Masonite International (DOOR) 10-Q 2 May 19 2019 Q1 Quarterly report Financial data

Document

Document - shares	3 Months Ended
	Mar. 31, 2019	Apr. 29, 2019
Entity [Abstract]
Entity Registrant Name	Masonite International Corporation
Entity Central Index Key	0000893691
Current Fiscal Year End Date	--12-29
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		25,146,479

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Statement of Comprehensive Income [Abstract]
Net sales	$ 530,311	$ 517,879
Cost of goods sold	418,207	412,450
Gross profit	112,104	105,429
Selling, general and administration expenses	78,100	68,211
Restructuring costs	3,740	0
Asset impairment	10,625	0
Loss on disposal of subsidiaries	(4,605)	0
Operating income	15,034	37,218
Interest expense, net	11,127	8,756
Other income, net of expense	(1,130)	(22)
Income before income tax expense	5,037	28,484
Income tax expense	58	6,701
Net income	4,979	21,783
Less: net income attributable to non-controlling interests	1,190	957
Net income attributable to Masonite	$ 3,789	$ 20,826
Basic earnings per common share attributable to Masonite (in dollars per share)	$ 0.15	$ 0.74
Diluted earnings per common share attributable to Masonite (in dollars per share)	$ 0.15	$ 0.73
Other comprehensive income:
Net income	$ 4,979	$ 21,783
Foreign currency translation gain	13,991	5,774
Amortization of actuarial net losses	404	300
Income tax expense related to other comprehensive income	(93)	(100)
Other comprehensive income, net of tax	14,302	5,974
Comprehensive income	19,281	27,757
Less: comprehensive income attributable to non-controlling interests	1,406	714
Comprehensive income attributable to Masonite	$ 17,875	$ 27,043

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018
Current assets:
Cash and cash equivalents	$ 79,642	$ 115,656
Restricted cash	10,985	10,485
Accounts receivable, net	291,298	283,580
Inventories, net	255,499	250,407
Prepaid expenses	31,432	32,970
Income taxes receivable	3,181	3,495
Total current assets	672,037	696,593
Property, plant and equipment, net	598,064	609,753
Operating lease right-of-use assets	126,600	0
Investment in equity investees	14,372	13,474
Goodwill	182,898	180,297
Intangible assets, net	208,947	212,045
Deferred income taxes	29,451	28,509
Other assets	39,347	37,794
Total assets	1,871,716	1,778,465
Current liabilities:
Accounts payable	95,523	96,362
Accrued expenses	147,922	147,345
Income taxes payable	2,643	1,599
Total current liabilities	246,088	245,306
Long-term debt	796,586	796,398
Deferred income taxes	79,302	82,122
Long-term operating lease liabilities	114,426	0
Other liabilities	24,944	32,334
Total liabilities	1,261,346	1,156,160
Commitments and Contingencies (Note 10)
Equity:
Share capital: unlimited shares authorized, no par value, 25,314,850 and 25,835,664 shares issued and outstanding as of March 31, 2019, and December 30, 2018, respectively	567,490	575,207
Additional paid-in capital	214,294	218,988
Accumulated deficit	(45,852)	(30,836)
Accumulated other comprehensive loss	(138,833)	(152,919)
Total equity attributable to Masonite	597,099	610,440
Equity attributable to non-controlling interests	13,271	11,865
Total equity	610,370	622,305
Total liabilities and equity	$ 1,871,716	$ 1,778,465

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - shares	Mar. 31, 2019	Dec. 30, 2018
Statement of Financial Position [Abstract]
Shares issued	25,314,850	25,835,664
Shares outstanding	25,314,850	25,835,664

Condensed Consolidated Statem_2

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)	Equity Attributable to Noncontrolling Interests
Opening Balance, Value at Dec. 31, 2017	$ 735,902	$ 624,403	$ 226,528	$ (18,150)	$ (110,152)	$ 13,273
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued for delivery of share based awards, Value		9,864	(9,864)
Common shares issued under employee stock purchase plan, value		516	(79)
Common shares repurchased and retired, Value		(15,229)		(28,962)
Share based compensation expense			3,065
Common shares withheld to cover income taxes payable due to delivery of share based awards			(2,422)
Net income (loss)	21,783			20,826		957
Other comprehensive income (loss), net of tax	5,974				6,217	(243)
Dividends to non-controlling interests						(975)
Ending Balance, Value at Apr. 01, 2018	719,573	$ 619,554	217,228	(26,286)	(103,935)	13,012
Opening Balance, Shares at Dec. 31, 2017		28,369,877
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued for delivery of share based awards, Shares		166,248
Common shares issued under employee stock purchase plan		7,386
Common shares repurchased and retired, Shares		(691,783)
Ending Balance, Shares at Apr. 01, 2018		27,851,728
Opening Balance, Value at Dec. 30, 2018	622,305	$ 575,207	218,988	(30,836)	(152,919)	11,865
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued for delivery of share based awards, Value		6,152	(6,152)
Common shares issued under employee stock purchase plan, value		517	(132)
Common shares repurchased and retired, Value		(14,386)		(18,805)
Share based compensation expense			2,680
Common shares withheld to cover income taxes payable due to delivery of share based awards			(1,090)
Net income (loss)	4,979			3,789		1,190
Other comprehensive income (loss), net of tax	14,302				14,086	216
Dividends to non-controlling interests						0
Ending Balance, Value at Mar. 31, 2019	$ 610,370	$ 567,490	$ 214,294	$ (45,852)	$ (138,833)	$ 13,271
Opening Balance, Shares at Dec. 30, 2018	25,835,664	25,835,664
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued for delivery of share based awards, Shares		116,252
Common shares issued under employee stock purchase plan		9,036
Common shares repurchased and retired, Shares		(646,102)
Ending Balance, Shares at Mar. 31, 2019	25,314,850	25,314,850

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Cash flows from operating activities:
Net income	$ 4,979	$ 21,783
Adjustments to reconcile net income to net cash flow provided by operating activities:
Loss on disposal of subsidiaries	4,605	0
Depreciation	18,285	13,934
Amortization	7,597	6,585
Share based compensation expense	2,680	3,065
Deferred income taxes	(3,708)	3,619
Unrealized foreign exchange loss	272	692
Share of income from equity investees, net of tax	(898)	(311)
Pension and post-retirement funding, net of expense	(1,661)	(1,424)
Non-cash accruals and interest	(562)	382
Loss on sale of property, plant and equipment	2,913	612
Asset impairment	10,625	0
Accounts receivable	(6,587)	(16,629)
Inventories	(5,902)	(1,644)
Prepaid expenses	1,986	(176)
Accounts payable and accrued expenses	(16,193)	(1,969)
Other assets and liabilities	80	(1,326)
Net cash flow provided by operating activities	18,511	27,193
Cash flows from investing activities:
Additions to property, plant and equipment	(20,422)	(21,801)
Cash used in acquisitions, net of cash acquired	(219)	(96,309)
Cash disposed in sale of subsidiaries, net of cash proceeds	(230)	0
Proceeds from sale of property, plant and equipment	88	0
Other investing activities	(418)	(862)
Net cash flow used in investing activities	(21,201)	(118,972)
Cash flows from financing activities:
Repayments of long-term debt	(6)	(102)
Tax witholding on share based awards	(1,090)	(2,422)
Distributions to non-controlling interests	0	(975)
Repurchases of common shares	(33,191)	(44,191)
Net cash flow provided by (used in) financing activities	(34,287)	(47,690)
Net foreign currency translation adjustment on cash	1,463	(224)
Increase (decrease) in cash, cash equivalents and restricted cash	(35,514)	(139,693)
Cash, cash equivalents and restricted cash, beginning of period	126,141	188,564
Cash, cash equivalents and restricted cash, at end of period	$ 90,627	$ 48,871

Business Overview and Significa

Business Overview and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2019
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 30, 2018 , 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-week periods are referred to as three-month periods. Certain prior year amounts have been reclassified to conform to the current basis of presentation, related to discontinued operations, as described in the 2018 Form 10-K. 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 2018 audited consolidated financial statements, other than as noted below. Adoption of Recent Accounting Pronouncements In August 2018, the FASB issued ASU 2018-15, "Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." This ASU amended the definition of a hosting arrangement and required a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in ASC 350-40 "Intangibles—Goodwill and Other—Internal-Use Software" to determine which implementation costs to capitalize as assets or expense as incurred. Capitalized implementation costs related to a hosting arrangement that is a service contract are amortized over the term of the hosting arrangement, beginning when the module or component of the hosting arrangement is ready for its intended use. The guidance was effective for annual periods beginning after December 15, 2019, and interim periods within those annual periods; early adoption was permitted and either retrospective or prospective application was required for all implementation costs incurred after the date of adoption. We have early adopted this guidance prospectively as of December 31, 2018, the beginning of fiscal year 2019, and the adoption did not have any material impact on our results of operations. In January 2017, the FASB issued ASU 2017-04, "Simplifying the Test for Goodwill Impairment," which amended ASC 350 "Intangibles—Goodwill and Other." This ASU simplified the accounting for goodwill impairments and allowed a goodwill impairment charge to be based upon the amount of a reporting unit's carrying value in excess of its fair value; thus, eliminating what is currently known as "Step 2" under the current guidance. This ASU was effective for annual periods beginning after December 15, 2019, and interim periods within those annual periods; early adoption was permitted and prospective application was required. We have early adopted this guidance prospectively as of December 31, 2018, the beginning of fiscal year 2019, and the adoption did not have a material impact on our financial statements. In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)," which replaces the existing guidance in ASC 840, "Leases." This standard was supplemented by ASUs 2018-01, 2018-10, 2018-11 and 2019-01. The updated standards aim to increase transparency and comparability among organizations by requiring lessees to recognize right-of-use ("ROU") assets and lease liabilities on the balance sheet and requiring disclosure of key information about leasing arrangements. The transition option in ASU 2018-11 allows entities to not apply the standards to the comparative periods they present in their financial statements in the year of adoption. These ASUs were effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods; early adoption was permitted. We have elected to adopt these standards utilizing the modified retrospective method as of December 31, 2018, with the package of practical expedients permitted under the transition guidance of the new standards, which allowed us to not reassess whether any expired or existing contracts contain leases, to carry forward the historical lease classification and permitted us to exclude from our assessment initial direct costs for any existing leases. Additionally, we have elected to utilize the practical expedient which allows us to account for each separate lease component and the non-lease components associated with that lease component as a single lease component. We also made an accounting policy election to exclude leases with an initial term of twelve months or less from our transition adjustment. Lease payments are recognized in the consolidated statements of comprehensive income on a straight-line basis over the lease term. The adoption of the standard resulted in the recognition of a ROU asset and lease liability for our operating leases of $108.0 million and $113.9 million , respectively, as of December 31, 2018. Our operating leases include leases for real estate and machinery and equipment and we have no material finance leases. The difference between the opening ROU asset and lease liability amounts was due to the reclassification of the existing deferred rent liability balance against the opening ROU assets to which it related. The standard did not materially affect our results of operations, liquidity or compliance with our debt covenants under our current agreements. Additional transition disclosures, including our updated lease accounting policy, are included in Note 6. Other Recent Accounting Pronouncements not yet Adopted

Acquisitions and Disposition

Acquisitions and Disposition	3 Months Ended
	Mar. 31, 2019
Business Combinations [Abstract]
Acquisitions and Disposition	Acquisitions and Disposition 2018 Acquisitions On November 1, 2018, we completed the acquisition of the operating assets of Bridgewater Wholesalers Inc. ("BWI") for cash considerations of $22.3 million , net of cash acquired. BWI is headquartered in Branchburg, New Jersey, and is a fabricator and distributor of residential interior and exterior door systems, supporting customers in the Mid-Atlantic and Northeastern United States. Their product offerings include residential interior and exterior doors, commercial doors and hardware as well as value added pre-finishing services. The excess purchase price over the fair value of net assets acquired of $3.7 million was allocated to goodwill. The goodwill principally represents anticipated synergies to be gained from the integration into our existing North American Residential business and the goodwill is deductible for tax purposes. On June 1, 2018, we completed the acquisition of the operating assets of the wood door companies of AADG, Inc., including the brands Graham Manufacturing Corporation and The Maiman Company (collectively, "Graham & Maiman"). We acquired the operating assets of Graham & Maiman for cash consideration of $39.0 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 excess purchase price over the fair value of net assets acquired of $11.0 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 and the goodwill is not deductible for tax purposes. The fair value of assets acquired and liabilities assumed in the 2018 acquisitions are as follows: (In thousands) BWI Graham & Maiman DW3 Total 2018 Acquisitions Accounts receivable $ 9,215 $ — $ 8,590 $ 17,805 Inventory 10,736 6,090 5,059 21,885 Property, plant and equipment 2,222 19,557 8,196 29,975 Goodwill 3,739 10,996 33,623 48,358 Intangible assets 2,970 2,750 62,873 68,593 Accounts payable and accrued expenses (6,816 ) (426 ) (10,418 ) (17,660 ) Deferred income taxes — — (11,546 ) (11,546 ) Other assets and liabilities, net 240 — (68 ) 172 Cash consideration, net of cash acquired $ 22,306 $ 38,967 $ 96,309 $ 157,582 During the three months ended March 31, 2019 , we finalized the purchase price allocation for the BWI acquisition, which resulted in a $0.4 million increase in goodwill due to final working capital adjustments. 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. The gross contractual value of acquired trade receivables was $9.3 million and $9.1 million for the BWI and DW3 acquisitions, respectively. Intangible assets acquired from the 2018 acquisitions consist of the following: (In thousands) BWI Expected Useful Life (Years) Graham & Maiman Expected Useful Life (Years) DW3 Expected Useful Life (Years) Customer relationships $ 1,200 10.0 $ 2,400 10.0 $ 49,554 10.0 Trademarks and trade names 900 10.0 350 1.5 11,785 10.0 Patents — — 1,420 10.0 Other 870 2.2 — 114 3.0 Total intangible assets acquired $ 2,970 $ 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 for the periods indicated subsequent to the acquisition date: Three Months Ended March 31, 2019 (In thousands) BWI Graham & Maiman DW3 Total 2018 Acquisitions Net sales $ 21,943 $ 16,656 $ 19,662 $ 58,261 Net income attributable to Masonite 78 220 2,857 3,155 Three Months Ended April 1, 2018 (in thousands) DW3 Net sales $ 11,198 Net income attributable to Masonite 948 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 April 1, 2018 (In thousands, except per share amounts) Masonite BWI Graham & Maiman DW3 Intercompany Eliminations Pro Forma Net sales $ 517,879 23,060 $ 15,599 $ 4,918 $ (11,109 ) $ 550,347 Net income attributable to Masonite 20,826 130 202 81 21,239 Basic earnings per common share $ 0.74 $ 0.75 Diluted earnings per common share 0.73 0.74 Disposition On March 21, 2019, we completed the sale of all of the capital stock of Performance Doorset Solutions Limited ("PDS") for nominal consideration. We have had and will continue to have no continuing involvement with PDS subsequent to the sale, and the purchasers are not considered to be a related party. The disposition of this business resulted in a loss on disposal of subsidiaries of $4.6 million , which was recognized during the first quarter of 2019 in the Europe segment. The total charge consists of $3.6 million relating to the write-off of the net assets sold and other professional fees and $1.0 million

Accounts Receivable

Accounts Receivable	3 Months Ended
	Mar. 31, 2019
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 52.6% and 54.6% of total accounts receivable as of March 31, 2019 , and December 30, 2018 , respectively. Our largest customer, The Home Depot, Inc., accounted for more than 10% of the consolidated gross accounts receivable balance as of March 31, 2019 , and December 30, 2018 . The allowance for doubtful accounts balance was $1.9 million and $2.1 million as of March 31, 2019 , and December 30, 2018 , 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.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2019
Inventory Disclosure [Abstract]
Inventories	Inventories The amounts of inventory on hand were as follows as of the dates indicated: (In thousands) March 31, December 30, Raw materials $ 187,587 $ 189,145 Finished goods 76,326 69,026 Provision for obsolete or aged inventory (8,414 ) (7,764 ) Inventories, net $ 255,499 $ 250,407

Property, Plant and Equipment

Property, Plant and Equipment	3 Months Ended
	Mar. 31, 2019
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) March 31, December 30, Land $ 29,747 $ 30,653 Buildings 181,124 179,888 Machinery and equipment 716,789 724,431 Property, plant and equipment, gross 927,660 934,972 Accumulated depreciation (329,596 ) (325,219 ) Property, plant and equipment, net $ 598,064 $ 609,753 Total depreciation expense was $18.3 million and $13.9 million in the three months ended March 31, 2019 , and April 1, 2018

Leases (Notes)

Leases (Notes)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases of Lessee Disclosure	Leases Lease Accounting Policy Our updated policy for lease accounting, which we adopted prospectively as of December 31, 2018, is as follows: We determine if a contract is a lease at inception or upon acquisition and reevaluate each time a lease contract is amended or otherwise modified. A lease will be classified as an operating lease if it does not meet any of the criteria for a finance lease. Those criteria include the transfer of ownership of the underlying asset by the end of the lease term; an option to purchase the underlying asset that we would be reasonably certain to exercise; the lease term is for the major part of the remaining economic life of the underlying asset; the present value of the sum of the lease payments and any residual value guaranteed by us that is not already reflected in the lease payments equals or exceeds substantially all of the fair value of the underlying asset or if the underlying asset is of such a specialized nature that it is expected to have no alternative use to us at the end of the lease term. The assets and liabilities relating to operating leases are included in operating lease ROU assets, accrued expenses, and long-term operating lease liabilities in our consolidated balance sheets. The assets and liabilities relating to finance leases are included in property, plant and equipment and other long-term liabilities in our consolidated balance sheets. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at the respective lease commencement date based on the present value of lease payments over the expected lease term. Since our leases do not specify implicit discount rates, we use our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any initial direct costs and is adjusted for lease incentives and prepaid or accrued rent. The lease term begins on the date when the lessor makes the underlying asset available for use to us, and our expected lease terms include options to extend the lease when it is reasonably certain that we will exercise those options. Lease payments are recognized in the consolidated statements of comprehensive income on a straight-line basis over the expected lease term. Leases with an initial term of 12 months or less are not recorded on the balance sheet, with the related lease expense recognized on a straight-line basis over the lease term. Lease and non-lease components of a contract are combined into a single lease component for accounting purposes. Current Period Lease Disclosures Our operating leases include leases for real estate (including manufacturing sites, warehouses and offices) and machinery and equipment and we have no material finance leases or subleases. Certain of our operating leases contain provisions for renewal ranging from one to four options of one to ten years each. Total operating lease expense, including non-cancelable operating leases and short-term leases, was $9.2 million and $7.7 million for the three months ended March 31, 2019 , and April 1, 2018 , respectively. The current portion of operating lease liabilities is included with accrued expenses in the consolidated balance sheets. Supplemental balance sheet information as of the period indicated related to operating leases was as follows: (In thousands) March 31, 2019 Operating lease right-of-use assets $ 126,600 Current portion of operating lease liabilities 19,819 Long-term operating lease liabilities 114,426 Total operating lease liabilities $ 134,245 Weighted average remaining lease term (years) 12.4 Weighted average discount rate 4.8 % Maturities of operating lease liabilities are as follows: (In thousands) March 31, 2019 Fiscal year: 2019 (remaining nine months) $ 19,239 2020 24,103 2021 17,273 2022 13,603 2023 11,030 Thereafter 104,357 Total undiscounted lease payments 189,605 Less imputed interest (55,360 ) Total $ 134,245 As of March 31, 2019, we have additional undiscounted commitments for operating leases, primarily for administrative offices, that have not yet commenced of $15.8 million . These operating leases will commence between fiscal year 2019 and fiscal year 2020 with lease terms of 10 years

Goodwill and Intangbile Assets

Goodwill and Intangbile Assets	3 Months Ended
	Mar. 31, 2019
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 30, 2018 $ 6,189 $ 63,220 $ 110,888 $ 180,297 Measurement period adjustment 390 — — 390 Foreign exchange fluctuations 7 2,129 75 2,211 March 31, 2019 $ 6,586 $ 65,349 $ 110,963 $ 182,898 During the three months ended March 31, 2019 , we finalized the purchase price allocation for the BWI acquisition, which resulted in a $0.4 million increase in goodwill due to final working capital adjustments. The cost and accumulated amortization values of our intangible assets were as follows as of the dates indicated: March 31, 2019 December 30, 2018 (In thousands) Cost Accumulated Amortization Net Book Value Cost Accumulated Amortization Net Book Value Definite life intangible assets: Customer relationships $ 177,020 $ (87,129 ) $ 89,891 $ 173,637 $ (81,220 ) $ 92,417 Patents 31,668 (22,429 ) 9,239 31,363 (21,840 ) 9,523 Software 33,042 (30,162 ) 2,880 32,660 (29,296 ) 3,364 Trademarks and tradenames 34,803 (4,906 ) 29,897 33,784 (3,948 ) 29,836 Other 975 (209 ) 766 971 (97 ) 874 Total definite life intangible assets 277,508 (144,835 ) 132,673 272,415 (136,401 ) 136,014 Indefinite life intangible assets: Trademarks and tradenames 76,274 — 76,274 76,031 — 76,031 Total intangible assets $ 353,782 $ (144,835 ) $ 208,947 $ 348,446 $ (136,401 ) $ 212,045 Amortization of intangible assets was $7.2 million and $6.1 million for the three months ended March 31, 2019 , and April 1, 2018 , respectively. Amortization expense is classified within selling, general and administration expenses in the condensed consolidated statements of comprehensive income. The estimated future amortization of intangible assets with definite lives is as follows: (In thousands) March 31, 2019 Fiscal year: 2019 (remaining nine months) $ 21,465 2020 22,735 2021 19,118 2022 15,656 2023 14,158

Accrued Expenses

Accrued Expenses	3 Months Ended
	Mar. 31, 2019
Accrued Expenses [Abstract]
Accrued expenses	Accrued Expenses The details of our accrued expenses were as follows as of the dates indicated: (In thousands) March 31, December 30, Accrued payroll $ 42,493 $ 39,823 Accrued rebates 31,703 36,711 Current portion of operating lease liabilities 19,819 — Accrued interest 2,365 14,570 Other accruals 51,542 56,241 Total accrued expenses $ 147,922 $ 147,345

Long-Term Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt (In thousands) March 31, December 30, 5.625% senior unsecured notes due 2023 $ 500,000 $ 500,000 5.75% senior unsecured notes due 2026 300,000 300,000 Unamortized premium on 2023 Notes 3,463 3,684 Debt issuance costs (8,009 ) (8,394 ) Other long-term debt 1,132 1,108 Total long-term debt $ 796,586 $ 796,398 Interest expense related to our consolidated indebtedness under senior unsecured notes was $11.3 million and $8.7 million for the three months ended March 31, 2019 , and April 1, 2018 , respectively. 5.75% Senior Notes due 2026 On August 27, 2018, we issued $300.0 million aggregate principal senior unsecured notes (the "2026 Notes"). The 2026 Notes were issued in a private placement 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 of the United States pursuant to Regulation S under the Securities Act. The 2026 Notes were issued without registration rights and are not listed on any securities exchange. The 2026 Notes bear interest at 5.75% per annum, payable in cash semiannually in arrears on March 15 and September 15 of each year and are due September 15, 2026. The 2026 notes were issued at par. We received net proceeds of $295.7 million after deducting $4.3 million of debt issuance costs. 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 2026 Notes using the effective interest method. The net proceeds from issuance of the 2026 Notes were used to redeem $125.0 million aggregate principal amount of the 2023 Notes (as described below), including the payment of related premiums, fees and expenses, with the balance of the proceeds available for general corporate purposes. Subsequent to the closing of the 2026 Notes offering, the 2023 Notes were partially redeemed, with that portion of the notes considered extinguished as of September 12, 2018. Under the terms of the indenture governing the 2023 Notes, we paid the applicable premium of $5.3 million . Additionally, the proportionate shares of the unamortized premium of $1.0 million and unamortized debt issuance costs of $1.1 million relating to the 2023 Notes were written off in conjunction with the partial extinguishment of the 2023 Notes. The resulting loss on extinguishment of debt was $5.4 million and is recorded as part of income (loss) from continuing operations before income tax expense (benefit) in the consolidated statements of comprehensive income. Additionally, the cash payment of interest accrued to, but not including, the redemption date was accelerated to the redemption date. Obligations under the 2026 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 2026 Notes, in whole or in part, at any time on or after September 15, 2021, at the applicable redemption prices specified under the indenture governing the 2026 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 2026 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 2026 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 2026 Notes. In addition, if in the future the 2026 Notes have an investment grade rating from at least two nationally recognized statistical rating organizations, certain of these covenants will be terminated. The indenture governing the 2026 Notes contains customary events of default (subject in certain cases to customary grace and cure periods). As of March 31, 2019 , and December 30, 2018, we were in compliance with all covenants under the indenture governing the 2026 Notes. 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, 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 March 31, 2019 , and December 30, 2018 , we were in compliance with all covenants under the indenture governing the 2023 Notes. ABL Facility On January 31, 2019, we and certain of our subsidiaries amended and restated our asset-based revolving credit facility (the "ABL Facility") in order to extend the maturity date of the ABL Facility and amend certain other provisions. The amended and restated ABL Facility increased the revolving commitments to $250.0 million from $150.0 million and extended the final maturity date to January 31, 2024, from April 9, 2020. The borrowing base is calculated based on a percentage of the value of selected U.S., Canadian and U.K. accounts receivable and inventory, less certain ineligible amounts. Obligations under the ABL Facility are secured by a first priority security interest in such accounts receivable, inventory and other related assets of Masonite and our 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 opinion, (i) the U.S., Canadian or U.K. Base Rate (each as defined in the credit agreement relating to the ABL Facility, the "Amended and Restated Credit Agreement") plus a margin ranging from 0.25% to 0.50% per annum, or (ii) the Adjusted LIBO Rate or BA Rate (each as defined in the Amended and Restated Credit Agreement), plus a margin ranging from 1.25% to 1.50% 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 existing exceptions). As of March 31, 2019 , and December 30, 2018 , 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	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The following discussion describes material developments in previously disclosed legal proceedings that occurred since December 30, 2018. 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 30, 2018, for a full description of the previously disclosed legal proceedings. Class Action Proceedings With respect to the consolidated purported class action direct purchaser and end-purchaser complaints filed against us and JELD-WEN, Inc., the judge denied our motion to transfer the proceedings from the Eastern District of Virginia, Richmond Division. On March 1, 2019, we filed a motion to dismiss all of the claims in both of these complaints.

Share Based Compensation Plans

Share Based Compensation Plans	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share Based Compensation Plans	Share Based Compensation Plans Share based compensation expense was $2.7 million and $3.1 million for the three months ended March 31, 2019 , and April 1, 2018 , respectively. As of March 31, 2019 , the total remaining unrecognized compensation expense related to share based compensation amounted to $22.1 million , which will be amortized over the weighted average remaining requisite service period of 2.2 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. 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 Our equity incentive plans under the 2009 Plan and the 2012 Plan are described in detail and defined in our Annual Report on Form 10-K for the year ended December 30, 2018. 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 March 31, 2019 , there were 742,651 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, which is described in detail in our Annual Report on Form 10-K for the year ended December 30, 2018. As of March 31, 2019 , the liability and asset relating to deferred compensation had a fair value of $6.1 million and $6.2 million , respectively. 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. As of March 31, 2019 , 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 $1.1 million and $0.7 million during the three months ended March 31, 2019 , and April 1, 2018 , respectively. Three Months Ended March 31, 2019 Stock Appreciation Rights Aggregate Intrinsic Value (in thousands) Weighted Average Exercise Price Average Remaining Contractual Life (Years) Outstanding, beginning of period 514,313 $ 7,254 $ 39.01 4.6 Granted 54,585 57.52 Exercised (29,288 ) 1,060 18.69 Outstanding, end of period 539,610 $ 7,632 $ 41.99 5.2 Exercisable, end of period 422,248 $ 7,632 $ 36.10 4.0 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: 2019 Grants SAR value (model conclusion) $ 15.82 Risk-free rate 2.5 % Expected dividend yield 0.0 % Expected volatility 22.0 % Expected term (years) 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. Three Months Ended March 31, 2019 Total Restricted Stock Units Outstanding Weighted Average Grant Date Fair Value Outstanding, beginning of period 429,027 $ 66.03 Granted 245,468 56.95 Performance adjustment (1) (21,953 ) 57.51 Delivered (97,858 ) Withheld to cover (2) (19,061 ) Forfeited (9,691 ) Outstanding, end of period 525,932 $ 63.13 ____________ (1) Performance-based RSUs are presented as outstanding, granted and forfeited in the table above assuming targets are met and the awards pay out at 100%. The performance adjustment represents the difference in shares ultimately awarded due to performance attainment above or below target. (2) 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 three-fourths of the RSUs granted during the three months ended March 31, 2019 , 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 three months ended March 31, 2019 , is being recognized over the weighted average requisite service period of 2.4 years. 116,919 RSUs vested during the three months ended March 31, 2019 , at a fair value of $7.2 million

Restructuring Costs

Restructuring Costs	3 Months Ended
	Mar. 31, 2019
Restructuring and Related Activities [Abstract]
Restructuring Costs	Restructuring Costs Restructuring costs were not material in the three months ended April 1, 2018 . The following table summarizes the restructuring charges recorded for the periods indicated: Three Months Ended March 31, 2019 (In thousands) North American Residential Europe Architectural Corporate & Other Total 2019 Plan $ 1,459 $ 331 $ 604 $ 394 $ 2,788 2018 Plan 421 531 — — 952 Total Restructuring Costs $ 1,880 $ 862 $ 604 $ 394 $ 3,740 Cumulative Amount Incurred Through March 31, 2019 (In thousands) North American Residential Europe Architectural Corporate & Other Total 2019 Plan $ 1,459 $ 331 $ 604 $ 394 $ 2,788 2018 Plan 696 1,880 — — 2,576 2016 Plan — — 3,707 — 3,707 2014 Plan — — — 7,993 7,993 Total Restructuring Costs $ 2,155 $ 2,211 $ 4,311 $ 8,387 $ 17,064 In February 2019, we began implementing a plan to improve overall business performance that includes the reorganization of our manufacturing capacity and a reduction of our overhead and selling, general and administration workforce across all of our reportable segments and in our head offices. The reorganization of our manufacturing capacity involves specific plants in the North American Residential and Architectural segments and costs associated with the closure of these plants and related headcount reductions have begun taking place in the first quarter of 2019 (collectively, the "2019 Plan"). Costs associated with the 2019 Plan include severance, retention and closure charges and will continue through 2020. As of March 31, 2019 , we expect to incur approximately $10 million to $12 million of additional charges related to the 2019 Plan. During the fourth quarter of 2018, we began implementing a plan to reorganize and consolidate certain aspects of our United Kingdom head office function and optimize our portfolio by divesting non-core assets to enable more effective and consistent business processes in the Europe segment. In addition, in the North America segment we announced a new facility that will optimize and expand capacity through increased automation, which will result in the closure of one existing facility and related headcount reductions beginning in the second quarter of 2019 (collectively, the "2018 Plan"). Costs associated with the 2018 Plan include severance, retention and closure charges and will continue throughout 2019. Additionally, the plan to divest non-core assets was determined to be a triggering event requiring a test of the carrying value of the definite-lived assets relating to the divestitures, as further described in Note 13. As of March 31, 2019 , we expect to incur approximately $2 million of additional charges related to the 2018 Plan. 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 30, 2018. Costs and actions associated with these restructuring plans include severance and closure charges and are substantially completed. As of March 31, 2019 , we do not expect to incur any material future charges relating to our restructuring plans initiated in 2016 and prior years. Other plans initiated in prior years did not have a material impact on the consolidated statements of comprehensive income or consolidated statements of cash flows for the three months ended March 31, 2019 , or April 1, 2018 , or on the consolidated balance sheets as of March 31, 2019 , or December 30, 2018. The changes in the accrual for restructuring by activity were as follows for the periods indicated: (In thousands) December 30, Severance Closure Costs Cash Payments March 31, 2019 Plan $ — $ 2,770 $ 18 $ (1,035 ) $ 1,753 2018 Plan 596 983 (31 ) (546 ) 1,002 Other 58 — — (17 ) 41 Total $ 654 $ 3,753 $ (13 ) $ (1,598 ) $ 2,796 (In thousands) December 31, Cash Payments April 1, 2016 Plan $ 90 $ (90 ) $ — Other 194 (43 ) 151 Total $ 284 $ (133 ) $ 151

Asset Impairment

Asset Impairment	3 Months Ended
	Mar. 31, 2019
Asset Impairment Charges [Abstract]
Asset Impairment	Asset Impairment During the three months ended March 31, 2019 , we recognized non-cash asset impairment charges of $10.6 million related to two asset groups in the North American Residential segment, as a result of announced plant closures under the 2019 Plan. This amount was determined based upon the excess of the asset groups' carrying values of property, plant and equipment over the respective fair values of such assets, determined using a discounted cash flows approach for each asset group. Each of these valuations was performed on a non-recurring basis and is categorized as having Level 3 valuation inputs as established by the FASB's Fair Value Framework. The Level 3 unobservable inputs include an estimate of future cash flows and the salvage value for each of the asset groups. The fair value of the asset groups was determined to be $11.3 million , compared to a book value of $21.9 million

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rate differs from the Canadian statutory rate of 26.5% primarily due to mix of earnings in foreign jurisdictions that are subject to tax rates which differ from the Canadian statutory rate and changes in our valuation allowances. In addition, we recognized $0.1 million of income tax expense due to the exercise and delivery of share-based awards during the three months ended March 31, 2019 , compared to $0.2 million of income tax benefit during the three months ended April 1, 2018

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2019
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 March 31, 2019 April 1, 2018 Net income attributable to Masonite $ 3,789 $ 20,826 Shares used in computing basic earnings per share 25,574,910 28,189,790 Effect of dilutive securities: Incremental shares issuable under share compensation plans 376,574 482,472 Shares used in computing diluted earnings per share 25,951,484 28,672,262 Basic earnings per common share attributable to Masonite $ 0.15 $ 0.74 Diluted earnings per common share attributable to Masonite $ 0.15 $ 0.73 Anti-dilutive instruments excluded from diluted earnings per common share: Stock appreciation rights 235,650 51,129

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2019
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 indentures governing the 2026 Notes and 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: Three Months Ended March 31, 2019 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 354,802 $ 84,739 $ 88,353 $ 6,728 $ 534,622 Intersegment sales (1,077 ) (472 ) (2,762 ) — (4,311 ) Net sales to external customers $ 353,725 $ 84,267 $ 85,591 $ 6,728 $ 530,311 Adjusted EBITDA $ 53,621 $ 9,997 $ 7,614 $ (5,753 ) $ 65,479 Three Months Ended April 1, 2018 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 360,542 $ 87,752 $ 71,564 $ 4,424 $ 524,282 Intersegment sales (862 ) (648 ) (4,893 ) — (6,403 ) Net sales to external customers $ 359,680 $ 87,104 $ 66,671 $ 4,424 $ 517,879 Adjusted EBITDA $ 50,398 $ 9,930 $ 7,660 $ (6,574 ) $ 61,414 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 (In thousands) March 31, 2019 April 1, 2018 Adjusted EBITDA $ 65,479 $ 61,414 Less (plus): Depreciation 18,285 13,934 Amortization 7,597 6,585 Share based compensation expense 2,680 3,065 Loss on disposal of property, plant and equipment 2,913 612 Restructuring costs 3,740 — Asset impairment 10,625 — Loss on disposal of subsidiaries 4,605 — Interest expense, net 11,127 8,756 Other income, net of expense (1,130 ) (22 ) Income tax expense 58 6,701 Net income attributable to non-controlling interest 1,190 957 Net income attributable to Masonite $ 3,789 $ 20,826

Other Comprehensive Income and

Other Comprehensive Income and Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Other Comprehensive Income and Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income and Other Comprehensive Income A rollforward of the components of accumulated other comprehensive income (loss) is as follows for the periods indicated: Three Months Ended (In thousands) March 31, 2019 April 1, 2018 Accumulated foreign currency translation losses, beginning of period $ (129,930 ) $ (89,824 ) Foreign currency translation gain 12,990 5,774 Income tax benefit (expense) on foreign currency translation gain 12 (22 ) Cumulative translation adjustment recognized upon deconsolidation of subsidiary 1,001 — Less: foreign currency translation gain (loss) attributable to non-controlling interest 216 (243 ) Accumulated foreign currency translation losses, end of period (116,143 ) (83,829 ) Accumulated pension and other post-retirement adjustments, beginning of period (22,989 ) (20,328 ) Amortization of actuarial net losses 404 300 Income tax expense on amortization of actuarial net losses (105 ) (78 ) Accumulated pension and other post-retirement adjustments (22,690 ) (20,106 ) Accumulated other comprehensive loss $ (138,833 ) $ (103,935 ) Other comprehensive income, net of tax $ 14,302 $ 5,974 Less: other comprehensive income (loss) attributable to non-controlling interest 216 (243 ) Other comprehensive income attributable to Masonite $ 14,086 $ 6,217

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	3 Months Ended
	Mar. 31, 2019
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: Three Months Ended (In thousands) March 31, 2019 April 1, 2018 Transactions involving cash: Interest paid $ 23,785 $ 17,337 Interest received 672 400 Income taxes paid 1,308 1,583 Income tax refunds — 70 Cash paid for operating lease liabilities 6,290 — Non-cash transactions: Right-of-use assets acquired under operating leases 20,289 — The following reconciles total cash, cash equivalents and restricted cash as of the dates indicated: March 31, 2019 December 30, 2018 Cash and cash equivalents $ 79,642 $ 115,656 Restricted cash 10,985 10,485 Total cash, cash equivalents and restricted cash $ 90,627 $ 126,141 Property, plant and equipment additions in accounts payable were $3.5 million and $8.7 million as of March 31, 2019 , and December 30, 2018

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2019
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 2026 Notes as of March 31, 2019 , was $303.7 million , compared to a carrying value of $296.0 million , and as of December 30, 2018 , was $282.6 million , compared to a carrying value of $295.8 million . The estimated fair value of the 2023 Notes as of March 31, 2019 , was $511.0 million , compared to a carrying value of $499.5 million , and as of December 30, 2018 , was $484.9 million , compared to a carrying value of $499.5 million

Business Overview and Signifi_2

Business Overview and Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
New Accounting Pronouncements	Adoption of Recent Accounting Pronouncements In August 2018, the FASB issued ASU 2018-15, "Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." This ASU amended the definition of a hosting arrangement and required a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in ASC 350-40 "Intangibles—Goodwill and Other—Internal-Use Software" to determine which implementation costs to capitalize as assets or expense as incurred. Capitalized implementation costs related to a hosting arrangement that is a service contract are amortized over the term of the hosting arrangement, beginning when the module or component of the hosting arrangement is ready for its intended use. The guidance was effective for annual periods beginning after December 15, 2019, and interim periods within those annual periods; early adoption was permitted and either retrospective or prospective application was required for all implementation costs incurred after the date of adoption. We have early adopted this guidance prospectively as of December 31, 2018, the beginning of fiscal year 2019, and the adoption did not have any material impact on our results of operations. In January 2017, the FASB issued ASU 2017-04, "Simplifying the Test for Goodwill Impairment," which amended ASC 350 "Intangibles—Goodwill and Other." This ASU simplified the accounting for goodwill impairments and allowed a goodwill impairment charge to be based upon the amount of a reporting unit's carrying value in excess of its fair value; thus, eliminating what is currently known as "Step 2" under the current guidance. This ASU was effective for annual periods beginning after December 15, 2019, and interim periods within those annual periods; early adoption was permitted and prospective application was required. We have early adopted this guidance prospectively as of December 31, 2018, the beginning of fiscal year 2019, and the adoption did not have a material impact on our financial statements. In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)," which replaces the existing guidance in ASC 840, "Leases." This standard was supplemented by ASUs 2018-01, 2018-10, 2018-11 and 2019-01. The updated standards aim to increase transparency and comparability among organizations by requiring lessees to recognize right-of-use ("ROU") assets and lease liabilities on the balance sheet and requiring disclosure of key information about leasing arrangements. The transition option in ASU 2018-11 allows entities to not apply the standards to the comparative periods they present in their financial statements in the year of adoption. These ASUs were effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods; early adoption was permitted. We have elected to adopt these standards utilizing the modified retrospective method as of December 31, 2018, with the package of practical expedients permitted under the transition guidance of the new standards, which allowed us to not reassess whether any expired or existing contracts contain leases, to carry forward the historical lease classification and permitted us to exclude from our assessment initial direct costs for any existing leases. Additionally, we have elected to utilize the practical expedient which allows us to account for each separate lease component and the non-lease components associated with that lease component as a single lease component. We also made an accounting policy election to exclude leases with an initial term of twelve months or less from our transition adjustment. Lease payments are recognized in the consolidated statements of comprehensive income on a straight-line basis over the lease term. The adoption of the standard resulted in the recognition of a ROU asset and lease liability for our operating leases of $108.0 million and $113.9 million , respectively, as of December 31, 2018. Our operating leases include leases for real estate and machinery and equipment and we have no material finance leases. The difference between the opening ROU asset and lease liability amounts was due to the reclassification of the existing deferred rent liability balance against the opening ROU assets to which it related. The standard did not materially affect our results of operations, liquidity or compliance with our debt covenants under our current agreements. Additional transition disclosures, including our updated lease accounting policy, are included in Note 6. Other Recent Accounting Pronouncements not yet Adopted

Leases (Policies)

Leases (Policies)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Lease accounting policy	Lease Accounting Policy Our updated policy for lease accounting, which we adopted prospectively as of December 31, 2018, is as follows: We determine if a contract is a lease at inception or upon acquisition and reevaluate each time a lease contract is amended or otherwise modified. A lease will be classified as an operating lease if it does not meet any of the criteria for a finance lease. Those criteria include the transfer of ownership of the underlying asset by the end of the lease term; an option to purchase the underlying asset that we would be reasonably certain to exercise; the lease term is for the major part of the remaining economic life of the underlying asset; the present value of the sum of the lease payments and any residual value guaranteed by us that is not already reflected in the lease payments equals or exceeds substantially all of the fair value of the underlying asset or if the underlying asset is of such a specialized nature that it is expected to have no alternative use to us at the end of the lease term. The assets and liabilities relating to operating leases are included in operating lease ROU assets, accrued expenses, and long-term operating lease liabilities in our consolidated balance sheets. The assets and liabilities relating to finance leases are included in property, plant and equipment and other long-term liabilities in our consolidated balance sheets. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at the respective lease commencement date based on the present value of lease payments over the expected lease term. Since our leases do not specify implicit discount rates, we use our incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any initial direct costs and is adjusted for lease incentives and prepaid or accrued rent. The lease term begins on the date when the lessor makes the underlying asset available for use to us, and our expected lease terms include options to extend the lease when it is reasonably certain that we will exercise those options. Lease payments are recognized in the consolidated statements of comprehensive income on a straight-line basis over the expected lease term.

Acquisitions and Disposition (T

Acquisitions and Disposition (Tables)	3 Months Ended
	Mar. 31, 2019
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	Intangible assets acquired from the 2018 acquisitions consist of the following: (In thousands) BWI Expected Useful Life (Years) Graham & Maiman Expected Useful Life (Years) DW3 Expected Useful Life (Years) Customer relationships $ 1,200 10.0 $ 2,400 10.0 $ 49,554 10.0 Trademarks and trade names 900 10.0 350 1.5 11,785 10.0 Patents — — 1,420 10.0 Other 870 2.2 — 114 3.0 Total intangible assets acquired $ 2,970 $ 2,750 $ 62,873
Pro forma information of acquisitions	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 April 1, 2018 (In thousands, except per share amounts) Masonite BWI Graham & Maiman DW3 Intercompany Eliminations Pro Forma Net sales $ 517,879 23,060 $ 15,599 $ 4,918 $ (11,109 ) $ 550,347 Net income attributable to Masonite 20,826 130 202 81 21,239 Basic earnings per common share $ 0.74 $ 0.75 Diluted earnings per common share 0.73 0.74
2018 Acquisitions
Business Acquisition [Line Items]
Aggregate consideration paid for acquisitions	The fair value of assets acquired and liabilities assumed in the 2018 acquisitions are as follows: (In thousands) BWI Graham & Maiman DW3 Total 2018 Acquisitions Accounts receivable $ 9,215 $ — $ 8,590 $ 17,805 Inventory 10,736 6,090 5,059 21,885 Property, plant and equipment 2,222 19,557 8,196 29,975 Goodwill 3,739 10,996 33,623 48,358 Intangible assets 2,970 2,750 62,873 68,593 Accounts payable and accrued expenses (6,816 ) (426 ) (10,418 ) (17,660 ) Deferred income taxes — — (11,546 ) (11,546 ) Other assets and liabilities, net 240 — (68 ) 172 Cash consideration, net of cash acquired $ 22,306 $ 38,967 $ 96,309 $ 157,582
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 for the periods indicated subsequent to the acquisition date: Three Months Ended March 31, 2019 (In thousands) BWI Graham & Maiman DW3 Total 2018 Acquisitions Net sales $ 21,943 $ 16,656 $ 19,662 $ 58,261 Net income attributable to Masonite 78 220 2,857 3,155 Three Months Ended April 1, 2018 (in thousands) DW3 Net sales $ 11,198 Net income attributable to Masonite 948

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2019
Inventory Disclosure [Abstract]
Inventories	The amounts of inventory on hand were as follows as of the dates indicated: (In thousands) March 31, December 30, Raw materials $ 187,587 $ 189,145 Finished goods 76,326 69,026 Provision for obsolete or aged inventory (8,414 ) (7,764 ) Inventories, net $ 255,499 $ 250,407

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	3 Months Ended
	Mar. 31, 2019
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) March 31, December 30, Land $ 29,747 $ 30,653 Buildings 181,124 179,888 Machinery and equipment 716,789 724,431 Property, plant and equipment, gross 927,660 934,972 Accumulated depreciation (329,596 ) (325,219 ) Property, plant and equipment, net $ 598,064 $ 609,753

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Supplemental Balance Sheet Information Related to Leases	Supplemental balance sheet information as of the period indicated related to operating leases was as follows: (In thousands) March 31, 2019 Operating lease right-of-use assets $ 126,600 Current portion of operating lease liabilities 19,819 Long-term operating lease liabilities 114,426 Total operating lease liabilities $ 134,245 Weighted average remaining lease term (years) 12.4 Weighted average discount rate 4.8 %
Maturities of operating lease liabilities	Maturities of operating lease liabilities are as follows: (In thousands) March 31, 2019 Fiscal year: 2019 (remaining nine months) $ 19,239 2020 24,103 2021 17,273 2022 13,603 2023 11,030 Thereafter 104,357 Total undiscounted lease payments 189,605 Less imputed interest (55,360 ) Total $ 134,245

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2019
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 30, 2018 $ 6,189 $ 63,220 $ 110,888 $ 180,297 Measurement period adjustment 390 — — 390 Foreign exchange fluctuations 7 2,129 75 2,211 March 31, 2019 $ 6,586 $ 65,349 $ 110,963 $ 182,898
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: March 31, 2019 December 30, 2018 (In thousands) Cost Accumulated Amortization Net Book Value Cost Accumulated Amortization Net Book Value Definite life intangible assets: Customer relationships $ 177,020 $ (87,129 ) $ 89,891 $ 173,637 $ (81,220 ) $ 92,417 Patents 31,668 (22,429 ) 9,239 31,363 (21,840 ) 9,523 Software 33,042 (30,162 ) 2,880 32,660 (29,296 ) 3,364 Trademarks and tradenames 34,803 (4,906 ) 29,897 33,784 (3,948 ) 29,836 Other 975 (209 ) 766 971 (97 ) 874 Total definite life intangible assets 277,508 (144,835 ) 132,673 272,415 (136,401 ) 136,014 Indefinite life intangible assets: Trademarks and tradenames 76,274 — 76,274 76,031 — 76,031 Total intangible assets $ 353,782 $ (144,835 ) $ 208,947 $ 348,446 $ (136,401 ) $ 212,045
Estimated future amortization of intangible assets with definite lives	The estimated future amortization of intangible assets with definite lives is as follows: (In thousands) March 31, 2019 Fiscal year: 2019 (remaining nine months) $ 21,465 2020 22,735 2021 19,118 2022 15,656 2023 14,158

Accrued Expenses (Tables)

Accrued Expenses (Tables)	3 Months Ended
	Mar. 31, 2019
Accrued Expenses [Abstract]
Schedule of Accrued Expenses	The details of our accrued expenses were as follows as of the dates indicated: (In thousands) March 31, December 30, Accrued payroll $ 42,493 $ 39,823 Accrued rebates 31,703 36,711 Current portion of operating lease liabilities 19,819 — Accrued interest 2,365 14,570 Other accruals 51,542 56,241 Total accrued expenses $ 147,922 $ 147,345

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Schedule of long-term debt	(In thousands) March 31, December 30, 5.625% senior unsecured notes due 2023 $ 500,000 $ 500,000 5.75% senior unsecured notes due 2026 300,000 300,000 Unamortized premium on 2023 Notes 3,463 3,684 Debt issuance costs (8,009 ) (8,394 ) Other long-term debt 1,132 1,108 Total long-term debt $ 796,586 $ 796,398

Share Based Compensation Plans

Share Based Compensation Plans (Tables)	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock appreciation rights award activity	Three Months Ended March 31, 2019 Stock Appreciation Rights Aggregate Intrinsic Value (in thousands) Weighted Average Exercise Price Average Remaining Contractual Life (Years) Outstanding, beginning of period 514,313 $ 7,254 $ 39.01 4.6 Granted 54,585 57.52 Exercised (29,288 ) 1,060 18.69 Outstanding, end of period 539,610 $ 7,632 $ 41.99 5.2 Exercisable, end of period 422,248 $ 7,632 $ 36.10 4.0
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: 2019 Grants SAR value (model conclusion) $ 15.82 Risk-free rate 2.5 % Expected dividend yield 0.0 % Expected volatility 22.0 % Expected term (years) 6.0
Restricted stock units award activity	Three Months Ended March 31, 2019 Total Restricted Stock Units Outstanding Weighted Average Grant Date Fair Value Outstanding, beginning of period 429,027 $ 66.03 Granted 245,468 56.95 Performance adjustment (1) (21,953 ) 57.51 Delivered (97,858 ) Withheld to cover (2) (19,061 ) Forfeited (9,691 ) Outstanding, end of period 525,932 $ 63.13 ____________ (1) Performance-based RSUs are presented as outstanding, granted and forfeited in the table above assuming targets are met and the awards pay out at 100%. The performance adjustment represents the difference in shares ultimately awarded due to performance attainment above or below target. (2) 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)	3 Months Ended
	Mar. 31, 2019
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 March 31, 2019 (In thousands) North American Residential Europe Architectural Corporate & Other Total 2019 Plan $ 1,459 $ 331 $ 604 $ 394 $ 2,788 2018 Plan 421 531 — — 952 Total Restructuring Costs $ 1,880 $ 862 $ 604 $ 394 $ 3,740 Cumulative Amount Incurred Through March 31, 2019 (In thousands) North American Residential Europe Architectural Corporate & Other Total 2019 Plan $ 1,459 $ 331 $ 604 $ 394 $ 2,788 2018 Plan 696 1,880 — — 2,576 2016 Plan — — 3,707 — 3,707 2014 Plan — — — 7,993 7,993 Total Restructuring Costs $ 2,155 $ 2,211 $ 4,311 $ 8,387 $ 17,064
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 30, Severance Closure Costs Cash Payments March 31, 2019 Plan $ — $ 2,770 $ 18 $ (1,035 ) $ 1,753 2018 Plan 596 983 (31 ) (546 ) 1,002 Other 58 — — (17 ) 41 Total $ 654 $ 3,753 $ (13 ) $ (1,598 ) $ 2,796 (In thousands) December 31, Cash Payments April 1, 2016 Plan $ 90 $ (90 ) $ — Other 194 (43 ) 151 Total $ 284 $ (133 ) $ 151

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	(In thousands, except share and per share information) Three Months Ended March 31, 2019 April 1, 2018 Net income attributable to Masonite $ 3,789 $ 20,826 Shares used in computing basic earnings per share 25,574,910 28,189,790 Effect of dilutive securities: Incremental shares issuable under share compensation plans 376,574 482,472 Shares used in computing diluted earnings per share 25,951,484 28,672,262 Basic earnings per common share attributable to Masonite $ 0.15 $ 0.74 Diluted earnings per common share attributable to Masonite $ 0.15 $ 0.73 Anti-dilutive instruments excluded from diluted earnings per common share: Stock appreciation rights 235,650 51,129

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Certain information with respect to segments is as follows for the periods indicated: Three Months Ended March 31, 2019 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 354,802 $ 84,739 $ 88,353 $ 6,728 $ 534,622 Intersegment sales (1,077 ) (472 ) (2,762 ) — (4,311 ) Net sales to external customers $ 353,725 $ 84,267 $ 85,591 $ 6,728 $ 530,311 Adjusted EBITDA $ 53,621 $ 9,997 $ 7,614 $ (5,753 ) $ 65,479 Three Months Ended April 1, 2018 (In thousands) North American Residential Europe Architectural Corporate & Other Total Net sales $ 360,542 $ 87,752 $ 71,564 $ 4,424 $ 524,282 Intersegment sales (862 ) (648 ) (4,893 ) — (6,403 ) Net sales to external customers $ 359,680 $ 87,104 $ 66,671 $ 4,424 $ 517,879 Adjusted EBITDA $ 50,398 $ 9,930 $ 7,660 $ (6,574 ) $ 61,414
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 (In thousands) March 31, 2019 April 1, 2018 Adjusted EBITDA $ 65,479 $ 61,414 Less (plus): Depreciation 18,285 13,934 Amortization 7,597 6,585 Share based compensation expense 2,680 3,065 Loss on disposal of property, plant and equipment 2,913 612 Restructuring costs 3,740 — Asset impairment 10,625 — Loss on disposal of subsidiaries 4,605 — Interest expense, net 11,127 8,756 Other income, net of expense (1,130 ) (22 ) Income tax expense 58 6,701 Net income attributable to non-controlling interest 1,190 957 Net income attributable to Masonite $ 3,789 $ 20,826

Other Comprehensive Income an_2

Other Comprehensive Income and Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2019
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 (In thousands) March 31, 2019 April 1, 2018 Accumulated foreign currency translation losses, beginning of period $ (129,930 ) $ (89,824 ) Foreign currency translation gain 12,990 5,774 Income tax benefit (expense) on foreign currency translation gain 12 (22 ) Cumulative translation adjustment recognized upon deconsolidation of subsidiary 1,001 — Less: foreign currency translation gain (loss) attributable to non-controlling interest 216 (243 ) Accumulated foreign currency translation losses, end of period (116,143 ) (83,829 ) Accumulated pension and other post-retirement adjustments, beginning of period (22,989 ) (20,328 ) Amortization of actuarial net losses 404 300 Income tax expense on amortization of actuarial net losses (105 ) (78 ) Accumulated pension and other post-retirement adjustments (22,690 ) (20,106 ) Accumulated other comprehensive loss $ (138,833 ) $ (103,935 ) Other comprehensive income, net of tax $ 14,302 $ 5,974 Less: other comprehensive income (loss) attributable to non-controlling interest 216 (243 ) Other comprehensive income attributable to Masonite $ 14,086 $ 6,217

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	3 Months Ended
	Mar. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Cash and non-cash transactions	Certain cash and non-cash transactions were as follows for the periods indicated: Three Months Ended (In thousands) March 31, 2019 April 1, 2018 Transactions involving cash: Interest paid $ 23,785 $ 17,337 Interest received 672 400 Income taxes paid 1,308 1,583 Income tax refunds — 70 Cash paid for operating lease liabilities 6,290 — Non-cash transactions: Right-of-use assets acquired under operating leases 20,289 —
Schedule of Cash, Cash Equivalents and Restricted Cash	The following reconciles total cash, cash equivalents and restricted cash as of the dates indicated: March 31, 2019 December 30, 2018 Cash and cash equivalents $ 79,642 $ 115,656 Restricted cash 10,985 10,485 Total cash, cash equivalents and restricted cash $ 90,627 $ 126,141

Business Overview and Signifi_3

Business Overview and Significant Accounting Policies (Details) $ in Thousands	Mar. 31, 2019USD ($)Countryfacility	Dec. 31, 2018USD ($)	Dec. 30, 2018USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 126,600		$ 0
Total operating lease liability	$ 134,245
Number of manufacturing locations | facility	67
Number of countries | Country	8
Topic 842 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 108,000
Total operating lease liability		$ 113,900

Acquisitions and Disposition (N

Acquisitions and Disposition (Narrative) (Details) - USD ($) $ in Thousands	Nov. 01, 2018	Jun. 01, 2018	Jan. 29, 2018	Mar. 31, 2019	Apr. 01, 2018
Business Acquisition [Line Items]
Cash consideration, net of cash acquired				$ 219	$ 96,309
Measurement period adjustment				400
BWI
Business Acquisition [Line Items]
Cash consideration, net of cash acquired	$ 22,306
Goodwill acquired during period	3,739
Gross contractual value of acquired trade receivables	$ 9,300
Net sales of acquiree since acquisition date				21,943
Graham & Maiman
Business Acquisition [Line Items]
Cash consideration, net of cash acquired		$ 38,967
Goodwill acquired during period		$ 10,996
Net sales of acquiree since acquisition date				16,656
DW3
Business Acquisition [Line Items]
Cash consideration, net of cash acquired			$ 96,309
Goodwill acquired during period			$ 33,623
Acquired equity interests, percent			100.00%
Gross contractual value of acquired trade receivables			$ 9,100
Net sales of acquiree since acquisition date				$ 19,662	$ 11,198

Acquisitions and Disposition (A

Acquisitions and Disposition (Aggregate Consideration) (Details) - USD ($) $ in Thousands	Nov. 01, 2018	Jun. 01, 2018	Jan. 29, 2018	Mar. 31, 2019	Apr. 01, 2018
Business Acquisition [Line Items]
Cash consideration, net of cash acquired				$ 219	$ 96,309
2018 Acquisitions
Business Acquisition [Line Items]
Accounts receivable				17,805
Inventory				21,885
Property, plant and equipment				29,975
Goodwill				48,358
Intangible assets				68,593
Accounts payable and accrued expenses				(17,660)
Deferred income taxes				(11,546)
Other assets and liabilities, net				172
Cash consideration, net of cash acquired				$ 157,582
BWI
Business Acquisition [Line Items]
Accounts receivable	$ 9,215
Inventory	10,736
Property, plant and equipment	2,222
Goodwill	3,739
Intangible assets	2,970
Accounts payable and accrued expenses	(6,816)
Deferred income taxes	0
Other assets and liabilities, net	240
Cash consideration, net of cash acquired	$ 22,306
Graham & Maiman
Business Acquisition [Line Items]
Accounts receivable		$ 0
Inventory		6,090
Property, plant and equipment		19,557
Goodwill		10,996
Intangible assets		2,750
Accounts payable and accrued expenses		(426)
Deferred income taxes		0
Other assets and liabilities, net		0
Cash consideration, net of cash acquired		$ 38,967
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

Acquisitions and Disposition In

Acquisitions and Disposition Intangible assets acquired (Details) - USD ($) $ in Thousands	Nov. 01, 2018	Jun. 01, 2018	Jan. 29, 2018
BWI
Acquired Finite-Lived Intangible Assets [Line Items]
Customer relationships	$ 1,200
Trademarks and trade names	900
Patents	0
Other	870
Total intangible assets acquired	$ 2,970
BWI | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period for acquired intangible assets	10 years
BWI | Trademarks and trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period for acquired intangible assets	10 years
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
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
	Mar. 31, 2019	Apr. 01, 2018
BWI
Business Acquisition [Line Items]
Net sales	$ 21,943
Net income (loss) attributable to Masonite	78
Graham & Maiman
Business Acquisition [Line Items]
Net sales	16,656
Net income (loss) attributable to Masonite	220
DW3
Business Acquisition [Line Items]
Net sales	19,662	$ 11,198
Net income (loss) attributable to Masonite	2,857	$ 948
2018 Acquisitions
Business Acquisition [Line Items]
Net sales	58,261
Net income (loss) attributable to Masonite	$ 3,155

Acquisitions and Disposition (P

Acquisitions and Disposition (Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Business Acquisition, Pro Forma Information [Line Items]
Net sales	$ 530,311	$ 517,879
Pro forma revenue		550,347
Net income (loss) attributable to Masonite	$ 3,789	20,826
Pro forma net income (loss) attributable Masonite		$ 21,239
Basic earnings per common share attributable to Masonite (in dollars per share)	$ 0.15	$ 0.74
Pro forma earnings per share, basic (in dollars per share)		0.75
Diluted earnings per common share attributable to Masonite (in dollars per share)	$ 0.15	0.73
Pro forma earnings per share, diluted (in dollars per share)		$ 0.74
BWI
Business Acquisition, Pro Forma Information [Line Items]
Net sales		$ 23,060
Net income (loss) attributable to Masonite		130
Graham & Maiman
Business Acquisition, Pro Forma Information [Line Items]
Net sales		15,599
Net income (loss) attributable to Masonite		202
DW3
Business Acquisition, Pro Forma Information [Line Items]
Net sales		4,918
Net income (loss) attributable to Masonite		81
2018 Acquisitions
Business Acquisition, Pro Forma Information [Line Items]
Pro forma elimination of intercompany sales		$ (11,109)

Acquisitions and Disposition Di

Acquisitions and Disposition Dispositions (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Mar. 21, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal of subsidiaries	$ (4,605)	$ 0
Performance Doorset Solutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal of subsidiaries	4,600
Net assets			$ 3,600
Cumulative translation adjustment	$ 1,000

Accounts Receivable (Details)

Accounts Receivable (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019USD ($)Customer	Dec. 30, 2018USD ($)Customer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts | $	$ 1.9	$ 2.1
Accounts Receivable | Customer Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, customers | Customer	10	10
Concentration risk, percent	52.60%	54.60%

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 187,587	$ 189,145
Finished goods	76,326	69,026
Provision for obsolete or aged inventory	(8,414)	(7,764)
Inventories, net	$ 255,499	$ 250,407

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 927,660	$ 934,972
Accumulated depreciation	(329,596)	(325,219)
Property, plant and equipment, net	598,064	609,753
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	29,747	30,653
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	181,124	179,888
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 716,789	$ 724,431

Property, Plant and Equipment_3

Property, Plant and Equipment (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Property, Plant and Equipment [Abstract]
Depreciation	$ 18,285	$ 13,934

Leases Supplemental balance she

Leases Supplemental balance sheet information related to leases (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018
Leases [Abstract]
Operating lease right-of-use assets	$ 126,600	$ 0
Current portion of operating lease liabilities	19,819	0
Long-term operating lease liabilities	114,426	$ 0
Total operating lease liability	$ 134,245
Weighted average remaining lease term (years)	12 years 4 months 24 days
Weighted average discount rate	4.80%

Leases Maturities of operating

Leases Maturities of operating lease liabilities (Details) $ in Thousands	Mar. 31, 2019USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
2019 (remiaing nine months)	$ 19,239
2020	24,103
2021	17,273
2022	13,603
2023	11,030
Thereafter	104,357
Total undiscounted lease payments	189,605
Less imputed interest	(55,360)
Total	$ 134,245

Leases Narrative (Details)

Leases Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Operating leases not yet commenced
Undiscounted commitment for operating leases	$ 15.8
Term of operating leases not yet commenced	10 years
Operating lease cost	$ 9.2
Operating lease expense		$ 7.7

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Schedule of Goodwill) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Goodwill [Roll Forward]
Goodwill, beginning	$ 180,297
Measurement period adjustment	400
Goodwill, ending	182,898
North American Residential
Goodwill [Roll Forward]
Goodwill, beginning	6,189
Measurement period adjustment	390
Foreign exchange fluctuations	7
Goodwill, ending	6,586
Europe
Goodwill [Roll Forward]
Goodwill, beginning	63,220
Measurement period adjustment	0
Foreign exchange fluctuations	2,129
Goodwill, ending	65,349
Architectural
Goodwill [Roll Forward]
Goodwill, beginning	110,888
Measurement period adjustment	0
Foreign exchange fluctuations	75
Goodwill, ending	110,963
Operating Segments
Goodwill [Roll Forward]
Goodwill, beginning	180,297
Measurement period adjustment	390
Foreign exchange fluctuations	2,211
Goodwill, ending	$ 182,898

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Cost and Accumulated Amortized Values) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 277,508	$ 272,415
Finite-lived intangible assets, accumulated amortization	(144,835)	(136,401)
Finite-lived intangible assets, net	132,673	136,014
Total intangible assets, gross	353,782	348,446
Total intangible assets, net	208,947	212,045
Customer Relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	177,020	173,637
Finite-lived intangible assets, accumulated amortization	(87,129)	(81,220)
Finite-lived intangible assets, net	89,891	92,417
Patents
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	31,668	31,363
Finite-lived intangible assets, accumulated amortization	(22,429)	(21,840)
Finite-lived intangible assets, net	9,239	9,523
Software
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	33,042	32,660
Finite-lived intangible assets, accumulated amortization	(30,162)	(29,296)
Finite-lived intangible assets, net	2,880	3,364
Trademarks and trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	34,803	33,784
Finite-lived intangible assets, accumulated amortization	(4,906)	(3,948)
Finite-lived intangible assets, net	29,897	29,836
Other
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	975	971
Finite-lived intangible assets, accumulated amortization	(209)	(97)
Finite-lived intangible assets, net	766	874
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	76,274	76,031
Indefinite-lived intangible assets, net	$ 76,274	$ 76,031

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Measurement period adjustment	$ 0.4
Amortization of intangible assets	$ 7.2	$ 6.1

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets (Estimated Future Amortization of Intangible Assets) (Details) $ in Thousands	Mar. 31, 2019USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019 (remaining nine months)	$ 21,465
2020	22,735
2021	19,118
2022	15,656
2023	$ 14,158

Accrued Expenses (Details)

Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018
Accrued Expenses [Abstract]
Accrued payroll	$ 42,493	$ 39,823
Accrued rebates	31,703	36,711
Current portion of operating lease liabilities	19,819	0
Accrued interest	2,365	14,570
Other accruals	51,542	56,241
Total accrued expenses	$ 147,922	$ 147,345

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018	Aug. 27, 2018	Sep. 27, 2017	Mar. 23, 2015
Debt Instrument [Line Items]
Other long-term debt	$ 1,132	$ 1,108
Total long-term debt	796,586	796,398
Senior Notes
Debt Instrument [Line Items]
Debt issuance costs	(8,009)	(8,394)
Senior Notes | Senior Notes Due 2023
Debt Instrument [Line Items]
Long-term debt	500,000	500,000
Unamortized premium on 2023 Notes	3,463	3,684		$ 6,000
Debt issuance costs				$ (2,100)	$ (7,100)
Senior Notes | Senior Notes Due 2026
Debt Instrument [Line Items]
Long-term debt	$ 300,000	$ 300,000
Debt issuance costs			$ (4,300)

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details) - USD ($)	Sep. 12, 2018	Aug. 27, 2018	Mar. 23, 2015	Mar. 31, 2019	Apr. 01, 2018	Dec. 31, 2017	Jan. 03, 2016	Jan. 31, 2019	Dec. 30, 2018	Sep. 27, 2017	Apr. 09, 2015
Debt Instrument [Line Items]
Debt issued, percent above par (percent)			100.00%
Senior Notes
Debt Instrument [Line Items]
Interest expense				$ 11,300,000	$ 8,700,000
Debt issuance costs				$ (8,009,000)					$ (8,394,000)
Senior Notes | Senior Notes Due 2026
Debt Instrument [Line Items]
Aggregate principal		$ 300,000,000
Interest rate stated percentage				5.75%
Proceeds from issuance of long-term debt		295,700,000
Debt issuance costs		$ (4,300,000)
Senior Notes | Senior Notes Due 2026 | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Redemption price, percentage				101.00%
Senior Notes | Senior Notes Due 2023
Debt Instrument [Line Items]
Aggregate principal			$ 475,000,000							$ 150,000,000
Interest rate stated percentage				5.625%
Debt issued, percent above par (percent)										104.00%
Unamortized premium on 2023 Notes				$ 3,463,000					3,684,000	$ 6,000,000
Write off of unamortized premium				1,000,000
Write off of unamortized deferred issuance costs				1,100,000
Proceeds from issuance of long-term debt						$ 153,900,000	$ 467,900,000
Debt issuance costs			$ (7,100,000)							$ (2,100,000)
Loss on extinguishment of debt				5,400,000
Extinguishment of debt	$ 125,000,000
Premium paid on extinguishment of debt				$ 5,300,000
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 2024
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 250,000,000
Maximum pro forma secured leverage ratio				4.5
Revolving credit facilities				$ 0					$ 0
Revolving Credit Facility | ABL Facility 2020
Debt Instrument [Line Items]
Maximum borrowing capacity											$ 150,000,000
Minimum | Revolving Credit Facility | ABL Facility 2024
Debt Instrument [Line Items]
Unutilized commitment fee percentage				0.25%
Minimum | Revolving Credit Facility | ABL Facility 2024 | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate				0.25%
Minimum | Revolving Credit Facility | ABL Facility 2024 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate				1.25%
Maximum | Revolving Credit Facility | ABL Facility 2024 | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Maximum | Revolving Credit Facility | ABL Facility 2024 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate				1.50%

Share Based Compensation Plan_2

Share Based Compensation Plans Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Jul. 12, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 2,680	$ 3,065
Share based compensation unrecognized	$ 22,100
Weighted average remaining requisite service period	2 years 2 months 12 days
Deferred compensation liability	$ 6,100
Deferred compensation asset	$ 6,200
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	742,651
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	$ 1,100	$ 700
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 4 months 24 days
Units vested	116,919
Fair value of shares vested	$ 7,200
Service Requirement | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	75.00%
Service and Performance Requirements | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%

Share Based Compensation Plan_3

Share Based Compensation Plans (SARs) (Details) - Stock Appreciation Rights (SARs) - USD ($) $ / shares in Units, $ in Thousands	Mar. 31, 2019	Dec. 30, 2018	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning of period, shares			514,313
Granted, shares			54,585
Exercised, shares			(29,288)
Outstanding, end of period, shares	539,610	514,313	539,610
Exercisable, shares	422,248		422,248
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			$ 7,254
Exercised, aggregate intrinsic value			1,060
Outstanding, end period, aggregate intrinsic value	$ 7,632	$ 7,254	7,632
Exercisable, aggregate intrinsic value	$ 7,632		$ 7,632
Outstanding, beginning of period, weighted average remaining contractual term	5 years 2 months 12 days	4 years 7 months 6 days
Outstanding, end of period, weighted average remaining contractual term	5 years 2 months 12 days	4 years 7 months 6 days
Exercisable, weighted average remaining contractual term	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, beginning of period, weighted average exercise price			$ 39.01
Granted, weighted average exercise price			57.52
Exercised, weighted average exercise price			18.69
Outstanding, end of period, weighted average exercise price	$ 41.99	$ 39.01	41.99
Exercisable, weighted average exercise price	$ 36.10		$ 36.10

Share Based Compensation Plan_4

Share Based Compensation Plans (Weighted Average Grant Date Assumptions) (Details) - Stock Appreciation Rights (SARs)	3 Months Ended
	Mar. 31, 2019$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option value (model conclusion)	$ 15.82
Risk-free rate	2.50%
Expected dividend yield	0.00%
Expected volatility	22.00%
Expected term (in years)	6 years

Share Based Compensation Plan_5

Share Based Compensation Plans (RSUs) (Details)	3 Months Ended
	Mar. 31, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award Equity Instruments Other Than Options Vested and Undelivered Performance adjustment Weighted Average Grant Date Fair Value | $ / shares	$ 57.51
Restricted Stock Units (RSUs)
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)	429,027,000
Granted (shares)	245,468,000
Performance adjustment (shares)	21,953,000
Delivered (shares)	(97,858,000)
Withheld to cover (shares)	(19,061,000)
Forfeited (shares)	(9,691,000)
Outstanding, end of period (shares)	525,932,000
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) | $ / shares	$ 66.03
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares	56.95
Outstanding, end of period (weighted average grant date fair value) | $ / shares	$ 63.13

Restructuring Costs (Restructur

Restructuring Costs (Restructuring Costs by Plan) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 3,740	$ 0
Cumulative amount incurred to date	17,064
2019 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs	2,788
Cumulative amount incurred to date	2,788
2019 Plan | North American Residential
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,459
2019 Plan | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring costs	331
2019 Plan | Architectural
Restructuring Cost and Reserve [Line Items]
Restructuring costs	604
2019 Plan | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs	394
2018 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs	952
Cumulative amount incurred to date	2,576
2018 Plan | North American Residential
Restructuring Cost and Reserve [Line Items]
Restructuring costs	421
2018 Plan | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring costs	531
2018 Plan | Architectural
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0
2018 Plan | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0
2016 Plan
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	3,707
2014 Plan
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	7,993
Operating Segments | North American Residential
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,880
Cumulative amount incurred to date	2,155
Operating Segments | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring costs	862
Cumulative amount incurred to date	2,211
Operating Segments | Architectural
Restructuring Cost and Reserve [Line Items]
Restructuring costs	604
Cumulative amount incurred to date	4,311
Operating Segments | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs	394
Cumulative amount incurred to date	8,387
Operating Segments | 2019 Plan | North American Residential
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	1,459
Operating Segments | 2019 Plan | Europe
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	331
Operating Segments | 2019 Plan | Architectural
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	604
Operating Segments | 2019 Plan | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	394
Operating Segments | 2018 Plan | North American Residential
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	696
Operating Segments | 2018 Plan | Europe
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	1,880
Operating Segments | 2018 Plan | Architectural
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0
Operating Segments | 2018 Plan | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0
Operating Segments | 2016 Plan | North American Residential
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0
Operating Segments | 2016 Plan | Europe
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0
Operating Segments | 2016 Plan | Architectural
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	3,707
Operating Segments | 2016 Plan | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0
Operating Segments | 2014 Plan | North American Residential
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0
Operating Segments | 2014 Plan | Europe
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0
Operating Segments | 2014 Plan | Architectural
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	0
Operating Segments | 2014 Plan | Corporate & Other
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date	$ 7,993

Restructuring Costs (Details)

Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 654	$ 284
Restructuring charges	3,740	0
Cash payments	(1,598)	(133)
Restructuring reserve, ending balance	2,796	151
Severance
Restructuring Reserve [Roll Forward]
Restructuring charges	3,753
Facility Closing
Restructuring Reserve [Roll Forward]
Restructuring charges	(13)
2019 Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0
Restructuring charges	2,788
Cash payments	(1,035)
Restructuring reserve, ending balance	1,753
2019 Plan | Severance
Restructuring Reserve [Roll Forward]
Restructuring charges	2,770
2019 Plan | Facility Closing
Restructuring Reserve [Roll Forward]
Restructuring charges	18
2018 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	2,000
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	596
Restructuring charges	952
Cash payments	(546)
Restructuring reserve, ending balance	1,002
2018 Plan | Severance
Restructuring Reserve [Roll Forward]
Restructuring charges	983
2018 Plan | Facility Closing
Restructuring Reserve [Roll Forward]
Restructuring charges	(31)
2016 Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance		90
Cash payments		(90)
Restructuring reserve, ending balance		0
Other
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	58	194
Cash payments	(17)	(43)
Restructuring reserve, ending balance	41	$ 151
Other | Severance
Restructuring Reserve [Roll Forward]
Restructuring charges	0
Other | Facility Closing
Restructuring Reserve [Roll Forward]
Restructuring charges	0
Minimum | 2019 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	10,000
Maximum | 2019 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	$ 12,000

Asset Impairment (Details)

Asset Impairment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment	$ 10,625	$ 0
Book value of asset group	21,900
Level 3 | Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of asset group based on estimated discounted future cash flows, including salvage values or market values	$ 11,300

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
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	$ 0.2

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Earnings Per Share [Abstract]
Net income attributable to Masonite	$ 3,789	$ 20,826
Shares used in computing basic earnings per share	25,574,910	28,189,790
Effect of dilutive securities:
Incremental shares issuable under share compensation plans	376,574	482,472
Shares used in computing diluted earnings per share	25,951,484	28,672,262
Basic earnings per common share attributable to Masonite (in dollars per share)	$ 0.15	$ 0.74
Diluted earnings per common share attributable to Masonite (in dollars per share)	$ 0.15	$ 0.73
Anti-dilutive instruments excluded from diluted earnings per common share	235,650	51,129

Segment Information (Geographic

Segment Information (Geographic Segments Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 530,311	$ 517,879
Adjusted EBITDA	65,479	61,414
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	534,622	524,282
Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	(4,311)	(6,403)
North American Residential
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	353,725	359,680
Adjusted EBITDA	53,621	50,398
North American Residential | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	354,802	360,542
North American Residential | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	(1,077)	(862)
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	84,267	87,104
Adjusted EBITDA	9,997	9,930
Europe | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	84,739	87,752
Europe | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	(472)	(648)
Architectural
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	85,591	66,671
Adjusted EBITDA	7,614	7,660
Architectural | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	88,353	71,564
Architectural | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	(2,762)	(4,893)
Corporate & Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6,728	4,424
Adjusted EBITDA	(5,753)	(6,574)
Corporate & Other | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6,728	4,424
Corporate & Other | Intersegment Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 0	$ 0

Segment Information (Reconcilia

Segment Information (Reconciliation of Consolidated Adjusted EBITDA to Net Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Segment Reporting [Abstract]
Adjusted EBITDA	$ 65,479	$ 61,414
Depreciation	18,285	13,934
Amortization	7,597	6,585
Share based compensation expense	2,680	3,065
Loss on disposal of property, plant and equipment	2,913	612
Restructuring costs	3,740	0
Asset impairment	10,625	0
Loss on disposal of subsidiaries	4,605	0
Interest expense, net	11,127	8,756
Other income, net of expense	(1,130)	(22)
Income tax expense	58	6,701
Net income attributable to non-controlling interest	1,190	957
Net income attributable to Masonite	$ 3,789	$ 20,826

Other Comprehensive Income an_3

Other Comprehensive Income and Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Dec. 30, 2018
Accumulated Foreign Currency Translation Gains (Losses) [Roll Forward]
Accumulated foreign currency translation gains (losses), beginning of period	$ (129,930)	$ (89,824)
Foreign currency translation gain (loss)	12,990	5,774
Income tax benefit (expense) on foreign currency translation gain (loss)	12	(22)
Cumulative translation adjustment recognized upon deconsolidation of subsidiary	(1,001)	0
Less: foreign currency translation gain (loss) attributable to non-controlling interest	216	(243)
Accumulated foreign currency translation gains (losses), end of period	(116,143)	(83,829)
Accumulated Amortization of Actuarial Net Losses [Roll Forward]
Accumulated pension and other post-retirement adjustments, beginning of period	(22,989)	(20,328)
Amortization of actuarial net losses	404	300
Income tax expense on amortization of actuarial net losses	(105)	(78)
Accumulated pension and other post-retirement adjustments	(22,690)	(20,106)
Accumulated other comprehensive loss	(138,833)	(103,935)	$ (152,919)
Other comprehensive income, net of tax	14,302	5,974
Less: other comprehensive income (loss) attributable to non-controlling interest	216	(243)
Other comprehensive income attributable to Masonite	$ 14,086	$ 6,217

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Dec. 30, 2018
Supplemental Cash Flow Elements [Abstract]
Property, Plant and Equipment, Additions	$ 3,500		$ 8,700
Transactions involving cash:
Interest paid	23,785	$ 17,337
Interest received	672	400
Income taxes paid	1,308	1,583
Income tax refunds	0	70
Cash paid for operating lease liabilities	6,290	0
Non-cash transactions:
Right-of-use assets acquired in under operating leases	$ 20,289	$ 0

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information Cash, cash equivalents and restricted cash (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018	Apr. 01, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 79,642	$ 115,656
Restricted cash	10,985	10,485
Total cash, cash equivalents and restricted cash	$ 90,627	$ 126,141	$ 48,871	$ 188,564

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Details) - Senior Notes - Fair Value, Inputs, Level 2 - USD ($) $ in Millions	Mar. 31, 2019	Dec. 30, 2018
Senior Notes Due 2026 | Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of senior notes	$ 303.7	$ 282.6
Senior Notes Due 2026 | Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of senior notes	296	295.8
Senior Notes Due 2023 | Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of senior notes	511	484.9
Senior Notes Due 2023 | Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of senior notes	$ 499.5	$ 499.5