Masonite International (DOOR) 10-Q 9 Aug 18 2018 Q2 Quarterly report Financial data

Document

Document - shares	6 Months Ended
	Jul. 01, 2018	Aug. 06, 2018
Entity [Abstract]
Entity Registrant Name	MASONITE INTERNATIONAL CORPORATION
Entity Central Index Key	893,691
Current Fiscal Year End Date	--12-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jul. 1, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		27,591,331

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Statement of Comprehensive Income [Abstract]
Net sales	$ 566,726	$ 519,741	$ 1,084,605	$ 1,006,922
Cost of goods sold	443,052	412,415	855,502	804,039
Gross profit	123,674	107,326	229,103	202,883
Selling, general and administration expenses	71,851	63,870	140,062	128,980
Restructuring costs, net	0	(700)	0	(407)
Loss (gain) on disposal of subsidiaries	0	(212)	0	(212)
Operating income (loss)	51,823	43,944	89,041	74,098
Interest expense (income), net	9,074	7,112	17,830	14,136
Other expense (income), net	(970)	(288)	(1,242)	(802)
Income (loss) from continuing operations before income tax expense (benefit)	43,719	37,120	72,453	60,764
Income tax expense (benefit)	7,894	8,932	14,595	7,253
Income (loss) from continuing operations	35,825	28,188	57,858	53,511
Income (loss) from discontinued operations, net of tax	(131)	(134)	(381)	(379)
Net income (loss)	35,694	28,054	57,477	53,132
Less: net income (loss) attributable to non-controlling interest	953	1,170	1,910	2,683
Net income (loss) attributable to Masonite	$ 34,741	$ 26,884	$ 55,567	$ 50,449
Earnings (loss) per common share attributable to Masonite:
Basic earnings per common share attributable to Masonite (in dollars per share)	$ 1.26	$ 0.90	$ 1.99	$ 1.69
Diluted earnings per common share attributable to Masonite (in dollars per share)	1.24	0.89	1.96	1.66
Earnings (loss) per common share from continuing operations attributable to Masonite:
Basic (in dollars per share)	1.26	0.91	2.01	1.70
Diluted (in dollars per share)	$ 1.24	$ 0.89	$ 1.97	$ 1.67
Other comprehensive income (loss):
Net income (loss)	$ 35,694	$ 28,054	$ 57,477	$ 53,132
Foreign currency translation gain (loss)	(31,445)	16,751	(25,671)	22,481
Amortization of actuarial net losses	299	292	599	584
Income tax benefit (expense) related to other comprehensive income (loss)	(100)	(55)	(200)	(812)
Other comprehensive income (loss), net of tax	(31,246)	16,988	(25,272)	22,253
Comprehensive income (loss)	4,448	45,042	32,205	75,385
Less: comprehensive income (loss) attributable to non-controlling interest	584	1,447	1,298	3,064
Comprehensive income (loss) attributable to Masonite	$ 3,864	$ 43,595	$ 30,907	$ 72,321

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 30,151	$ 176,669
Restricted cash	10,485	11,895
Accounts receivable, net	310,635	269,235
Inventories, net	244,424	234,042
Prepaid expenses	30,183	27,665
Income taxes receivable	2,083	2,364
Total current assets	627,961	721,870
Property, plant and equipment, net	590,998	573,559
Investment in equity investees	12,091	11,310
Goodwill	179,103	138,449
Intangible assets, net	229,209	182,484
Long-term deferred income taxes	27,184	29,899
Other assets, net	28,403	22,687
Total assets	1,694,949	1,680,258
Current liabilities:
Accounts payable	112,730	94,497
Accrued expenses	134,836	126,759
Income taxes payable	2,286	869
Total current liabilities	249,852	222,125
Long-term debt	625,579	625,657
Long-term deferred income taxes	77,017	60,820
Other liabilities	32,986	35,754
Total liabilities	985,434	944,356
Commitments and Contingencies (Note 9)
Equity:
Share capital: unlimited shares authorized, no par value, 27,597,126 and 28,369,877 shares issued and outstanding as of July 1, 2018, and December 31, 2017, respectively	614,371	624,403
Additional paid-in capital	219,931	226,528
Accumulated deficit	(2,023)	(18,150)
Accumulated other comprehensive income (loss)	(134,812)	(110,152)
Total equity attributable to Masonite	697,467	722,629
Equity attributable to non-controlling interests	12,048	13,273
Total equity	709,515	735,902
Total liabilities and equity	$ 1,694,949	$ 1,680,258

Condensed Consolidated Balance4

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - shares	Jul. 01, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Shares issued	27,597,126	28,369,877
Shares outstanding	27,597,126	28,369,877

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total Equity Attributable to Masonite	Equity Attributable to Noncontrolling Interests
Opening Balance, Shares at Jan. 01, 2017		29,774,784
Opening Balance, Value at Jan. 01, 2017	$ 659,776	$ 650,007	$ 234,926	$ (89,063)	$ (148,986)	$ 646,884	$ 12,892
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	156,981			151,739		151,739	5,242
Other comprehensive income (loss), net of tax	39,586				38,834	38,834	752
Dividends to non-controlling interests	(5,613)					0	(5,613)
Share based compensation expense	11,644		11,644			11,644
Common shares issued for delivery of share based awards, Shares		372,826
Common shares issued for delivery of share based awards, Value	0	$ 12,290	(12,290)			0
Common shares withheld to cover income taxes payable due to delivery of share based awards	(7,466)		(7,466)			(7,466)
Common shares issued under employee stock purchase plan		16,368
Common shares issued under employee stock purchase plan, value	882	$ 1,168	(286)			882
Common shares repurchased and retired, Shares		(1,794,101)
Common shares repurchased and retired, Value	$ (119,888)	$ (39,062)		(80,826)		(119,888)
Ending Balance, Shares at Dec. 31, 2017	28,369,877	28,369,877
Ending Balance, Value at Dec. 31, 2017	$ 735,902	$ 624,403	226,528	(18,150)	(110,152)	722,629	13,273
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	57,477			55,567		55,567	1,910
Other comprehensive income (loss), net of tax	(25,272)				(24,660)	(24,660)	(612)
Dividends to non-controlling interests	(2,523)					0	(2,523)
Share based compensation expense	6,603		6,603			6,603
Common shares issued for delivery of share based awards, Shares		181,397
Common shares issued for delivery of share based awards, Value	0	$ 10,698	(10,698)			0
Common shares withheld to cover income taxes payable due to delivery of share based awards	(2,423)		(2,423)			(2,423)
Common shares issued under employee stock purchase plan		7,386
Common shares issued under employee stock purchase plan, value	420	$ 499	(79)			420
Common shares repurchased and retired, Shares		(961,534)
Common shares repurchased and retired, Value	$ (60,669)	$ (21,229)		(39,440)		(60,669)
Ending Balance, Shares at Jul. 01, 2018	27,597,126	27,597,126
Ending Balance, Value at Jul. 01, 2018	$ 709,515	$ 614,371	$ 219,931	$ (2,023)	$ (134,812)	$ 697,467	$ 12,048

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017
Cash flows from operating activities:
Net income (loss)	$ 57,477	$ 53,132
Adjustments to reconcile net income (loss) to net cash flow provided by (used in) operating activities:
Loss (income) from discontinued operations, net of tax	381	379
Loss (gain) on disposal of subsidiaries	0	212
Depreciation	27,634	29,301
Amortization	13,910	11,566
Share based compensation expense	6,603	5,954
Deferred income taxes	7,234	5,652
Unrealized foreign exchange loss (gain)	(2,079)	776
Share of loss (income) from equity investees, net of tax	(781)	(829)
Pension and post-retirement expense (funding), net	(3,302)	(3,120)
Non-cash accruals and interest	457	644
Loss (gain) on sale of property, plant and equipment	2,512	141
Accounts receivable	(39,982)	(47,988)
Inventories	(2,799)	(19,497)
Prepaid expenses	(1,941)	(685)
Accounts payable and accrued expenses	27,623	17,965
Other assets and liabilities	(4,970)	(5,661)
Net cash flow provided by (used in) operating activities	87,977	47,942
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	1,367	802
Additions to property, plant and equipment	(33,835)	(35,497)
Cash used in acquisitions, net of cash acquired	(135,600)	0
Other investing activities	(1,825)	(1,952)
Net cash flow provided by (used in) investing activities	(169,893)	(36,647)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	0	746
Repayments of long-term debt	(196)	(239)
Proceeds from borrowings on revolving credit facilities	0	5,000
Tax witholding on share based awards	(2,423)	(6,167)
Distributions to non-controlling interests	(2,523)	(1,155)
Repurchases of common shares	(60,669)	(37,886)
Net cash flow provided by (used in) financing activities	(65,811)	(39,701)
Net foreign currency translation adjustment on cash	(201)	(1,962)
Increase (decrease) in cash, cash equivalents and restricted cash	(147,928)	(30,368)
Cash, cash equivalents and restricted cash, beginning of period	188,564	83,910
Cash, cash equivalents and restricted cash, at end of period	$ 40,636	$ 53,542

Business Overview and Significa

Business Overview and Significant Accounting Policies	6 Months Ended
	Jul. 01, 2018
Accounting Policies [Abstract]
Business Overview and Significant Accounting Policies	Business Overview and Significant Accounting Policies Unless we state otherwise or the context otherwise requires, references to "Masonite," "we," "our," "us" and the "Company" in these notes to the condensed consolidated financial statements refer to Masonite International Corporation and its subsidiaries. Description of Business Masonite International Corporation is one of the largest manufacturers of doors in the world, with significant market share in both interior and exterior door products. Masonite operates 67 manufacturing locations in 8 countries and sells doors to customers throughout the world, including the United States, Canada and the United Kingdom. Basis of Presentation We prepare these unaudited condensed consolidated financial statements in accordance with accounting principles generally accepted in the United States of America ("GAAP") and applicable rules and regulations of the U.S. Securities and Exchange Commission ("SEC") regarding interim financial reporting. Accordingly, they do not include all of the information and notes required by GAAP for annual financial statements. In the opinion of management, all adjustments consisting of normal and recurring entries considered necessary for a fair presentation of the results for the interim periods presented have been included. All significant intercompany balances and transactions have been eliminated. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect reported amounts in the financial statements and accompanying notes. These estimates are based on information available as of the date of the unaudited condensed consolidated financial statements; therefore, actual results could differ from those estimates. Interim results are not necessarily indicative of the results for a full year. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017, as filed with the SEC. Our fiscal year is the 52- or 53-week period ending on the Sunday closest to December 31. In a 52-week year, each fiscal quarter consists of 13 weeks. For ease of disclosure, the 13- and 26-week periods are referred to as three- and six-month periods, respectively. Certain prior year amounts have been reclassified to conform to the current basis of presentation, related to Accounting Standards Updates ("ASU") 2017-07 and 2016-18, as described below. Changes in Accounting Standards and Policies There have been no changes in the significant accounting policies from those that were disclosed in the fiscal year 2017 audited consolidated financial statements, other than as noted below. Adoption of Recent Accounting Pronouncements In March 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which amended Accounting Standards Codification ("ASC") 715, “Retirement Benefits”. This ASU required disaggregation of the service cost component from the other components of net benefit cost. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations. This standard was effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years; early adoption was permitted and retrospective application was required. We have utilized the practical expedient allowing the use of the prior years' disclosed service cost and other cost as the basis for our retrospective changes in presentation. The adoption of this standard changed the presentation of the other components of net benefit cost in our condensed consolidated statements of comprehensive income (loss), requiring the reclassification of a $0.3 million and $0.5 million benefit related to other components of net benefit cost out of previously-presented selling, general and administration expense and into previously presented other expense (income), net, for the three and six months ended July 2, 2017, respectively. The effect of this reclassification reduced previously-presented operating income by this amount for the same periods. The total benefit which will be reclassified for the years ended December 31, 2017, and January 1, 2017, will be $1.1 million and $0.5 million , respectively. In November 2016, the FASB issued ASU 2016-18, "Restricted Cash Flows", which amended ASC 230 "Statement of Cash Flows". This ASU clarified how entities should present restricted cash and restricted cash equivalents in the statement of cash flows. The new guidance requires entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. As a result, entities no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. This ASU was effective for annual periods beginning after December 15, 2017, and interim periods within those annual periods; early adoption was permitted and retrospective application was required. The adoption of this standard changed the presentation of restricted cash in our condensed consolidated statements of cash flows, which is now being combined with cash and cash equivalents, and had the effect of a $0.3 million decrease to previously-presented cash flow used in investing activities for the six months ended July 2, 2017. In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers," which created ASC 606, "Revenue from Contracts with Customers," and largely superseded the existing guidance of ASC 605, "Revenue Recognition." This standard outlined a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and superseded most current revenue recognition guidance, including industry-specific guidance. The core principle of the revenue model is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued ASU 2015-14, "Revenue from Contracts with Customers - Deferral of the Effective Date," and the guidance would now be effective for annual and interim periods beginning on or after December 15, 2017. We have adopted the guidance of ASC 606 as of January 1, 2018, using the modified retrospective method and have applied the standard to only those contracts which were not completed as of the transition date. The adoption of this standard did not have any material impact on revenues in the three months ended April 1, 2018. Prior period amounts were not adjusted and have continued to be reported in accordance with our historic accounting under Topic 605. While we considered an adjustment to opening retained earnings as prescribed by the modified retrospective method, there was no material adjustment ultimately required. Furthermore, there was no material difference between the prior period amounts as reported under ASC 605 and such amounts as would have been reported under ASC 606. Information about the nature, amount and timing of our revenues from contracts with customers is disclosed in Note 10. Revenues. Our accounting policy for revenue recognition is set forth below. Revenue Recognition Revenue from the sale of products is recognized when control of the promised goods is transferred to our customers based on the agreed-upon shipping terms, in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. Volume rebates, expected returns, discounts and other incentives to customers are considered variable consideration and we estimate these amounts based on the expected amount to be provided to customers and reduce the revenues we recognize accordingly. Sales taxes and value added taxes assessed by governmental entities are excluded from the measurement of consideration expected to be received. Shipping and handling costs incurred after a customer has taken possession of our goods are treated as a fulfillment cost and are not considered a separate performance obligation. Shipping and other transportation costs charged to customers are recorded in both revenues and cost of goods sold in the condensed consolidated statements of comprehensive income (loss). Other Recent Accounting Pronouncements not yet Adopted In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)", which will replace the existing guidance in ASC 840, "Leases." The updated standard aims to increase transparency and comparability among organizations by requiring lessees to recognize lease assets and lease liabilities on the balance sheet and requiring disclosure of key information about leasing arrangements. This ASU is effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods; early adoption is permitted and modified retrospective application is required. We are currently implementing a new lease system in connection with the adoption of ASU 2016-02. We are progressing with implementation and continuing to evaluate the impact on our consolidated financial statements and disclosures. We currently anticipate that the primary impact upon adoption will be a material adjustment to our consolidated balance sheets from the recognition, on a discounted basis, of our expected future payments for our operating leases, resulting in the recognition of right to use assets and lease obligations. Our current minimum undiscounted lease commitments under non-cancelable operating leases are disclosed in Note 9. Commitments and Contingencies.

Acquisitions and Disposition

Acquisitions and Disposition	6 Months Ended
	Jul. 01, 2018
Business Combinations [Abstract]
Acquisitions	Acquisitions and Disposition 2018 Acquisitions On June 1, 2018, we completed the acquisition of the operating assets of the wood door companies of AADG, Inc., which includes the brands Graham Manufacturing Corporation and The Maiman Company (collectively, "Graham & Maiman"). We acquired the operating assets of Graham & Maiman for cash consideration of $39.3 million . Graham & Maiman are based in Mason City, Iowa, and Springfield, Missouri. Graham & Maiman provide the non-residential construction industry with a full range of architectural premium and custom grade flush wood doors, architectural stile and rail wood doors, thermal-fused flush wood doors and wood door frames. The preliminary excess purchase price over the fair value of net assets acquired of $10.7 million was allocated to goodwill. The goodwill principally represents anticipated synergies to be gained from the integration into our existing Architectural business and the goodwill is deductible for tax purposes. On January 29, 2018, we completed the acquisition of DW3 Products Holdings Limited (“DW3”), a leading UK provider of high quality premium door solutions and window systems, supplying products under brand names such as Solidor, Residor, Nicedor and Residence. We acquired 100% of the equity interests in DW3 for cash consideration of $96.3 million , net of cash acquired. DW3 is based in Stoke-on-Trent and Gloucester, England, and their online quick ship capabilities and product portfolio both complement and expand the strategies we are pursuing with our business. The excess purchase price over the fair value of net assets acquired of $33.6 million was allocated to goodwill. The goodwill principally represents anticipated synergies to be gained from the integration into our existing United Kingdom business. This goodwill is not deductible for tax purposes and relates to the Europe segment. The fair value of assets acquired and liabilities assumed in the Graham & Maiman and DW3 acquisitions are as follows: (In thousands) Graham & Maiman DW3 Total 2018 Acquisitions Accounts receivable $ — $ 8,590 $ 8,590 Inventory 6,414 5,059 11,473 Property, plant and equipment 19,557 8,196 27,753 Goodwill 10,696 33,623 44,319 Intangible assets 2,750 62,873 65,623 Accounts payable and accrued expenses (126 ) (10,418 ) (10,544 ) Deferred income taxes — (11,546 ) (11,546 ) Other assets and liabilities, net — (68 ) (68 ) Cash consideration, net of cash acquired $ 39,291 $ 96,309 $ 135,600 The fair values of tangible assets acquired and liabilities assumed from the Graham & Maiman acquisition were based upon preliminary calculations and valuations and the estimates and assumptions are subject to change as we obtain additional information during the measurement period (up to one year from the acquisition date). The primary areas of the preliminary estimate which are not yet finalized relate to customer relationships, income tax liabilities and goodwill. The gross contractual value of acquired trade receivables was $9.1 million for the DW3 acquisition. The fair values of intangible assets acquired are based on management's estimates and assumptions including variations of the income approach, the cost approach and the market approach. The intangible assets acquired are not expected to have any residual value. During the three months ended July 1, 2018, we finalized the valuation of customer relationships, income tax liabilities and goodwill for the DW3 acquisition, which resulted in a difference in the purchase price allocation when compared to the previously-presented preliminary purchase price allocation. Intangible assets acquired from the 2018 Acquisitions consist of the following: (In thousands) Graham & Maiman Expected Useful Life (Years) DW3 Expected Useful Life (Years) Customer relationships $ 2,400 10.0 $ 49,554 10.0 Trademarks and trade names 350 1.5 11,785 10.0 Patents — 1,420 10.0 Other — 114 3.0 Total intangible assets acquired $ 2,750 $ 62,873 The following schedule represents the amounts of net sales and net income (loss) attributable to Masonite from the 2018 Acquisitions which have been included in the consolidated statements of comprehensive income (loss) for the periods indicated subsequent to the acquisition date. Three Months Ended July 1, 2018 (In thousands) Graham & Maiman DW3 Total 2018 Acquisitions Net sales $ 6,266 $ 18,351 $ 24,617 Net income (loss) attributable to Masonite 302 1,145 1,447 Six Months Ended July 1, 2018 (In thousands) Graham & Maiman DW3 Total 2018 Acquisitions Net sales $ 6,266 $ 29,549 $ 35,815 Net income (loss) attributable to Masonite 302 2,093 2,395 2017 Acquisition On October 2, 2017, we completed the acquisition of A&F Wood Products, Inc. (“A&F”), through the purchase of 100% of the equity interests in A&F and certain assets of affiliates of A&F for cash consideration of $13.8 million , net of cash acquired. A&F is based in Howell, Michigan, and is a wholesaler and fabricator of architectural and commercial doors in the Midwest United States. The excess purchase price over the fair value of net assets acquired of $5.9 million was allocated to goodwill. The goodwill principally represents anticipated synergies from A&F's integration into our existing Architectural door business. This goodwill is not deductible for tax purposes and relates to the Architectural segment. Additional information relating to the A&F acquisition is described in our Annual Report on Form 10-K for the year ended December 31, 2017. Pro Forma Information The following unaudited pro forma financial information represents the consolidated financial information as if the acquisitions had been included in our consolidated results beginning on the first day of the fiscal year prior to their respective acquisition dates. The pro forma results have been calculated after adjusting the results of the acquired entities to remove intercompany transactions and transaction costs incurred and to reflect the additional depreciation and amortization that would have been charged assuming the fair value adjustments to property, plant and equipment and intangible assets had been applied on the first day of the fiscal year prior to the respective acquisitions, together with the consequential tax effects. The pro forma results do not reflect any cost savings, operating synergies or revenue enhancements that the combined company may achieve as a result of the acquisitions; the costs to combine the companies' operations; or the costs necessary to achieve these costs savings, operating synergies and revenue enhancements. The pro forma results do not necessarily reflect the actual results of operations of the combined companies' under our ownership and operation. Three Months Ended July 1, 2018 (In thousands, except per share amounts) Masonite Graham & Maiman Historical Sales to 2018 Acquisitions Pro Forma Net sales $ 566,726 $ 11,288 $ (197 ) $ 577,817 Net income (loss) attributable to Masonite 34,741 (114 ) (22 ) 34,605 Basic earnings (loss) per common share $ 1.26 $ 1.25 Diluted earnings (loss) per common share 1.24 1.23 Three Months Ended July 2, 2017 (In thousands, except per share amounts) Masonite Graham & Maiman DW3 A&F Historical Sales to 2018 and 2017 Acquisitions Pro Forma Net sales $ 519,741 $ 17,604 $ 13,736 $ 3,672 $ (1,177 ) $ 553,576 Net income (loss) attributable to Masonite 26,884 (111 ) 575 371 (73 ) 27,646 Basic earnings (loss) per common share $ 0.90 $ 0.93 Diluted earnings (loss) per common share 0.89 0.91 Six Months Ended July 1, 2018 (In thousands, except per share amounts) Masonite Graham & Maiman DW3 Historical Sales to 2018 Acquisitions Pro Forma Net sales $ 1,084,605 $ 26,887 $ 4,918 $ (651 ) $ 1,115,759 Net income (loss) attributable to Masonite 55,567 89 81 (63 ) 55,674 Basic earnings (loss) per common share $ 1.99 $ 2.00 Diluted earnings (loss) per common share 1.96 1.96 Six Months Ended July 2, 2017 (In thousands, except per share amounts) Masonite Graham & Maiman DW3 A&F Historical Sales to 2018 and 2017 Acquisitions Pro Forma Net sales $ 1,006,922 $ 34,440 $ 26,430 $ 6,812 $ (3,441 ) $ 1,071,163 Net income (loss) attributable to Masonite 50,449 54 442 564 (170 ) 51,339 Basic earnings (loss) per common share $ 1.69 $ 1.72 Diluted earnings (loss) per common share 1.66 1.69 Disposition On June 28, 2017, we completed the liquidation of our legal entity in Hungary. As a result, we recognized $0.2 million of cumulative translation adjustment in loss (gain) on disposal of subsidiaries from accumulated other comprehensive income during the three months ended July 2, 2017.

Accounts Receivable

Accounts Receivable	6 Months Ended
	Jul. 01, 2018
Receivables [Abstract]
Accounts Receivable	Accounts Receivable Our customers consist mainly of wholesale distributors, dealers, homebuilders and retail home centers. Our ten largest customers accounted for 52.4% and 56.2% of total accounts receivable as of July 1, 2018 , and December 31, 2017 , respectively. Our largest customer, The Home Depot, Inc., accounted for more than 10% of the consolidated gross accounts receivable balance as of July 1, 2018 , and December 31, 2017 . Our second largest customer, Lowe's Co. Inc., accounted for more than 10% of the consolidated gross accounts receivable balance as of December 31, 2017 . The allowance for doubtful accounts balance was $1.6 million and $1.8 million as of July 1, 2018 , and December 31, 2017 , respectively. We maintain an accounts receivable sales program with a third party (the "AR Sales Program"). Under the AR Sales Program, we can transfer ownership of eligible trade accounts receivable of certain customers. Receivables are sold outright to a third party that assumes the full risk of collection, without recourse to us in the event of a loss. Transfers of receivables under this program are accounted for as sales. Proceeds from the transfers reflect the face value of the accounts receivable less a discount. Receivables sold under the AR Sales Program are excluded from trade accounts receivable in the condensed consolidated balance sheets and are included in cash flows from operating activities in the condensed consolidated statements of cash flows. The discounts on the sales of trade accounts receivable sold under the AR Sales Program were not material for any of the periods presented and were recorded in selling, general and administration expense within the condensed consolidated statements of comprehensive income (loss).

Inventories

Inventories	6 Months Ended
	Jul. 01, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories The amounts of inventory on hand were as follows as of the dates indicated: (In thousands) July 1, December 31, Raw materials $ 174,919 $ 172,960 Finished goods 77,593 68,851 Provision for obsolete or aged inventory (8,088 ) (7,769 ) Inventories, net $ 244,424 $ 234,042

Property, Plant and Equipment

Property, Plant and Equipment	6 Months Ended
	Jul. 01, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment The carrying amounts of our property, plant and equipment and accumulated depreciation were as follows as of the dates indicated: (In thousands) July 1, December 31, Land $ 29,037 $ 26,790 Buildings 178,535 176,077 Machinery and equipment 688,407 661,026 Property, plant and equipment, gross 895,979 863,893 Accumulated depreciation (304,981 ) (290,334 ) Property, plant and equipment, net $ 590,998 $ 573,559 Total depreciation expense was $13.7 million and $27.6 million in the three and six months ended July 1, 2018 , respectively, and $15.3 million and $29.3 million in the three and six months ended July 2, 2017 , respectively. Depreciation expense is included primarily within cost of goods sold in the condensed consolidated statements of comprehensive income (loss).

Goodwill and Intangbile Assets

Goodwill and Intangbile Assets	6 Months Ended
	Jul. 01, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Changes in the carrying amount of goodwill were as follows as of the dates indicated: (In thousands) North American Residential Europe Architectural Total December 31, 2017 $ 2,867 $ 35,431 $ 100,151 $ 138,449 Goodwill from 2018 acquisitions — 33,623 10,696 44,319 Foreign exchange fluctuations (20 ) (3,461 ) (184 ) (3,665 ) July 1, 2018 $ 2,847 $ 65,593 $ 110,663 $ 179,103 The cost and accumulated amortization values of our intangible assets were as follows as of the dates indicated: July 1, 2018 (In thousands) Cost Accumulated Amortization Translation Adjustment Net Book Value Definite life intangible assets: Customer relationships $ 212,282 $ (89,735 ) $ (15,892 ) $ 106,655 Patents 33,885 (22,814 ) (938 ) 10,133 Software 34,933 (31,860 ) (201 ) 2,872 Trademarks and tradenames 15,155 (2,895 ) (845 ) 11,415 Other 12,340 (10,399 ) (1,784 ) 157 Total definite life intangible assets 308,595 (157,703 ) (19,660 ) 131,232 Indefinite life intangible assets: Trademarks and tradenames 108,572 — (10,595 ) 97,977 Total intangible assets $ 417,167 $ (157,703 ) $ (30,255 ) $ 229,209 December 31, 2017 (In thousands) Cost Accumulated Amortization Translation Adjustment Net Book Value Definite life intangible assets: Customer relationships $ 160,327 $ (79,628 ) $ (11,338 ) $ 69,361 Patents 31,999 (21,768 ) (686 ) 9,545 Software 33,574 (31,183 ) (190 ) 2,201 Other 15,246 (11,836 ) (1,781 ) 1,629 Total definite life intangible assets 241,146 (144,415 ) (13,995 ) 82,736 Indefinite life intangible assets: Trademarks and tradenames 108,572 — (8,824 ) 99,748 Total intangible assets $ 349,718 $ (144,415 ) $ (22,819 ) $ 182,484 Amortization of intangible assets was $7.2 million and $13.3 million for the three and six months ended July 1, 2018 , respectively, and $6.0 million and $11.9 million for the three and six months ended July 2, 2017 , respectively. Amortization expense is classified within selling, general and administration expenses in the condensed consolidated statements of comprehensive income (loss). The estimated future amortization of intangible assets with definite lives as of July 1, 2018 , is as follows: (In thousands) Fiscal year: 2018 (remaining six months) $ 13,198 2019 24,980 2020 20,218 2021 16,992 2022 13,520

Accrued Expenses

Accrued Expenses	6 Months Ended
	Jul. 01, 2018
Accrued Expenses [Abstract]
Accrued expenses	Accrued Expenses The details of our accrued expenses were as follows as of the dates indicated: (In thousands) July 1, December 31, Accrued payroll $ 43,137 $ 38,296 Accrued rebates 32,744 34,488 Accrued interest 10,987 10,688 Other accruals 47,968 43,287 Total accrued expenses $ 134,836 $ 126,759

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jul. 01, 2018
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt (In thousands) July 1, December 31, 5.625% senior unsecured notes due 2023 $ 625,000 $ 625,000 Unamortized premium on 2023 Notes 5,167 5,714 Debt issuance costs for 2023 Notes (5,889 ) (6,635 ) Capital lease obligations 176 378 Other long-term debt 1,125 1,200 Total long-term debt $ 625,579 $ 625,657 Interest expense related to our consolidated indebtedness under senior unsecured notes was $8.9 million and $17.6 million for the three and six months ended July 1, 2018 , respectively, and $6.9 million and $13.9 million for the three and six months ended July 2, 2017 , respectively. 5.625% Senior Notes due 2023 On September 27, 2017, and March 23, 2015, we issued $150.0 million and $475.0 million aggregate principal senior unsecured notes, respectively (the "2023 Notes"). The 2023 Notes were issued in two private placements for resale to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the "Securities Act"), and to buyers outside the United States pursuant to Regulation S under the Securities Act. The 2023 Notes were issued without registration rights and are not listed on any securities exchange. The 2023 Notes bear interest at 5.625% per annum, payable in cash semiannually in arrears on March 15 and September 15 of each year and are due March 15, 2023. The 2023 Notes were issued at 104.0% and par in 2017 and 2015, respectively, and the resulting premium of $6.0 million is being amortized to interest expense over the term of the 2023 Notes using the effective interest method. We received net proceeds of $153.9 million and $467.9 million , respectively, after deducting $2.1 million and $7.1 million of debt issuance costs in 2017 and 2015, respectively. The debt issuance costs were capitalized as a reduction to the carrying value of debt and are being accreted to interest expense over the term of the 2023 Notes using the effective interest method. The net proceeds from the 2017 issuance of the 2023 Notes are for general corporate purposes. The net proceeds from the 2015 issuance of the 2023 Notes, together with available cash balances, were used to redeem $500.0 million aggregate principal of prior 8.25% senior unsecured notes due 2021 and to pay related premiums, fees and expenses. Obligations under the 2023 Notes are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis, by certain of our directly or indirectly wholly-owned subsidiaries. We may redeem the 2023 Notes, in whole or in part, at any time on or after March 15, 2018, at the applicable redemption prices specified under the indenture governing the 2023 Notes, plus accrued and unpaid interest, if any, to the date of redemption. If we experience certain changes of control or consummate certain asset sales and do not reinvest the net proceeds, we must offer to repurchase all of the 2023 Notes at a purchase price of 101.00% of their principal amount, plus accrued and unpaid interest, if any, to the repurchase date. The indenture governing the 2023 Notes contains restrictive covenants that, among other things, limit our ability and the ability of our subsidiaries to: (i) incur additional debt and issue disqualified or preferred stock, (ii) make restricted payments, (iii) sell assets, (iv) create or permit restrictions on the ability of our restricted subsidiaries to pay dividends or make other distributions to the parent company, (v) create or incur certain liens, (vi) enter into sale and leaseback transactions, (vii) merge or consolidate with other entities and (viii) enter into transactions with affiliates. The foregoing limitations are subject to exceptions as set forth in the indenture governing the 2023 Notes. In addition, if in the future the 2023 Notes have an investment grade rating from at least two nationally recognized statistical rating organizations, certain of these covenants will be replaced with a less restrictive covenant. The indenture governing the 2023 Notes contains customary events of default (subject in certain cases to customary grace and cure periods). As of July 1, 2018 , and December 31, 2017 , we were in compliance with all covenants under the indenture governing the 2023 Notes. ABL Facility On April 9, 2015, we and certain of our subsidiaries entered into a $150.0 million asset-based revolving credit facility (the "ABL Facility") maturing on April 9, 2020. The borrowing base is calculated based on a percentage of the value of selected U.S. and Canadian accounts receivable and inventory, less certain ineligible amounts. Obligations under the ABL Facility are secured by a first priority security interest in certain of the current assets of Masonite's United States and Canadian subsidiaries. In addition, obligations under the ABL Facility are fully and unconditionally guaranteed, jointly and severally, on a senior secured basis, by certain of our directly or indirectly wholly-owned subsidiaries. Borrowings under the ABL Facility bear interest at a rate equal to, at our option, (i) the Base Rate, Canadian Prime Rate or Canadian Base Rate (each as defined in the Amended and Restated Credit Agreement) plus a margin ranging from 0.25% to 0.75% per annum, or (ii) the Eurodollar Base Rate or BA Rate (each as defined in the Amended and Restated Credit Agreement), plus a margin ranging from 1.25% to 1.75% per annum. In addition to paying interest on any outstanding principal under the ABL Facility a commitment fee is payable on the undrawn portion of the ABL Facility in an amount equal to 0.25% per annum of the average daily balance of unused commitments during each calendar quarter. The ABL Facility contains various customary representations, warranties and covenants by us that, among other things, and subject to certain exceptions, restrict Masonite's ability and the ability of our subsidiaries to: (i) pay dividends on our common shares and make other restricted payments, (ii) make investments and acquisitions, (iii) engage in transactions with our affiliates, (iv) sell assets, (v) merge and (vi) create liens. The Amended and Restated Credit Agreement amended the ABL Facility to, among other things, (i) permit us to incur unlimited unsecured debt as long as such debt does not contain covenants or default provisions that are more restrictive than those contained in the ABL Facility, (ii) permit us to incur debt as long as the pro forma secured leverage ratio is less than 4.5 to 1.0 , and (iii) add certain additional exceptions and exemptions under the restricted payment, investment and indebtedness covenants (including increasing the amount of certain debt permitted to be incurred under an existing exception). As of July 1, 2018 , and December 31, 2017 , we were in compliance with all covenants under the credit agreement governing the ABL Facility and there were no amounts outstanding under the ABL Facility.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jul. 01, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Leases For lease agreements that provide for escalating rent payments or rent-free occupancy periods, we recognize rent expense on a straight line basis over the non-cancelable lease term and any option renewal period where failure to exercise such option would result in an economic penalty in such amount that renewal appears, at the inception of the lease, to be reasonably assured. The lease term commences on the date when all conditions precedent to our obligation to pay rent are satisfied. The leases contain provisions for renewal ranging from zero to three options of generally five years each. Minimum payments, for the following future periods, under non-cancelable operating leases and service agreements with initial or remaining terms of one year or more consist of the following: (In thousands) Fiscal year: 2018 (remaining six months) $ 12,615 2019 23,197 2020 21,409 2021 16,672 2022 12,523 Thereafter 55,818 Total future minimum lease payments $ 142,234 Total rent expense, including non-cancelable operating leases and month-to-month leases, was $7.8 million and $15.5 million for the three and six months ended July 1, 2018 , respectively, and $7.2 million and $14.3 million for the three and six months ended July 2, 2017 , respectively. We have provided customary indemnifications to our landlords under certain property lease agreements for claims by third parties in connection with their use of the premises. We also have provided routine indemnifications against adverse effects related to changes in tax laws and patent infringements by third parties. The maximum amount of these indemnifications cannot be reasonably estimated due to their nature. In some cases, we have recourse against other parties to mitigate the risk of loss from these indemnifications. Historically, we have not made any significant payments relating to such indemnifications. Legal Proceedings The following discussion describes material developments in previously disclosed legal proceedings that occurred since December 31, 2017. Refer to Note 9. Commitments and Contingencies in the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2017, for a full description of these pending legal proceedings. Mathis In the Mathis matter, on March 29, 2018, and before any responsive pleadings were filed, the parties entered into a Settlement Agreement and General Release pursuant to which we made a nominal settlement payment in exchange for a general release and the lawsuit was dismissed with prejudice on April 23, 2018. In entering into the settlement, we denied all claims made in the lawsuit and denied any wrongdoing. Byrd In the Byrd matter, on March 22, 2018 the settlement previously agreed to by the parties received final court approval and the court dismissed the case. Payment of the settlement occurred on April 27, 2018. Payouts to class members were initiated on May 16, 2018. However, the court can reassert jurisdiction to enforce the settlement until the payout process is determined to be complete. The amount we paid as part of the settlement did not have a material impact on our financial condition or operating results. In addition, from time to time, we are involved in various claims, legal actions and government audits. In the opinion of management, the ultimate disposition of these matters, individually and in the aggregate, will not have a material effect on our financial condition, results of operations or cash flows.

Revenues

Revenues	6 Months Ended
	Jul. 01, 2018
Revenue from Contract with Customer [Abstract]
Revenues	Revenues We derive our revenues primarily from the manufacture and delivery of doors and door components as performance obligations that arise from our contracts with customers are satisfied. Materially all of our revenues are generated from contracts with customers and the nature, timing and any uncertainty in the recognition of revenues are not affected by the type of good, customer or geographical region to which the performance obligation relates. Our contracts with our customers are generally in the form of purchase orders and the performance obligation arises upon receipt of the purchase order and agreement upon the transaction price. The performance obligations are satisfied at a point in time when control of the promised goods is transferred to the customer and payment terms vary from customer to customer. Payment terms are short-term, are customary for our industry and in some cases, early payment incentives are offered. The transaction price recognized as revenue and accounts receivable is determined based upon a number of estimates, including: • Incentive-based volume rebates, which are based on individual rebate agreements with our customers, as well as historical and expected performance of each individual customer, • Estimated sales returns, which are based on historical returns as a percentage of revenues, and • Adjustments for early payment discounts offered by us. Contract assets are represented by our trade accounts receivable balances on the condensed consolidated balance sheets, and are described in Note 3. Accounts Receivable. There were no other material contract assets or liabilities as of either July 1, 2018 , or December 31, 2017 . Our warranties are assurance-type warranties and do not represent separate performance obligations to our customers. There were no material impairment losses related to contract assets during the three or six months ended July 1, 2018 , or July 2, 2017 .

Share Based Compensation Plans

Share Based Compensation Plans	6 Months Ended
	Jul. 01, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share Based Compensation Plans	Share Based Compensation Plans Share based compensation expense was $3.5 million and $6.6 million for the three and six months ended July 1, 2018 , respectively, and $3.5 million and $6.0 million for the three and six months ended July 2, 2017 , respectively. As of July 1, 2018 , the total remaining unrecognized compensation expense related to share based compensation amounted to $20.1 million , which will be amortized over the weighted average remaining requisite service period of 1.9 years. Share based compensation expense is recognized using a graded-method approach, or to a lesser extent a cliff-vesting approach, depending on the terms of the individual award and is classified within selling, general and administration expenses in the condensed consolidated statements of comprehensive income (loss). All share based awards are settled through issuance of new shares of our common stock. The share based award agreements contain restrictions on sale or transfer other than in limited circumstances. All other transfers would cause the share based awards to become null and void. Equity Incentive Plans Prior to July 9, 2012 , we had a management equity incentive plan (the "2009 Plan"). The 2009 Plan required granting by June 9, 2012, equity instruments which upon exercise would result in management (excluding directors) owning 9.55% of our common equity ( 3,554,811 shares) on a fully diluted basis, after giving consideration to the potential exercise of warrants and the equity instruments granted to directors. Under the 2009 Plan, we were required to issue equity instruments to directors that represented 0.90% ( 335,004 shares) of the common equity on a fully diluted basis. The requirement for issuance to employees was satisfied in June 2012, and the requirement for issuance to directors was satisfied in July 2009. No awards have been granted under the 2009 Plan since May 30, 2012, and no future awards will be granted under the 2009 Plan; however, all outstanding awards under the 2009 Plan will continue to be governed by their existing terms. Aside from shares issuable for outstanding awards, there are no further shares of common stock available for future issuance under the 2009 Plan. On July 12, 2012 , the Board of Directors adopted the Masonite International Corporation 2012 Equity Incentive Plan, which was amended on June 21, 2013, by our Board of Directors, further amended and restated by our Board of Directors on February 23, 2015, and approved by our shareholders on May 12, 2015 (as amended and restated, the "2012 Plan"). The 2012 Plan was adopted because the Board believes awards granted will help to attract, motivate and retain employees and non-employee directors, align employee and stockholder interests and encourage a performance-based culture built on employee stock ownership. The 2012 Plan permits us to offer eligible directors, employees and consultants cash and share-based incentives, including stock options, stock appreciation rights, restricted stock, other share-based awards (including restricted stock units) and cash-based awards. The 2012 Plan is effective for ten years from the date of its adoption. Awards granted under the 2012 Plan are at the discretion of the Human Resources and Compensation Committee of the Board of Directors. The Human Resources and Compensation Committee may grant any award under the 2012 Plan in the form of a performance award. The 2012 Plan may be amended, suspended or terminated by the Board at any time; provided, that any amendment, suspension or termination which impairs the rights of a participant is subject to such participant's consent and; provided further, that certain material amendments are subject to shareholder approval. The aggregate number of common shares that can be issued with respect to equity awards under the 2012 Plan cannot exceed 2,000,000 shares plus the number of shares subject to existing grants under the 2009 Plan that may expire or be forfeited or cancelled. As of July 1, 2018 , there were 735,644 shares of common stock available for future issuance under the 2012 Plan. Deferred Compensation Plan We offer to certain of our employees and directors a Deferred Compensation Plan ("DCP"). The DCP is an unfunded non-qualified deferred compensation plan that permits those certain employees and directors to defer a portion of their compensation to a future time. Eligible employees may elect to defer a portion of their base salary, bonus and/or restricted stock units and eligible directors may defer a portion of their director fees or restricted stock units. All contributions to the DCP on behalf of the participant are fully vested (other than restricted stock unit deferrals which remain subject to the vesting terms of the applicable equity incentive plan) and placed into a grantor trust, commonly referred to as a "rabbi trust." Although we are permitted to make matching contributions under the terms of the DCP, we have not elected to do so. The DCP invests the contributions in diversified securities from a selection of investments and the participants choose their investments and may periodically reallocate the assets in their respective accounts. Participants are entitled to receive the benefits in their accounts upon separation of service or upon a specified date, with benefits payable as a single lump sum or in annual installments. All plan investments are categorized as having Level 1 valuation inputs as established by the FASB’s Fair Value Framework. Assets of the rabbi trust, other than Company stock, are recorded at fair value and included in other assets in the condensed consolidated balance sheets. These assets in the rabbi trust are classified as trading securities and changes in their fair values are recorded in other income (loss) in the condensed consolidated statements of comprehensive income (loss). The liability relating to deferred compensation represents our obligation to distribute funds to the participants in the future and is included in other liabilities in the condensed consolidated balance sheets. As of July 1, 2018 , the liability and asset relating to deferred compensation each had a fair value of $6.2 million . Any unfunded gain or loss relating to changes in the fair value of the deferred compensation liability is recognized in selling, general and administration expense in the condensed consolidated statements of comprehensive income (loss). As of July 1, 2018 , participation in the deferred compensation plan is limited and no restricted stock awards have been deferred into the deferred compensation plan. Stock Appreciation Rights We have granted Stock Appreciation Rights ("SARs") to certain employees under both the 2009 Plan and the 2012 Plan, which entitle the recipient to the appreciation in value of a number of common shares over the exercise price over a period of time, each as specified in the applicable award agreement. The exercise price of any SAR granted may not be less than the fair market value of our common shares on the date of grant. The compensation expense for the SARs is measured based on the fair value of the SARs at the date of grant and is recognized over the requisite service period. The SARs vest over a maximum of three years, have a life of ten years and settle in common shares. We recognize forfeitures of SARs in the period in which they occur. The total fair value of SARs vested was $0.7 million and $0.4 million during the six months ended July 1, 2018 , and July 2, 2017 , respectively. Six Months Ended July 1, 2018 Stock Appreciation Rights Aggregate Intrinsic Value (in thousands) Weighted Average Exercise Price Average Remaining Contractual Life (Years) Outstanding, beginning of period 537,930 $ 23,263 $ 32.00 4.5 Granted 69,752 65.00 Exercised (25,725 ) 1,288 19.82 Outstanding, end of period 581,957 $ 20,839 $ 36.49 4.8 Exercisable, end of period 459,072 $ 20,085 $ 28.30 3.6 Six Months Ended July 2, 2017 Stock Appreciation Rights Aggregate Intrinsic Value (in thousands) Weighted Average Exercise Price Average Remaining Contractual Life (Years) Outstanding, beginning of period 790,290 $ 32,659 $ 24.47 4.6 Granted 59,265 77.00 Exercised (191,593 ) 11,453 18.93 Forfeited (10,357 ) 64.32 Outstanding, end of period 647,605 $ 29,365 $ 30.29 4.6 Exercisable, end of period 545,422 $ 28,573 $ 23.11 3.9 The value of SARs granted is determined using the Black-Scholes Merton valuation model, and the corresponding expense is recognized over the average requisite service period of 2.0 years for all periods presented. Expected volatility is based upon the historical volatility of our public industry peers’ common shares amongst other considerations. The expected term is calculated using the simplified method, due to insufficient exercise activity during recent years as a basis from which to estimate future exercise patterns. The weighted average grant date assumptions used for the SARs granted were as follows for the periods indicated: 2018 Grants 2017 Grants SAR value (model conclusion) $ 18.63 $ 22.65 Risk-free rate 2.7 % 2.0 % Expected dividend yield 0.0 % 0.0 % Expected volatility 22.8 % 25.8 % Expected term (years) 6.0 6.0 Restricted Stock Units We have granted Restricted Stock Units ("RSUs") to directors and certain employees under both the 2009 Plan and the 2012 Plan. The RSUs confer the right to receive shares of our common stock at a specified future date or when certain conditions are met. The compensation expense for the RSUs awarded is based on the fair value of the RSUs at the date of grant and is recognized over the requisite service period. The RSUs vest over a maximum of three years and call for the underlying shares to be delivered no later than 30 days following the vesting date unless the participant is subject to a blackout period. In such case, the shares are to be delivered once the blackout restriction has been lifted. We recognize forfeitures of RSUs in the period in which they occur. Six Months Ended July 1, 2018 July 2, 2017 Total Restricted Stock Units Outstanding Weighted Average Grant Date Fair Value Total Restricted Stock Units Outstanding Weighted Average Grant Date Fair Value Outstanding, beginning of period 417,598 $ 66.14 501,926 $ 58.51 Granted 276,647 63.02 227,992 70.62 Delivered (162,529 ) (186,312 ) Withheld to cover (1) (41,557 ) (54,638 ) Forfeited (9,831 ) (31,726 ) Outstanding, end of period 480,328 $ 65.52 457,242 $ 65.68 ____________ (1) A portion of the vested RSUs delivered were net share settled to cover statutory requirements for income and other employment taxes. We remit the equivalent cash to the appropriate taxing authorities. These net share settlements had the effect of share repurchases by us as we reduced and retired the number of shares that would have otherwise been issued as a result of the vesting. Approximately one-half of the RSUs granted during the six months ended July 1, 2018 , vest at specified future dates with only service requirements, while the remaining portion of the RSUs vest based on both performance and service requirements. The expense for RSUs granted in the six months ended July 1, 2018 , and July 2, 2017 , is being recognized over the weighted average requisite service period of 2.6 and 2.7 years, respectively. During the six months ended July 1, 2018 , there were 204,086 RSUs vested at a fair value of $13.1 million .

Restructuring Costs

Restructuring Costs	6 Months Ended
	Jul. 01, 2018
Restructuring and Related Activities [Abstract]
Restructuring Costs	Restructuring Costs Restructuring costs were not material in the three or six months ended July 1, 2018 . The following table summarizes the restructuring charges recorded for the periods indicated: Three Months Ended July 2, 2017 (In thousands) Europe Architectural Corporate & Other Total 2016 Plan $ — $ 503 $ — $ 503 2015 Plan (96 ) — 24 (72 ) 2014 Plan — — (1,131 ) (1,131 ) Total Restructuring Costs $ (96 ) $ 503 $ (1,107 ) $ (700 ) Six Months Ended July 2, 2017 (In thousands) Europe Architectural Corporate & Other Total 2016 Plan $ — $ 774 $ — $ 774 2015 Plan (96 ) — 46 (50 ) 2014 Plan — — (1,131 ) (1,131 ) Total Restructuring Costs $ (96 ) $ 774 $ (1,085 ) $ (407 ) Cumulative Amount Incurred Through July 1, 2018 (In thousands) North American Residential Europe Architectural Corporate & Other Total 2016 Plan $ — $ — $ 3,707 $ — $ 3,707 2015 Plan — 2,335 — 3,274 5,609 2014 Plan — — — 7,993 7,993 2013 Plan 3,025 2,733 — 2,157 7,915 2012 and Prior Plans 2,378 12,668 — 3,609 18,655 Total Restructuring Costs $ 5,403 $ 17,736 $ 3,707 $ 17,033 $ 43,879 Our restructuring plans initiated in 2016 and prior years are described in detail in our Annual Report on Form 10-K for the year ended December 31, 2017. Costs associated with our existing restructuring plans include severance and closure charges and are substantially completed. The 2013 Plan also included impairment of certain property, plant and equipment. Actions associated with all of our existing restructuring plans are substantially completed, although cash payments are expected to continue through 2019, primarily related to lease payments at closed facilities under our restructuring plans initiated in 2012 and prior years. As of July 1, 2018 , we do not expect to incur any material future charges relating to any of our existing restructuring plans. The changes in the accrual for restructuring by activity were as follows for the periods indicated: (In thousands) December 31, Cash Payments July 1, 2016 Plan $ 90 $ 90 $ — 2012 and Prior Plans 194 70 124 Total $ 284 $ 160 $ 124 (In thousands) January 1, Severance Closure Costs Cash Payments July 2, 2016 Plan $ 1,300 $ 271 $ 503 $ 1,173 $ 901 2015 Plan 282 46 (96 ) 86 146 2014 Plan 426 — (1,131 ) (1,119 ) 414 2012 and Prior Plans 465 — — 95 370 Total $ 2,473 $ 317 $ (724 ) $ 235 $ 1,831

Income Taxes

Income Taxes	6 Months Ended
	Jul. 01, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rate differs from the Canadian statutory rate of 26.5% primarily due to changes in our valuation allowances, tax exempt income and mix of earnings in foreign jurisdictions which are subject to tax rates that differ from the Canadian statutory rate. In addition, we recognized $0.1 million and $0.3 million of income tax benefit due to the exercise and delivery of share-based awards during the three and six months ended July 1, 2018 , and $0.1 million and $5.1 million during the three and six months ended July 2, 2017 . In accordance with SAB 118, we have reflected the income tax effects of the aspects of the Tax Cuts and Jobs Act of 2017 ("Tax Reform") for which the accounting under ASC 740 is complete. Our provision for income taxes does include estimates around the timing of certain deductions. To the extent those estimates change, there could be effects to income tax expense due to the change in the tax rate. We would expect to be complete with this analysis upon filing of our tax return in 2018. Additionally, the final impact of Tax Reform may differ from our estimates due to additional regulations that may be issued or changes in interpretations as we gain a more thorough understanding of the tax law. These changes could be material to income tax expense.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jul. 01, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share ("EPS") is calculated by dividing earnings attributable to Masonite by the weighted-average number of our common shares outstanding during the period. Diluted EPS is calculated by dividing earnings attributable to Masonite by the weighted-average number of common shares plus the incremental number of shares issuable from non-vested and vested RSUs and SARs outstanding during the period. (In thousands, except share and per share information) Three Months Ended Six Months Ended July 1, 2018 July 2, 2017 July 1, 2018 July 2, 2017 Net income (loss) attributable to Masonite $ 34,741 $ 26,884 $ 55,567 $ 50,449 Less: income (loss) from discontinued operations, net of tax (131 ) (134 ) (381 ) (379 ) Income (loss) from continuing operations attributable to Masonite $ 34,872 $ 27,018 $ 55,948 $ 50,828 Shares used in computing basic earnings per share 27,609,132 29,789,955 27,899,461 29,825,527 Effect of dilutive securities: Incremental shares issuable under share compensation plans and warrants 420,454 568,283 502,753 609,057 Shares used in computing diluted earnings per share 28,029,586 30,358,238 28,402,214 30,434,584 Basic earnings (loss) per common share attributable to Masonite: Continuing operations attributable to Masonite $ 1.26 $ 0.91 $ 2.01 $ 1.70 Discontinued operations attributable to Masonite, net of tax — (0.01 ) (0.02 ) (0.01 ) Total Basic earnings per common share attributable to Masonite $ 1.26 $ 0.90 $ 1.99 $ 1.69 Diluted earnings (loss) per common share attributable to Masonite: Continuing operations attributable to Masonite $ 1.24 $ 0.89 $ 1.97 $ 1.67 Discontinued operations attributable to Masonite, net of tax — — (0.01 ) (0.01 ) Total Diluted earnings per common share attributable to Masonite $ 1.24 $ 0.89 $ 1.96 $ 1.66 Anti-dilutive instruments excluded from diluted earnings per common share: Stock appreciation rights 51,129 55,955 51,129 55,955 The weighted average number of shares outstanding utilized for the diluted EPS calculation contemplates the exercise of all currently outstanding SARs and the conversion of all RSUs. The dilutive effect of such equity awards is calculated based on the weighted average share price for each fiscal period using the treasury stock method. For all periods presented, common shares issuable for stock appreciation rights which have a higher strike price than our weighted average market price have been excluded from the computation of diluted earnings per share, as their effect would have been anti-dilutive.

Segment Information

Segment Information	6 Months Ended
	Jul. 01, 2018
Segment Reporting [Abstract]
Segment Information	Segment Information Our reportable segments are organized and managed principally by end market: North American Residential, Europe and Architectural. The North American Residential reportable segment is the aggregation of the Wholesale and Retail operating segments. The Europe reportable segment is the aggregation of the United Kingdom and Central Eastern Europe operating segments. The Architectural reportable segment consists solely of the Architectural operating segment. The Corporate & Other category includes unallocated corporate costs and the results of immaterial operating segments which were not aggregated into any reportable segment. Operating segments are aggregated into reportable segments only if they exhibit similar economic characteristics. In addition to similar economic characteristics we also consider the following factors in determining the reportable segments: the nature of business activities, the management structure directly accountable to our chief operating decision maker for operating and administrative activities, availability of discrete financial information and information presented to the Board of Directors and investors. Our management reviews net sales and Adjusted EBITDA (as defined below) to evaluate segment performance and allocate resources. Net assets are not allocated to the reportable segments. Adjusted EBITDA is a non-GAAP financial measure which does not have a standardized meaning under GAAP and is unlikely to be comparable to similar measures used by other companies. Adjusted EBITDA should not be considered as an alternative to either net income or operating cash flows determined in accordance with GAAP. Adjusted EBITDA is defined as net income (loss) attributable to Masonite adjusted to exclude the following items: • depreciation; • amortization; • share based compensation expense; • loss (gain) on disposal of property, plant and equipment; • registration and listing fees; • restructuring costs; • asset impairment; • loss (gain) on disposal of subsidiaries; • interest expense (income), net; • loss on extinguishment of debt; • other expense (income), net; • income tax expense (benefit); • loss (income) from discontinued operations, net of tax; and • net income (loss) attributable to non-controlling interest. This definition of Adjusted EBITDA differs from the definitions of EBITDA contained in the indenture governing the 2023 Notes and the credit agreement governing the ABL Facility. Adjusted EBITDA is used to evaluate and compare the performance of the segments and it is one of the primary measures used to determine employee incentive compensation. Intersegment transfers are negotiated on an arm’s length basis, using market prices. Certain information with respect to segments is as follows for the periods indicated: (In thousands) Three Months Ended July 1, 2018 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 378,936 $ 101,389 $ 86,552 $ 6,317 $ 573,194 Intersegment sales (1,070 ) (643 ) (4,755 ) — (6,468 ) Net sales to external customers $ 377,866 $ 100,746 $ 81,797 $ 6,317 $ 566,726 Adjusted EBITDA $ 58,963 $ 13,642 $ 11,998 $ (6,317 ) $ 78,286 (In thousands) Three Months Ended July 2, 2017 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 368,869 $ 75,626 $ 77,837 $ 4,513 $ 526,845 Intersegment sales (990 ) (1,791 ) (4,323 ) — (7,104 ) Net sales to external customers $ 367,879 $ 73,835 $ 73,514 $ 4,513 $ 519,741 Adjusted EBITDA $ 54,606 $ 9,001 $ 7,495 $ (2,831 ) $ 68,271 (In thousands) Six Months Ended July 1, 2018 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 739,478 $ 189,141 $ 158,116 $ 10,741 $ 1,097,476 Intersegment sales (1,932 ) (1,291 ) (9,648 ) — (12,871 ) Net sales to external customers $ 737,546 $ 187,850 $ 148,468 $ 10,741 $ 1,084,605 Adjusted EBITDA $ 109,361 $ 23,572 $ 19,658 $ (12,891 ) $ 139,700 (In thousands) Six Months Ended July 2, 2017 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 707,998 $ 146,453 $ 153,756 $ 11,854 $ 1,020,061 Intersegment sales (2,077 ) (2,647 ) (8,415 ) — (13,139 ) Net sales to external customers $ 705,921 $ 143,806 $ 145,341 $ 11,854 $ 1,006,922 Adjusted EBITDA $ 99,543 $ 16,739 $ 12,709 $ (8,126 ) $ 120,865 As described in Note 1. Business Overview and Significant Accounting Policies, the adoption of ASU 2017-07 required a reclassification of prior periods' other expense (income), net. This resulted in a consolidated decrease of $0.3 million and $0.5 million to Adjusted EBITDA for the three and six months ended July 2, 2017, compared to the same figure previously presented. On a segment basis, Adjusted EBITDA for the Europe segment was increased by $0.1 million for both the three and six months ended July 2, 2017, while Adjusted EBITDA for the Corporate & Other category was decreased by $0.3 million , and $0.7 million for the three and six months ended July 2, 2017, respectively, compared to the same figures previously-presented. Amounts for the segments do not sum to consolidated amounts due to rounding. A reconciliation of our consolidated Adjusted EBITDA to net income (loss) attributable to Masonite is set forth as follows for the periods indicated: Three Months Ended Six Months Ended (In thousands) July 1, 2018 July 2, 2017 July 1, 2018 July 2, 2017 Adjusted EBITDA $ 78,286 $ 68,271 $ 139,700 $ 120,865 Less (plus): Depreciation 13,700 15,277 27,634 29,301 Amortization 7,325 5,596 13,910 11,566 Share based compensation expense 3,538 3,527 6,603 5,954 Loss (gain) on disposal of property, plant and equipment 1,900 415 2,512 141 Restructuring costs — (700 ) — (407 ) Loss (gain) on disposal of subsidiaries — 212 — 212 Interest expense (income), net 9,074 7,112 17,830 14,136 Other expense (income), net (970 ) (288 ) (1,242 ) (802 ) Income tax expense (benefit) 7,894 8,932 14,595 7,253 Loss (income) from discontinued operations, net of tax 131 134 381 379 Net income (loss) attributable to non-controlling interest 953 1,170 1,910 2,683 Net income (loss) attributable to Masonite $ 34,741 $ 26,884 $ 55,567 $ 50,449

Other Comprehensive Income and

Other Comprehensive Income and Accumulated Other Comprehensive Income	6 Months Ended
	Jul. 01, 2018
Equity [Abstract]
Other Comprehensive Income and Accumulated Other Comprehensive Income	Other Comprehensive Income and Accumulated Other Comprehensive Income A rollforward of the components of accumulated other comprehensive income (loss) is as follows for the periods indicated: Three Months Ended Six Months Ended (In thousands) July 1, 2018 July 2, 2017 July 1, 2018 July 2, 2017 Accumulated foreign currency translation gains (losses), beginning of period $ (83,829 ) $ (122,450 ) $ (89,824 ) $ (127,433 ) Foreign currency translation gain (loss) (31,445 ) 16,539 (25,671 ) 22,269 Income tax benefit (expense) on foreign currency translation gain (loss) (21 ) 59 (43 ) (584 ) Cumulative translation adjustment recognized upon deconsolidation of subsidiary — 212 — 212 Less: foreign currency translation gain (loss) attributable to non-controlling interest (369 ) 277 (612 ) 381 Accumulated foreign currency translation gains (losses), end of period (114,926 ) (105,917 ) (114,926 ) (105,917 ) Accumulated pension and other post-retirement adjustments, beginning of period (20,106 ) (21,375 ) (20,328 ) (21,553 ) Amortization of actuarial net losses 299 292 599 584 Income tax benefit (expense) on amortization of actuarial net losses (79 ) (114 ) (157 ) (228 ) Accumulated pension and other post-retirement adjustments (19,886 ) (21,197 ) (19,886 ) (21,197 ) Accumulated other comprehensive income (loss) $ (134,812 ) $ (127,114 ) $ (134,812 ) $ (127,114 ) Other comprehensive income (loss), net of tax $ (31,246 ) $ 16,988 $ (25,272 ) $ 22,253 Less: other comprehensive income (loss) attributable to non-controlling interest (369 ) 277 (612 ) 381 Other comprehensive income (loss) attributable to Masonite $ (30,877 ) $ 16,711 $ (24,660 ) $ 21,872 Actuarial net losses are reclassified out of accumulated other comprehensive income (loss) into cost of goods sold in the condensed consolidated statements of comprehensive income (loss).

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	6 Months Ended
	Jul. 01, 2018
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information Certain cash and non-cash transactions were as follows for the periods indicated: Six Months Ended (In thousands) July 1, 2018 July 2, 2017 Transactions involving cash: Interest paid $ 17,775 $ 13,901 Interest received 504 135 Income taxes paid 4,380 5,061 Income tax refunds 81 41 Non-cash transactions: Property, plant and equipment additions in accounts payable 2,717 4,203 The following reconciles total cash, cash equivalents and restricted cash as of the dates indicated: July 1, 2018 December 31, 2017 Cash and cash equivalents $ 30,151 $ 176,669 Restricted cash 10,485 11,895 Total cash, cash equivalents and restricted cash $ 40,636 $ 188,564

Variable Interest Entity

Variable Interest Entity	6 Months Ended
	Jul. 01, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entity	Variable Interest Entity As of July 1, 2018 , and December 31, 2017 , we held an interest in one variable interest entity ("VIE"), Magna Foremost Sdn Bhd, which is located in Bintulu, Malaysia. The VIE is integrated into our supply chain and manufactures door facings. We are the primary beneficiary of the VIE via the terms of the existing operating principles with the VIE. As primary beneficiary via the operating principles, we receive a disproportionate amount of earnings on sales to third parties in relation to our voting interest, and as a result, receive a majority of the VIE’s residual returns. Sales to third parties did not have a material impact on our condensed consolidated financial statements. We also have the power to direct activities of the VIE that most significantly impact the entity’s economic performance. As its primary beneficiary, we have consolidated the results of the VIE. Our net cumulative investment in the VIE was comprised of the following as of the dates indicated: (In thousands) July 1, December 31, Current assets $ 7,497 $ 7,213 Property, plant and equipment, net 10,286 11,344 Long-term deferred income taxes 5,335 5,472 Other assets, net 3,251 3,386 Current liabilities (1,899 ) (2,326 ) Other long-term liabilities (1,704 ) (1,699 ) Non-controlling interest (3,093 ) (4,029 ) Net assets of the VIE consolidated by Masonite $ 19,673 $ 19,361 Current assets include $3.3 million and $3.2 million of cash and cash equivalents as of July 1, 2018 , and December 31, 2017 , respectively. Assets recognized as a result of consolidating this VIE do not represent additional assets that could be used to satisfy claims against our general assets. Furthermore, liabilities recognized as a result of consolidating these entities do not represent additional claims on our general assets; rather, they represent claims against the specific assets of the consolidated VIE.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jul. 01, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying amounts of our cash and cash equivalents, restricted cash, accounts receivable, income taxes receivable, accounts payable, accrued expenses and income taxes payable approximate fair value because of the short-term maturity of those instruments. The estimated fair value of the 2023 Notes as of July 1, 2018 , was $640.8 million , compared to a carrying value of $624.3 million , and the estimated fair value of the 2023 Notes as of December 31, 2017 , was $653.6 million , compared to a carrying value of $624.1 million . This estimate is based on market quotes and calculations based on current market rates available to us and is categorized as having Level 2 valuation inputs as established by the FASB’s Fair Value Framework. Market quotes used in these calculations are based on bid prices for our debt instruments and are obtained from and corroborated with multiple independent sources. The market quotes obtained from independent sources are within the range of management’s expectations.

Business Overview and Signifi26

Business Overview and Significant Accounting Policies (Policies)	6 Months Ended
	Jul. 01, 2018
Accounting Policies [Abstract]
New Accounting Pronouncements	Adoption of Recent Accounting Pronouncements In March 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which amended Accounting Standards Codification ("ASC") 715, “Retirement Benefits”. This ASU required disaggregation of the service cost component from the other components of net benefit cost. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations. This standard was effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years; early adoption was permitted and retrospective application was required. We have utilized the practical expedient allowing the use of the prior years' disclosed service cost and other cost as the basis for our retrospective changes in presentation. The adoption of this standard changed the presentation of the other components of net benefit cost in our condensed consolidated statements of comprehensive income (loss), requiring the reclassification of a $0.3 million and $0.5 million benefit related to other components of net benefit cost out of previously-presented selling, general and administration expense and into previously presented other expense (income), net, for the three and six months ended July 2, 2017, respectively. The effect of this reclassification reduced previously-presented operating income by this amount for the same periods. The total benefit which will be reclassified for the years ended December 31, 2017, and January 1, 2017, will be $1.1 million and $0.5 million , respectively. In November 2016, the FASB issued ASU 2016-18, "Restricted Cash Flows", which amended ASC 230 "Statement of Cash Flows". This ASU clarified how entities should present restricted cash and restricted cash equivalents in the statement of cash flows. The new guidance requires entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. As a result, entities no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. This ASU was effective for annual periods beginning after December 15, 2017, and interim periods within those annual periods; early adoption was permitted and retrospective application was required. The adoption of this standard changed the presentation of restricted cash in our condensed consolidated statements of cash flows, which is now being combined with cash and cash equivalents, and had the effect of a $0.3 million decrease to previously-presented cash flow used in investing activities for the six months ended July 2, 2017. In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers," which created ASC 606, "Revenue from Contracts with Customers," and largely superseded the existing guidance of ASC 605, "Revenue Recognition." This standard outlined a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and superseded most current revenue recognition guidance, including industry-specific guidance. The core principle of the revenue model is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued ASU 2015-14, "Revenue from Contracts with Customers - Deferral of the Effective Date," and the guidance would now be effective for annual and interim periods beginning on or after December 15, 2017. We have adopted the guidance of ASC 606 as of January 1, 2018, using the modified retrospective method and have applied the standard to only those contracts which were not completed as of the transition date. The adoption of this standard did not have any material impact on revenues in the three months ended April 1, 2018. Prior period amounts were not adjusted and have continued to be reported in accordance with our historic accounting under Topic 605. While we considered an adjustment to opening retained earnings as prescribed by the modified retrospective method, there was no material adjustment ultimately required. Furthermore, there was no material difference between the prior period amounts as reported under ASC 605 and such amounts as would have been reported under ASC 606. Information about the nature, amount and timing of our revenues from contracts with customers is disclosed in Note 10. Revenues. Our accounting policy for revenue recognition is set forth below. Revenue Recognition Revenue from the sale of products is recognized when control of the promised goods is transferred to our customers based on the agreed-upon shipping terms, in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. Volume rebates, expected returns, discounts and other incentives to customers are considered variable consideration and we estimate these amounts based on the expected amount to be provided to customers and reduce the revenues we recognize accordingly. Sales taxes and value added taxes assessed by governmental entities are excluded from the measurement of consideration expected to be received. Shipping and handling costs incurred after a customer has taken possession of our goods are treated as a fulfillment cost and are not considered a separate performance obligation. Shipping and other transportation costs charged to customers are recorded in both revenues and cost of goods sold in the condensed consolidated statements of comprehensive income (loss). Other Recent Accounting Pronouncements not yet Adopted In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)", which will replace the existing guidance in ASC 840, "Leases." The updated standard aims to increase transparency and comparability among organizations by requiring lessees to recognize lease assets and lease liabilities on the balance sheet and requiring disclosure of key information about leasing arrangements. This ASU is effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods; early adoption is permitted and modified retrospective application is required. We are currently implementing a new lease system in connection with the adoption of ASU 2016-02. We are progressing with implementation and continuing to evaluate the impact on our consolidated financial statements and disclosures. We currently anticipate that the primary impact upon adoption will be a material adjustment to our consolidated balance sheets from the recognition, on a discounted basis, of our expected future payments for our operating leases, resulting in the recognition of right to use assets and lease obligations. Our current minimum undiscounted lease commitments under non-cancelable operating leases are disclosed in Note 9. Commitments and Contingencies.

Acquisitions and Disposition (T

Acquisitions and Disposition (Tables)	6 Months Ended
	Jul. 01, 2018
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	Intangible assets acquired from the 2018 Acquisitions consist of the following: (In thousands) Graham & Maiman Expected Useful Life (Years) DW3 Expected Useful Life (Years) Customer relationships $ 2,400 10.0 $ 49,554 10.0 Trademarks and trade names 350 1.5 11,785 10.0 Patents — 1,420 10.0 Other — 114 3.0 Total intangible assets acquired $ 2,750 $ 62,873
Pro forma information of acquisitions	Three Months Ended July 1, 2018 (In thousands, except per share amounts) Masonite Graham & Maiman Historical Sales to 2018 Acquisitions Pro Forma Net sales $ 566,726 $ 11,288 $ (197 ) $ 577,817 Net income (loss) attributable to Masonite 34,741 (114 ) (22 ) 34,605 Basic earnings (loss) per common share $ 1.26 $ 1.25 Diluted earnings (loss) per common share 1.24 1.23 Three Months Ended July 2, 2017 (In thousands, except per share amounts) Masonite Graham & Maiman DW3 A&F Historical Sales to 2018 and 2017 Acquisitions Pro Forma Net sales $ 519,741 $ 17,604 $ 13,736 $ 3,672 $ (1,177 ) $ 553,576 Net income (loss) attributable to Masonite 26,884 (111 ) 575 371 (73 ) 27,646 Basic earnings (loss) per common share $ 0.90 $ 0.93 Diluted earnings (loss) per common share 0.89 0.91 Six Months Ended July 1, 2018 (In thousands, except per share amounts) Masonite Graham & Maiman DW3 Historical Sales to 2018 Acquisitions Pro Forma Net sales $ 1,084,605 $ 26,887 $ 4,918 $ (651 ) $ 1,115,759 Net income (loss) attributable to Masonite 55,567 89 81 (63 ) 55,674 Basic earnings (loss) per common share $ 1.99 $ 2.00 Diluted earnings (loss) per common share 1.96 1.96 Six Months Ended July 2, 2017 (In thousands, except per share amounts) Masonite Graham & Maiman DW3 A&F Historical Sales to 2018 and 2017 Acquisitions Pro Forma Net sales $ 1,006,922 $ 34,440 $ 26,430 $ 6,812 $ (3,441 ) $ 1,071,163 Net income (loss) attributable to Masonite 50,449 54 442 564 (170 ) 51,339 Basic earnings (loss) per common share $ 1.69 $ 1.72 Diluted earnings (loss) per common share 1.66 1.69
2018 Acquisitions
Business Acquisition [Line Items]
Aggregate consideration paid for acquisitions	The fair value of assets acquired and liabilities assumed in the Graham & Maiman and DW3 acquisitions are as follows: (In thousands) Graham & Maiman DW3 Total 2018 Acquisitions Accounts receivable $ — $ 8,590 $ 8,590 Inventory 6,414 5,059 11,473 Property, plant and equipment 19,557 8,196 27,753 Goodwill 10,696 33,623 44,319 Intangible assets 2,750 62,873 65,623 Accounts payable and accrued expenses (126 ) (10,418 ) (10,544 ) Deferred income taxes — (11,546 ) (11,546 ) Other assets and liabilities, net — (68 ) (68 ) Cash consideration, net of cash acquired $ 39,291 $ 96,309 $ 135,600
Pro forma information of acquisitions	The following schedule represents the amounts of net sales and net income (loss) attributable to Masonite from the 2018 Acquisitions which have been included in the consolidated statements of comprehensive income (loss) for the periods indicated subsequent to the acquisition date. Three Months Ended July 1, 2018 (In thousands) Graham & Maiman DW3 Total 2018 Acquisitions Net sales $ 6,266 $ 18,351 $ 24,617 Net income (loss) attributable to Masonite 302 1,145 1,447 Six Months Ended July 1, 2018 (In thousands) Graham & Maiman DW3 Total 2018 Acquisitions Net sales $ 6,266 $ 29,549 $ 35,815 Net income (loss) attributable to Masonite 302 2,093 2,395

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jul. 01, 2018
Inventory Disclosure [Abstract]
Inventories	The amounts of inventory on hand were as follows as of the dates indicated: (In thousands) July 1, December 31, Raw materials $ 174,919 $ 172,960 Finished goods 77,593 68,851 Provision for obsolete or aged inventory (8,088 ) (7,769 ) Inventories, net $ 244,424 $ 234,042

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	6 Months Ended
	Jul. 01, 2018
Property, Plant and Equipment [Abstract]
Amounts of property, plant, and equipment	The carrying amounts of our property, plant and equipment and accumulated depreciation were as follows as of the dates indicated: (In thousands) July 1, December 31, Land $ 29,037 $ 26,790 Buildings 178,535 176,077 Machinery and equipment 688,407 661,026 Property, plant and equipment, gross 895,979 863,893 Accumulated depreciation (304,981 ) (290,334 ) Property, plant and equipment, net $ 590,998 $ 573,559

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jul. 01, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in carrying amount of goodwill	Changes in the carrying amount of goodwill were as follows as of the dates indicated: (In thousands) North American Residential Europe Architectural Total December 31, 2017 $ 2,867 $ 35,431 $ 100,151 $ 138,449 Goodwill from 2018 acquisitions — 33,623 10,696 44,319 Foreign exchange fluctuations (20 ) (3,461 ) (184 ) (3,665 ) July 1, 2018 $ 2,847 $ 65,593 $ 110,663 $ 179,103
Cost and accumulated amortized values of intangible assets	The cost and accumulated amortization values of our intangible assets were as follows as of the dates indicated: July 1, 2018 (In thousands) Cost Accumulated Amortization Translation Adjustment Net Book Value Definite life intangible assets: Customer relationships $ 212,282 $ (89,735 ) $ (15,892 ) $ 106,655 Patents 33,885 (22,814 ) (938 ) 10,133 Software 34,933 (31,860 ) (201 ) 2,872 Trademarks and tradenames 15,155 (2,895 ) (845 ) 11,415 Other 12,340 (10,399 ) (1,784 ) 157 Total definite life intangible assets 308,595 (157,703 ) (19,660 ) 131,232 Indefinite life intangible assets: Trademarks and tradenames 108,572 — (10,595 ) 97,977 Total intangible assets $ 417,167 $ (157,703 ) $ (30,255 ) $ 229,209 December 31, 2017 (In thousands) Cost Accumulated Amortization Translation Adjustment Net Book Value Definite life intangible assets: Customer relationships $ 160,327 $ (79,628 ) $ (11,338 ) $ 69,361 Patents 31,999 (21,768 ) (686 ) 9,545 Software 33,574 (31,183 ) (190 ) 2,201 Other 15,246 (11,836 ) (1,781 ) 1,629 Total definite life intangible assets 241,146 (144,415 ) (13,995 ) 82,736 Indefinite life intangible assets: Trademarks and tradenames 108,572 — (8,824 ) 99,748 Total intangible assets $ 349,718 $ (144,415 ) $ (22,819 ) $ 182,484
Estimated future amortization of intangible assets with definite lives	The estimated future amortization of intangible assets with definite lives as of July 1, 2018 , is as follows: (In thousands) Fiscal year: 2018 (remaining six months) $ 13,198 2019 24,980 2020 20,218 2021 16,992 2022 13,520

Accrued Expenses (Tables)

Accrued Expenses (Tables)	6 Months Ended
	Jul. 01, 2018
Accrued Expenses [Abstract]
Schedule of Accrued Expenses	The details of our accrued expenses were as follows as of the dates indicated: (In thousands) July 1, December 31, Accrued payroll $ 43,137 $ 38,296 Accrued rebates 32,744 34,488 Accrued interest 10,987 10,688 Other accruals 47,968 43,287 Total accrued expenses $ 134,836 $ 126,759

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jul. 01, 2018
Debt Disclosure [Abstract]
Schedule of long-term debt	(In thousands) July 1, December 31, 5.625% senior unsecured notes due 2023 $ 625,000 $ 625,000 Unamortized premium on 2023 Notes 5,167 5,714 Debt issuance costs for 2023 Notes (5,889 ) (6,635 ) Capital lease obligations 176 378 Other long-term debt 1,125 1,200 Total long-term debt $ 625,579 $ 625,657

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jul. 01, 2018
Commitments and Contingencies Disclosure [Abstract]
Minimum payments under non-cancelable operating leases and service agreements	Minimum payments, for the following future periods, under non-cancelable operating leases and service agreements with initial or remaining terms of one year or more consist of the following: (In thousands) Fiscal year: 2018 (remaining six months) $ 12,615 2019 23,197 2020 21,409 2021 16,672 2022 12,523 Thereafter 55,818 Total future minimum lease payments $ 142,234

Share Based Compensation Plans

Share Based Compensation Plans (Tables)	6 Months Ended
	Jul. 01, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock appreciation rights award activity	Six Months Ended July 1, 2018 Stock Appreciation Rights Aggregate Intrinsic Value (in thousands) Weighted Average Exercise Price Average Remaining Contractual Life (Years) Outstanding, beginning of period 537,930 $ 23,263 $ 32.00 4.5 Granted 69,752 65.00 Exercised (25,725 ) 1,288 19.82 Outstanding, end of period 581,957 $ 20,839 $ 36.49 4.8 Exercisable, end of period 459,072 $ 20,085 $ 28.30 3.6 Six Months Ended July 2, 2017 Stock Appreciation Rights Aggregate Intrinsic Value (in thousands) Weighted Average Exercise Price Average Remaining Contractual Life (Years) Outstanding, beginning of period 790,290 $ 32,659 $ 24.47 4.6 Granted 59,265 77.00 Exercised (191,593 ) 11,453 18.93 Forfeited (10,357 ) 64.32 Outstanding, end of period 647,605 $ 29,365 $ 30.29 4.6 Exercisable, end of period 545,422 $ 28,573 $ 23.11 3.9
Schedule of Share-based Compensation, Stock Appreciation Rights, Valuation Assumptions	The weighted average grant date assumptions used for the SARs granted were as follows for the periods indicated: 2018 Grants 2017 Grants SAR value (model conclusion) $ 18.63 $ 22.65 Risk-free rate 2.7 % 2.0 % Expected dividend yield 0.0 % 0.0 % Expected volatility 22.8 % 25.8 % Expected term (years) 6.0 6.0
Restricted stock units award activity	Six Months Ended July 1, 2018 July 2, 2017 Total Restricted Stock Units Outstanding Weighted Average Grant Date Fair Value Total Restricted Stock Units Outstanding Weighted Average Grant Date Fair Value Outstanding, beginning of period 417,598 $ 66.14 501,926 $ 58.51 Granted 276,647 63.02 227,992 70.62 Delivered (162,529 ) (186,312 ) Withheld to cover (1) (41,557 ) (54,638 ) Forfeited (9,831 ) (31,726 ) Outstanding, end of period 480,328 $ 65.52 457,242 $ 65.68 ____________ (1) A portion of the vested RSUs delivered were net share settled to cover statutory requirements for income and other employment taxes. We remit the equivalent cash to the appropriate taxing authorities. These net share settlements had the effect of share repurchases by us as we reduced and retired the number of shares that would have otherwise been issued as a result of the vesting.

Restructuring Costs (Tables)

Restructuring Costs (Tables)	6 Months Ended
	Jul. 01, 2018
Restructuring and Related Activities [Abstract]
Total restructuring costs by plan	The following table summarizes the restructuring charges recorded for the periods indicated: Three Months Ended July 2, 2017 (In thousands) Europe Architectural Corporate & Other Total 2016 Plan $ — $ 503 $ — $ 503 2015 Plan (96 ) — 24 (72 ) 2014 Plan — — (1,131 ) (1,131 ) Total Restructuring Costs $ (96 ) $ 503 $ (1,107 ) $ (700 ) Six Months Ended July 2, 2017 (In thousands) Europe Architectural Corporate & Other Total 2016 Plan $ — $ 774 $ — $ 774 2015 Plan (96 ) — 46 (50 ) 2014 Plan — — (1,131 ) (1,131 ) Total Restructuring Costs $ (96 ) $ 774 $ (1,085 ) $ (407 ) Cumulative Amount Incurred Through July 1, 2018 (In thousands) North American Residential Europe Architectural Corporate & Other Total 2016 Plan $ — $ — $ 3,707 $ — $ 3,707 2015 Plan — 2,335 — 3,274 5,609 2014 Plan — — — 7,993 7,993 2013 Plan 3,025 2,733 — 2,157 7,915 2012 and Prior Plans 2,378 12,668 — 3,609 18,655 Total Restructuring Costs $ 5,403 $ 17,736 $ 3,707 $ 17,033 $ 43,879
Schedule of restructuring reserve by type of cost	The changes in the accrual for restructuring by activity were as follows for the periods indicated: (In thousands) December 31, Cash Payments July 1, 2016 Plan $ 90 $ 90 $ — 2012 and Prior Plans 194 70 124 Total $ 284 $ 160 $ 124 (In thousands) January 1, Severance Closure Costs Cash Payments July 2, 2016 Plan $ 1,300 $ 271 $ 503 $ 1,173 $ 901 2015 Plan 282 46 (96 ) 86 146 2014 Plan 426 — (1,131 ) (1,119 ) 414 2012 and Prior Plans 465 — — 95 370 Total $ 2,473 $ 317 $ (724 ) $ 235 $ 1,831

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jul. 01, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	(In thousands, except share and per share information) Three Months Ended Six Months Ended July 1, 2018 July 2, 2017 July 1, 2018 July 2, 2017 Net income (loss) attributable to Masonite $ 34,741 $ 26,884 $ 55,567 $ 50,449 Less: income (loss) from discontinued operations, net of tax (131 ) (134 ) (381 ) (379 ) Income (loss) from continuing operations attributable to Masonite $ 34,872 $ 27,018 $ 55,948 $ 50,828 Shares used in computing basic earnings per share 27,609,132 29,789,955 27,899,461 29,825,527 Effect of dilutive securities: Incremental shares issuable under share compensation plans and warrants 420,454 568,283 502,753 609,057 Shares used in computing diluted earnings per share 28,029,586 30,358,238 28,402,214 30,434,584 Basic earnings (loss) per common share attributable to Masonite: Continuing operations attributable to Masonite $ 1.26 $ 0.91 $ 2.01 $ 1.70 Discontinued operations attributable to Masonite, net of tax — (0.01 ) (0.02 ) (0.01 ) Total Basic earnings per common share attributable to Masonite $ 1.26 $ 0.90 $ 1.99 $ 1.69 Diluted earnings (loss) per common share attributable to Masonite: Continuing operations attributable to Masonite $ 1.24 $ 0.89 $ 1.97 $ 1.67 Discontinued operations attributable to Masonite, net of tax — — (0.01 ) (0.01 ) Total Diluted earnings per common share attributable to Masonite $ 1.24 $ 0.89 $ 1.96 $ 1.66 Anti-dilutive instruments excluded from diluted earnings per common share: Stock appreciation rights 51,129 55,955 51,129 55,955

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jul. 01, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Certain information with respect to segments is as follows for the periods indicated: (In thousands) Three Months Ended July 1, 2018 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 378,936 $ 101,389 $ 86,552 $ 6,317 $ 573,194 Intersegment sales (1,070 ) (643 ) (4,755 ) — (6,468 ) Net sales to external customers $ 377,866 $ 100,746 $ 81,797 $ 6,317 $ 566,726 Adjusted EBITDA $ 58,963 $ 13,642 $ 11,998 $ (6,317 ) $ 78,286 (In thousands) Three Months Ended July 2, 2017 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 368,869 $ 75,626 $ 77,837 $ 4,513 $ 526,845 Intersegment sales (990 ) (1,791 ) (4,323 ) — (7,104 ) Net sales to external customers $ 367,879 $ 73,835 $ 73,514 $ 4,513 $ 519,741 Adjusted EBITDA $ 54,606 $ 9,001 $ 7,495 $ (2,831 ) $ 68,271 (In thousands) Six Months Ended July 1, 2018 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 739,478 $ 189,141 $ 158,116 $ 10,741 $ 1,097,476 Intersegment sales (1,932 ) (1,291 ) (9,648 ) — (12,871 ) Net sales to external customers $ 737,546 $ 187,850 $ 148,468 $ 10,741 $ 1,084,605 Adjusted EBITDA $ 109,361 $ 23,572 $ 19,658 $ (12,891 ) $ 139,700 (In thousands) Six Months Ended July 2, 2017 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 707,998 $ 146,453 $ 153,756 $ 11,854 $ 1,020,061 Intersegment sales (2,077 ) (2,647 ) (8,415 ) — (13,139 ) Net sales to external customers $ 705,921 $ 143,806 $ 145,341 $ 11,854 $ 1,006,922 Adjusted EBITDA $ 99,543 $ 16,739 $ 12,709 $ (8,126 ) $ 120,865
Reconciliation of consolidated Adjusted EBITDA to net income (loss) attributable to Masonite	A reconciliation of our consolidated Adjusted EBITDA to net income (loss) attributable to Masonite is set forth as follows for the periods indicated: Three Months Ended Six Months Ended (In thousands) July 1, 2018 July 2, 2017 July 1, 2018 July 2, 2017 Adjusted EBITDA $ 78,286 $ 68,271 $ 139,700 $ 120,865 Less (plus): Depreciation 13,700 15,277 27,634 29,301 Amortization 7,325 5,596 13,910 11,566 Share based compensation expense 3,538 3,527 6,603 5,954 Loss (gain) on disposal of property, plant and equipment 1,900 415 2,512 141 Restructuring costs — (700 ) — (407 ) Loss (gain) on disposal of subsidiaries — 212 — 212 Interest expense (income), net 9,074 7,112 17,830 14,136 Other expense (income), net (970 ) (288 ) (1,242 ) (802 ) Income tax expense (benefit) 7,894 8,932 14,595 7,253 Loss (income) from discontinued operations, net of tax 131 134 381 379 Net income (loss) attributable to non-controlling interest 953 1,170 1,910 2,683 Net income (loss) attributable to Masonite $ 34,741 $ 26,884 $ 55,567 $ 50,449

Other Comprehensive Income an38

Other Comprehensive Income and Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jul. 01, 2018
Equity [Abstract]
Schedule of components of accumulated other comprehensive income (loss)	A rollforward of the components of accumulated other comprehensive income (loss) is as follows for the periods indicated: Three Months Ended Six Months Ended (In thousands) July 1, 2018 July 2, 2017 July 1, 2018 July 2, 2017 Accumulated foreign currency translation gains (losses), beginning of period $ (83,829 ) $ (122,450 ) $ (89,824 ) $ (127,433 ) Foreign currency translation gain (loss) (31,445 ) 16,539 (25,671 ) 22,269 Income tax benefit (expense) on foreign currency translation gain (loss) (21 ) 59 (43 ) (584 ) Cumulative translation adjustment recognized upon deconsolidation of subsidiary — 212 — 212 Less: foreign currency translation gain (loss) attributable to non-controlling interest (369 ) 277 (612 ) 381 Accumulated foreign currency translation gains (losses), end of period (114,926 ) (105,917 ) (114,926 ) (105,917 ) Accumulated pension and other post-retirement adjustments, beginning of period (20,106 ) (21,375 ) (20,328 ) (21,553 ) Amortization of actuarial net losses 299 292 599 584 Income tax benefit (expense) on amortization of actuarial net losses (79 ) (114 ) (157 ) (228 ) Accumulated pension and other post-retirement adjustments (19,886 ) (21,197 ) (19,886 ) (21,197 ) Accumulated other comprehensive income (loss) $ (134,812 ) $ (127,114 ) $ (134,812 ) $ (127,114 ) Other comprehensive income (loss), net of tax $ (31,246 ) $ 16,988 $ (25,272 ) $ 22,253 Less: other comprehensive income (loss) attributable to non-controlling interest (369 ) 277 (612 ) 381 Other comprehensive income (loss) attributable to Masonite $ (30,877 ) $ 16,711 $ (24,660 ) $ 21,872

Supplemental Cash Flow Inform39

Supplemental Cash Flow Information (Tables)	6 Months Ended
	Jul. 01, 2018
Supplemental Cash Flow Elements [Abstract]
Cash and non-cash transactions	Certain cash and non-cash transactions were as follows for the periods indicated: Six Months Ended (In thousands) July 1, 2018 July 2, 2017 Transactions involving cash: Interest paid $ 17,775 $ 13,901 Interest received 504 135 Income taxes paid 4,380 5,061 Income tax refunds 81 41 Non-cash transactions: Property, plant and equipment additions in accounts payable 2,717 4,203
Schedule of Cash, Cash Equivalents and Restricted Cash	The following reconciles total cash, cash equivalents and restricted cash as of the dates indicated: July 1, 2018 December 31, 2017 Cash and cash equivalents $ 30,151 $ 176,669 Restricted cash 10,485 11,895 Total cash, cash equivalents and restricted cash $ 40,636 $ 188,564

Variable Interest Entity (Table

Variable Interest Entity (Tables)	6 Months Ended
	Jul. 01, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidated results of the VIE	Our net cumulative investment in the VIE was comprised of the following as of the dates indicated: (In thousands) July 1, December 31, Current assets $ 7,497 $ 7,213 Property, plant and equipment, net 10,286 11,344 Long-term deferred income taxes 5,335 5,472 Other assets, net 3,251 3,386 Current liabilities (1,899 ) (2,326 ) Other long-term liabilities (1,704 ) (1,699 ) Non-controlling interest (3,093 ) (4,029 ) Net assets of the VIE consolidated by Masonite $ 19,673 $ 19,361

Business Overview and Signifi41

Business Overview and Significant Accounting Policies (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 01, 2018USD ($)Countryfacility	Jul. 02, 2017USD ($)	Jul. 01, 2018USD ($)Countryfacility	Jul. 02, 2017USD ($)	Dec. 31, 2017USD ($)	Jan. 01, 2017USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other expense (income), net	$ (970)	$ (288)	$ (1,242)	$ (802)
Selling, general and administration expenses	$ 71,851	63,870	140,062	128,980
Decrease to previously presented cash flows used in investing activities			$ 169,893	36,647
Number of manufacturing locations | facility	67		67
Number of countries | Country	8		8
Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other expense (income), net		300		500	$ 1,100	$ 500
Selling, general and administration expenses		$ 300		500	$ 1,100	$ 500
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to previously presented cash flows used in investing activities				$ 300

Acquisitions and Disposition (N

Acquisitions and Disposition (Narrative) (Details) - USD ($) $ in Thousands	Jun. 01, 2018	Jan. 29, 2018	Oct. 02, 2017	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Business Acquisition [Line Items]
Cash consideration, net of cash acquired						$ 135,600	$ 0
Cumulative translation adjustment recognized upon deconsolidation of subsidiary				$ 0	$ 212	$ 0	$ 212
Graham & Maiman
Business Acquisition [Line Items]
Cash consideration, net of cash acquired	$ 39,291
Goodwill acquired during period	$ 10,696
DW3
Business Acquisition [Line Items]
Acquired equity interests, percent		100.00%
Cash consideration, net of cash acquired		$ 96,309
Goodwill acquired during period		33,623
Gross contractual value of acquired trade receivables		$ 9,100
A&F
Business Acquisition [Line Items]
Acquired equity interests, percent			100.00%
Cash consideration, net of cash acquired			$ 13,800
Goodwill acquired during period			$ 5,900

Acquisitions and Disposition (A

Acquisitions and Disposition (Aggregate Consideration) (Details) - USD ($) $ in Thousands	Jun. 01, 2018	Jan. 29, 2018	Oct. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Business Acquisition [Line Items]
Cash consideration, net of cash acquired				$ 135,600	$ 0
2018 Acquisitions
Business Acquisition [Line Items]
Accounts receivable				8,590
Inventory				11,473
Property, plant and equipment				27,753
Goodwill				44,319
Intangible assets				65,623
Accounts payable and accrued expenses				(10,544)
Deferred income taxes				(11,546)
Other assets and liabilities, net				(68)
Cash consideration, net of cash acquired				$ 135,600
Graham & Maiman
Business Acquisition [Line Items]
Accounts receivable	$ 0
Inventory	6,414
Property, plant and equipment	19,557
Goodwill	10,696
Intangible assets	2,750
Accounts payable and accrued expenses	(126)
Deferred income taxes	0
Other assets and liabilities, net	0
Cash consideration, net of cash acquired	$ 39,291
DW3
Business Acquisition [Line Items]
Accounts receivable		$ 8,590
Inventory		5,059
Property, plant and equipment		8,196
Goodwill		33,623
Intangible assets		62,873
Accounts payable and accrued expenses		(10,418)
Deferred income taxes		(11,546)
Other assets and liabilities, net		(68)
Cash consideration, net of cash acquired		$ 96,309
A&F
Business Acquisition [Line Items]
Goodwill			$ 5,900
Cash consideration, net of cash acquired			$ 13,800

Acquisitions and Disposition In

Acquisitions and Disposition Intangible assets acquired (Details) - USD ($) $ in Thousands	Jun. 01, 2018	Jan. 29, 2018
Graham & Maiman
Acquired Finite-Lived Intangible Assets [Line Items]
Customer relationships	$ 2,400
Trademarks and trade names	350
Patents	0
Other	0
Total intangible assets acquired	$ 2,750
Graham & Maiman | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period for acquired intangible assets	10 years
Graham & Maiman | Trademarks and trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period for acquired intangible assets	1 year 6 months 3 days
DW3
Acquired Finite-Lived Intangible Assets [Line Items]
Customer relationships		$ 49,554
Trademarks and trade names		11,785
Patents		1,420
Other		114
Total intangible assets acquired		$ 62,873
DW3 | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period for acquired intangible assets		10 years
DW3 | Trademarks and trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period for acquired intangible assets		10 years
DW3 | Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period for acquired intangible assets		10 years
DW3 | Other intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period for acquired intangible assets		3 years

Acquisitions and Disposition (R

Acquisitions and Disposition (Revenues and Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 01, 2018	Jul. 01, 2018
2018 Acquisitions
Business Acquisition [Line Items]
Net sales	$ 24,617	$ 35,815
Net income (loss) attributable to Masonite	1,447	2,395
Graham & Maiman
Business Acquisition [Line Items]
Net sales	6,266	6,266
Net income (loss) attributable to Masonite	302	302
DW3
Business Acquisition [Line Items]
Net sales	18,351	29,549
Net income (loss) attributable to Masonite	$ 1,145	$ 2,093

Acquisitions and Disposition (P

Acquisitions and Disposition (Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Business Acquisition, Pro Forma Information [Line Items]
Net sales	$ 566,726	$ 519,741	$ 1,084,605	$ 1,006,922
Pro forma revenue	577,817	553,576	1,115,759	1,071,163
Net income (loss) attributable to Masonite	34,741	26,884	55,567	50,449
Pro forma net income (loss) attributable Masonite	$ 34,605	$ 27,646	$ 55,674	$ 51,339
Basic earnings per common share attributable to Masonite (in dollars per share)	$ 1.26	$ 0.90	$ 1.99	$ 1.69
Pro forma earnings per share, basic (in dollars per share)	1.25	0.93	2	1.72
Diluted earnings per common share attributable to Masonite (in dollars per share)	1.24	0.89	1.96	1.66
Pro forma earnings per share, diluted (in dollars per share)	$ 1.23	$ 0.91	$ 1.96	$ 1.69
Graham & Maiman
Business Acquisition, Pro Forma Information [Line Items]
Net sales	$ 11,288	$ 17,604	$ 26,887	$ 34,440
Net income (loss) attributable to Masonite	(114)	(111)	89	54
DW3
Business Acquisition, Pro Forma Information [Line Items]
Net sales		13,736	4,918	26,430
Net income (loss) attributable to Masonite		575	81	442
A&F
Business Acquisition, Pro Forma Information [Line Items]
Net sales		3,672		6,812
Net income (loss) attributable to Masonite		371		564
2018 Acquisitions
Business Acquisition, Pro Forma Information [Line Items]
Pro forma elimination of intercompany sales	(197)		(651)
Pro forma elimination of net income resulting from intercompany sales	$ (22)		$ (63)
2018 and 2017 Acquisitions
Business Acquisition, Pro Forma Information [Line Items]
Pro forma elimination of intercompany sales		(1,177)		(3,441)
Pro forma elimination of net income resulting from intercompany sales		$ (73)		$ (170)

Accounts Receivable (Details)

Accounts Receivable (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jul. 01, 2018USD ($)Customer	Dec. 31, 2017USD ($)Customer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts | $	$ 1.6	$ 1.8
Accounts Receivable | Customer Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, customers | Customer	10	10
Concentration risk, percent	52.40%	56.20%

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 174,919	$ 172,960
Finished goods	77,593	68,851
Provision for obsolete or aged inventory	(8,088)	(7,769)
Inventories, net	$ 244,424	$ 234,042

Property, Plant and Equipment49

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 895,979	$ 863,893
Accumulated depreciation	(304,981)	(290,334)
Property, plant and equipment, net	590,998	573,559
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	29,037	26,790
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	178,535	176,077
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 688,407	$ 661,026

Property, Plant and Equipment50

Property, Plant and Equipment (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Property, Plant and Equipment [Abstract]
Depreciation	$ 13,700	$ 15,277	$ 27,634	$ 29,301

Goodwill and Intangible Asset51

Goodwill and Intangible Assets (Schedule of Goodwill) (Details) $ in Thousands	6 Months Ended
	Jul. 01, 2018USD ($)
Goodwill [Roll Forward]
Goodwill, beginning	$ 138,449
Goodwill, ending	179,103
North American Residential
Goodwill [Line Items]
Goodwill acquired during period	0
Goodwill [Roll Forward]
Goodwill, beginning	2,867
Foreign exchange fluctuations	(20)
Goodwill, ending	2,847
Europe
Goodwill [Line Items]
Goodwill acquired during period	33,623
Goodwill [Roll Forward]
Goodwill, beginning	35,431
Foreign exchange fluctuations	(3,461)
Goodwill, ending	65,593
Architectural
Goodwill [Line Items]
Goodwill acquired during period	10,696
Goodwill [Roll Forward]
Goodwill, beginning	100,151
Foreign exchange fluctuations	(184)
Goodwill, ending	110,663
Operating Segments
Goodwill [Line Items]
Goodwill acquired during period	44,319
Goodwill [Roll Forward]
Goodwill, beginning	138,449
Foreign exchange fluctuations	(3,665)
Goodwill, ending	$ 179,103

Goodwill and Intangible Asset52

Goodwill and Intangible Assets (Cost and Accumulated Amortized Values) (Details) - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2017
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 308,595	$ 241,146
Finite-lived intangible assets, accumulated amortization	(157,703)	(144,415)
Finite-lived intangible assets, translation adjustment	(19,660)	(13,995)
Finite-lived intangible assets, net	131,232	82,736
Total intangible assets, gross	417,167	349,718
Total intangible assets, translation adjustment	(30,255)	(22,819)
Total intangible assets, net	229,209	182,484
Customer Relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	212,282	160,327
Finite-lived intangible assets, accumulated amortization	(89,735)	(79,628)
Finite-lived intangible assets, translation adjustment	(15,892)	(11,338)
Finite-lived intangible assets, net	106,655	69,361
Patents
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	33,885	31,999
Finite-lived intangible assets, accumulated amortization	(22,814)	(21,768)
Finite-lived intangible assets, translation adjustment	(938)	(686)
Finite-lived intangible assets, net	10,133	9,545
Software
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	34,933	33,574
Finite-lived intangible assets, accumulated amortization	(31,860)	(31,183)
Finite-lived intangible assets, translation adjustment	(201)	(190)
Finite-lived intangible assets, net	2,872	2,201
Trademarks and trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	15,155
Finite-lived intangible assets, accumulated amortization	(2,895)
Finite-lived intangible assets, translation adjustment	(845)
Finite-lived intangible assets, net	11,415
Other
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	12,340	15,246
Finite-lived intangible assets, accumulated amortization	(10,399)	(11,836)
Finite-lived intangible assets, translation adjustment	(1,784)	(1,781)
Finite-lived intangible assets, net	157	1,629
Trademarks and trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, accumulated amortization	0	0
Indefinite-lived intangible assets, gross	108,572	108,572
Indefinite-lived intangible assets, net	97,977	99,748
Total intangible assets, translation adjustment	$ (10,595)	$ (8,824)

Goodwill and Intangible Asset53

Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 7.2	$ 6	$ 13.3	$ 11.9

Goodwill and Intangible Asset54

Goodwill and Intangible Assets (Estimated Future Amortization of Intangible Assets) (Details) $ in Thousands	Jul. 01, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2018 (remaining six months)	$ 13,198
2,019	24,980
2,020	20,218
2,021	16,992
2,022	$ 13,520

Accrued Expenses (Details)

Accrued Expenses (Details) - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2017
Accrued Expenses [Abstract]
Accrued payroll	$ 43,137	$ 38,296
Accrued rebates	32,744	34,488
Accrued interest	10,987	10,688
Other accruals	47,968	43,287
Total accrued expenses	$ 134,836	$ 126,759

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($)	Jul. 01, 2018	Dec. 31, 2017	Sep. 27, 2017	Mar. 23, 2015
Debt Instrument [Line Items]
Capital lease obligations	$ 176,000	$ 378,000
Other long-term debt	1,125,000	1,200,000
Total long-term debt	625,579,000	625,657,000
Senior Notes | Senior Notes Due 2023
Debt Instrument [Line Items]
Long-term debt	625,000,000	625,000,000
Unamortized premium on 2023 Notes	5,167,000	5,714,000	$ 6,000,000
Debt issuance costs for 2023 Notes	(5,889,000)	(6,635,000)	$ (2,100,000)	$ (7,100,000)
Revolving Credit Facility | ABL Facility 2020
Debt Instrument [Line Items]
Revolving credit facilities	$ 0	$ 0

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details)	Mar. 23, 2015USD ($)	Jul. 01, 2018USD ($)	Jul. 02, 2017USD ($)	Jul. 01, 2018USD ($)	Jul. 02, 2017USD ($)	Dec. 31, 2017USD ($)	Jan. 03, 2016USD ($)	Sep. 27, 2017USD ($)	Apr. 09, 2015USD ($)
Debt Instrument [Line Items]
Debt issued, percent above par (percent)	100.00%
Proceeds from issuance of long-term debt				$ 0	$ 746,000
Senior Notes | Senior Notes Due 2023
Debt Instrument [Line Items]
Interest expense		$ 8,900,000	$ 6,900,000	$ 17,600,000	$ 13,900,000
Aggregate principal	$ 475,000,000							$ 150,000,000
Interest rate stated percentage		5.625%		5.625%
Debt issued, percent above par (percent)								104.00%
Unamortized premium on 2023 Notes		$ 5,167,000		$ 5,167,000		$ 5,714,000		$ 6,000,000
Proceeds from issuance of long-term debt						153,900,000	$ 467,900,000
Debt issuance costs	$ (7,100,000)	(5,889,000)		$ (5,889,000)		(6,635,000)		$ (2,100,000)
Senior Notes | Senior Notes Due 2023 | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Redemption price, percentage				101.00%
Senior Notes | Senior Notes Due 2021
Debt Instrument [Line Items]
Interest rate stated percentage	8.25%
Extinguishment of debt	$ 500,000,000
Revolving Credit Facility | ABL Facility 2020
Debt Instrument [Line Items]
Maximum borrowing capacity									$ 150,000,000
Maximum pro forma secured leverage ratio				4.5
Revolving credit facilities		$ 0		$ 0		$ 0
Minimum | Revolving Credit Facility | ABL Facility 2020
Debt Instrument [Line Items]
Unutilized commitment fee percentage				0.25%
Minimum | Revolving Credit Facility | ABL Facility 2020 | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate				0.25%
Minimum | Revolving Credit Facility | ABL Facility 2020 | Eurodollar Rate
Debt Instrument [Line Items]
Basis spread on variable rate				1.25%
Maximum | Revolving Credit Facility | ABL Facility 2020 | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate				0.75%
Maximum | Revolving Credit Facility | ABL Facility 2020 | Eurodollar Rate
Debt Instrument [Line Items]
Basis spread on variable rate				1.75%

Commitments and Contingencies58

Commitments and Contingencies (Details) $ in Thousands	Jul. 01, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2018 (remaining six months)	$ 12,615
2,019	23,197
2,020	21,409
2,021	16,672
2,022	12,523
Thereafter	55,818
Total future minimum lease payments	$ 142,234

Commitments and Contingencies59

Commitments and Contingencies (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2018USD ($)	Jul. 02, 2017USD ($)	Jul. 01, 2018USD ($)Lease_Option	Jul. 02, 2017USD ($)
Operating Leased Assets [Line Items]
Lease renewal term			5 years
Rent expense | $	$ 7.8	$ 7.2	$ 15.5	$ 14.3
Minimum
Operating Leased Assets [Line Items]
Lease renewal options			0
Maximum
Operating Leased Assets [Line Items]
Lease renewal options			3

Share Based Compensation Plan60

Share Based Compensation Plans Narrative (Details) - USD ($) $ in Thousands	Jul. 12, 2012	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017	Jun. 09, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation		$ 3,538	$ 3,527	$ 6,603	$ 5,954
Share based compensation unrecognized		20,100		$ 20,100
Weighted average remaining requisite service period				1 year 10 months 29 days
Deferred compensation liability		6,200		$ 6,200
Deferred compensation asset		$ 6,200		$ 6,200
2009 Plan | Management | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage ownership of common equity						9.55%
Equity awards not to exceed						3,554,811
2009 Plan | Director | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage ownership of common equity						0.90%
Equity awards not to exceed						335,004
2012 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Plan term	10 years
2012 Plan | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards not to exceed	2,000,000
Common stock available for future issuance		735,644		735,644
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Plan term				10 years
Award vesting period				3 years
Vested, fair value				$ 700	$ 400
Average requisite service period				2 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				3 years
Average requisite service period				2 years 7 months 9 days	2 years 8 months 16 days
Units vested				204,086
Fair value of shares vested				$ 13,100
Service Requirement | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				44.00%
Service and Performance Requirements | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				56.00%

Share Based Compensation Plan61

Share Based Compensation Plans (SARs) (Details) - Stock Appreciation Rights (SARs) - USD ($) $ / shares in Units, $ in Thousands	Jul. 01, 2018	Dec. 31, 2017	Jul. 02, 2017	Jan. 01, 2017	Jul. 01, 2018	Jul. 02, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning of period, shares					537,930	790,290
Granted, shares					69,752	59,265
Exercised, shares					(25,725)	(191,593)
Forfeited, shares						(10,357)
Outstanding, end of period, shares	581,957	537,930	647,605	790,290	581,957	647,605
Exercisable, shares	459,072		545,422		459,072	545,422
Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value & Average Remaining Contractual Life [Abstract]
Outstanding, beginning of period, aggregate intrinsic value					$ 23,263	$ 32,659
Exercised, aggregate intrinsic value					1,288	11,453
Outstanding, end period, aggregate intrinsic value	$ 20,839	$ 23,263	$ 29,365	$ 32,659	20,839	29,365
Exercisable, aggregate intrinsic value	$ 20,085		$ 28,573		$ 20,085	$ 28,573
Outstanding, beginning of period, weighted average remaining contractual term	4 years 9 months 22 days	4 years 6 months 3 days	4 years 7 months 9 days	4 years 7 months 9 days
Outstanding, end of period, weighted average remaining contractual term	4 years 9 months 22 days	4 years 6 months 3 days	4 years 7 months 9 days	4 years 7 months 9 days
Exercisable, weighted average remaining contractual term	3 years 7 months 9 days		3 years 10 months 29 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, beginning of period, weighted average exercise price					$ 32	$ 24.47
Granted, weighted average exercise price					65	77
Exercised, weighted average exercise price					19.82	18.93
Forfeited, weighted average exercise price						64.32
Outstanding, end of period, weighted average exercise price	$ 36.49	$ 32	$ 30.29	$ 24.47	36.49	30.29
Exercisable, weighted average exercise price	$ 28.30		$ 23.11		$ 28.30	$ 23.11

Share Based Compensation Plan62

Share Based Compensation Plans (Weighted Average Grant Date Assumptions) (Details) - Stock Appreciation Rights (SARs) - $ / shares	6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option value (model conclusion)	$ 18.63	$ 22.65
Risk-free rate	2.70%	2.00%
Expected dividend yield	0.00%	0.00%
Expected volatility	22.80%	25.80%
Expected term (in years)	6 years	6 years

Share Based Compensation Plan63

Share Based Compensation Plans (RSUs) (Details) - Restricted Stock Units (RSUs) - $ / shares		6 Months Ended
		Jul. 01, 2018	Jul. 02, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, beginning of period (shares)		417,598	501,926
Granted (shares)		276,647	227,992
Delivered (shares)		(162,529)	(186,312)
Withheld to cover (shares)	[1]	(41,557)	(54,638)
Forfeited (shares)		(9,831)	(31,726)
Outstanding, end of period (shares)		480,328	457,242
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning of period (weighted average grant date fair value)		$ 66.14	$ 58.51
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		63.02	70.62
Outstanding, end of period (weighted average grant date fair value)		$ 65.52	$ 65.68
[1]	A portion of the vested RSUs delivered were net share settled to cover statutory requirements for income and other employment taxes. We remit the equivalent cash to the appropriate taxing authorities. These net share settlements had the effect of share repurchases by us as we reduced and retired the number of shares that would have otherwise been issued as a result of the vesting.

Restructuring Costs (Restructur

Restructuring Costs (Restructuring Costs by Plan) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net	$ 0	$ (700)	$ 0	$ (407)
Cumulative amount incurred to date	43,879		43,879
2016 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		503		774
Cumulative amount incurred to date	3,707		3,707
2015 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		(72)		(50)
Cumulative amount incurred to date	5,609		5,609
2014 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		(1,131)		(1,131)
Cumulative amount incurred to date	7,993		7,993
2013 Plan
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	7,915		7,915
2012 and Prior Plans
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	18,655		18,655
Operating Segments | North American Residential
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	5,403		5,403
Operating Segments | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		(96)		(96)
Cumulative amount incurred to date	17,736		17,736
Operating Segments | Architectural
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		503		774
Cumulative amount incurred to date	3,707		3,707
Operating Segments | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		(1,107)		(1,085)
Cumulative amount incurred to date	17,033		17,033
Operating Segments | 2016 Plan | North American Residential
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0		0
Operating Segments | 2016 Plan | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		0		0
Cumulative amount incurred to date	0		0
Operating Segments | 2016 Plan | Architectural
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		503		774
Cumulative amount incurred to date	3,707		3,707
Operating Segments | 2016 Plan | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		0		0
Cumulative amount incurred to date	0		0
Operating Segments | 2015 Plan | North American Residential
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0		0
Operating Segments | 2015 Plan | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		(96)		(96)
Cumulative amount incurred to date	2,335		2,335
Operating Segments | 2015 Plan | Architectural
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		0		0
Cumulative amount incurred to date	0		0
Operating Segments | 2015 Plan | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		24		46
Cumulative amount incurred to date	3,274		3,274
Operating Segments | 2014 Plan | North American Residential
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0		0
Operating Segments | 2014 Plan | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		0		0
Cumulative amount incurred to date	0		0
Operating Segments | 2014 Plan | Architectural
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		0		0
Cumulative amount incurred to date	0		0
Operating Segments | 2014 Plan | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net		$ (1,131)		$ (1,131)
Cumulative amount incurred to date	7,993		7,993
Operating Segments | 2013 Plan | North American Residential
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	3,025		3,025
Operating Segments | 2013 Plan | Europe
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	2,733		2,733
Operating Segments | 2013 Plan | Architectural
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0		0
Operating Segments | 2013 Plan | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	2,157		2,157
Operating Segments | 2012 and Prior Plans | North American Residential
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	2,378		2,378
Operating Segments | 2012 and Prior Plans | Europe
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	12,668		12,668
Operating Segments | 2012 and Prior Plans | Architectural
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0		0
Operating Segments | 2012 and Prior Plans | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	$ 3,609		$ 3,609

Restructuring Costs (Details)

Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			$ 284	$ 2,473
Restructuring charges	$ 0	$ (700)	0	(407)
Cash payments			160	235
Restructuring reserve, ending balance	124	1,831	124	1,831
Severance
Restructuring Reserve [Roll Forward]
Restructuring charges				317
Facility Closing
Restructuring Reserve [Roll Forward]
Restructuring charges				(724)
2016 Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			90
Restructuring charges		503		774
Cash payments			90
Restructuring reserve, ending balance	0		0
2015 Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				1,300
Restructuring charges		(72)		(50)
Cash payments				1,173
Restructuring reserve, ending balance		901		901
2015 Plan | Severance
Restructuring Reserve [Roll Forward]
Restructuring charges				271
2015 Plan | Facility Closing
Restructuring Reserve [Roll Forward]
Restructuring charges				503
2014 Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				282
Restructuring charges		(1,131)		(1,131)
Cash payments				86
Restructuring reserve, ending balance		146		146
2014 Plan | Severance
Restructuring Reserve [Roll Forward]
Restructuring charges				46
2014 Plan | Facility Closing
Restructuring Reserve [Roll Forward]
Restructuring charges				(96)
2013 Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance				426
Cash payments				(1,119)
Restructuring reserve, ending balance		414		414
2013 Plan | Severance
Restructuring Reserve [Roll Forward]
Restructuring charges				0
2013 Plan | Facility Closing
Restructuring Reserve [Roll Forward]
Restructuring charges				(1,131)
2012 and Prior Plans
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			194	465
Cash payments			70	95
Restructuring reserve, ending balance	$ 124	$ 370	$ 124	370
2012 and Prior Plans | Severance
Restructuring Reserve [Roll Forward]
Restructuring charges				0
2012 and Prior Plans | Facility Closing
Restructuring Reserve [Roll Forward]
Restructuring charges				$ 0

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Income Tax Disclosure [Abstract]
Canadian federal statutory rate			26.50%
Income tax benefit due to the exercise and delivery of share-based awards	$ 0.1	$ 0.1	$ 0.3	$ 5.1

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Earnings Per Share [Abstract]
Net income (loss) attributable to Masonite	$ 34,741	$ 26,884	$ 55,567	$ 50,449
Less: income (loss) from discontinued operations, net of tax	(131)	(134)	(381)	(379)
Income (loss) from continuing operations attributable to Masonite	$ 34,872	$ 27,018	$ 55,948	$ 50,828
Shares used in computing basic earnings per share	27,609,132	29,789,955	27,899,461	29,825,527
Effect of dilutive securities:
Incremental shares issuable under share compensation plans and warrants	420,454	568,283	502,753	609,057
Shares used in computing diluted earnings per share	28,029,586	30,358,238	28,402,214	30,434,584
Basic earnings (loss) per common share attributable to Masonite:
Continuing operations attributable to Masonite	$ 1.26	$ 0.91	$ 2.01	$ 1.70
Discontinued operations attributable to Masonite, net of tax	0	(0.01)	(0.02)	(0.01)
Total Basic earnings per common share attributable to Masonite	1.26	0.90	1.99	1.69
Continuing operations attributable to Masonite	1.24	0.89	1.97	1.67
Discontinued operations attributable to Masonite, net of tax	0	0	(0.01)	(0.01)
Total Diluted earnings per common share attributable to Masonite	$ 1.24	$ 0.89	$ 1.96	$ 1.66
Anti-dilutive instruments excluded from diluted earnings per common share	51,129	55,955	51,129	55,955

Segment Information (Geographic

Segment Information (Geographic Segments Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 566,726	$ 519,741	$ 1,084,605	$ 1,006,922
Adjusted EBITDA	78,286	68,271	139,700	120,865
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	573,194	526,845	1,097,476	1,020,061
Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	(6,468)	(7,104)	(12,871)	(13,139)
North American Residential
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	377,866	367,879	737,546	705,921
Adjusted EBITDA	58,963	54,606	109,361	99,543
North American Residential | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	378,936	368,869	739,478	707,998
North American Residential | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	(1,070)	(990)	(1,932)	(2,077)
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	100,746	73,835	187,850	143,806
Adjusted EBITDA	13,642	9,001	23,572	16,739
Europe | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	101,389	75,626	189,141	146,453
Europe | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	(643)	(1,791)	(1,291)	(2,647)
Architectural
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	81,797	73,514	148,468	145,341
Adjusted EBITDA	11,998	7,495	19,658	12,709
Architectural | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	86,552	77,837	158,116	153,756
Architectural | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	(4,755)	(4,323)	(9,648)	(8,415)
Corporate & Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6,317	4,513	10,741	11,854
Adjusted EBITDA	(6,317)	(2,831)	(12,891)	(8,126)
Corporate & Other | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6,317	4,513	10,741	11,854
Corporate & Other | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0

Segment Information (Reconcilia

Segment Information (Reconciliation of Consolidated Adjusted EBITDA to Net Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Segment Reporting [Abstract]
Adjusted EBITDA	$ 78,286	$ 68,271	$ 139,700	$ 120,865
Depreciation	13,700	15,277	27,634	29,301
Amortization	7,325	5,596	13,910	11,566
Share based compensation expense	3,538	3,527	6,603	5,954
Loss (gain) on disposal of property, plant and equipment	1,900	415	2,512	141
Restructuring costs, net	0	(700)	0	(407)
Loss (gain) on disposal of subsidiaries	0	212	0	212
Interest expense (income), net	9,074	7,112	17,830	14,136
Other expense (income), net	(970)	(288)	(1,242)	(802)
Income tax expense (benefit)	7,894	8,932	14,595	7,253
Loss (income) from discontinued operations, net of tax	131	134	381	379
Net income (loss) attributable to non-controlling interest	953	1,170	1,910	2,683
Net income (loss) attributable to Masonite	$ 34,741	$ 26,884	$ 55,567	$ 50,449

Segment Information (Additional

Segment Information (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Adjusted EBITDA	$ 78,286	$ 68,271	$ 139,700	$ 120,865
Accounting Standards Update 2017-07
Revenues from External Customers and Long-Lived Assets [Line Items]
Adjusted EBITDA		(300)		(500)
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Adjusted EBITDA	13,642	9,001	23,572	16,739
Europe | Accounting Standards Update 2017-07
Revenues from External Customers and Long-Lived Assets [Line Items]
Adjusted EBITDA				(100)
Corporate & Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Adjusted EBITDA	$ (6,317)	(2,831)	$ (12,891)	(8,126)
Corporate & Other | Accounting Standards Update 2017-07
Revenues from External Customers and Long-Lived Assets [Line Items]
Adjusted EBITDA		$ (300)		$ (700)

Other Comprehensive Income an71

Other Comprehensive Income and Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017	Dec. 31, 2017
Accumulated Foreign Currency Translation Gains (Losses) [Roll Forward]
Accumulated foreign currency translation gains (losses), beginning of period	$ (83,829)	$ (122,450)	$ (89,824)	$ (127,433)	$ (127,433)
Foreign currency translation gain (loss)	(31,445)	16,539	(25,671)	22,269
Income tax benefit (expense) on foreign currency translation gain (loss)	(21)	59	(43)	(584)
Cumulative translation adjustment recognized upon deconsolidation of subsidiary	0	(212)	0	(212)
Less: foreign currency translation gain (loss) attributable to non-controlling interest	(369)	277	(612)	381
Accumulated foreign currency translation gains (losses), end of period	(114,926)	(105,917)	(114,926)	(105,917)	(89,824)
Accumulated Amortization of Actuarial Net Losses [Roll Forward]
Accumulated pension and other post-retirement adjustments, beginning of period	(20,106)	(21,375)	(20,328)	(21,553)	(21,553)
Amortization of actuarial net losses	299	292	599	584
Income tax benefit (expense) on amortization of actuarial net losses	(79)	(114)	(157)	(228)
Accumulated pension and other post-retirement adjustments	(19,886)	(21,197)	(19,886)	(21,197)	(20,328)
Accumulated other comprehensive income (loss)	(134,812)	(127,114)	(134,812)	(127,114)	(110,152)
Other comprehensive income (loss), net of tax	(31,246)	16,988	(25,272)	22,253	$ 39,586
Less: other comprehensive income (loss) attributable to non-controlling interest	(369)	277	(612)	381
Other comprehensive income (loss) attributable to Masonite	$ (30,877)	$ 16,711	$ (24,660)	$ 21,872

Supplemental Cash Flow Inform72

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017
Transactions involving cash:
Interest paid	$ 17,775	$ 13,901
Interest received	504	135
Income taxes paid	4,380	5,061
Income tax refunds	81	41
Non-cash transactions:
Property, plant and equipment additions in accounts payable	$ 2,717	$ 4,203

Supplemental Cash Flow Inform73

Supplemental Cash Flow Information Cash, cash equivalents and restricted cash (Details) - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2017	Jul. 02, 2017	Jan. 01, 2017
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 30,151	$ 176,669
Restricted cash	10,485	11,895
Total cash, cash equivalents and restricted cash	$ 40,636	$ 188,564	$ 53,542	$ 83,910

Variable Interest Entity (Detai

Variable Interest Entity (Details) - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Current assets	$ 627,961	$ 721,870
Property, plant and equipment, net	590,998	573,559
Long-term deferred income taxes	27,184	29,899
Other assets, net	28,403	22,687
Current liabilities	(249,852)	(222,125)
Other long-term liabilities	(32,986)	(35,754)
Net assets of the VIE consolidated by Masonite	(697,467)	(722,629)
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Current assets	7,497	7,213
Property, plant and equipment, net	10,286	11,344
Long-term deferred income taxes	5,335	5,472
Other assets, net	3,251	3,386
Current liabilities	(1,899)	(2,326)
Other long-term liabilities	(1,704)	(1,699)
Non-controlling interest	(3,093)	(4,029)
Net assets of the VIE consolidated by Masonite	$ 19,673	$ 19,361

Variable Interest Entity (Narra

Variable Interest Entity (Narrative) (Details) $ in Thousands	Jul. 01, 2018USD ($)	Dec. 31, 2017USD ($)
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 30,151	$ 176,669
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Number of variable interest entities	1	1
Cash and cash equivalents	$ 3,300	$ 3,200

Fair Value of Financial Instr76

Fair Value of Financial Instruments (Details) - Senior Notes - Fair Value, Inputs, Level 2 - USD ($) $ in Millions	Jul. 01, 2018	Dec. 31, 2017
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of senior notes	$ 640.8	$ 653.6
Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of senior notes	$ 624.3	$ 624.1