BMC Stock (BMCH) 10-Q 8 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 07, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	BMC Stock Holdings, Inc.
Entity Central Index Key	1,574,815
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		67,236,082

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 9,002	$ 11,750
Accounts receivable, net of allowances	353,749	322,892
Inventories, net	338,767	309,060
Contract assets	36,613	0
Costs in excess of billings on uncompleted contracts	0	28,738
Income taxes receivable	2,288	3,748
Prepaid expenses and other current assets	55,055	57,949
Total current assets	795,474	734,137
Property and equipment, net of accumulated depreciation	295,897	295,820
Customer relationship intangible assets, net of accumulated amortization	169,783	166,306
Other intangible assets, net of accumulated amortization	1,222	1,306
Goodwill	263,999	261,792
Other long-term assets	17,133	13,989
Total assets	1,543,508	1,473,350
Current liabilities
Accounts payable	216,558	174,583
Accrued expenses and other liabilities	83,052	96,262
Contract liabilities	29,089	0
Billings in excess of costs on uncompleted contracts	0	18,428
Interest payable	9,597	4,769
Current portion: Long-term debt and capital lease obligations	7,373	7,739
Current portion: Insurance reserves	13,786	13,496
Total current liabilities	359,455	315,277
Insurance reserves	38,251	38,470
Long-term debt	356,971	349,059
Long-term portion of capital lease obligations	13,146	14,838
Deferred income taxes	5,578	1,768
Other long-term liabilities	6,532	7,039
Total liabilities	779,933	726,451
Commitments and contingencies (Note 8)
Stockholders' equity
Preferred stock, $0.01 par value, 50.0 million shares authorized, no shares issued and outstanding at March 31, 2018 and December 31, 2017	0	0
Common stock, $0.01 par value, 300.0 million shares authorized, 67.5 million and 67.3 million shares issued, and 67.2 million and 67.1 million outstanding at March 31, 2018 and December 31, 2017, respectively	675	673
Additional paid-in capital	661,818	659,440
Retained earnings	105,966	90,607
Treasury stock, at cost, 0.3 million and 0.2 million shares at March 31, 2018 and December 31, 2017, respectively	(4,884)	(3,821)
Total stockholders' equity	763,575	746,899
Total liabilities and stockholders' equity	$ 1,543,508	$ 1,473,350

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares shares in Millions	Mar. 31, 2018	Dec. 31, 2017
Stockholders' Equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50	50
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	300	300
Common stock, shares issued (in shares)	67.5	67.3
Common stock, shares outstanding (in shares)	67.2	67.1
Treasury stock, shares	0.3	0.2

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net sales
Building products	$ 645,954	$ 572,120
Construction services	188,248	185,580
Net sales	834,202	757,700
Cost of sales
Building products	480,301	426,083
Construction services	154,817	153,420
Cost of sales	635,118	579,503
Gross profit	199,084	178,197
Selling, general and administrative expenses	160,204	148,888
Depreciation expense	9,506	10,561
Amortization expense	3,657	3,821
Merger and integration costs	1,687	4,441
Total operating expenses	175,054	167,711
Income from operations	24,030	10,486
Other income (expense)
Interest expense	(5,982)	(6,088)
Other income, net	1,950	319
Income before income taxes	19,998	4,717
Income tax expense	4,639	973
Net income	$ 15,359	$ 3,744
Weighted average common shares outstanding
Basic (in shares)	67,138	66,692
Diluted (in shares)	67,664	67,186
Net income per common share
Basic (in dollars per share)	$ 0.23	$ 0.06
Diluted (in dollars per share)	$ 0.23	$ 0.06

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income	$ 15,359	$ 3,744
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation expense	12,024	12,992
Amortization of intangible assets	3,657	3,821
Amortization of debt issuance costs	421	421
Deferred income taxes	3,810	760
Non-cash stock compensation expense	1,775	1,231
Loss on sale of property, equipment and real estate	38	107
Other non-cash adjustments	619	(314)
Change in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of allowances	(33,462)	(29,086)
Inventories, net	(24,042)	(22,030)
Accounts payable	40,212	30,868
Other assets and liabilities	2,801	(6,420)
Net cash provided by (used in) operating activities	23,212	(3,906)
Cash flows from investing activities
Purchases of businesses, net of cash acquired	(20,970)	(6,693)
Purchases of property, equipment and real estate	(10,244)	(10,662)
Insurance proceeds	1,991	0
Proceeds from sale of property, equipment and real estate	127	866
Net cash used in investing activities	(29,096)	(16,489)
Cash flows from financing activities
Proceeds from revolving line of credit	235,345	175,058
Repayments of proceeds from revolving line of credit	(227,616)	(155,313)
Payments on capital leases obligations	(2,059)	(2,667)
Principal payments on other notes	25	2,557
Other financing activities, net	(2,509)	1,735
Net cash provided by financing activities	3,136	16,256
Net decrease in cash and cash equivalents	(2,748)	(4,139)
Cash and cash equivalents
Beginning of period	11,750	8,917
End of period	9,002	4,778
Supplemental disclosure of non-cash investing and financing transactions
Acquisition-related holdback payments due at future date	1,460	375
Assets acquired under capital lease obligations	$ 0	$ 1,765

Organization

Organization	3 Months Ended
	Mar. 31, 2018
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. 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.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2018
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, 2017 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 its subsidiaries 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 financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 (“ 2017 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. Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation. Comprehensive income Comprehensive income is equal to the net income for all periods presented. Recently adopted accounting pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers, and issued subsequent amendments to the initial guidance to provide additional clarification on specific topics (“Topic 606”). Topic 606 provides a comprehensive revenue recognition model requiring companies to recognize revenue for the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. The guidance also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. The Company adopted Topic 606 on January 1, 2018 using the modified retrospective transition method. See Note 6 for further details. In August 2016, the FASB issued Accounting Standards Update 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”). ASU 2016-15 was issued to decrease the diversity in practice of how certain cash receipts and cash payments are presented and classified in the statement of cash flows by providing guidance on eight specific cash flow issues. Retrospective application is required. ASU 2016-15 became effective for the Company’s annual and interim periods beginning on January 1, 2018. The adoption of the standard did not have an impact on the Company’s current or historical financial statements. In November 2016, the FASB issued Accounting Standards Update 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (“ASU 2016-18”). ASU 2016-18 requires that the statement of cash flows include restricted cash in the beginning and end-of-period total amounts shown and that the statement of cash flows explain the changes in restricted cash during the period. Retrospective application is required. ASU 2016-18 became effective for the Company's annual and interim periods beginning on January 1, 2018. The adoption of the standard did not have an impact on the Company’s current or historical financial statements. In January 2017, the FASB issued Accounting Standards Update 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business (“ASU 2017-01”). ASU 2017-01 provides guidance in determining when a set of assets and activities meets the definition of a business. Prospective application is required. ASU 2017-01 became effective for the Company's annual and interim periods beginning on January 1, 2018. The adoption of the standard did not have an impact on the Company’s current financial statements. In February 2017, the FASB issued Accounting Standards Update 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets (“ASU 2017-05”). ASU 2017-05 clarifies the scope of Subtopic 610-20, which provides guidance for recognizing gains and losses from the sale or transfer of nonfinancial assets in contracts with noncustomers. ASU 2017-05 also provides guidance for partial sales of nonfinancial assets. ASU 2017-05 became effective for the Company’s annual and interim periods beginning on January 1, 2018. The adoption of the standard did not have an impact on the Company’s current or historical financial statements. In May 2017, the FASB issued Accounting Standards Update 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting (“ASU 2017-09”). ASU 2017-09 provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting under Accounting Standards Codification (“ASC”) 718. ASU 2017-09 is to be applied prospectively to an award modified on or after the adoption date. ASU 2017-09 became effective for the Company’s annual and interim periods beginning on January 1, 2018. The adoption of the standard did not have an impact on the Company’s current financial statements. In March 2018, the FASB issued Accounting Standards Update 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (“ASU 2018-05”). ASU 2018-05 adds paragraphs to the codification pursuant to SEC Staff Accounting Bulletin No. 118, which addresses the application of GAAP in situations when a company does not have the necessary information available, prepared or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Cuts and Jobs Act (the “2017 Tax Act”). ASU 2018-05 provides entities with a one year measurement period from the December 22, 2017 enactment date in order to complete the accounting. The Company recognized a provisional net tax benefit of $3.6 million related to the impact of the 2017 Tax Act during the year ended December 31, 2017. The Company may record additional provisional amounts or adjustments to provisional amounts during the measurement period. Recently issued accounting pronouncements not yet adopted In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases (“ASU 2016-02”). 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 income statement. ASU 2016-02 is effective for the Company’s annual and interim periods beginning on January 1, 2019. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. The Company is in the process of evaluating the impact of the standard on the Company’s financial statements. As a lessee, certain of the Company’s various leases under existing guidance are classified as operating leases that are not recorded on the balance sheet but are recorded in the statement of operations as expense is incurred. Upon adoption of the standard, the Company will be required to record substantially all leases on the balance sheet as a ROU asset and a lease liability. The timing of expense recognition and classification in the statement of operations could change based on the classification of leases as either operating or financing. 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 financial statements.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2018
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. Acquisition of W.E. Shone Co. 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 preliminary purchase price of $22.4 million . This acquisition enhances the Company’s value-added offerings and footprint in the Mid-Atlantic region. The preliminary purchase price includes a holdback which, after certain post-closing adjustments, requires the Company to pay $1.5 million to the sellers one year from the closing date. The holdback amount may be further reduced under certain circumstances. The Company funded the transaction through available cash and borrowings on the Company’s revolving line of credit. The acquisition was accounted for using the acquisition method of accounting under ASC 805, Business Combinations, whereby the results of operations of Shone Lumber are included in the Company’s consolidated financial statements beginning on the acquisition date. The preliminary purchase price allocation resulted in the initial recognition of goodwill of $2.2 million , a customer relationship intangible asset of $7.1 million , accounts receivable of $6.4 million , inventory of $8.8 million , property and equipment of $3.1 million and total current liabilities of $5.2 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. The purchase price allocation of Shone Lumber is preliminary and based upon all information available to the Company at the present time, and is 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 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, 2017, Shone Lumber generated net sales of approximately $70.7 million . The Company incurred transaction costs of $0.2 million for the three months ended March 31, 2018 . 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 March 31, 2018 were $5.4 million and $0.3 million , respectively. The impact of the acquisition was not considered significant for the reporting of pro forma financial information. Acquisition of Code Plus Components, LLC On March 27, 2017 , the Company acquired substantially all of the assets and assumed certain liabilities of Code Plus Components, LLC (“Code Plus”), a manufacturer of structural components located in Martinsburg, West Virginia, for a purchase price of $7.1 million . This acquisition allowed the Company to add truss manufacturing capability to its value-added offerings in the Washington, DC metro area. The acquisition includes an earnout provision that would require the Company to pay the sellers up to an additional $0.8 million upon the acquired operations achieving certain performance targets from the acquisition date through December 31, 2018. The Company funded the transaction through borrowings on the Company’s revolving line of credit. The acquisition was accounted for using the acquisition method of accounting under ASC 805, Business Combinations, whereby the results of operations of Code Plus are included in the Company’s consolidated financial statements beginning on the acquisition date. The purchase price allocation resulted in the recognition of goodwill of $3.4 million , a customer relationship intangible asset of $2.3 million and a non-compete agreement intangible asset of $0.5 million , as well as other operating assets and liabilities. The customer relationship intangible asset and non-compete agreement intangible asset have useful lives of 12 years and 5 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 recognized is expected to be deductible for tax purposes. The results of operations of Code Plus included in the Company’s unaudited condensed consolidated statements of operations for the three months ended March 31, 2017 were not material. The impact of the acquisition was not significant for the reporting of pro forma financial information.

Accounts Receivable

Accounts Receivable	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Accounts Receivable	Accounts Receivable Accounts receivable consist of the following at March 31, 2018 and December 31, 2017 : (in thousands) March 31, December 31, Trade receivables $ 361,722 $ 333,954 Allowance for doubtful accounts (5,333 ) (4,771 ) Sales returns allowance (a) — (4,127 ) Other allowances (2,640 ) (2,164 ) $ 353,749 $ 322,892 (a) Effective January 1, 2018, as part of the Company’s adoption of Topic 606, the Company has recorded a liability for estimated returns of inventory as a refund liability within accrued expenses and other liabilities. These balances were previously presented as an allowance within accounts receivable. See Note 6 for further details.

Debt

Debt	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Debt	Debt Long-term debt as of March 31, 2018 and December 31, 2017 consists of the following: (in thousands) March 31, December 31, Senior secured notes, due 2024 $ 350,000 $ 350,000 Revolving credit agreement 12,191 4,462 Other 311 336 362,502 354,798 Unamortized debt issuance costs related to senior secured notes (5,430 ) (5,639 ) 357,072 349,159 Less: Current portion of long-term debt 101 100 $ 356,971 $ 349,059 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 March 31, 2018 , the estimated market value of the Senior Notes approximated the carrying amount. The fair value is based on institutional trading activity and was classified as a Level 2 measurement in accordance with ASC 820. Revolving Credit Agreement On December 1, 2015 , the Company entered into a senior secured credit agreement with Wells Fargo Capital Finance, as administrative agent, and certain other lenders (the “Original Credit Agreement”), which includes a revolving line of credit (the “Revolver”). The Original Credit Agreement, as amended (the “Credit Agreement”), has an aggregate commitment of $375.0 million . The Company had outstanding borrowings under the Revolver of $12.2 million with net availability of $301.5 million as of March 31, 2018 . The interest rate on borrowings outstanding as of March 31, 2018 , all of which were base rate borrowings, was 5.0% . The Company had $61.3 million in letters of credit outstanding under the Credit Agreement as of March 31, 2018 . The carrying value of the Revolver at March 31, 2018 approximates fair value as the rates are comparable to those at which the Company could currently borrow under similar terms, are variable and incorporate a measure of the Company’s credit risk. As such, the fair value of the Revolver was classified as a Level 2 measurement in accordance with ASC 820. Other Other long-term debt as of March 31, 2018 consists of a $0.3 million term note secured by real property with a maturity of February 2021 . The interest rate is 7.0% and is paid monthly. The estimated market value of other long-term debt approximates the carrying amount.

Revenue

Revenue	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue [Text Block]	Revenue Adoption of Topic 606 On January 1, 2018, the Company adopted Topic 606 using the modified retrospective method applied to those contracts that were not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with the Company’s historic accounting policy under Topic 605, Revenue Recognition. The impact of adopting Topic 606 was not material to the Company’s results of operations for the three months ended March 31, 2018 and as such, comparability between periods is not materially affected. Beginning January 1, 2018, the Company has presented contract assets and contract liabilities on its unaudited condensed consolidated balance sheets, determined on a contract-by-contract basis. Contract assets contain rights to payment that are conditional on something other than the passage of time, such as retainage, which were historically presented within accounts receivable, net of allowances, as well as the balances that were historically presented within costs in excess of billings on uncompleted contracts on the Company’s consolidated balance sheets. Contract liabilities contain advances from customers, which were historically presented within accrued expenses and other liabilities, as well as the balances that were historically presented within billings in excess of costs on uncompleted contracts on the Company’s consolidated balance sheets. Refer to further discussion of the Company’s contract assets and contract liabilities below. Additionally, beginning January 1, 2018, the Company has presented a return asset, which represents inventory the Company expects to receive from customers related to estimated sales returns, within prepaid expenses and other current assets on the Company’s unaudited condensed consolidated balance sheets. This balance was previously presented within inventories, net on the Company’s consolidated balance sheets. Conversely, the Company has recorded a refund liability for estimated returns of inventory within accrued expenses and other liabilities on the Company’s unaudited condensed consolidated balance sheets. These balances were previously presented as an allowance within accounts receivable, net of allowances on the Company’s consolidated balance sheets. The following table reflects the cumulative impact of adoption of Topic 606. As the cumulative impact of adopting Topic 606 on the Company’s historical results of operations was less than $0.1 million , the Company did not record an adjustment to opening retained earnings as of January 1, 2018. (in thousands) December 31, 2017 Adoption of Topic 606 January 1, 2018 Accounts receivable, net of allowances $ 322,892 $ (8,884 ) $ 314,008 Inventories, net 309,060 (3,128 ) 305,932 Contract assets — 38,557 38,557 Costs in excess of billings on uncompleted contracts 28,738 (28,738 ) — Prepaid expenses and other current assets 57,949 3,128 61,077 Total assets 1,473,350 935 1,474,285 Accrued expenses and other liabilities 96,262 (6,967 ) 89,295 Contract liabilities — 26,330 26,330 Billings in excess of costs on uncompleted contracts 18,428 (18,428 ) — Total liabilities 726,451 935 727,386 Total liabilities and stockholders' equity $ 1,473,350 $ 935 $ 1,474,285 The following table reflects the impact of adoption of Topic 606 on the Company’s financial position as of March 31, 2018 . (in thousands) Balances without Adoption of Topic 606 Adjustments As Reported Accounts receivable, net of allowances $ 361,631 $ (7,882 ) $ 353,749 Inventories, net 342,735 (3,968 ) 338,767 Contract assets — 36,613 36,613 Costs in excess of billings on uncompleted contracts 26,912 (26,912 ) — Prepaid expenses and other current assets 51,087 3,968 55,055 Total assets 1,541,689 1,819 1,543,508 Accrued expenses and other liabilities 89,700 (6,648 ) 83,052 Contract liabilities — 29,089 29,089 Billings in excess of costs on uncompleted contracts 20,622 (20,622 ) — Total liabilities 778,114 1,819 779,933 Total liabilities and stockholders' equity $ 1,541,689 $ 1,819 $ 1,543,508 Nature of goods and services A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account in Topic 606. The Company’s building products contracts typically contain a promise to supply multiple distinct products and thus, they generally contain multiple performance obligations under Topic 606. Depending on the nature of the promises within the Company’s construction services contracts and whether they are distinct under Topic 606, there may be a single performance obligation or multiple performance obligations. For contracts with multiple performance obligations, the contract’s transaction price is allocated to each distinct performance obligation based on the standalone selling price of each distinct good or service, which is generally determined based on the prices charged to customers. The Company recognizes revenue for its building products contracts when control of the promised goods (the performance obligations) is transferred to the Company’s customers. This generally occurs at a point in time when the products are delivered and the customer obtains physical possession, legal title and the risks and rewards of ownership. However, for certain product offerings, products are customized to customer specifications and the customer benefits from the Company’s performance over time as deliveries are made. As such, the Company has determined that an output method based on units delivered best depicts the transfer of control to the customer. The Company generally recognizes revenue for its construction services contracts over time using cost based input methods. Periodic estimates of progress towards completion are made based on either a comparison of labor costs incurred to date with total estimated contract labor costs or total costs incurred to date with total estimated contract costs. Incurred costs represent work performed, which correspond and best depict transfer of control to the customer. Contract revenues and contract costs to be recognized are dependent on the accuracy of estimates, including quantities of materials, labor productivity and other cost estimates. Historically, the Company has made reasonable estimates of the extent of progress towards completion and contract completion costs. Due to uncertainties inherent in the estimation process, it is possible that actual completion costs may vary from estimates. Revenue recognized for performance obligations satisfied over time for the three months ended March 31, 2018 represented approximately 27% of total revenues for the period. Estimated losses on uncompleted contracts and changes in contract estimates reflect the Company's best estimate of probable losses of unbilled receivables, and are recognized in the period such revisions are known and can be reasonably estimated. These estimates are recognized in cost of sales. Estimated losses on uncompleted contracts and changes in contract estimates are established by assessing estimated costs to complete, change orders and claims for uncompleted contracts. Assumptions for estimated costs to complete include material prices, labor costs, labor productivity and contract claims. Such estimates are inherently uncertain and it is possible that actual completion costs may vary from these estimates. All sales recognized are net of allowances for discounts and estimated returns, based on historical experience. Taxes assessed by governmental authorities that are directly imposed on the Company’s revenue-producing transactions are excluded from sales. The Company accounts for shipping and handling costs associated with its contracts as a fulfillment cost and expenses these as incurred within selling, general and administrative expenses on the unaudited condensed consolidated statements of operations. Disaggregation of revenue The following tables present the Company’s net sales disaggregated by major product category and customer type. As noted above, prior period amounts have not been adjusted under the modified retrospective method and continue to be reported in accordance with the Company’s historic accounting policy under Topic 605. The following table shows net sales classified by major product category for the three months ended March 31, 2018 and 2017 : Three Months Ended March 31, (in thousands) 2018 2017 Structural components $ 135,829 $ 109,891 Lumber & lumber sheet goods 288,086 244,436 Millwork, doors & windows 229,518 210,751 Other building products & services 180,769 192,622 Total net sales $ 834,202 $ 757,700 The following table reflects the Company’s estimate of net sales by each customer type for the three months ended March 31, 2018 and 2017 : Three Months Ended March 31, (in thousands) 2018 2017 Single-family homebuilders $ 637,308 $ 559,589 Remodeling contractors 95,451 82,075 Multi-family, commercial & other contractors 101,443 116,036 Total net sales $ 834,202 $ 757,700 Contract balances The timing of revenue recognition, invoicing and cash collection affects receivables, contract assets and contract liabilities on the Company’s unaudited condensed consolidated balance sheets. For building products contracts that contain performance obligations satisfied at a point in time, the Company recognizes revenue upon satisfaction of the performance obligation and then bills the customer, resulting in a receivable. For building products contracts that contain performance obligations satisfied over time, the Company recognizes revenue as the performance obligation is satisfied, but prior to billing, resulting in an unbilled receivable, as the Company has an unconditional right to payment. For the Company’s construction services contracts, amounts are generally billed as work progresses in accordance with agreed-upon contractual terms. Revenue is also recognized over time as the performance obligations are satisfied, which can result in contract assets and liabilities, on a contract-by-contract basis, due to timing differences between billing and revenue recognition. Contract assets include unbilled amounts when the revenue recognized exceeds the amount billed to the customer. Conversely, contract liabilities include amounts that have been billed to the customer in excess of the revenue recognized. At times, the Company will have a right to payment from previous performance that is conditional on something other than passage of time, such as retainage, which creates a contract asset. Conversely, the Company may receive advances from customers prior to the Company’s performance, which creates a contract liability. Contract assets are reclassified to a receivable when the right to consideration becomes unconditional. The Company’s terms generally provide for payment within 30 days of being invoiced. On occasion, when necessary to compete in certain circumstances, the Company will offer extended payment terms, which do not exceed one year. The following table reflects the Company’s contract balances as of March 31, 2018 and January 1, 2018, the date that the Company adopted Topic 606: (in thousands) March 31, 2018 January 1, 2018 Change Receivables, including unbilled receivables presented in prepaid expenses and other current assets $ 360,696 $ 321,418 $ 39,278 Contract assets 36,613 38,557 (1,944 ) Contract liabilities $ 29,089 $ 26,330 $ 2,759 During the three months ended March 31, 2018, the Company’s contract assets decreased by $1.9 million and the Company’s contract liabilities increased by $2.8 million . The change in contract assets and liabilities was primarily due to the timing of revenue recognition, as the balances were not materially impacted by any other factors. For the three months ended March 31, 2018 , the Company recognized revenue of $21.6 million that was included in contract liabilities as of January 1, 2018. Revenue recognized related to performance obligations that were satisfied or partially satisfied in previous periods was not material for the three months ended March 31, 2018 . Practical Expedients As permitted by Topic 606, the Company has elected to expense any incremental costs of obtaining a contract as incurred as the amortization period would have been one year or less. Additionally, as permitted by Topic 606, the Company has elected not to adjust the promised amount of consideration for a significant financing component as the Company expects that the period of time between the Company’s satisfaction of the performance obligation and the customer’s payment would have been one year or less. Finally, as permitted by Topic 606, 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.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
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 March 31, 2018 and December 31, 2017 . 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 March 31, 2018 and December 31, 2017 . For the three months ended March 31, 2018 , the Company’s effective tax rate was 23.2% , which varied from the federal statutory rate of 21% primarily due to state income tax expense offset by excess tax windfall benefits from stock compensation. For the three months ended March 31, 2017 , the effective tax rate was 20.6% , which varied from the federal statutory rate of 35% primarily due to the excess tax windfall benefit from stock compensation partially offset by state income tax expense. The 2017 Tax Act was enacted in December 2017. The 2017 Tax Act reduced the U.S. federal corporate tax rate from 35% to 21% , among other provisions. The Company has recognized a net tax benefit of $3.6 million related to the impact of the 2017 Tax Act for the remeasurement of deferred tax assets and liabilities and included this amount in its consolidated financial statements for the year ended December 31, 2017, on a provisional basis based on information currently available. The 2017 Tax Act may be subject to technical amendments, as well as interpretations and implementing regulations by the Department of Treasury and Internal Revenue Service, any of which could increase or decrease one or more impacts of the legislation. As such, the Company may record additional provisional amounts or adjustments to provisional amounts during the measurement period ending no later than December 2018. As of March 31, 2018, the Company has not adjusted the provisional estimates recognized in 2017.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	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 March 31, 2018 , the Company has accrued $3.0 million in relation to pending litigation that was recorded during the year ended December 31, 2017. The amount accrued is based upon currently available information, however, the ultimate obligation may be higher.

Stock Based Compensation

Stock Based Compensation	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation	Stock Based Compensation The following table highlights the expense related to stock based compensation for the three months ended March 31, 2018 and 2017 : Three Months Ended March 31, (in thousands) 2018 2017 Restricted stock units (a) $ 1,658 $ 1,004 Restricted stock 91 136 Stock options 26 91 Stock based compensation $ 1,775 $ 1,231 (a) Includes service-based and performance-based restricted stock units. During the three months ended March 31, 2018 , in addition to grants of service-based restricted stock unit awards, the Company granted performance-based restricted stock units that vest in March 2021 . The weighted average grant date fair value of the performance-based restricted stock units was $19.30 . The number of performance-based restricted stock units that are issued on the vesting date could range from zero to a maximum of 0.2 million , based 50% upon the Company’s average return on invested capital (“Average ROIC”) over the three year period from January 1, 2018 through December 31, 2020 and 50% upon the Company’s cumulative adjusted earnings per share (“Adjusted EPS”) over the same three -year period. During the three months ended March 31, 2017 , in addition to grants of service-based restricted stock unit awards, the Company granted performance-based restricted stock units that vest in March 2020 . The weighted average grant date fair value of the performance-based restricted stock units was $21.35 . The number of performance-based restricted stock units that are issued on the vesting date could range from zero to a maximum of 0.2 million , based 50% upon the Company’s Average ROIC over the three year period from January 1, 2017 through December 31, 2019 and 50% upon the Company’s cumulative Adjusted EPS over the same three -year period.

Segments

Segments	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Segments	Segments ASC 280, Segment Reporting, defines operating segments as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to allocate resources and in assessing performance. The Company’s operating segments consist of the Mid-Atlantic, Southeast, Texas, Intermountain and Western divisions. The CODM reviews aggregate information to allocate resources and assess performance. Based on the CODM’s review, as well as the similar economic characteristics, nature of products, distribution methods and customers of the divisions, the Company has aggregated its operating segments into one reportable segment, “Geographic divisions.” In addition to the Company’s reportable segment, the Company’s consolidated results include “Other reconciling items.” Other reconciling items is comprised of 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 months ended March 31, 2018 and 2017 . Adjusted EBITDA is used as a performance metric by the CODM in determining how to allocate resources and assess performance. Three Months Ended March 31, 2018 (in thousands) Net Sales Gross Profit Depreciation & Amortization Adjusted EBITDA Geographic divisions $ 834,202 $ 199,084 $ 15,211 $ 63,674 Other reconciling items — — 470 (16,494 ) $ 834,202 $ 199,084 $ 15,681 Three Months Ended March 31, 2017 (in thousands) Net Sales Gross Profit Depreciation & Amortization Adjusted EBITDA Geographic divisions $ 757,700 $ 178,197 $ 16,227 $ 47,403 Other reconciling items — — 586 (13,840 ) $ 757,700 $ 178,197 $ 16,813 Reconciliation to consolidated financial statements: Three Months Ended March 31, (in thousands) 2018 2017 Income before income taxes $ 19,998 $ 4,717 Interest expense 5,982 6,088 Depreciation and amortization 15,681 16,813 Merger and integration costs 1,687 4,441 Non-cash stock compensation expense 1,775 1,231 Acquisition costs 234 273 Other items (a) 1,823 — Adjusted EBITDA of other reconciling items 16,494 13,840 Adjusted EBITDA of geographic divisions reportable segment $ 63,674 $ 47,403 (a) Represents severance and executive search costs incurred in connection with the departure of the Company’s former chief executive officer and the search for his permanent replacement.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2018
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. The basic and diluted EPS calculations for the three months ended March 31, 2018 and 2017 are presented below: Three Months Ended March 31, (in thousands, except per share amounts) 2018 2017 Income attributable to common stockholders $ 15,359 $ 3,744 Weighted average common shares outstanding, basic 67,138 66,692 Effect of dilutive securities: Restricted stock units 299 178 Stock options 172 233 Restricted stock 55 83 Weighted average common shares outstanding, diluted 67,664 67,186 Basic income per common share $ 0.23 $ 0.06 Diluted income per common share $ 0.23 $ 0.06 The following table provides the securities that could potentially dilute EPS in the future, but were not included in the computation of diluted EPS for the periods presented because to do so would have been anti-dilutive. The amounts included in this table exclude performance-based restricted stock units. As of March 31, 2018 , the number of currently outstanding performance-based restricted stock units that are issued upon vesting could range from zero to a maximum of 0.4 million . Three Months Ended March 31, (in thousands) 2018 2017 Restricted stock units 21 21 Stock options — 303

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2018
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, 2017 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 its subsidiaries 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 financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 (“ 2017 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.
Reclassifications	Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation.
Comprehensive income	Comprehensive income Comprehensive income is equal to the net income for all periods presented.
Recently issued accounting pronouncements	Recently adopted accounting pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers, and issued subsequent amendments to the initial guidance to provide additional clarification on specific topics (“Topic 606”). Topic 606 provides a comprehensive revenue recognition model requiring companies to recognize revenue for the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. The guidance also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. The Company adopted Topic 606 on January 1, 2018 using the modified retrospective transition method. See Note 6 for further details. In August 2016, the FASB issued Accounting Standards Update 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”). ASU 2016-15 was issued to decrease the diversity in practice of how certain cash receipts and cash payments are presented and classified in the statement of cash flows by providing guidance on eight specific cash flow issues. Retrospective application is required. ASU 2016-15 became effective for the Company’s annual and interim periods beginning on January 1, 2018. The adoption of the standard did not have an impact on the Company’s current or historical financial statements. In November 2016, the FASB issued Accounting Standards Update 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (“ASU 2016-18”). ASU 2016-18 requires that the statement of cash flows include restricted cash in the beginning and end-of-period total amounts shown and that the statement of cash flows explain the changes in restricted cash during the period. Retrospective application is required. ASU 2016-18 became effective for the Company's annual and interim periods beginning on January 1, 2018. The adoption of the standard did not have an impact on the Company’s current or historical financial statements. In January 2017, the FASB issued Accounting Standards Update 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business (“ASU 2017-01”). ASU 2017-01 provides guidance in determining when a set of assets and activities meets the definition of a business. Prospective application is required. ASU 2017-01 became effective for the Company's annual and interim periods beginning on January 1, 2018. The adoption of the standard did not have an impact on the Company’s current financial statements. In February 2017, the FASB issued Accounting Standards Update 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets (“ASU 2017-05”). ASU 2017-05 clarifies the scope of Subtopic 610-20, which provides guidance for recognizing gains and losses from the sale or transfer of nonfinancial assets in contracts with noncustomers. ASU 2017-05 also provides guidance for partial sales of nonfinancial assets. ASU 2017-05 became effective for the Company’s annual and interim periods beginning on January 1, 2018. The adoption of the standard did not have an impact on the Company’s current or historical financial statements. In May 2017, the FASB issued Accounting Standards Update 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting (“ASU 2017-09”). ASU 2017-09 provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting under Accounting Standards Codification (“ASC”) 718. ASU 2017-09 is to be applied prospectively to an award modified on or after the adoption date. ASU 2017-09 became effective for the Company’s annual and interim periods beginning on January 1, 2018. The adoption of the standard did not have an impact on the Company’s current financial statements. In March 2018, the FASB issued Accounting Standards Update 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (“ASU 2018-05”). ASU 2018-05 adds paragraphs to the codification pursuant to SEC Staff Accounting Bulletin No. 118, which addresses the application of GAAP in situations when a company does not have the necessary information available, prepared or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Cuts and Jobs Act (the “2017 Tax Act”). ASU 2018-05 provides entities with a one year measurement period from the December 22, 2017 enactment date in order to complete the accounting. The Company recognized a provisional net tax benefit of $3.6 million related to the impact of the 2017 Tax Act during the year ended December 31, 2017. The Company may record additional provisional amounts or adjustments to provisional amounts during the measurement period. Recently issued accounting pronouncements not yet adopted In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases (“ASU 2016-02”). 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 income statement. ASU 2016-02 is effective for the Company’s annual and interim periods beginning on January 1, 2019. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. The Company is in the process of evaluating the impact of the standard on the Company’s financial statements. As a lessee, certain of the Company’s various leases under existing guidance are classified as operating leases that are not recorded on the balance sheet but are recorded in the statement of operations as expense is incurred. Upon adoption of the standard, the Company will be required to record substantially all leases on the balance sheet as a ROU asset and a lease liability. The timing of expense recognition and classification in the statement of operations could change based on the classification of leases as either operating or financing. 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 financial statements.

Acquisitions (Policies)

Acquisitions (Policies)	3 Months Ended
	Mar. 31, 2018
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.

Revenue Revenue (Policies)

Revenue Revenue (Policies)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue recognition	The Company recognizes revenue for its building products contracts when control of the promised goods (the performance obligations) is transferred to the Company’s customers. This generally occurs at a point in time when the products are delivered and the customer obtains physical possession, legal title and the risks and rewards of ownership. However, for certain product offerings, products are customized to customer specifications and the customer benefits from the Company’s performance over time as deliveries are made. As such, the Company has determined that an output method based on units delivered best depicts the transfer of control to the customer. The Company generally recognizes revenue for its construction services contracts over time using cost based input methods. Periodic estimates of progress towards completion are made based on either a comparison of labor costs incurred to date with total estimated contract labor costs or total costs incurred to date with total estimated contract costs. Incurred costs represent work performed, which correspond and best depict transfer of control to the customer. Contract revenues and contract costs to be recognized are dependent on the accuracy of estimates, including quantities of materials, labor productivity and other cost estimates. Historically, the Company has made reasonable estimates of the extent of progress towards completion and contract completion costs. Due to uncertainties inherent in the estimation process, it is possible that actual completion costs may vary from estimates. Revenue recognized for performance obligations satisfied over time for the three months ended March 31, 2018 represented approximately 27% of total revenues for the period. Estimated losses on uncompleted contracts and changes in contract estimates reflect the Company's best estimate of probable losses of unbilled receivables, and are recognized in the period such revisions are known and can be reasonably estimated. These estimates are recognized in cost of sales. Estimated losses on uncompleted contracts and changes in contract estimates are established by assessing estimated costs to complete, change orders and claims for uncompleted contracts. Assumptions for estimated costs to complete include material prices, labor costs, labor productivity and contract claims. Such estimates are inherently uncertain and it is possible that actual completion costs may vary from these estimates. All sales recognized are net of allowances for discounts and estimated returns, based on historical experience. Taxes assessed by governmental authorities that are directly imposed on the Company’s revenue-producing transactions are excluded from sales.

Income Taxes (Policies)

Income Taxes (Policies)	3 Months Ended
	Mar. 31, 2018
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.

Commitments and Contingencies (

Commitments and Contingencies (Policies)	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingencies	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.

Earnings Per Share (Policies)

Earnings Per Share (Policies)	3 Months Ended
	Mar. 31, 2018
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.

Accounts Receivable (Tables)

Accounts Receivable (Tables)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Schedule of accounts receivable	Accounts receivable consist of the following at March 31, 2018 and December 31, 2017 : (in thousands) March 31, December 31, Trade receivables $ 361,722 $ 333,954 Allowance for doubtful accounts (5,333 ) (4,771 ) Sales returns allowance (a) — (4,127 ) Other allowances (2,640 ) (2,164 ) $ 353,749 $ 322,892 (a) Effective January 1, 2018, as part of the Company’s adoption of Topic 606, the Company has recorded a liability for estimated returns of inventory as a refund liability within accrued expenses and other liabilities. These balances were previously presented as an allowance within accounts receivable. See Note 6 for further details.

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Schedule of debt	Long-term debt as of March 31, 2018 and December 31, 2017 consists of the following: (in thousands) March 31, December 31, Senior secured notes, due 2024 $ 350,000 $ 350,000 Revolving credit agreement 12,191 4,462 Other 311 336 362,502 354,798 Unamortized debt issuance costs related to senior secured notes (5,430 ) (5,639 ) 357,072 349,159 Less: Current portion of long-term debt 101 100 $ 356,971 $ 349,059

Revenue Revenue (Tables)

Revenue Revenue (Tables)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Impact of Adoption of Topic 606 [Table Text Block]	The following table reflects the cumulative impact of adoption of Topic 606. As the cumulative impact of adopting Topic 606 on the Company’s historical results of operations was less than $0.1 million , the Company did not record an adjustment to opening retained earnings as of January 1, 2018. (in thousands) December 31, 2017 Adoption of Topic 606 January 1, 2018 Accounts receivable, net of allowances $ 322,892 $ (8,884 ) $ 314,008 Inventories, net 309,060 (3,128 ) 305,932 Contract assets — 38,557 38,557 Costs in excess of billings on uncompleted contracts 28,738 (28,738 ) — Prepaid expenses and other current assets 57,949 3,128 61,077 Total assets 1,473,350 935 1,474,285 Accrued expenses and other liabilities 96,262 (6,967 ) 89,295 Contract liabilities — 26,330 26,330 Billings in excess of costs on uncompleted contracts 18,428 (18,428 ) — Total liabilities 726,451 935 727,386 Total liabilities and stockholders' equity $ 1,473,350 $ 935 $ 1,474,285 The following table reflects the impact of adoption of Topic 606 on the Company’s financial position as of March 31, 2018 . (in thousands) Balances without Adoption of Topic 606 Adjustments As Reported Accounts receivable, net of allowances $ 361,631 $ (7,882 ) $ 353,749 Inventories, net 342,735 (3,968 ) 338,767 Contract assets — 36,613 36,613 Costs in excess of billings on uncompleted contracts 26,912 (26,912 ) — Prepaid expenses and other current assets 51,087 3,968 55,055 Total assets 1,541,689 1,819 1,543,508 Accrued expenses and other liabilities 89,700 (6,648 ) 83,052 Contract liabilities — 29,089 29,089 Billings in excess of costs on uncompleted contracts 20,622 (20,622 ) — Total liabilities 778,114 1,819 779,933 Total liabilities and stockholders' equity $ 1,541,689 $ 1,819 $ 1,543,508
Disaggregation of Revenue [Table Text Block]	The following table shows net sales classified by major product category for the three months ended March 31, 2018 and 2017 : Three Months Ended March 31, (in thousands) 2018 2017 Structural components $ 135,829 $ 109,891 Lumber & lumber sheet goods 288,086 244,436 Millwork, doors & windows 229,518 210,751 Other building products & services 180,769 192,622 Total net sales $ 834,202 $ 757,700 The following table reflects the Company’s estimate of net sales by each customer type for the three months ended March 31, 2018 and 2017 : Three Months Ended March 31, (in thousands) 2018 2017 Single-family homebuilders $ 637,308 $ 559,589 Remodeling contractors 95,451 82,075 Multi-family, commercial & other contractors 101,443 116,036 Total net sales $ 834,202 $ 757,700
Contract Assets and Liabilities [Table Text Block]	The following table reflects the Company’s contract balances as of March 31, 2018 and January 1, 2018, the date that the Company adopted Topic 606: (in thousands) March 31, 2018 January 1, 2018 Change Receivables, including unbilled receivables presented in prepaid expenses and other current assets $ 360,696 $ 321,418 $ 39,278 Contract assets 36,613 38,557 (1,944 ) Contract liabilities $ 29,089 $ 26,330 $ 2,759

Stock Based Compensation (Table

Stock Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of expenses related to share-based payments	The following table highlights the expense related to stock based compensation for the three months ended March 31, 2018 and 2017 : Three Months Ended March 31, (in thousands) 2018 2017 Restricted stock units (a) $ 1,658 $ 1,004 Restricted stock 91 136 Stock options 26 91 Stock based compensation $ 1,775 $ 1,231 (a) Includes service-based and performance-based restricted stock units.

Segments (Tables)

Segments (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Schedule of net sales, adjusted EBITDA and certain other measures by reportable segment	The following tables present Net Sales, Adjusted EBITDA and certain other measures for the reportable segment and total Company operations for the three months ended March 31, 2018 and 2017 . Adjusted EBITDA is used as a performance metric by the CODM in determining how to allocate resources and assess performance. Three Months Ended March 31, 2018 (in thousands) Net Sales Gross Profit Depreciation & Amortization Adjusted EBITDA Geographic divisions $ 834,202 $ 199,084 $ 15,211 $ 63,674 Other reconciling items — — 470 (16,494 ) $ 834,202 $ 199,084 $ 15,681 Three Months Ended March 31, 2017 (in thousands) Net Sales Gross Profit Depreciation & Amortization Adjusted EBITDA Geographic divisions $ 757,700 $ 178,197 $ 16,227 $ 47,403 Other reconciling items — — 586 (13,840 ) $ 757,700 $ 178,197 $ 16,813
Reconciliation to consolidated financial statements	Reconciliation to consolidated financial statements: Three Months Ended March 31, (in thousands) 2018 2017 Income before income taxes $ 19,998 $ 4,717 Interest expense 5,982 6,088 Depreciation and amortization 15,681 16,813 Merger and integration costs 1,687 4,441 Non-cash stock compensation expense 1,775 1,231 Acquisition costs 234 273 Other items (a) 1,823 — Adjusted EBITDA of other reconciling items 16,494 13,840 Adjusted EBITDA of geographic divisions reportable segment $ 63,674 $ 47,403 (a) Represents severance and executive search costs incurred in connection with the departure of the Company’s former chief executive officer and the search for his permanent replacement.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Schedule of basic and diluted EPS calculations	The basic and diluted EPS calculations for the three months ended March 31, 2018 and 2017 are presented below: Three Months Ended March 31, (in thousands, except per share amounts) 2018 2017 Income attributable to common stockholders $ 15,359 $ 3,744 Weighted average common shares outstanding, basic 67,138 66,692 Effect of dilutive securities: Restricted stock units 299 178 Stock options 172 233 Restricted stock 55 83 Weighted average common shares outstanding, diluted 67,664 67,186 Basic income per common share $ 0.23 $ 0.06 Diluted income per common share $ 0.23 $ 0.06
Schedule of anti-dilutive securities excluded from computation of earnings per share	The following table provides the securities that could potentially dilute EPS in the future, but were not included in the computation of diluted EPS for the periods presented because to do so would have been anti-dilutive. The amounts included in this table exclude performance-based restricted stock units. As of March 31, 2018 , the number of currently outstanding performance-based restricted stock units that are issued upon vesting could range from zero to a maximum of 0.4 million . Three Months Ended March 31, (in thousands) 2018 2017 Restricted stock units 21 21 Stock options — 303

Basis of Presentation Summary o

Basis of Presentation Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)
Organization Consolidation And Presentation [Line Items]
Deferred tax benefit, 2017 Tax Act	$ 3.6

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Details) - USD ($) $ in Thousands	Mar. 01, 2018	Mar. 27, 2017	Mar. 31, 2018	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Business Acquisition [Line Items]
Acquisition holdback				$ 1,460	$ 375
Goodwill			$ 263,999	263,999		$ 261,792
Transaction costs				234	$ 273
Shone Lumber [Member]
Business Acquisition [Line Items]
Date of acquisition	Mar. 1, 2018
Purchase price	$ 22,400
Acquisition holdback	1,500
Goodwill	2,200
Accounts receivable	6,400
Inventory	8,800
Property and equipment	3,100
Current liabilities	5,200
Pre-acquisition sales						$ 70,700
Transaction costs				$ 200
Net sales of acquiree since acquisition date			5,400
Estimated pre-tax earnings of acquiree since acquisition date			$ 300
Code Plus [Member]
Business Acquisition [Line Items]
Date of acquisition		Mar. 27, 2017
Purchase price		$ 7,100
Earnout provision		800
Goodwill		3,400
Customer relationships [Member] | Shone Lumber [Member]
Business Acquisition [Line Items]
Intangible assets	$ 7,100
Useful life	9 years
Customer relationships [Member] | Code Plus [Member]
Business Acquisition [Line Items]
Intangible assets		$ 2,300
Useful life		12 years
Non-compete agreements [Member] | Code Plus [Member]
Business Acquisition [Line Items]
Intangible assets		$ 500
Useful life		5 years

Accounts Receivable (Accounts R

Accounts Receivable (Accounts Receivable) (Details) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Trade receivables		$ 361,722	$ 333,954
Allowance for doubtful accounts		(5,333)	(4,771)
Sales returns allowance	[1]	0	(4,127)
Other allowances		(2,640)	(2,164)
Accounts receivable, net		$ 353,749	$ 322,892
[1]	Effective January 1, 2018, as part of the Company’s adoption of Topic 606, the Company has recorded a liability for estimated returns of inventory as a refund liability within accrued expenses and other liabilities. These balances were previously presented as an allowance within accounts receivable. See Note 6 for further details.

Debt (Debt Table) (Details)

Debt (Debt Table) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Sep. 15, 2016
Debt Instrument [Line Items]
Outstanding borrowings	$ 362,502	$ 354,798
Unamortized debt issuance costs related to senior secured notes	(5,430)	(5,639)
Total debt	357,072	349,159
Less: Current portion of long-term debt	101	100
Long-term debt	356,971	349,059
Senior secured notes, due 2024 [Member]
Debt Instrument [Line Items]
Outstanding borrowings	350,000	350,000	$ 350,000
Revolving credit agreement [Member]
Debt Instrument [Line Items]
Outstanding borrowings	12,191	4,462
Other debt [Member]
Debt Instrument [Line Items]
Outstanding borrowings	$ 311	$ 336

Debt Debt (Narrative) (Details)

Debt Debt (Narrative) (Details) - USD ($) $ in Thousands	Sep. 15, 2016	Dec. 01, 2015	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Outstanding borrowings			$ 362,502	$ 354,798
Senior secured notes, due 2024 [Member]
Debt Instrument [Line Items]
Debt issuance date	Sep. 15, 2016
Outstanding borrowings	$ 350,000		350,000	350,000
Maturity date, year	2,024
Interest rate	5.50%
Interest payment dates	payable semiannually on April 1 and October 1
Revolving credit agreement [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 375,000
Outstanding borrowings			12,191	4,462
Net availability			301,500
Letters of credit outstanding			$ 61,300
Date entered into agreement		Dec. 1, 2015
Other debt [Member]
Debt Instrument [Line Items]
Maturity date			Feb. 28, 2021
Outstanding borrowings			$ 311	$ 336
Interest rate			7.00%
Base Rate Option [Member] | Revolving credit agreement [Member]
Debt Instrument [Line Items]
Interest rate			5.00%
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 Revenue (Impact of Adop

Revenue Revenue (Impact of Adoption of Topic 606) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable, net of allowances	$ 353,749		$ 322,892
Inventories, net	338,767		309,060
Contract assets	36,613		0
Costs in excess of billings on uncompleted contracts	0		28,738
Prepaid expenses and other current assets	55,055		57,949
Total assets	1,543,508		1,473,350
Accrued expenses and other liabilities	83,052		96,262
Contract liabilities	29,089		0
Billings in excess of costs on uncompleted contracts	0		18,428
Total liabilities	779,933		726,451
Total liabilities and stockholders' equity	1,543,508		$ 1,473,350
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable, net of allowances		$ 314,008
Inventories, net		305,932
Contract assets		38,557
Costs in excess of billings on uncompleted contracts		0
Prepaid expenses and other current assets		61,077
Total assets		1,474,285
Accrued expenses and other liabilities		89,295
Contract liabilities		26,330
Billings in excess of costs on uncompleted contracts		0
Total liabilities		727,386
Total liabilities and stockholders' equity		1,474,285
Balances without adoption of Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable, net of allowances	361,631
Inventories, net	342,735
Contract assets	0
Costs in excess of billings on uncompleted contracts	26,912
Prepaid expenses and other current assets	51,087
Total assets	1,541,689
Accrued expenses and other liabilities	89,700
Contract liabilities	0
Billings in excess of costs on uncompleted contracts	20,622
Total liabilities	778,114
Total liabilities and stockholders' equity	1,541,689
Adoption of Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable, net of allowances	(7,882)	(8,884)
Inventories, net	(3,968)	(3,128)
Contract assets	36,613	38,557
Costs in excess of billings on uncompleted contracts	(26,912)	(28,738)
Prepaid expenses and other current assets	3,968	3,128
Total assets	1,819	935
Accrued expenses and other liabilities	(6,648)	(6,967)
Contract liabilities	29,089	26,330
Billings in excess of costs on uncompleted contracts	(20,622)	(18,428)
Total liabilities	1,819	935
Total liabilities and stockholders' equity	$ 1,819	$ 935

Revenue Revenue (Disaggregation

Revenue Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 834,202	$ 757,700
Single-family homebuilders [Member]
Disaggregation of Revenue [Line Items]
Net sales	637,308	559,589
Remodeling contractors [Member]
Disaggregation of Revenue [Line Items]
Net sales	95,451	82,075
Multi-family, commercial & other contractors [Member]
Disaggregation of Revenue [Line Items]
Net sales	101,443	116,036
Structural components [Member]
Disaggregation of Revenue [Line Items]
Net sales	135,829	109,891
Lumber & lumber sheet goods [Member]
Disaggregation of Revenue [Line Items]
Net sales	288,086	244,436
Millwork, doors & windows [Member]
Disaggregation of Revenue [Line Items]
Net sales	229,518	210,751
Other building products & services [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 180,769	$ 192,622

Revenue Revenue (Contract Asset

Revenue Revenue (Contract Assets and Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Receivables, including unbilled receivables	$ 360,696	$ 321,418
Receivables, including unbilled receivables change	39,278
Contract assets	36,613		$ 0
Contract assets change	(1,944)
Contract liabilities	29,089		$ 0
Contract liabilities change	$ 2,759

Revenue Revenue (Narrative) (De

Revenue Revenue (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue recognized for performance obligations satisfied over time	27.00%
Contract assets change	$ (1,944)
Contract liabilities change	2,759
Revenue recognized previously included in contract liabilities	$ 21,600
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative impact of adopting Topic 606 not recorded		$ 100

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Tax Contingency [Line Items]
Valuation allowance	$ 0.1		$ 0.1
Income tax expense at statutory rate	21.00%	35.00%
Effective income tax rate	23.20%	20.60%
Deferred tax benefit, 2017 Tax Act			$ 3.6

Commitments and Contingencies39

Commitments and Contingencies (Narrative) (Details) $ in Millions	Mar. 31, 2018USD ($)
Pending Litigation [Member]
Loss Contingencies [Line Items]
Pending litigation accrued	$ 3

Stock Based Compensation (Stock

Stock Based Compensation (Stock based compensation expense) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation		$ 1,775	$ 1,231
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	[1]	1,658	1,004
Restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation		91	136
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation		$ 26	$ 91
[1]	Includes service-based and performance-based restricted stock units.

Stock Based Compensation (Narra

Stock Based Compensation (Narrative) (Details) - Performance-based restricted stock units [Member] - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based shares available for vesting	0
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based shares available for vesting	400,000
2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting date	Mar. 31, 2021
Weighted average grant date fair value (in dollars per share)	$ 19.30
Award vesting period (in years)	3 years
Percent of performance measurement based on ROIC	50.00%
Percent of performance measurement based on Adjusted EPS	50.00%
Performance period (start date)	Jan. 1, 2018
Performance period (end date)	Dec. 31, 2020
2018 [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted	0
2018 [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted	200,000
2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting date		Mar. 31, 2020
Weighted average grant date fair value (in dollars per share)		$ 21.35
Award vesting period (in years)		3 years
Percent of performance measurement based on ROIC		50.00%
Percent of performance measurement based on Adjusted EPS		50.00%
Performance period (start date)		Jan. 1, 2017
Performance period (end date)		Dec. 31, 2019
2017 [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted		0
2017 [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted		200,000

Segments (Schedule of net sales

Segments (Schedule of net sales, adjusted EBITDA and certain other measures by reportable segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 834,202	$ 757,700
Gross profit	199,084	178,197
Depreciation & amortization	15,681	16,813
Operating segments [Member] | Geographic divisions [Member]
Segment Reporting Information [Line Items]
Net sales	834,202	757,700
Gross profit	199,084	178,197
Depreciation & amortization	15,211	16,227
Adjusted EBITDA	63,674	47,403
Other reconciling items [Member] | Other reconciling items [Member]
Segment Reporting Information [Line Items]
Net sales	0	0
Gross profit	0	0
Depreciation & amortization	470	586
Adjusted EBITDA	$ (16,494)	$ (13,840)

Segments (Reconciliation of adj

Segments (Reconciliation of adjusted EBITDA to consolidated financial statements) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Income before income taxes		$ 19,998	$ 4,717
Interest expense		5,982	6,088
Depreciation and amortization		15,681	16,813
Merger and integration costs		1,687	4,441
Non-cash stock compensation expense		1,775	1,231
Acquisition costs		234	273
Other items	[1]	1,823	0
Other reconciling items [Member] | Other reconciling items [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Depreciation and amortization		470	586
Adjusted EBITDA		16,494	13,840
Operating segments [Member] | Geographic divisions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Depreciation and amortization		15,211	16,227
Adjusted EBITDA		$ (63,674)	$ (47,403)
[1]	Represents severance and executive search costs incurred in connection with the departure of the Company’s former chief executive officer and the search for his permanent replacement.

Segments (Narrative) (Details)

Segments (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018segment
Segment Reporting [Abstract]
Number of reportable segments	1

Earnings Per Share (Basic and D

Earnings Per Share (Basic and Diluted EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Income attributable to common stockholders	$ 15,359	$ 3,744
Weighted average common shares outstanding, basic (in shares)	67,138	66,692
Weighted average common shares outstanding, diluted (in shares)	67,664	67,186
Basic income per common share (in dollars per share)	$ 0.23	$ 0.06
Diluted income per common share (in dollars per share)	$ 0.23	$ 0.06
Restricted stock units [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock based payment arrangements (in shares)	299	178
Stock options [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock based payment arrangements (in shares)	172	233
Restricted stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock based payment arrangements (in shares)	55	83

Earnings Per Share (Schedule of

Earnings Per Share (Schedule of anti-dilutive securities) (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
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)	21	21
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	303

Earnings Per Share Earnings Per

Earnings Per Share Earnings Per Share (Narrative) (Details) - Performance-based restricted stock units [Member]	3 Months Ended
	Mar. 31, 2018shares
Minimum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Performance-based shares available for vesting	0
Maximum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Performance-based shares available for vesting	400,000