Shares vested for long-term incentive plan	0	$ 0
Shares vested for long-term incentive plan (shares)		35
Repurchases of common stock equity related to equity award activity	(221)		$ (221)
Repurchases of common stock related to equity award activity (shares)			10
Stock compensation expense	3,310			3,310
Net income	35,858				35,858
Stockholders' equity end of period at Sep. 30, 2018	846,658	$ 676	$ (5,208)	668,961	182,229
Common stock issued end of period (shares) at Sep. 30, 2018		67,633
Treasury stock end of period (shares) at Sep. 30, 2018			276
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	67,700	67,708
Treasury stock beginning of period (shares) at Dec. 31, 2018	500		478
Stockholders' Equity [Abstract]
Exercise of stock options	$ 132	$ 0		132
Exercise of stock options (shares)		8
Shares vested for long-term incentive plan	0	$ 3		(3)
Shares vested for long-term incentive plan (shares)		290
Repurchases of common stock under share repurchase program	(15,709)		$ (15,709)
Repurchases of common stock under share repurchase program (shares)			920
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
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
Treasury stock end of period (shares) at Mar. 31, 2019			1,472
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	67,700	67,708
Treasury stock beginning of period (shares) at Dec. 31, 2018	500		478
Stockholders' Equity [Abstract]
Repurchases of common stock under share repurchase program	$ (16,400)
Repurchases of common stock under share repurchase program (shares)	1,000
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	68,300	68,266
Treasury stock end of period (shares) at Sep. 30, 2019	1,500		1,526
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
Treasury stock beginning of period (shares) at Mar. 31, 2019			1,472
Stockholders' Equity [Abstract]
Exercise of stock options	529	$ 1		528
Exercise of stock options (shares)		76
Shares vested for long-term incentive plan	0	$ 1		(1)
Shares vested for long-term incentive plan (shares)		73
Repurchases of common stock under share repurchase program	(737)		$ (737)
Repurchases of common stock under share repurchase program (shares)			41
Repurchases of common stock equity related to equity award activity	(137)		$ (137)
Repurchases of common stock related to equity award activity (shares)			6
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
Treasury stock end of period (shares) at Jun. 30, 2019			1,519
Stockholders' Equity [Abstract]
Exercise of stock options	1,533	$ 1		1,532
Exercise of stock options (shares)		84
Shares vested for long-term incentive plan	0	$ 0
Shares vested for long-term incentive plan (shares)		27
Repurchases of common stock equity related to equity award activity	(182)		$ (182)
Repurchases of common stock related to equity award activity (shares)			7
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	68,300	68,266
Treasury stock end of period (shares) at Sep. 30, 2019	1,500		1,526

Accounts Receivable (Accounts Receivable) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Trade receivables	$ 358,388	$ 305,363
Allowance for doubtful accounts	(11,214)	(4,904)
Other allowances	(2,529)	(2,019)
Accounts receivable, net	$ 344,645	$ 298,440

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2019	Nov. 04, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
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	8020 Arco Corporate Drive, Suite 400
Entity Address, City or Town	Raleigh,
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27617
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		66,749,662
Entity Central Index Key	0001574815
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Current Fiscal Year End Date	--12-31

Leases (Policies)	9 Months Ended
Leases (Policies)	Sep. 30, 2019
Leases [Abstract]
Leases	Lease Arrangements The Company has operating and finance leases primarily for its facilities, office space, land, fleet vehicles and equipment. Many of the Company’s leases are noncancellable and typically have an initial lease term of five to ten years, and most provide options at the Company’s election to renew for specified periods of time. The Company’s leases generally provide for fixed annual rentals. Certain of the Company’s leases include provisions for escalating rent, as an example, based on changes in the consumer price index. Variable lease payments based on an index or rate are initially measured using the index or rate in effect at lease commencement. Most of the Company’s leases require it to pay taxes, insurance and maintenance expenses associated with the properties. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. The Company determines if an arrangement contains a lease at inception. The Company has lease agreements with lease and non-lease components, which for all such leases are generally accounted for separately. The Company has elected the short-term lease exception under Topic 842 for all leases and as such, leases with an initial term of 12 months or less are not recorded on the unaudited condensed consolidated balance sheets. The Company recognizes lease expense for short-term leases on a straight-line basis over the lease term. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As the Company’s leases generally do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives and any initial direct costs incurred. The Company’s lease terms include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Tax Contingency [Line Items]
Valuation allowance	$ 0.1		$ 0.1		$ 0.1
Effective income tax rate	28.20%	23.40%	24.90%	23.30%
Federal statutory rate	21.00%	21.00%	21.00%	21.00%
Effective income tax rate, excluding income tax adjustment	24.70%		23.60%
Excess Windfall Tax Benefits [Member] \| Income Taxes Payable [Member]
Income Tax Contingency [Line Items]
Out of period adjustment			$ (1.5)
Income Tax Expense [Member] \| Excess Windfall Tax Benefits [Member]
Income Tax Contingency [Line Items]
Out of period adjustment	$ 1.6		$ 1.5

Earnings Per Share (Policies)	9 Months Ended
Earnings Per Share (Policies)	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings per Share	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, restricted stock 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.

Acquisitions (Policies)	9 Months Ended
Acquisitions (Policies)	Sep. 30, 2019
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. 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.