PGT Innovations (PGTI) 10-Q 5 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Oct. 03, 2020	Oct. 31, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 3, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Trading Symbol	PGTI
Entity Registrant Name	PGT Innovations, Inc.
Entity Central Index Key	0001354327
Current Fiscal Year End Date	--01-02
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity File Number	001-37971
Entity Tax Identification Number	20-0634715
Entity Address, Address Line One	1070 Technology Drive
Entity Address, City or Town	North Venice
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	34275
City Area Code	941
Local Phone Number	480-1600
Entity Common Stock, Shares Outstanding		58,962,776
Title of 12(b) Security	Common stock, par value $0.01 per share
Security Exchange Name	NYSE
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Income Statement [Abstract]
Net sales	$ 238,033	$ 197,823	$ 661,020	$ 570,130
Cost of sales	151,097	127,828	418,494	365,925
Gross profit	86,936	69,995	242,526	204,205
Selling, general and administrative expenses	56,659	44,564	164,848	132,604
Impairment of trade name			8,000
Restructuring costs and charges	321		4,227
Income from operations	29,956	25,431	65,451	71,601
Interest expense, net	6,954	6,452	20,979	19,922
Income before income taxes	23,002	18,979	44,472	51,679
Income tax expense	5,680	3,873	9,351	11,271
Net income	$ 17,322	$ 15,106	$ 35,121	$ 40,408
Net income per common share:
Basic	$ 0.29	$ 0.26	$ 0.60	$ 0.69
Diluted	$ 0.29	$ 0.26	$ 0.59	$ 0.68
Weighted average shares outstanding:
Basic	58,963	58,433	58,858	58,320
Diluted	59,442	59,142	59,291	59,192

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 17,322	$ 15,106	$ 35,121	$ 40,408
Other comprehensive income before tax:
Change in fair value of derivatives	1,563	(1,136)	(2,120)	(2,083)
Reclassification to earnings	532	1,532	2,737	3,670
Other comprehensive income before tax	2,095	396	617	1,587
Income tax expense related to other comprehensive income	524	102	154	406
Other comprehensive income, net of tax	1,571	294	463	1,181
Comprehensive income	$ 18,893	$ 15,400	$ 35,584	$ 41,589

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 28, 2019
Current assets:
Cash and cash equivalents	$ 99,344	$ 97,243
Accounts receivable, net	99,062	68,091
Inventories	54,707	43,851
Contract assets, net	24,050	10,547
Prepaid expenses	10,064	3,362
Other current assets	10,549	10,516
Total current assets	297,776	233,610
Property, plant and equipment, net	132,710	128,199
Operating lease right-of-use asset, net	38,912	26,390
Intangible assets, net	261,208	255,962
Goodwill	328,425	277,600
Other assets, net	1,103	972
Total assets	1,060,134	922,733
Current liabilities:
Accounts payable and accrued liabilities	96,422	51,394
Current portion of operating lease liability	6,396	4,703
Total current liabilities	102,818	56,097
Long-term debt	411,817	368,971
Operating lease liability, less current portion	35,513	24,040
Deferred income taxes	26,099	27,945
Other liabilities	12,533	14,132
Total liabilities	588,780	491,185
Shareholders' equity:
Preferred stock; par value $.01 per share; 10,000 shares authorized; no shares outstanding
Common stock; par value $.01 per share; 200,000 shares authorized; 62,495 and 61,921 shares issued and 58,963 and 58,505 shares outstanding at October 3, 2020 and December 28, 2019, respectively	625	619
Additional paid-in-capital	418,904	414,688
Accumulated other comprehensive income (loss)	225	(238)
Retained earnings	69,909	34,788
Shareholders' equity	489,663	449,857
Less: Treasury stock at cost	(18,309)	(18,309)
Total shareholders' equity	471,354	431,548
Total liabilities and shareholders' equity	$ 1,060,134	$ 922,733

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Oct. 03, 2020	Dec. 28, 2019
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, Shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, Shares authorized	200,000,000	200,000,000
Common stock, shares issued	62,495,000	61,921,000
Common stock, shares outstanding	58,963,000	58,505,000

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019
Cash flows from operating activities:
Net income	$ 35,121	$ 40,408
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	17,561	13,854
Amortization	14,124	11,959
Impairment of trade name	8,000
Non-cash portion of restructuring costs and charges	2,442
Provision for allowance for doubtful accounts	1,057	1,659
Stock-based compensation	4,369	3,246
Amortization of deferred financing costs, debt discount and premium	925	1,303
Gains on sales of assets	(125)	(3)
Change in operating assets and liabilities (net of effects of acquisition):
Accounts receivable	(20,532)	(2,682)
Inventories	(9,060)	(2,900)
Contract assets, net, prepaid expenses, other current and other assets	(9,867)	(7,720)
Accounts payable, accrued and other liabilities	21,406	(4,852)
Net cash provided by operating activities	65,421	54,272
Cash flows from investing activities:
Purchases of property, plant and equipment	(15,378)	(20,252)
Business acquisition	(90,368)
Proceeds from sales of assets	651	43
Net cash used in investing activities	(105,095)	(20,209)
Cash flows from financing activities:
Proceeds from issuance of senior notes	53,188
Payments of long-term debt	(10,000)	(163)
Payments of financing costs	(1,266)
Purchases of treasury stock under Board of Director approved plan		(5,550)
Purchases of common stock relating to tax withholdings on employee equity awards	(815)	(505)
Proceeds from exercise of stock options	549	1,262
Proceeds from issuance of common stock under employee stock purchase plan (ESPP)	119	46
Net cash provided by (used in) financing activities	41,775	(4,910)
Net increase in cash and cash equivalents	2,101	29,153
Cash and cash equivalents at beginning of period	97,243	52,650
Cash and cash equivalents at end of period	99,344	81,803
Non-cash activity:
Establish right-of-use asset	17,917	31,257
Establish operating lease liability	(17,917)	(33,686)
Property, plant and equipment additions in accounts payable	$ 326	$ 289

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings/(Accumulated Deficit) [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 29, 2018	$ 385,544	$ 607	$ 409,661	$ (3,065)	$ (8,900)	$ (12,759)
Beginning Balance, Shares at Dec. 29, 2018		58,081,540
Vesting of restricted stock, Shares		164,226
Grants of restricted stock		$ 5	(5)
Purchases of treasury stock	(6,055)					(6,055)
Purchases of treasury stock, Shares		(428,059)
Retirement of treasury stock			(505)			505
Stock-based compensation	3,246		3,246
Exercise of stock options	1,262	$ 5	1,257
Exercise of stock options, Shares		532,931
Common stock issued under ESPP	46		46
Common stock issued under ESPP, Shares		3,165
Net income	40,408				40,408
Other comprehensive income	1,181			1,181
Ending Balance at Sep. 28, 2019	425,632	$ 617	413,700	(1,884)	31,508	(18,309)
Ending Balance, Shares at Sep. 28, 2019		58,353,803
Beginning Balance at Jun. 29, 2019	414,375	$ 615	412,295	(2,178)	16,402	(12,759)
Beginning Balance, Shares at Jun. 29, 2019		58,535,669
Purchases of treasury stock	(5,550)					(5,550)
Purchases of treasury stock, Shares		(393,819)
Stock-based compensation	970		970
Exercise of stock options	422	$ 2	420
Exercise of stock options, Shares		210,931
Common stock issued under ESPP	15		15
Common stock issued under ESPP, Shares		1,022
Net income	15,106				15,106
Other comprehensive income	294			294
Ending Balance at Sep. 28, 2019	425,632	$ 617	413,700	(1,884)	31,508	(18,309)
Ending Balance, Shares at Sep. 28, 2019		58,353,803
Beginning Balance at Dec. 28, 2019	431,548	$ 619	414,688	(238)	34,788	(18,309)
Beginning Balance, Shares at Dec. 28, 2019		58,504,734
Vesting of restricted stock, Shares		219,977
Grants of restricted stock		$ 6	(6)
Forfeitures of restricted stock		$ (2)	2
Purchases of treasury stock	(815)					(815)
Purchases of treasury stock, Shares		(51,479)
Retirement of treasury stock		$ (1)	(814)			815
Stock-based compensation	4,369		4,369
Exercise of stock options	$ 549	$ 3	546
Exercise of stock options, Shares	274,353	274,353
Common stock issued under ESPP	$ 119		119
Common stock issued under ESPP, Shares		15,191
Net income	35,121				35,121
Other comprehensive income	463			463
Ending Balance at Oct. 03, 2020	471,354	$ 625	418,904	225	69,909	(18,309)
Ending Balance, Shares at Oct. 03, 2020		58,962,776
Beginning Balance at Jul. 04, 2020	451,010	$ 626	417,452	(1,346)	52,587	(18,309)
Beginning Balance, Shares at Jul. 04, 2020		58,962,776
Forfeitures of restricted stock		$ (1)	1
Stock-based compensation	$ 1,451		1,451
Exercise of stock options, Shares	0
Net income	$ 17,322				17,322
Other comprehensive income	1,571			1,571
Ending Balance at Oct. 03, 2020	$ 471,354	$ 625	$ 418,904	$ 225	$ 69,909	$ (18,309)
Ending Balance, Shares at Oct. 03, 2020		58,962,776

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Statement Of Stockholders Equity [Abstract]
Income tax (benefit) expense related to components of other comprehensive income (loss)	$ 524	$ 102	$ 154	$ 406

Description of Business and Bas

Description of Business and Basis of Presentation	9 Months Ended
	Oct. 03, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Description of Business and Basis of Presentation	NOTE 1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION About PGT Innovations, Inc. The accompanying unaudited condensed consolidated financial statements include the accounts of PGT Innovations, Inc. and its direct and indirect wholly-owned subsidiaries, including, PGT Industries, Inc., CGI Window and Door Holdings, Inc. (“CGI”), CGI Commercial, Inc. (“CGIC”), WinDoor, Incorporated, Coyote Acquisition Co., WWS Acquisition LLC (formerly known as GEF WW Parent LLC) (“WWS”), and with their acquisition by PGT Innovations, Inc. effective on February 1, 2020, NewSouth Window Solutions LLC, and NewSouth Window Solutions of Orlando LLC (“NewSouth”) (collectively, the “Company”), after elimination of intercompany accounts and transactions. PGT Innovations, Inc. (“PGTI,” “we,” or the “Company”), formerly named PGT, Inc., manufactures and supplies premium windows and doors. Our highly-engineered products can withstand some of the toughest weather conditions on earth and unify indoor/outdoor living spaces. We are also the nation’s largest manufacturer of impact-resistant windows and doors. Our family of brands include CGI®, PGT® Custom Windows & Doors, WinDoor®, Western Window Systems®, CGI Commercial®, Eze-Breeze® and NewSouth Window Solutions®. Our products other than NewSouth products are sold through an authorized dealer and distributor network. Our NewSouth products are sold directly to the end-user consumer through store-front locations throughout Florida, and through direct-to-homeowner door-to-door sales. We are also opening NewSouth store-front locations in other states as part of our strategy of expanding NewSouth’s geographic presence, including new locations opened in 2020 in Charleston, South Carolina, Pensacola, Florida, and Houston, Texas. The majority of our sales are to customers in the state of Florida, which further increased with our acquisition of NewSouth, but we sell products to customers in many states, including the western United States through WWS. We also have sales in the Caribbean, Canada, and in South and Central America. See Note 6 for a discussion of the acquisition of NewSouth. We were incorporated in the state of Delaware on December 16, 2003, as JLL Window Holdings, Inc., with primary operations in North Venice, Florida. On February 15, 2006, our Company was renamed PGT, Inc. On December 14, 2016, we announced that we changed our name to PGT Innovations, Inc. and, effective on December 28, 2016, the listing of our common stock was transferred to the New York Stock Exchange (“NYSE”) from the NASDAQ Global Market (NASDAQ), and began trading on the NYSE under its existing ticker symbol of “PGTI”. Subsequent to our Florida facilities consolidation, executed during the second quarter of 2020, which included our exit from our Orlando, Florida manufacturing facility, we have four manufacturing operations in Florida, and one in Arizona. Our manufacturing facilities in Florida include one in North Venice, two in the greater Miami area, and one in Tampa with the acquisition of NewSouth. Pursuant to our Florida facilities consolidation, we relocated the manufacturing operations formerly in Orlando to our North Venice and Tampa facilities. Our Arizona operations are in Phoenix. Additionally, we have two glass tempering and laminating plants and one insulation glass plant, all located in North Venice. See Note 17 for a discussion of restructuring costs and charges relating to the Florida facility consolidation. All references to PGTI or our Company apply to the consolidated financial statements of PGT Innovations, Inc. unless otherwise noted. COVID-19 Pandemic In March 2020, the World Health Organization declared the outbreak of COVID-19 (“COVID-19 pandemic”, or “Pandemic”), which continues to spread throughout the U.S. and the world. The full impact from the rapidly changing U.S. and global market and economic conditions due to the Pandemic is uncertain, but we have seen disruptions to the businesses of certain of our customers and suppliers due to the Pandemic, which in turn have impacted, and are likely to continue to impact in the future, our business and consolidated results of operations and financial condition. While we have not incurred significant disruptions to our manufacturing or supply chain thus far from the Pandemic, we are unable to accurately predict the impact the Pandemic and the challenges it has created for the U.S. and global economies, will have on our financial performance and operations going forward due to numerous uncertainties, including the severity of the disease, the duration of the outbreak, actions that may be taken by governmental authorities to attempt to control the Pandemic, the impact to our customers’ and suppliers’ businesses and other factors identified in Part II, Item 1A “Risk Factors” in this Form 10-Q. We will continue to evaluate the nature and extent of the impact of the Pandemic to our business, consolidated results of operations, and financial condition. Basis of Presentation These condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and do not include all the information and footnotes required by United States Generally Accepted Accounting Principles (“GAAP”) for complete financial statements. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the interim period are not necessarily indicative of the results that may be expected for the remainder of the current year or for any future periods. The Company’s fiscal third quarter in 2020 ended October 3, 2020, and our fiscal third quarter in 2019 ended September 28, 2019, both consisted of 13 weeks. The Company’s fiscal first nine months in 2020 ended October 3, 2020 consisted of 40 weeks, whereas our fiscal first nine months in 2019 ended September 28, 2019, consisted of 39 weeks. The condensed consolidated balance sheet as of December 28, 2019, is derived from the audited consolidated financial statements, but does not include all disclosures required by GAAP. The condensed consolidated balance sheet as of December 28, 2019, and the unaudited condensed consolidated financial statements as of and for the periods ended October 3, 2020, and September 28, 2019, should be read in conjunction with the more detailed audited consolidated financial statements for the year ended December 28, 2019, included in the Company’s most recent Annual Report on Form 10-K. The accounting policies used in the preparation of these unaudited condensed consolidated financial statements are consistent with the accounting policies described in the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could materially differ from those estimates. As described above, the extent to which the COVID-19 pandemic and resulting measures that may be taken by the Company and/or its customers or suppliers and/or by governmental entities will impact the Company's business will depend on future developments, which are highly uncertain and cannot be precisely predicted at this time. Management's estimates and assumptions are highly dependent on estimates of future developments and may change significantly in the future due to unforeseen direct and indirect impacts of the COVID-19 pandemic. We have two reportable segments: the Southeast segment, and the Western segment. The Southeast reporting segment, which is also an operating segment, is composed of sales from our facilities in Florida. The Western reporting segment, also an operating segment, is composed of sales from our facility in Arizona. Beginning in 2020, sales into certain states have been reclassified between segments. As such, segment sales amounts for the three and nine months ended September 28, 2019, along with the related income from operations, have been revised to conform to the 2020 presentation. See Note 16 for segment disclosures. Recently Adopted Accounting Pronouncements Fair Value Measurement Disclosures In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820) - Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement”. The new guidance modifies disclosure requirements related to fair value measurement. The amendments in this ASU were effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Implementation on a prospective or retrospective basis varies by specific disclosure requirement. The Company adopted this guidance in the first quarter of 2020, and it did not have any impact on our fair value disclosures. Financial Instruments – Credit Losses In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 requires entities to measure all expected credit losses for most financial assets held at the reporting date based on an expected loss model which includes historical experience, current conditions, and reasonable and supportable forecasts. Entities will now use forward-looking information to better form their credit loss estimates. ASU 2016-13 also requires enhanced disclosures to help financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an entity’s portfolio. Subsequently, in November 2018, the FASB issued ASU 2018-19, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses”. ASU 2018-19 clarifies the codification and corrects unintended application of the guidance. ASU’s 2016-13 and 2018-19 were effective for us for our 2020 fiscal year. The adoption of this guidance did not have any impact on our consolidated financial statements. In the ordinary course of business, we extend credit to qualified dealers and distributors, generally on a non-collateralized basis. The Company maintains an allowance for doubtful accounts which is based on management’s assessments of the amount which may become uncollectible in the future and is determined through consideration of our write-off history, specific identification of uncollectible accounts based in part on the customer’s past due balance (based on contractual terms), and consideration of prevailing economic and industry conditions, and may include anticipated unfavorable impacts of the COVID-19 pandemic on the businesses of our customers, such as dealers and distributors. Uncollectible accounts are written off after repeated attempts to collect from the customer have been unsuccessful. As of October 3, 2020, and December 28, 2019, the allowance for doubtful accounts was million and million, respectively. Recently Issued Accounting Pronouncements Reference Rate Reform In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” ASU 2020-04 is intended to provide temporary optional expedients and exceptions to U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (LIBOR) and other interbank offered rates to alternative reference rates. The transition to new reference interest rates will require certain contracts to be modified and ASU 2020-04 is intended to mitigate the effects of this transition. This new guidance was effective upon issuance of this ASU for contract modifications and hedging relationships on a prospective basis. Accounting for Income Taxes In December 2019, the FASB issued ASU 2019-12, “Simplifying the Accounting for Income Taxes.” ASU 2019-12 simplifies the accounting for income taxes by removing certain exceptions to the general principles and also clarifies and amends existing guidance. This standard is effective beginning January 1, 2021, with early adoption permitted. We do not expect this standard to have a material impact on our consolidated financial statements.

Revenue Recognition and Contrac

Revenue Recognition and Contracts with Customers	9 Months Ended
	Oct. 03, 2020
Revenue From Contract With Customer [Abstract]
Revenue Recognition and Contracts with Customers	NOTE 2. REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS Revenue Recognition Accounting Policy The Company primarily manufactures fully customized windows and doors based on design specifications, measurements, colors, finishes, framing materials, glass-types, and other options selected by the customer at the point in time an order is received. The Company has an enforceable right to payment at the time an order is received and accepted at the agreed-upon sales prices contained in our agreements with our customers for all manufacturing efforts expended on behalf of its customers. Due to the customized build-to-order nature of these products, the Company’s assessment is that the substantial portion of its finished goods and certain unused glass components have no alternative use, and that control of these products and components passes to the customer over time during the manufacturing of the products in an order, or upon our receipt of certain pre-cut glass components from our supplier attributed to specific customer orders. Based on these factors, the Company recognizes a substantial portion of revenue over time during the manufacturing process once customization begins, and for certain unused glass components on hand, at the end of a reporting period. Revenue on work-in-process at the end of a reporting period is recognized in proportion to costs incurred to total estimated cost of the product being manufactured. Except for the Western segment’s volume products, discussed in the section titled Disaggregation of Revenue from Contracts with Customers below, revenue recognized at a point in time is immaterial. Disaggregation of Revenue from Contracts with Customers As discussed in Note 1, we have two reportable segments: our Southeast segment and our Western segment. See Note 16 for more information. The following tables provide information about our net sales by reporting segment, product category and market for the three and nine months ended October 3, 2020, and September 28, 2019 (dollars in millions): Three Months Ended Nine Months Ended October 3, September 28, October 3, September 28, Disaggregation of revenue (in millions) : 2020 2019 2020 2019 Reporting segment: Southeast $ 203.7 $ 161.9 $ 560.2 $ 465.1 Western 34.3 35.9 100.8 105.0 Total net sales $ 238.0 $ 197.8 $ 661.0 $ 570.1 Product category: Impact-resistant window and door products $ 173.3 $ 138.4 $ 471.0 $ 395.7 Non-impact window and door products 64.7 59.4 190.0 174.4 Total net sales $ 238.0 $ 197.8 $ 661.0 $ 570.1 Market: New construction $ 102.0 $ 95.6 $ 305.1 $ 281.5 Repair and remodel 136.0 102.2 355.9 288.6 Total net sales $ 238.0 $ 197.8 $ 661.0 $ 570.1 The Company’s Western segment includes both custom and volume products. This segment’s volume products are not made-to-order and are of standardized sizes and design specifications. Therefore, the Company’s assessment is that the Western segment’s volume products have alternative uses, and that control of these products passes to the customer at a point in time, which is typically when the product has been delivered to the customer. For the three months ended October 3, 2020, and September 28, 2019, the Western segment’s net sales of its volume products were $12.6 million and $13.8 million, respectively. For the nine months ended October 3, 2020, and September 28, 2019, the Western segment’s net sales of its volume products were $39.0 million and $40.6 million, respectively. Contract Balances Contract assets represent sales recognized in excess of billings related to finished goods not yet shipped and certain unused glass components not yet placed into the production process for which revenue is recognized over time as noted above. Contract liabilities relate to customer deposits at the end of reporting periods. At October 3, 2020, and December 28, 2019, those contract liabilities totaled $19.5 $7.9 $18.7 $7.4 $0.8 $0.5 $24.1 $10.5 Because of the short-term nature of our performance obligations, as discussed below, substantially all of our performance obligations are satisfied within the quarter following the end of a reporting period. As such, substantially all of the contract liabilities at December 28, 2019 were satisfied in the first quarter of 2020, and contract assets at December 28, 2019 were transferred to accounts receivable in the first quarter of 2020. Contract liabilities at October 3, 2020 represents cash received during the three-month period ended October 3, 2020, excluding amounts recognized as revenue during that period. Contract assets at October 3, 2020 represents revenue recognized during the three-month period ended October 3, 2020, excluding amounts transferred to accounts receivable during that period. Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer and is defined as the unit of account. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue as the performance obligation is satisfied. Our contracts with our customers generally represent an approved purchase order together with our standard terms and conditions. Our custom product contracts include distinct goods that are substantially the same and have the same pattern of transfer to the customer over time, and therefore represent a series of distinct goods accounted for as a single performance obligation. For volume products, we allocate the contract’s transaction price to each distinct performance obligation based on the estimated relative standalone selling price of each distinct good. Observable standalone sales are used to determine the standalone selling price. Certain customers are eligible for rebates based on their volume or purchases during an annual period. Rebates are recorded as a reduction to sales and were immaterial in all periods presented. Performance obligations are satisfied over time, generally for our custom products, and as of a point in time for our volume products. Performance obligations are supported by contracts with customers, and we have elected not to disclose our unsatisfied performance obligations as of October 3, 2020 under the short-term contract exemption as we expect such performance obligations will be satisfied within the quarter following the end of a reporting period. On February 1, 2020, we completed the acquisition of NewSouth. NewSouth’s contracts with customers include the manufacturing of goods and installation services related to those goods. Both the manufacturing of goods and installation services represent distinct and separate performance obligations of the Company. As the goods are custom in nature, and NewSouth has the right to full payment upon starting production, the performance obligations are satisfied over time, as opposed to a point in time. The contract transaction price is allocated to each performance obligation based on an estimate of stand-alone selling price. Because installation is performed shortly after completion of production, revenue on the total contract is recognized over a relatively short period of time. Policies Regarding Shipping and Handling Costs and Commissions on Contract Assets The Company has made a policy election to continue to recognize shipping and handling costs as a fulfillment activity. Treating shipping and handling as a fulfillment activity requires estimated shipping and handling costs for undelivered products and certain glass components on which we have recognized revenue and created a contract asset, to be accrued to match this cost with the recognized revenue. Sales taxes collected from customers are recorded on a net basis. The Company utilizes the practical expedient which permits expensing of costs to obtain a contract when the expected amortization period is one year or less, which typically results in expensing commissions paid to employees. We expense sales commissions paid to employees as sales are recognized, including sales from the creation of contract assets, as the expected amortization period is less than one year.

Warranty

Warranty	9 Months Ended
	Oct. 03, 2020
Guarantees And Product Warranties [Abstract]
Warranty	NOTE 3. WARRANTY Most of our manufactured products are sold with warranties. Warranty periods, which vary by product components, generally range from 1 to 10 years; however, the warranty period for a limited number of specifically identified components in certain applications is a lifetime. The majority of the products sold have warranties on components which range from 1 to 3 years. The amount charged to expense for warranties is based on management’s assessment of the cost per service call and the number of service calls expected to be incurred to satisfy warranty obligations on the current net sales. During the three months ended October 3, 2020, we recorded warranty expense at a rate of approximately 1.7% 1.8% 1.7% 1.7% The following table summarizes current period charges, adjustments to previous estimates, if necessary, as well as settlements, which represent actual costs incurred during the period for the three and nine months ended October 3, 2020, and September 28, 2019. The change in the warranty reserve for the nine months ended October 3, 2020 includes $2.5 $0.9 $7.7 $6.2 Beginning Acquisition- Charged End of Accrued Warranty of Period Related to Expense Adjustments Settlements Period (in thousands) Three months ended October 3, 2020 $ 7,267 $ 918 $ 4,049 $ (3 ) $ (4,519 ) $ 7,712 Three months ended September 28, 2019 $ 5,980 $ — $ 3,600 $ 660 $ (3,381 ) $ 6,859 Nine months ended October 3, 2020 $ 6,244 $ 2,510 $ 11,503 $ 30 $ (12,575 ) $ 7,712 Nine months ended September 28, 2019 $ 6,149 $ — $ 9,595 $ 868 $ (9,753 ) $ 6,859

Inventories

Inventories	9 Months Ended
	Oct. 03, 2020
Inventory Disclosure [Abstract]
Inventories	NOTE 4. INVENTORIES Inventories consist principally of raw materials purchased for the manufacture of our products. We have limited finished goods inventory since the substantial majority of our products are custom, made-to-order and the revenue on these products, as well as the related cost, has been fully recognized upon completion of the manufacturing process. Finished goods inventory and work-in-progress costs include direct materials, direct labor, and overhead. All inventories are stated at the lower of cost (first-in, first-out method) or net realizable value. Inventories consisted of the following: October 3, December 28, 2020 2019 (in thousands) Raw materials $ 51,059 $ 41,255 Work-in-progress 3,529 2,337 Finished goods 119 259 $ 54,707 $ 43,851

Stock Based Compensation

Stock Based Compensation	9 Months Ended
	Oct. 03, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Based Compensation	NOTE 5. STOCK BASED-COMPENSATION Exercises For the three months ended October 3, 2020, there were no option exercises. For the nine months ended October 3, 2020, there were 274,353 Issuance On February 14, 2020, we granted 305,030 restricted stock awards to certain executives and non-executive employees of the Company under the 2020 Long-Term Incentive Plan (LTIP). The restrictions on these stock awards lapse over time based solely on continued service with respect to one-half of the granted shares and based on the achievement of a performance metric and the lapse of time, with respect to the other half. Specifically, the quantity of restricted shares issued upon vesting on half of these shares, or 152,515 shares, is fixed, whereas the quantity issued upon vesting on the remaining half, or 152,515 shares, is subject to Company-specific performance criteria. The restricted stock awards have a fair value on date of grant of $16.56 per share based on the closing New York Stock Exchange market price of the common stock on the day prior to the day the awards were granted. Those restricted shares whose quantity is fixed vest in equal amounts over a three-year With respect to the one-half of the granted restricted shares that must be earned through the satisfaction of performance criteria, the performance criteria, as defined in the share awards, provides for a graded awarding of shares based on the percentage by which the Company meets earnings before interest and taxes, as defined, in our 2020 business plan. The performance percentages, ranging from less than 80% to greater than 120%, provide for the awarding of shares ranging from no shares to 150% of the target number of shares. None of the restricted stock awards granted under last year’s 2019 LTIP that must be earned through the achievement of the performance criteria were earned, because the Company did not achieve at least 80% of the target level of our 2019 LTIP performance metric, resulting in 0% of the target number of performance shares being earned. On May 21, 2020, we granted a total of 42,360 $13.41 Stock Compensation Expense We record stock compensation expense over an equity award’s vesting period based on the award’s fair value at the date of grant. We recorded compensation expense for stock-based awards of $1.5 $1.0 $4.4 $3.2 $7.8 Of the $1.5 $1.0 $1.3 $0.8 $4.4 $3.2 $3.9 $2.7

Acquisition

Acquisition	9 Months Ended
	Oct. 03, 2020
Business Combinations [Abstract]
Acquisition	NOTE 6. ACQUISITION NEWSOUTH WINDOW SOLUTIONS On February 1, 2020 of million, which was paid during the third quarter of 2020, described below The estimated fair value of assets acquired, and liabilities assumed as of the closing date, are as follows: Initial Allocation Adjustments to Allocation Preliminary Allocation Accounts receivable $ 10,294 $ (1,639 ) $ 8,655 Inventories 3,757 (698 ) 3,059 Contract assets, net 4,413 — 4,413 Prepaid expenses and other assets 1,756 — 1,756 Property and equipment 7,423 10 7,433 Operating lease right-of-use asset 10,578 — 10,578 Intangible assets 28,670 (1,300 ) 27,370 Goodwill 46,200 4,625 50,825 Accounts payable (6,621 ) — (6,621 ) Accrued and other liabilities (5,524 ) (998 ) (6,522 ) Operating lease liability (10,578 ) — (10,578 ) Purchase price $ 90,368 $ — $ 90,368 Consideration: Cash $ 90,145 $ 223 $ 90,368 Due to Sellers 223 (223 ) - Total fair value of consideration $ 90,368 $ — $ 90,368 The fair value of certain working capital related items, including NewSouth’s retail accounts receivable, prepaid expenses, and accounts payable and accrued liabilities, approximated their book values at the date of the NewSouth Acquisition. Subsequent to our initial allocation, we adjusted the fair value of certain acquired commercial receivable accounts based on a further post-acquisition assessment of their collectability. The fair value of inventory was estimated by major category, at net realizable value. The substantial majority of inventories at the acquisition da te was composed of raw materials. The fair value of property and equipment and remaining useful lives were estimated by management, with the assistance of a third-party valuation firm, using the cost approach. Valuations of the intangible assets were done using income and royalty relief approaches based on projections provided by management, which we consider to be Level 3 inputs , with the assistance of a third-party valuations firm . We incurred acquisition costs totaling $2.4 $0.9 The remaining consideration, after identified intangible assets and the net assets and liabilities recorded at fair value, has been determined to be $50.8 $0.9 $1.6 $1.3 $0.7 $0.1 $4.6 The purchase agreement relating to the NewSouth Acquisition (“PA”) requires certain post-closing adjustments, under which we determined that we owe sellers an additional $0.2 $0.2 Pro Forma Financial Information The following unaudited pro forma financial information assumes the acquisition had occurred at the beginning of the earliest period presented that does not include NewSouth’s actual results for the entire period. Pro forma results have been prepared by adjusting our historical results to include the results of NewSouth adjusted for the following: amortization expense related to the intangible assets arising from the acquisition and interest expense to reflect the Additional Senior Notes. The unaudited pro forma results below do not necessarily reflect the results of operations that would have resulted had the acquisition been completed at the beginning of the earliest periods presented, nor does it indicate the results of operations in future periods. The unaudited pro forma results do not include the impact of synergies, nor any potential impacts on current or future market conditions which could alter the following unaudited pro forma results. Three Months Ended Nine Months Ended September 28, October 3, September 28, 2019 2020 2019 (unaudited) Net sales $ 219,780 668,772 633,344 Net income $ 15,619 35,351 42,181 Net income per common share: Basic $ 0.27 $ 0.60 $ 0.72 Diluted $ 0.26 $ 0.60 $ 0.71 V aluation of identified intangible assets The valuation of the identifiable intangible assets acquired in the NewSouth Acquisition and our estimate of their respective useful lives are as follows: Initial Initial Adjustment to Current Useful Life Valuation Valuation Valuation (in years) (in thousands) Trade name $ 23,500 $ (1,300 ) $ 22,200 15 Non-compete agreements 1,670 — 1,670 5 Developed technology 2,600 — 2,600 6 Customer-related intangible 900 — 900 <1 Other intangible assets, net $ 28,670 $ (1,300 ) $ 27,370

Net Income Per Common Share

Net Income Per Common Share	9 Months Ended
	Oct. 03, 2020
Earnings Per Share [Abstract]
Net Income Per Common Share	NOTE 7. NET INCOME PER COMMON SHARE Basic earnings per share (“EPS”) is computed by dividing net income available to common shareholders by the weighted-average number of common shares outstanding during the period. Diluted EPS reflects the dilutive effect of potential common shares from securities such as stock options. There were no anti-dilutive securities excluded from the calculation of weighted average shares outstanding for the three months ended October 3, 2020, and 86 4 90 The table below presents the calculation of EPS and a reconciliation of weighted average common shares used in the calculation of basic and diluted EPS : Three Months Ended Nine Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 (in thousands, except per share amounts) Net income $ 17,322 $ 15,106 $ 35,121 $ 40,408 Weighted-average common shares - Basic 58,963 58,433 58,858 58,320 Add: Dilutive shares from equity plans 479 709 433 872 Weighted-average common shares - Diluted 59,442 59,142 59,291 59,192 Net income per common share: Basic $ 0.29 $ 0.26 $ 0.60 $ 0.69 Diluted $ 0.29 $ 0.26 $ 0.59 $ 0.68

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Oct. 03, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 8. GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and intangible assets are as follows: Initial October 3, December 28, Useful Life 2020 2019 (in years) (in thousands) Goodwill $ 328,425 $ 277,600 indefinite Other intangible assets: Trade names (indefinite-lived) $ 140,841 $ 148,841 indefinite Customer relationships and customer-related assets 201,547 200,647 <1-10 Trade name (amortizable) 22,200 - 15 Developed technology 5,600 3,000 6-10 Non-compete agreement 3,338 1,668 2-5 Software license 590 590 2 Less: Accumulated amortization (112,908 ) (98,784 ) Subtotal 120,367 107,121 Other intangible assets, net $ 261,208 $ 255,962 Goodwill at December 28, 2019 $ 277,600 Increase related to the acquisition of NewSouth 50,825 Goodwill at October 3, 2020 $ 328,425 Trade names at December 28, 2019 $ 148,841 Impairment of WWS trade name (8,000 ) Tradenames at October 3, 2020 $ 140,841 Estimated amortization of our amortizable intangible assets for future years is as follows: (in thousands) Total Remainder of 2020 $ 4,729 2021 17,641 2022 16,782 2023 14,621 2024 14,575 Thereafter 52,019 Total $ 120,367 Amortization expense relating to amortizable intangible assets for the three months ended October 3, 2020, and September 28, 2019, was $4.7 $3.9 $14.1 $12.0 We perform our annual goodwill and indefinite-lived intangible asset impairment testing on the first day of our fiscal fourth quarter of each year, and at interim periods if needed based on occurrence of triggering events. Given the general deterioration in economic and market conditions associate with the COVID-19 pandemic, and the narrow excess of fair value over carrying value of our WinDoor and WWS trade names as described in our 2019 Annual Report on Form 10-K, the Company determined it should complete interim quantitative impairment tests of its WinDoor and WWS trade names as of as of the end of the Company’s first quarter of 2020. These interim impairment tests did not indicate that impairments of those assets existed at that time. Following an increase in net sales of 14.0% 19.3% $8.0 The rate of decrease in sales at our WWS reporting unit slowed during the third quarter of 2020, decreasing just 4.6% For our WWS reporting unit, our most recent annual impairment test of goodwill was a quantitative assessment. Based on this quantitative assessment, we concluded that it was not more likely than not that the carrying value of our WWS reporting unit exceeded its fair value, as the estimated fair value of our WWS reporting unit substantially exceeded the carrying value at that time. Because of the decrease in sales at our WWS reporting unit and continued deterioration in macro-economic conditions in our core western markets relating to the COVID-19 pandemic as described above, we determined to update the projections in our most recent quantitative assessment of WWS reporting unit to goodwill using the sales projections in our WWS trade name impairment assessment that is discussed above. Based on this update of the most recent quantitative assessment, the amount by which the estimated fair value of our WWS reporting unit exceeds its carrying value has decreased, but such fair value was still estimated to be approximately 10%

Long-Term Debt

Long-Term Debt	9 Months Ended
	Oct. 03, 2020
Debt Disclosure [Abstract]
Long-Term Debt	NOTE 9. LONG-TERM DEBT October 3, December 28, 2020 2019 (in thousands) 2018 Senior Notes due 2026, maturing in August 2026 $ 365,000 $ 315,000 2016 Credit Agreement due 2022, maturing in October 2022 54,000 64,000 Long-term debt 419,000 379,000 Fees, costs, discount and premium (7,183 ) (10,029 ) Long-term debt, net $ 411,817 $ 368,971 2018 Senior Notes due 2026 On August 10, 2018, we completed the issuance of $315.0 On January 24, 2020, we completed the add-on issuance of $50.0 $3.2 $90.4 The 2018 Senior Notes due 2026 mature on August 10, 2026. Interest on the 2018 Senior Notes due 2026 is payable semi-annually, in arrears, beginning on February 16, 2019, with interest accruing at a rate of 6.75% per annum from August 10, 2018. We incurred financing costs relating to bank fees and professional services costs relating to the offering and issuance of the 2018 Senior Notes due 2026 totaling $10.4 $1.3 $3.2 $365.0 $4.3 The indenture for the 2018 Senior Notes due 2026 gives us the option to redeem some or all of the 2018 Senior Notes due 2026 at the redemption prices and on the terms specified in the indenture governing the 2018 Senior Notes due 2026. The indenture governing the 2018 Senior Notes due 2026 does not require us to make any mandatory redemptions or sinking fund payments. However, upon the occurrence of a change of control, as defined in the indenture, the Company is required to offer to repurchase the notes at 101% of the aggregate principal amount thereof, plus accrued and unpaid interest, if any, to the date of purchase. The indenture for the 2018 Senior Notes due 2026 includes certain covenants limiting the ability of the Company and any guarantors to, (i) incur additional indebtedness; (ii) pay dividends on or make distributions in respect of capital stock or make certain other restricted payments or investments; (iii) enter into agreements that restrict distributions from restricted subsidiaries; (iv) sell or otherwise dispose of assets; (v) enter into transactions with affiliates; (vi) create or incur liens; merge, consolidate or sell all or substantially all of the Company’s assets; (vii) place restrictions on the ability of subsidiaries to pay dividends or make other payments to the Company; and (viii) designate the Company’s subsidiaries as unrestricted subsidiaries. These covenants are subject to a number of important exceptions and qualifications. 2016 Credit Agreement due 2022 On February 16, 2016, we entered into the 2016 Credit Agreement due 2022, among us, the lending institutions identified in the 2016 Credit Agreement due 2022, and Truist Financial Corporation (formerly known as SunTrust Bank), as Administrative Agent and Collateral Agent. The 2016 Credit Agreement due 2022 establishes new senior secured credit facilities in an aggregate amount of $310.0 million, consisting of a $270.0 million Term B term loan facility originally maturing in February 2022 that amortizes on a basis of 1% annually during its six-year On March 16, 2018, we entered into an amendment of our 2016 Credit Agreement due 2022 (the “Second Amendment”). The Second Amendment, among other things, decreases the applicable interest rate margins for the Initial Term Loans (as defined in the 2016 Credit Agreement due 2022) from (i) 3.75% to 2.50%, in the case of the Base Rate Loans (as defined in the 2016 Credit Agreement due 2022), and (ii) 4.75% to 3.50%, in the case of the Eurodollar Loans (as defined in the 2016 Credit Agreement due 2022). On February 17, 2017, we entered into the first amendment to our 2016 Credit Agreement due 2022, which also resulted in decreases in the applicable margins, but which, unlike the Second Amendment, did not include any changes in lender positions. On October 31, 2019, we entered into an amendment of our 2016 Credit Agreement due 2022 (“Third Amendment”). The Third Amendment provides for, among other things, (i) a three-year $64.0 five-year Pursuant to the Third Amendment, interest on all loans under the 2016 Credit Agreement is payable either quarterly or at the expiration of any LIBOR interest period applicable thereto. The Third Amendment decreases the applicable interest rate margins for the Initial Term Loan A from (i) 2.50% to a spread of 1.00% to 1.75% based on our first lien net leverage ratio, in the case of the Base Rate Loans (with a floor of 100 basis points), and (ii) 3.50% to a spread ranging from 2.00% to 2.75% based on our first lien leverage ratio, in the case of the Eurodollar Loans (with a floor of zero basis points). Also, in connection with the Third Amendment, we will pay quarterly fees on the unused portion of the revolving credit facility equal to a percentage spread (ranging from 0.25% to 0.35%) based on our first lien net leverage ratio. The Third Amendment also modifies the springing financial covenant under the 2016 Credit Agreement to provide that such financial covenant will not be tested until the Initial Term A Loan is paid in full. As of October 3, 2020, there were $4.0 mill $76.0 Fees and costs relating to the Third Amendment were $0.9 $1.5 $10.0 $54.0 $70 The weighted average all-in interest rate for borrowings under the term-loan portion of the 2016 Credit Agreement due 2022 was 2.17% 3.77% Pursuant to the Third Amendment, the 2016 Credit Agreement due 2022 contains a springing financial covenant that would apply if we draw in excess of thirty-five percent (35%) of the revolving facility commitment (excluding $7.5 million of undrawn letters of credit and letters of credit and draws thereunder that are cash collateralized at 103% of the stated amount thereof from such availability test). To the extent in effect, the springing financial covenant would prohibit us from exceeding a maximum first lien net leverage ratio (based on the ratio of total first lien (less unrestricted cash) debt to EBITDA) as of the last day of each applicable fiscal quarter. To the extent the springing financial covenant is in effect, the first lien net leverage ratio cannot exceed 4.00:1.00 (4.50:1.00 during a significant acquisition period as defined). We have not been required to test our first lien net leverage ratio because we have not exceeded 35% of our revolving capacity. The 2016 Credit Agreement due 2022 also contains a number of affirmative and restrictive covenants, including limitations on the incurrence of additional debt, liens on property, acquisitions and investments, loans and guarantees, mergers, consolidations, liquidations and dissolutions, asset sales, dividends and other payments in respect of our capital stock, entry into restrictive agreements, prepayments of certain debt and transactions with affiliates, in each case, subject to exceptions and qualifications. The 2016 Credit Agreement due 2022 also contains customary events of default. Upon the occurrence of an event of default, the amounts outstanding under the 2016 Credit Agreement due 2022 may be accelerated and may become immediately due and payable. On September 18, 2018, we completed an underwritten, public offering of 7,000,000 shares of our common stock, at a public offering price of $23.00 per share (the “2018 Equity Issuance”). The offering resulted in gross proceeds to the Company of $161.0 million. Net of an underwriting fee of $1.15 per share, net cash proceeds to the Company approximated $153.0 million. Contemporaneously with the 2018 Equity Issuance, we prepaid million in borrowings outstanding under the term loan portion of the 2016 Credit Agreement due 2022. Deferred Financing Costs The activity relating to third-party fees and costs, lender fees and discount for the nine months ended October 3, 2020, are as follows. All debt-related fees, costs and original issue discount are classified as a reduction of the carrying value of long-term debt: (in thousands) Total At beginning of year $ 10,029 Add: Deferred financing costs from the issuance of the add-on 2018 Senior Notes due 2026 1,266 Less: Premium on the issuance of the add-on 2018 Senior Notes due 2026 (3,187 ) Less: Amortization expense relating to 2016 Credit Agreement (265 ) Less: Amortization expense relating to 2018 Senior Notes (660 ) At end of period $ 7,183 Estimated amortization expense relating to third-party fees and costs, lender fees and discount for the years indicated as of October 3, 2020, is as follows: (in thousands) Total Remainder of 2020 $ 281 2021 1,169 2022 1,223 2023 1,183 2024 1,250 Thereafter 2,077 Total $ 7,183 As a result of prepayments of the 2016 Credit Agreement due 2022 totaling $214.0 (in thousands) Remainder of 2020 $ — 2021 — 2022 54,000 2023 — 2024 — Thereafter 365,000 Total $ 419,000

Leases

Leases	9 Months Ended
	Oct. 03, 2020
Leases [Abstract]
Leases	NOTE 10. LEASES We lease certain of our manufacturing facilities under operating leases. We also lease production equipment, vehicles, computer equipment, storage units and office equipment under operating leases. Our leases have remaining lease terms of 1 year to 9 years, some of which may include options to extend the leases for up to 5 years, and some of which may include options to terminate the leases within 1 year. All of our leases are operating leases. We did not recognize right-of-use assets or lease liabilities for certain short-term leases that are month-to-month leases. The lease expense relating to these leases is not significant. The components of lease expense for the three and nine months ended October 3, 2020, and September 28, 2019, are as follows. Certain amounts in prior periods have been reclassified to conform to the current presentation. There was no change to total lease cost. (in thousands): Three Months Ended Nine Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 Operating lease cost $ 2,364 $ 1,608 $ 6,775 $ 5,058 Variable lease cost 927 652 2,523 1,494 Total lease cost $ 3,291 $ 2,260 $ 9,298 $ 6,552 Other information relating to leases for the three and nine months ended October 3, 2020, and September 28, 2019, are as follows (in thousands, except years and percentages): Three Months Ended Nine Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 Supplemental cash flows information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows relating to operating leases $ (2,276 ) $ (1,546 ) $ (6,497 ) $ (4,506 ) Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 3,079 $ — $ 17,917 $ — Weighted average remaining lease term in years Operating leases 6.81 4.13 6.81 4.13 Weighted average discount rate Operating leases 5.8 % 6.2 % 5.8 % 6.2 % Future maturities under operating leases w ere as follows at October 3, 2020 , and December 28, 2019 (in thousands): October 3, December 28, 2020 2019 Remainder of 2020 $ 2,381 $ 6,319 2021 8,138 4,771 2022 7,305 3,878 2023 6,954 3,741 2024 6,560 3,771 Thereafter 19,604 13,691 Total future minimum lease payments 50,942 36,171 Less: Imputed interest (9,033 ) (7,428 ) Operating lease liability - total $ 41,909 $ 28,743 Reported as of October 3, 2020 and December 28, 2019: Current portion of operating lease liability $ 6,396 $ 4,703 Operating lease liability, less current portion 35,513 24,040 Operating lease liability - total $ 41,909 $ 28,743 As of October 3, 2020, we had no additional operating or finance leases that have not yet commenced. Our operating leases expire at various times through 2028. Lease expense prior to the adoption of ASU 2016-02 would have been $3.3 $2.3 $3.3 $1.6 $2.3 $1.0 $9.3 $6.6 $9.3 $4.7 $6.6 $3.0 $8.9 The $17.9 $10.6

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 03, 2020
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 11. COMMITMENTS AND CONTINGENCIES Legal Proceedings Our Company is a party to various legal proceedings in the ordinary course of business. Although the ultimate disposition of those proceedings cannot be predicted with certainty, management believes the outcome of any claim that is pending or threatened, either individually or in the aggregate, will not have a material adverse effect on our operations, financial position or cash flows.

Income Taxes

Income Taxes	9 Months Ended
	Oct. 03, 2020
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 12. INCOME TAXES Our income tax expense was $5.7 million for the three months ended October 3, 2020, compared with income tax expense of $3.9 million for the three months ended September 28, 2019. Our effective tax rate for the three months ended October 3, 2020, was an expense rate of 24.7%, and was an expense rate of 20.4% for the three months ended September 28, 2019. Our income tax expense was $9.4 $11.3 21.0% 21.8% Income tax expense in the three months ended October 3, 2020 included no discrete items of income tax, and in the nine months ended October 3, 2020 includes several discrete items of income tax benefits, including federal and state research and development tax credit true-ups to actual from the assumptions we made when preparing our 2019 tax provision, which totaled $319 $700 $553 $146 $665 $737 $1.7 Excluding discrete items of income tax, the effective tax rates for the three months ended October 3, 2020, and September 28, 2019, would have been income tax expense rates of 24.7% 24.8% 24.6% 25.3% Our estimated annual effective tax rate, excluding the discrete items discussed above, approximates our current combined statutory federal and state rate of 25.0%. In response to the Pandemic, in March 2020, the U.S. Congress passed the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”) legislation aimed at providing relief for individuals and businesses that have been negatively impacted by the Pandemic. The CARES Act did not have a material impact to our consolidated financial statements. During the three months ended October 3, 2020, we made payments of estimated Federal and state income taxes totaling $4.0 $700 $4.3 $10.8

Fair Value

Fair Value	9 Months Ended
	Oct. 03, 2020
Fair Value Disclosures [Abstract]
Fair Value	NOTE 13. FAIR VALUE Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A three-tier fair value hierarchy is used to prioritize the inputs used in measuring fair value. The hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The three levels of the fair value hierarchy are as follows: Level 1 Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2 Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 3 Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. The accounting guidance concerning fair value allows us to elect to measure financial instruments at fair value and report the changes in fair value through earnings. This election can only be made at certain specified dates and is irrevocable once made. We do not have a policy regarding specific assets or liabilities to elect to measure at fair value, but rather we make the election on an instrument-by-instrument basis as they are acquired or incurred. During the three or nine months ended October 3, 2020, or September 28, 2019, we did not make any transfers between Level 2 and Level 3 financial assets. We conduct reviews on a quarterly basis to verify pricing, assess liquidity, and determine if significant inputs have changed that would impact the fair value hierarchy disclosure. Fair Value of Financial Instruments Our financial instruments include cash and cash equivalents, accounts and notes receivable, and accounts payable and accrued liabilities, whose carrying amounts approximate their fair values due to their short-term nature. Our financial instruments also include borrowings under our 2016 Credit Agreement due 2022, as well as the 2018 Senior Notes due 2026, both classified as long-term debt. The fair value of borrowings under the 2016 Credit Agreement due 2022 approximates its carrying value due to its variable-rate nature, and was approximately $54.0 million as of October 3, 2020, compared to a principal outstanding value of $54.0 million, and fair value of $64.0 $64.0 $338.6 $315.0 Items Measured at Fair Value on a Recurring Basis The following are measured in the condensed consolidated financial statements at fair value on a recurring basis and are categorized in the table below based upon the lowest level of significant input to the valuation (in thousands): Fair Value Measurements Assets (Liabilities) Quoted Significant Prices in Other Significant Active Observable Unobservable October 3, Markets Inputs Inputs 2020 (Level 1) (Level 2) (Level 3) Description Aluminum forward contracts $ 330 $ — $ 330 $ — MTP contracts (30 ) — (30 ) — $ 300 $ — $ 300 $ — Fair Value Measurements Assets (Liabilities) Quoted Significant Prices in Other Significant Active Observable Unobservable December 28, Markets Inputs Inputs 2019 (Level 1) (Level 2) (Level 3) Description Aluminum forward contracts $ (317 ) $ — $ (317 ) $ — $ (317 ) $ — $ (317 ) $ — See Note 14 for a description of the methods and assumptions used in the determination of the fair values of our aluminum forward and Midwest Transaction Premium (“MTP”) contracts, as well as the basis for classifying these assets and liabilities as Level 2.

Derivatives

Derivatives	9 Months Ended
	Oct. 03, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives	NOTE 14. DERIVATIVES Aluminum Contracts and Midwest Transaction Premium We enter into aluminum forward contracts to hedge the fluctuations in the purchase price of aluminum extrusion we use in production. Beginning late in the first quarter of 2020, we began entering into forward contracts to hedge the fluctuations in the price of the delivery component of our aluminum extrusion purchases, known as the Midwest Transaction Premium. Our contracts are designated as cash flow hedges since they are highly effective in offsetting changes in the cash flows attributable to forecasted purchases of aluminum and the related MTP. We record our aluminium hedge contracts at fair value, based on trading values for aluminum forward contracts. Aluminum forward contracts identical to those held by us trade on the London Metal Exchange (“LME”). The LME provides a transparent forum and is the world’s largest center for the trading of futures contracts for non-ferrous metals. The prices are used by the metals industry worldwide as the basis for contracts for the movement of physical material throughout the production cycle. Based on this high degree of volume and liquidity in the LME, we believe the valuation price at any measurement date for contracts with identical terms as to prompt date, trade date and trade price as those we hold at any time represents a contract’s exit price to be used for purposes of determining fair value. We record our MTP hedge contracts at fair value based on the Platts MW US Transaction price per pound assessment, which has been a benchmark for decades in the North American aluminium industry. Platts surveys the North American market daily to capture trades, bids and offers on a delivered Midwest basis. Data is normalized to reflect the typical price per pound between the largest number of market participants, for delivery within 7 to 30 days from date of publication, net-30-day payment terms, for typical order quantities, chemistries and freight allowances. The survey is extensive and encompasses both domestic and offshore producers, traders and brokers that are varied in scope. Based on the extensive nature of this pricing mechanism, we believe the Platts MW US Transaction price at any time represents a contract’s exit price to be used for purposes of determining fair value. Guidance under the Financial Instruments Topic 825 of the Codification requires us to record our hedge contracts at fair value and consider our credit risk for contracts in a liability position, and our counter-party’s credit risk for contracts in an asset position, in determining fair value. We assess our counter-party’s risk of non-performance when measuring the fair value of financial instruments in an asset position by evaluating their financial position, including cash on hand, as well as their credit ratings. We assess our risk of non-performance when measuring the fair value of our financial instruments in a liability position by evaluating our credit ratings, our current liquidity including cash on hand and availability under our revolving credit facility as compared to the maturities of the financial liabilities. At October 3, 2020, the fair value of our aluminum forward contracts was in a net asset position of $0.3 million. We had 28 34.6 $0.80 one fifteen $30 14 31.5 $0.12 one fifteen We assess the effectiveness of our aluminum forward contracts by comparing the change in the fair value of the forward contract to the change in the expected cash to be paid for the hedged item. The effective portion of the gain or loss on our aluminum forward contracts is reported as a component of accumulated other comprehensive loss and is reclassified into earnings in the same line item in the income statement as the hedged item in the same period or periods during which the transaction affects earnings. The amount of income, net, recognized in the “accumulated other comprehensive income (loss)” line item in the accompanying condensed consolidated balance sheet as of October 3, 2020, that we expect will be reclassified to earnings within the next twelve months, is approximately $0.2 million. The fair values of our aluminum hedges and MTP contracts are classified in the accompanying condensed consolidated balance sheets at October 3, 2020, and December 28, 2019, as follows (in thousands): Derivative Assets Derivative Liabilities October 3, 2020 October 3, 2020 Derivatives designated as hedging instruments under Subtopic 815-20: Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivative instruments: Aluminum forward contracts Other current assets $ 429 Accrued liabilities $ (233 ) MTP contracts Other current assets 93 Accrued liabilities (113 ) Aluminum forward contracts Other assets 136 Other liabilities (2 ) MTP contracts Other assets 28 Other liabilities (38 ) Total derivative instruments Total derivative assets $ 686 Total derivative liabilities $ (386 ) Derivative Assets Derivative Liabilities December 28, 2019 December 28, 2019 Derivatives designated as hedging instruments under Subtopic 815-20: Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivative instruments: Aluminum forward contracts Other current assets $ 193 Accrued liabilities $ (510 ) Aluminum forward contracts Other assets — Other liabilities — Total derivative instruments Total derivative assets $ 193 Total derivative liabilities $ (510 ) The ending accumulated balance for the aluminum forward and MTP contracts included in accumulated other comprehensive income (losses), net of tax, was an accumulated other comprehensive income of $0.2 $0.2 The following represents the gains (losses) on derivative financial instruments, and their classifications within the accompanying condensed consolidated financial statements, for the three months ended October 3, 2020, and September 28, 2019 (in thousands): Derivatives in Cash Flow Hedging Relationships Amount of Gain or (Loss) Recognized in OCI(L) on Derivatives Location of Gain or (Loss) Reclassified from Accumulated OCI(L) into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI(L) into Income Three Months Ended Three Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 Aluminum contracts $ 1,452 $ (1,136 ) Cost of sales $ (680 ) $ (1,532 ) MTP contracts $ 111 $ — Cost of sales $ 148 $ — Derivatives in Cash Flow Hedging Relationships Amount of Gain or (Loss) Recognized in OCI(L) on Derivatives Location of Gain or (Loss) Reclassified from Accumulated OCI(L) into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI(L) into Income Nine Months Ended Nine Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 Aluminum contracts $ (2,152 ) $ (2,083 ) Cost of sales $ (2,798 ) $ (3,670 ) MTP contracts $ 32 $ — Cost of sales $ 61 $ —

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Oct. 03, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	NOTE 15. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table shows the components of accumulated other comprehensive income (loss) for the three and nine months ended October 3, 2020, and September 28, 2019 (in thousands): Aluminum Three months ended October 3, 2020 Forward MTP (in thousands) Contracts Contracts Total Balance at July 4, 2020 $ (1,352 ) $ 6 $ (1,346 ) Change in fair value of derivatives 1,452 111 1,563 Amounts reclassified from other comprehensive loss 680 (148 ) 532 Tax effect (533 ) 9 (524 ) Net current-period other comprehensive income 1,599 (28 ) 1,571 Balance at October 3, 2020 $ 247 $ (22 ) $ 225 Aluminum Nine months ended October 3, 2020 Forward MTP (in thousands) Contracts Contracts Total Balance at December 28, 2019 $ (238 ) $ — $ (238 ) Change in fair value of derivatives (2,152 ) 32 (2,120 ) Amounts reclassified from other comprehensive loss 2,798 (61 ) 2,737 Tax effect (161 ) 7 (154 ) Net current-period other comprehensive income 485 (22 ) 463 Balance at October 3, 2020 $ 247 $ (22 ) $ 225 Aluminum Three months ended September 28, 2019 Forward (in thousands) Contracts Total Balance at June 29, 2019 $ (2,178 ) $ (2,178 ) Change in fair value of derivatives (1,136 ) (1,136 ) Amounts reclassified from other comprehensive loss 1,532 1,532 Tax effect (102 ) (102 ) Net current-period other comprehensive income 294 294 Balance at September 28, 2019 $ (1,884 ) $ (1,884 ) Aluminum Nine months ended September 28, 2019 Forward (in thousands) Contracts Total Balance at December 29, 2018 $ (3,065 ) $ (3,065 ) Change in fair value of derivatives (2,083 ) (2,083 ) Amounts reclassified from other comprehensive loss 3,670 3,670 Tax effect (406 ) (406 ) Net current-period other comprehensive income 1,181 1,181 Balance at September 28, 2019 $ (1,884 ) $ (1,884 )

Segments

Segments	9 Months Ended
	Oct. 03, 2020
Segment Reporting [Abstract]
Segments	NOTE 16. SEGMENTS We have two reportable segments: the Southeast segment, and the Western segment. The Southeast reporting segment, which is also an operating segment, is composed of sales from our facilities in Florida. The Western reporting segment, also an operating segment, is composed of sales from our facility in Arizona. Beginning in 2020, sales into certain states have been reclassified between segments. As such, segment sales amounts for the three and nine months ended September 28, 2019, along with the related income from operations, have been revised to conform to the 2020 presentation. Centralized financial and operational oversight, including resource allocation and assessment of performance on an income (loss) from operations basis, is performed by our CEO, whom we have determined to be our chief operating decision maker (“CODM”), with oversight by the Board of Directors. Total asset information by segment is not included herein as asset information by segment is not presented to or reviewed by the CODM. The following table represents summary financial data attributable to our operating segments for the three and nine months ended October 3, 2020, and September 28, 2019. Results of the Western segment are composed of the results of WWS (in thousands): Three Months Ended Nine Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 Net sales: Southeast segment $ 203,741 $ 161,892 $ 560,241 $ 465,051 Western segment 34,292 35,931 100,779 105,079 Total net sales $ 238,033 $ 197,823 $ 661,020 $ 570,130 Income (loss) from operations: Southeast segment $ 25,739 $ 22,410 $ 70,277 $ 62,892 Western segment 4,538 3,021 7,401 8,709 Impairment of trade name (1) — — (8,000 ) — Restructuring costs and charges (2) (321 ) — (4,227 ) — Total income from operations 29,956 25,431 65,451 71,601 Interest expense, net 6,954 6,452 20,979 19,922 Total income before income taxes $ 23,002 $ 18,979 $ 44,472 $ 51,679 (1) For the nine months ended October 3, 2020, the impairment of $8.0 million relates to WWS trade name. (2) For the nine months ended October 3, 2020, the restructuring costs and charges of $4.2 million relates to Southeast segment, including an adjustment of $321 thousand uncured and disbursed in the three months ended October 3, 2020.

Restructuring Costs and Charges

Restructuring Costs and Charges	9 Months Ended
	Oct. 03, 2020
Restructuring And Related Activities [Abstract]
Restructuring Costs and Charges	NOTE 17. RESTRUCTURING COSTS AND CHARGES As we announced on April 20, 2020, the Company’s management approved a plan to consolidate its manufacturing operations in Florida, which included exiting our manufacturing facility in Orlando, Florida, where our WinDoor and Eze-Breeze products were assembled, and relocate the manufacturing of those products to the our Venice and Tampa, Florida plants, respectively. June 2020 The following represents activities of restructuring costs and charges for the nine months ended October 3, 2020, which includes an adjustment of $321 thousand incurred and disbursed in the three months ended October 3, 2020 related to additional property, plant and equipment costs: Nine Months Ended October 3, 2020 Beginning Charged Write-offs of End of Restructuring costs and charges of Period to Expense Assets Settled in Cash Period (in thousands) Property, plant and equipment costs and charges $ — $ 1,284 $ (540 ) $ (744 ) $ — Impairment of operating lease right-of-use asset — 639 (639 ) — — Inventory charges — 1,164 (1,263 ) 99 — Personnel-related costs — 1,140 — (1,140 ) — Total restructuring costs and charges $ — $ 4,227 $ (2,442 ) $ (1,785 ) $ —

Description of Business and B_2

Description of Business and Basis of Presentation (Policies)	9 Months Ended
	Oct. 03, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and do not include all the information and footnotes required by United States Generally Accepted Accounting Principles (“GAAP”) for complete financial statements. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the interim period are not necessarily indicative of the results that may be expected for the remainder of the current year or for any future periods. The Company’s fiscal third quarter in 2020 ended October 3, 2020, and our fiscal third quarter in 2019 ended September 28, 2019, both consisted of 13 weeks. The Company’s fiscal first nine months in 2020 ended October 3, 2020 consisted of 40 weeks, whereas our fiscal first nine months in 2019 ended September 28, 2019, consisted of 39 weeks. The condensed consolidated balance sheet as of December 28, 2019, is derived from the audited consolidated financial statements, but does not include all disclosures required by GAAP. The condensed consolidated balance sheet as of December 28, 2019, and the unaudited condensed consolidated financial statements as of and for the periods ended October 3, 2020, and September 28, 2019, should be read in conjunction with the more detailed audited consolidated financial statements for the year ended December 28, 2019, included in the Company’s most recent Annual Report on Form 10-K. The accounting policies used in the preparation of these unaudited condensed consolidated financial statements are consistent with the accounting policies described in the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could materially differ from those estimates. As described above, the extent to which the COVID-19 pandemic and resulting measures that may be taken by the Company and/or its customers or suppliers and/or by governmental entities will impact the Company's business will depend on future developments, which are highly uncertain and cannot be precisely predicted at this time. Management's estimates and assumptions are highly dependent on estimates of future developments and may change significantly in the future due to unforeseen direct and indirect impacts of the COVID-19 pandemic. We have two reportable segments: the Southeast segment, and the Western segment. The Southeast reporting segment, which is also an operating segment, is composed of sales from our facilities in Florida. The Western reporting segment, also an operating segment, is composed of sales from our facility in Arizona. Beginning in 2020, sales into certain states have been reclassified between segments. As such, segment sales amounts for the three and nine months ended September 28, 2019, along with the related income from operations, have been revised to conform to the 2020 presentation. See Note 16 for segment disclosures.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements Fair Value Measurement Disclosures In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820) - Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement”. The new guidance modifies disclosure requirements related to fair value measurement. The amendments in this ASU were effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Implementation on a prospective or retrospective basis varies by specific disclosure requirement. The Company adopted this guidance in the first quarter of 2020, and it did not have any impact on our fair value disclosures. Financial Instruments – Credit Losses In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 requires entities to measure all expected credit losses for most financial assets held at the reporting date based on an expected loss model which includes historical experience, current conditions, and reasonable and supportable forecasts. Entities will now use forward-looking information to better form their credit loss estimates. ASU 2016-13 also requires enhanced disclosures to help financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an entity’s portfolio. Subsequently, in November 2018, the FASB issued ASU 2018-19, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses”. ASU 2018-19 clarifies the codification and corrects unintended application of the guidance. ASU’s 2016-13 and 2018-19 were effective for us for our 2020 fiscal year. The adoption of this guidance did not have any impact on our consolidated financial statements. In the ordinary course of business, we extend credit to qualified dealers and distributors, generally on a non-collateralized basis. The Company maintains an allowance for doubtful accounts which is based on management’s assessments of the amount which may become uncollectible in the future and is determined through consideration of our write-off history, specific identification of uncollectible accounts based in part on the customer’s past due balance (based on contractual terms), and consideration of prevailing economic and industry conditions, and may include anticipated unfavorable impacts of the COVID-19 pandemic on the businesses of our customers, such as dealers and distributors. Uncollectible accounts are written off after repeated attempts to collect from the customer have been unsuccessful. As of October 3, 2020, and December 28, 2019, the allowance for doubtful accounts was million and million, respectively. Recently Issued Accounting Pronouncements Reference Rate Reform In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” ASU 2020-04 is intended to provide temporary optional expedients and exceptions to U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (LIBOR) and other interbank offered rates to alternative reference rates. The transition to new reference interest rates will require certain contracts to be modified and ASU 2020-04 is intended to mitigate the effects of this transition. This new guidance was effective upon issuance of this ASU for contract modifications and hedging relationships on a prospective basis. Accounting for Income Taxes In December 2019, the FASB issued ASU 2019-12, “Simplifying the Accounting for Income Taxes.” ASU 2019-12 simplifies the accounting for income taxes by removing certain exceptions to the general principles and also clarifies and amends existing guidance. This standard is effective beginning January 1, 2021, with early adoption permitted. We do not expect this standard to have a material impact on our consolidated financial statements.
Revenue Recognition Accounting Policy	Revenue Recognition Accounting Policy The Company primarily manufactures fully customized windows and doors based on design specifications, measurements, colors, finishes, framing materials, glass-types, and other options selected by the customer at the point in time an order is received. The Company has an enforceable right to payment at the time an order is received and accepted at the agreed-upon sales prices contained in our agreements with our customers for all manufacturing efforts expended on behalf of its customers. Due to the customized build-to-order nature of these products, the Company’s assessment is that the substantial portion of its finished goods and certain unused glass components have no alternative use, and that control of these products and components passes to the customer over time during the manufacturing of the products in an order, or upon our receipt of certain pre-cut glass components from our supplier attributed to specific customer orders. Based on these factors, the Company recognizes a substantial portion of revenue over time during the manufacturing process once customization begins, and for certain unused glass components on hand, at the end of a reporting period. Revenue on work-in-process at the end of a reporting period is recognized in proportion to costs incurred to total estimated cost of the product being manufactured. Except for the Western segment’s volume products, discussed in the section titled Disaggregation of Revenue from Contracts with Customers below, revenue recognized at a point in time is immaterial.
Shipping and Handling Cost and Commissions on Contract Assets	Policies Regarding Shipping and Handling Costs and Commissions on Contract Assets The Company has made a policy election to continue to recognize shipping and handling costs as a fulfillment activity. Treating shipping and handling as a fulfillment activity requires estimated shipping and handling costs for undelivered products and certain glass components on which we have recognized revenue and created a contract asset, to be accrued to match this cost with the recognized revenue. Sales taxes collected from customers are recorded on a net basis. The Company utilizes the practical expedient which permits expensing of costs to obtain a contract when the expected amortization period is one year or less, which typically results in expensing commissions paid to employees. We expense sales commissions paid to employees as sales are recognized, including sales from the creation of contract assets, as the expected amortization period is less than one year.

Revenue Recognition and Contr_2

Revenue Recognition and Contracts with Customers (Tables)	9 Months Ended
	Oct. 03, 2020
Revenue From Contract With Customer [Abstract]
Net Sales by Reporting Segment, Product Category and Market	The following tables provide information about our net sales by reporting segment, product category and market for the three and nine months ended October 3, 2020, and September 28, 2019 (dollars in millions): Three Months Ended Nine Months Ended October 3, September 28, October 3, September 28, Disaggregation of revenue (in millions) : 2020 2019 2020 2019 Reporting segment: Southeast $ 203.7 $ 161.9 $ 560.2 $ 465.1 Western 34.3 35.9 100.8 105.0 Total net sales $ 238.0 $ 197.8 $ 661.0 $ 570.1 Product category: Impact-resistant window and door products $ 173.3 $ 138.4 $ 471.0 $ 395.7 Non-impact window and door products 64.7 59.4 190.0 174.4 Total net sales $ 238.0 $ 197.8 $ 661.0 $ 570.1 Market: New construction $ 102.0 $ 95.6 $ 305.1 $ 281.5 Repair and remodel 136.0 102.2 355.9 288.6 Total net sales $ 238.0 $ 197.8 $ 661.0 $ 570.1

Warranty (Tables)

Warranty (Tables)	9 Months Ended
	Oct. 03, 2020
Guarantees And Product Warranties [Abstract]
Summary of Current Period Charges, Adjustments to Previous Estimates, Settlements representing Actual Costs Incurred with regard to Accrued Warranty	The following table summarizes current period charges, adjustments to previous estimates, if necessary, as well as settlements, which represent actual costs incurred during the period for the three and nine months ended October 3, 2020, and September 28, 2019. Beginning Acquisition- Charged End of Accrued Warranty of Period Related to Expense Adjustments Settlements Period (in thousands) Three months ended October 3, 2020 $ 7,267 $ 918 $ 4,049 $ (3 ) $ (4,519 ) $ 7,712 Three months ended September 28, 2019 $ 5,980 $ — $ 3,600 $ 660 $ (3,381 ) $ 6,859 Nine months ended October 3, 2020 $ 6,244 $ 2,510 $ 11,503 $ 30 $ (12,575 ) $ 7,712 Nine months ended September 28, 2019 $ 6,149 $ — $ 9,595 $ 868 $ (9,753 ) $ 6,859

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Oct. 03, 2020
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories consisted of the following: October 3, December 28, 2020 2019 (in thousands) Raw materials $ 51,059 $ 41,255 Work-in-progress 3,529 2,337 Finished goods 119 259 $ 54,707 $ 43,851

Acquisition (Tables)

Acquisition (Tables)	9 Months Ended
	Oct. 03, 2020
Business Combinations [Abstract]
Schedule of Fair Value of Assets and Liabilities Assumed	The estimated fair value of assets acquired, and liabilities assumed as of the closing date, are as follows: Initial Allocation Adjustments to Allocation Preliminary Allocation Accounts receivable $ 10,294 $ (1,639 ) $ 8,655 Inventories 3,757 (698 ) 3,059 Contract assets, net 4,413 — 4,413 Prepaid expenses and other assets 1,756 — 1,756 Property and equipment 7,423 10 7,433 Operating lease right-of-use asset 10,578 — 10,578 Intangible assets 28,670 (1,300 ) 27,370 Goodwill 46,200 4,625 50,825 Accounts payable (6,621 ) — (6,621 ) Accrued and other liabilities (5,524 ) (998 ) (6,522 ) Operating lease liability (10,578 ) — (10,578 ) Purchase price $ 90,368 $ — $ 90,368 Consideration: Cash $ 90,145 $ 223 $ 90,368 Due to Sellers 223 (223 ) - Total fair value of consideration $ 90,368 $ — $ 90,368
Summary of Unaudited Proforma Results	The unaudited pro forma results do not include the impact of synergies, nor any potential impacts on current or future market conditions which could alter the following unaudited pro forma results. Three Months Ended Nine Months Ended September 28, October 3, September 28, 2019 2020 2019 (unaudited) Net sales $ 219,780 668,772 633,344 Net income $ 15,619 35,351 42,181 Net income per common share: Basic $ 0.27 $ 0.60 $ 0.72 Diluted $ 0.26 $ 0.60 $ 0.71
Schedule for Valuation of Identifiable Intangible Assets Acquired and Estimate of Useful Lives	The valuation of the identifiable intangible assets acquired in the NewSouth Acquisition and our estimate of their respective useful lives are as follows: Initial Initial Adjustment to Current Useful Life Valuation Valuation Valuation (in years) (in thousands) Trade name $ 23,500 $ (1,300 ) $ 22,200 15 Non-compete agreements 1,670 — 1,670 5 Developed technology 2,600 — 2,600 6 Customer-related intangible 900 — 900 <1 Other intangible assets, net $ 28,670 $ (1,300 ) $ 27,370

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	9 Months Ended
	Oct. 03, 2020
Earnings Per Share [Abstract]
Calculation of EPS and Reconciliation of Weighted Average Common Shares Used in Calculation of Basic and Diluted EPS	The table below presents the calculation of EPS and a reconciliation of weighted average common shares used in the calculation of basic and diluted EPS : Three Months Ended Nine Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 (in thousands, except per share amounts) Net income $ 17,322 $ 15,106 $ 35,121 $ 40,408 Weighted-average common shares - Basic 58,963 58,433 58,858 58,320 Add: Dilutive shares from equity plans 479 709 433 872 Weighted-average common shares - Diluted 59,442 59,142 59,291 59,192 Net income per common share: Basic $ 0.29 $ 0.26 $ 0.60 $ 0.69 Diluted $ 0.29 $ 0.26 $ 0.59 $ 0.68

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Oct. 03, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Intangible Assets Net	Goodwill and intangible assets are as follows: Initial October 3, December 28, Useful Life 2020 2019 (in years) (in thousands) Goodwill $ 328,425 $ 277,600 indefinite Other intangible assets: Trade names (indefinite-lived) $ 140,841 $ 148,841 indefinite Customer relationships and customer-related assets 201,547 200,647 <1-10 Trade name (amortizable) 22,200 - 15 Developed technology 5,600 3,000 6-10 Non-compete agreement 3,338 1,668 2-5 Software license 590 590 2 Less: Accumulated amortization (112,908 ) (98,784 ) Subtotal 120,367 107,121 Other intangible assets, net $ 261,208 $ 255,962 Goodwill at December 28, 2019 $ 277,600 Increase related to the acquisition of NewSouth 50,825 Goodwill at October 3, 2020 $ 328,425 Trade names at December 28, 2019 $ 148,841 Impairment of WWS trade name (8,000 ) Tradenames at October 3, 2020 $ 140,841
Estimated Amortization for Future Fiscal Year	Estimated amortization of our amortizable intangible assets for future years is as follows: (in thousands) Total Remainder of 2020 $ 4,729 2021 17,641 2022 16,782 2023 14,621 2024 14,575 Thereafter 52,019 Total $ 120,367

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Oct. 03, 2020
Debt Disclosure [Abstract]
Schedule of Long-term Debt	October 3, December 28, 2020 2019 (in thousands) 2018 Senior Notes due 2026, maturing in August 2026 $ 365,000 $ 315,000 2016 Credit Agreement due 2022, maturing in October 2022 54,000 64,000 Long-term debt 419,000 379,000 Fees, costs, discount and premium (7,183 ) (10,029 ) Long-term debt, net $ 411,817 $ 368,971
Activity Relating to Third-Party Fees and Costs, Lender Fees and Discount	The activity relating to third-party fees and costs, lender fees and discount for the nine months ended October 3, 2020, are as follows. All debt-related fees, costs and original issue discount are classified as a reduction of the carrying value of long-term debt: (in thousands) Total At beginning of year $ 10,029 Add: Deferred financing costs from the issuance of the add-on 2018 Senior Notes due 2026 1,266 Less: Premium on the issuance of the add-on 2018 Senior Notes due 2026 (3,187 ) Less: Amortization expense relating to 2016 Credit Agreement (265 ) Less: Amortization expense relating to 2018 Senior Notes (660 ) At end of period $ 7,183
Estimated Amortization Expense Relating to Third-Party Fees and Costs, Lender Fees and Discount	Estimated amortization expense relating to third-party fees and costs, lender fees and discount for the years indicated as of October 3, 2020, is as follows: (in thousands) Total Remainder of 2020 $ 281 2021 1,169 2022 1,223 2023 1,183 2024 1,250 Thereafter 2,077 Total $ 7,183
Contractual Future Maturities of Long-Term Debt Outstanding, Including Remaining Balance of Financing Arrangement Described as Other Debt	As a result of prepayments of the 2016 Credit Agreement due 2022 totaling $214.0 (in thousands) Remainder of 2020 $ — 2021 — 2022 54,000 2023 — 2024 — Thereafter 365,000 Total $ 419,000

Leases (Tables)

Leases (Tables)	9 Months Ended
	Oct. 03, 2020
Leases [Abstract]
Components of Lease Expense	The components of lease expense for the three and nine months ended October 3, 2020, and September 28, 2019, are as follows. Certain amounts in prior periods have been reclassified to conform to the current presentation. There was no change to total lease cost. (in thousands): Three Months Ended Nine Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 Operating lease cost $ 2,364 $ 1,608 $ 6,775 $ 5,058 Variable lease cost 927 652 2,523 1,494 Total lease cost $ 3,291 $ 2,260 $ 9,298 $ 6,552
Other Information Relating to Leases	Other information relating to leases for the three and nine months ended October 3, 2020, and September 28, 2019, are as follows (in thousands, except years and percentages): Three Months Ended Nine Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 Supplemental cash flows information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows relating to operating leases $ (2,276 ) $ (1,546 ) $ (6,497 ) $ (4,506 ) Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 3,079 $ — $ 17,917 $ — Weighted average remaining lease term in years Operating leases 6.81 4.13 6.81 4.13 Weighted average discount rate Operating leases 5.8 % 6.2 % 5.8 % 6.2 %
Future Maturities under Operating Leases	Future maturities under operating leases w ere as follows at October 3, 2020 , and December 28, 2019 (in thousands): October 3, December 28, 2020 2019 Remainder of 2020 $ 2,381 $ 6,319 2021 8,138 4,771 2022 7,305 3,878 2023 6,954 3,741 2024 6,560 3,771 Thereafter 19,604 13,691 Total future minimum lease payments 50,942 36,171 Less: Imputed interest (9,033 ) (7,428 ) Operating lease liability - total $ 41,909 $ 28,743 Reported as of October 3, 2020 and December 28, 2019: Current portion of operating lease liability $ 6,396 $ 4,703 Operating lease liability, less current portion 35,513 24,040 Operating lease liability - total $ 41,909 $ 28,743

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Oct. 03, 2020
Fair Value Disclosures [Abstract]
Schedule of Fair Value on Recurring Basis	The following are measured in the condensed consolidated financial statements at fair value on a recurring basis and are categorized in the table below based upon the lowest level of significant input to the valuation (in thousands): Fair Value Measurements Assets (Liabilities) Quoted Significant Prices in Other Significant Active Observable Unobservable October 3, Markets Inputs Inputs 2020 (Level 1) (Level 2) (Level 3) Description Aluminum forward contracts $ 330 $ — $ 330 $ — MTP contracts (30 ) — (30 ) — $ 300 $ — $ 300 $ — Fair Value Measurements Assets (Liabilities) Quoted Significant Prices in Other Significant Active Observable Unobservable December 28, Markets Inputs Inputs 2019 (Level 1) (Level 2) (Level 3) Description Aluminum forward contracts $ (317 ) $ — $ (317 ) $ — $ (317 ) $ — $ (317 ) $ —

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Oct. 03, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Summary of Fair Values of Hedges and MTP Contracts	The fair values of our aluminum hedges and MTP contracts are classified in the accompanying condensed consolidated balance sheets at October 3, 2020, and December 28, 2019, as follows (in thousands): Derivative Assets Derivative Liabilities October 3, 2020 October 3, 2020 Derivatives designated as hedging instruments under Subtopic 815-20: Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivative instruments: Aluminum forward contracts Other current assets $ 429 Accrued liabilities $ (233 ) MTP contracts Other current assets 93 Accrued liabilities (113 ) Aluminum forward contracts Other assets 136 Other liabilities (2 ) MTP contracts Other assets 28 Other liabilities (38 ) Total derivative instruments Total derivative assets $ 686 Total derivative liabilities $ (386 ) Derivative Assets Derivative Liabilities December 28, 2019 December 28, 2019 Derivatives designated as hedging instruments under Subtopic 815-20: Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivative instruments: Aluminum forward contracts Other current assets $ 193 Accrued liabilities $ (510 ) Aluminum forward contracts Other assets — Other liabilities — Total derivative instruments Total derivative assets $ 193 Total derivative liabilities $ (510 )
Gains (Losses) on Derivative Financial Instruments	The following represents the gains (losses) on derivative financial instruments, and their classifications within the accompanying condensed consolidated financial statements, for the three months ended October 3, 2020, and September 28, 2019 (in thousands): Derivatives in Cash Flow Hedging Relationships Amount of Gain or (Loss) Recognized in OCI(L) on Derivatives Location of Gain or (Loss) Reclassified from Accumulated OCI(L) into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI(L) into Income Three Months Ended Three Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 Aluminum contracts $ 1,452 $ (1,136 ) Cost of sales $ (680 ) $ (1,532 ) MTP contracts $ 111 $ — Cost of sales $ 148 $ — Derivatives in Cash Flow Hedging Relationships Amount of Gain or (Loss) Recognized in OCI(L) on Derivatives Location of Gain or (Loss) Reclassified from Accumulated OCI(L) into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI(L) into Income Nine Months Ended Nine Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 Aluminum contracts $ (2,152 ) $ (2,083 ) Cost of sales $ (2,798 ) $ (3,670 ) MTP contracts $ 32 $ — Cost of sales $ 61 $ —

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Oct. 03, 2020
Equity [Abstract]
Components of Accumulated Other Comprehensive Income (Loss)	The following table shows the components of accumulated other comprehensive income (loss) for the three and nine months ended October 3, 2020, and September 28, 2019 (in thousands): Aluminum Three months ended October 3, 2020 Forward MTP (in thousands) Contracts Contracts Total Balance at July 4, 2020 $ (1,352 ) $ 6 $ (1,346 ) Change in fair value of derivatives 1,452 111 1,563 Amounts reclassified from other comprehensive loss 680 (148 ) 532 Tax effect (533 ) 9 (524 ) Net current-period other comprehensive income 1,599 (28 ) 1,571 Balance at October 3, 2020 $ 247 $ (22 ) $ 225 Aluminum Nine months ended October 3, 2020 Forward MTP (in thousands) Contracts Contracts Total Balance at December 28, 2019 $ (238 ) $ — $ (238 ) Change in fair value of derivatives (2,152 ) 32 (2,120 ) Amounts reclassified from other comprehensive loss 2,798 (61 ) 2,737 Tax effect (161 ) 7 (154 ) Net current-period other comprehensive income 485 (22 ) 463 Balance at October 3, 2020 $ 247 $ (22 ) $ 225 Aluminum Three months ended September 28, 2019 Forward (in thousands) Contracts Total Balance at June 29, 2019 $ (2,178 ) $ (2,178 ) Change in fair value of derivatives (1,136 ) (1,136 ) Amounts reclassified from other comprehensive loss 1,532 1,532 Tax effect (102 ) (102 ) Net current-period other comprehensive income 294 294 Balance at September 28, 2019 $ (1,884 ) $ (1,884 ) Aluminum Nine months ended September 28, 2019 Forward (in thousands) Contracts Total Balance at December 29, 2018 $ (3,065 ) $ (3,065 ) Change in fair value of derivatives (2,083 ) (2,083 ) Amounts reclassified from other comprehensive loss 3,670 3,670 Tax effect (406 ) (406 ) Net current-period other comprehensive income 1,181 1,181 Balance at September 28, 2019 $ (1,884 ) $ (1,884 )

Segments (Tables)

Segments (Tables)	9 Months Ended
	Oct. 03, 2020
Segment Reporting [Abstract]
Summary of Financial Data Attributable to Operating Segments	The following table represents summary financial data attributable to our operating segments for the three and nine months ended October 3, 2020, and September 28, 2019. Results of the Western segment are composed of the results of WWS (in thousands): Three Months Ended Nine Months Ended October 3, September 28, October 3, September 28, 2020 2019 2020 2019 Net sales: Southeast segment $ 203,741 $ 161,892 $ 560,241 $ 465,051 Western segment 34,292 35,931 100,779 105,079 Total net sales $ 238,033 $ 197,823 $ 661,020 $ 570,130 Income (loss) from operations: Southeast segment $ 25,739 $ 22,410 $ 70,277 $ 62,892 Western segment 4,538 3,021 7,401 8,709 Impairment of trade name (1) — — (8,000 ) — Restructuring costs and charges (2) (321 ) — (4,227 ) — Total income from operations 29,956 25,431 65,451 71,601 Interest expense, net 6,954 6,452 20,979 19,922 Total income before income taxes $ 23,002 $ 18,979 $ 44,472 $ 51,679 (1) For the nine months ended October 3, 2020, the impairment of $8.0 million relates to WWS trade name. (2) For the nine months ended October 3, 2020, the restructuring costs and charges of $4.2 million relates to Southeast segment, including an adjustment of $321 thousand uncured and disbursed in the three months ended October 3, 2020.

Restructuring Costs and Charg_2

Restructuring Costs and Charges (Tables)	9 Months Ended
	Oct. 03, 2020
Restructuring And Related Activities [Abstract]
Activities of Restructuring Costs and Charges	The following represents activities of restructuring costs and charges for the nine months ended October 3, 2020, which includes an adjustment of $321 thousand incurred and disbursed in the three months ended October 3, 2020 related to additional property, plant and equipment costs: Nine Months Ended October 3, 2020 Beginning Charged Write-offs of End of Restructuring costs and charges of Period to Expense Assets Settled in Cash Period (in thousands) Property, plant and equipment costs and charges $ — $ 1,284 $ (540 ) $ (744 ) $ — Impairment of operating lease right-of-use asset — 639 (639 ) — — Inventory charges — 1,164 (1,263 ) 99 — Personnel-related costs — 1,140 — (1,140 ) — Total restructuring costs and charges $ — $ 4,227 $ (2,442 ) $ (1,785 ) $ —

Description of Business and B_3

Description of Business and Basis of Presentation - Additional Information (Detail) $ in Millions	3 Months Ended	9 Months Ended
	Jul. 04, 2020Operation	Oct. 03, 2020USD ($)OperationPlantSegment	Dec. 28, 2019USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of reportable segments | Segment		2
Allowance for doubtful accounts | $		$ 3.2	$ 3.3
Florida [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of manufacturing operations	4
North Venice, Florida [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of manufacturing operations		1
Greater Miami, Florida [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of manufacturing operations		2
Arizona [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of manufacturing operations	1
Tampa [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of manufacturing operations		1
Glass Tempering and Laminating Plant [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of plants | Plant		2
Glass Tempering and Laminating Plant [Member] | North Venice [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of plants | Plant		2
Insulation Glass Plants [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of plants | Plant		1
Insulation Glass Plants [Member] | North Venice [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of plants | Plant		1

Revenue Recognition and Contr_3

Revenue Recognition and Contracts with Customers - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020USD ($)	Sep. 28, 2019USD ($)	Oct. 03, 2020USD ($)Segment	Sep. 28, 2019USD ($)	Dec. 28, 2019USD ($)
Disaggregation Of Revenue [Line Items]
Number of reportable segments | Segment			2
Net sales	$ 238,033	$ 197,823	$ 661,020	$ 570,130
Contract liabilities	19,500		19,500		$ 7,900
Contract assets, net	24,050		$ 24,050		10,547
Revenue recognition, practical expedient			true
NewSouth Window Solutions [Member]
Disaggregation Of Revenue [Line Items]
Business combination, effective date of acquisition			Feb. 1, 2020
Accrued Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Contract liabilities	18,700		$ 18,700		7,400
Contract Assets, Net [Member]
Disaggregation Of Revenue [Line Items]
Contract liabilities	800		800		$ 500
Western Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales	34,292	35,931	100,779	105,079
Western Segment [Member] | Volume Products [Member] | Passes at Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 12,600	$ 13,800	$ 39,000	$ 40,600

Revenue Recognition and Contr_4

Revenue Recognition and Contracts with Customers - Net Sales by Reporting Segment, Product Category and Market (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Disaggregation Of Revenue [Line Items]
Net sales	$ 238,033	$ 197,823	$ 661,020	$ 570,130
Southeast Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales	203,741	161,892	560,241	465,051
Western Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales	34,292	35,931	100,779	105,079
Impact-Resistant Windows and Door Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	173,300	138,400	471,000	395,700
Non-Impact Window and Door Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	64,700	59,400	190,000	174,400
New Construction [Member]
Disaggregation Of Revenue [Line Items]
Net sales	102,000	95,600	305,100	281,500
Repair and Remodel [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 136,000	$ 102,200	$ 355,900	$ 288,600

Warranty - Additional Informati

Warranty - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Product Warranty Liability [Line Items]
Warranty expense, average rate of sales	1.70%	1.80%	1.70%	1.70%
Changes in warranty reserve	$ (3)	$ 660	$ 30	$ 868
Accrued warranty reserve	7,700		7,700
NewSouth [Member]
Product Warranty Liability [Line Items]
Changes in warranty reserve	900		2,500
Accrued Expenses [Member]
Product Warranty Liability [Line Items]
Accrued warranty reserve	$ 6,200		$ 6,200
Minimum [Member]
Product Warranty Liability [Line Items]
Warranty periods			1 year
Warranty period of the majority of products sold			1 year
Maximum [Member]
Product Warranty Liability [Line Items]
Warranty periods			10 years
Warranty period of the majority of products sold			3 years

Warranty - Summary of Current P

Warranty - Summary of Current Period Charges, Adjustments to Previous Estimates, Settlements representing Actual Costs Incurred with regard to Accrued Warranty (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Guarantees And Product Warranties [Abstract]
Accrued Warranty, Beginning of Period	$ 7,267	$ 5,980	$ 6,244	$ 6,149
Accrued Warranty, Acquired	918		2,510
Accrued Warranty, Charged to Expense	4,049	3,600	11,503	9,595
Accrued Warranty, Adjustments	(3)	660	30	868
Accrued Warranty, Settlements	(4,519)	(3,381)	(12,575)	(9,753)
Accrued Warranty, End of Period	$ 7,712	$ 6,859	$ 7,712	$ 6,859

Inventories - Summary of Invent

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 28, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 51,059	$ 41,255
Work-in-progress	3,529	2,337
Finished goods	119	259
Inventories	$ 54,707	$ 43,851

Stock Based-Compensation - Addi

Stock Based-Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	May 21, 2020	Feb. 14, 2020	Oct. 03, 2020	Sep. 28, 2019	Jul. 04, 2020	Oct. 03, 2020	Sep. 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options exercised			0			274,353
Weighted average exercise price of options exercised						$ 2
Compensation expense for stock based awards			$ 1,500	$ 1,000		$ 4,369	$ 3,246
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for stock based awards			1,300	$ 800		3,900	$ 2,700
Executives and Non-Executive Employees [Member] | Fixed Criteria [Member] | 2020 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards		152,515
Options vesting period		3 years
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards	42,360
Fair value of common stock	$ 13.41
Total unrecognized compensation			$ 7,800			$ 7,800
Weighted-average period					1 year 8 months 12 days
Restricted Stock Award [Member] | 2019 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards						0
Restricted Stock Award [Member] | Executives and Non-Executive Employees [Member] | 2020 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards		305,030
Fair value of common stock		$ 16.56
Restricted Stock Award [Member] | Executives and Non-Executive Employees [Member] | 2019 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares issued based on target performance						0.00%
Restricted Stock Award [Member] | Executives and Non-Executive Employees [Member] | 2019 Long-Term Incentive Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target performance percentage not achieved						80.00%
Company Performance Criteria [Member] | Executives and Non-Executive Employees [Member] | 2020 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards		152,515
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance criteria defined in share awards						The performance percentages, ranging from less than 80% to greater than 120%, provide for the awarding of shares ranging from no shares to 150% of the target number of shares.
Restricted Stock [Member] | Executives and Non-Executive Employees [Member] | 2020 Long-Term Incentive Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance percentage		80.00%
Percentage of shares issuable based on target performance		0.00%
Restricted Stock [Member] | Executives and Non-Executive Employees [Member] | 2020 Long-Term Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance percentage		120.00%
Percentage of shares issuable based on target performance		150.00%

Acquisition - Additional Inform

Acquisition - Additional Information (Detail) - USD ($) $ in Thousands	Feb. 01, 2020	Oct. 03, 2020	Oct. 03, 2020	Dec. 28, 2019
Business Acquisition [Line Items]
Fair value of consideration	$ 90,368
Cash payment to acquire business	90,368
Goodwill	50,825	$ 328,425	$ 328,425	$ 277,600
Decrease in acquired accounts receivable	8,655
Decrease in commercial trade name	27,370
Decrease in commercial inventories	$ 3,059
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member]
Business Acquisition [Line Items]
Business combination, effective date of acquisition	Feb. 1, 2020
Fair value of consideration	$ 90,400
Additional payments owe to seller	200	200
Business combination, acquisition related costs	2,400		900
Goodwill	50,800
Net increase in the purchase price	200
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member] | Accrued Liabilities [Member]
Business Acquisition [Line Items]
Adjustments to accrued liabilities		900	900
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member] | Adjustments to Allocation [Member]
Business Acquisition [Line Items]
Cash payment to acquire business	223
Additional payments owe to seller	(223)
Goodwill	4,625	4,600	4,600
Decrease in acquired accounts receivable	(1,639)	1,600	1,600
Decrease in commercial trade name	(1,300)	1,300	1,300
Decrease in commercial inventories	(698)	700	700
Increase in liabilities assumed		$ 100	$ 100
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member] | Cash On Hand [Member]
Business Acquisition [Line Items]
Cash payment to acquire business	37,200
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member] | Premium [Member]
Business Acquisition [Line Items]
Cash payment to acquire business	3,200
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member] | 2018 Senior Notes due 2026 [Member]
Business Acquisition [Line Items]
Cash payment to acquire business	53,200
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member] | 2018 Senior Notes due 2026 [Member] | Add-on Issuance [Member]
Business Acquisition [Line Items]
Cash payment to acquire business	$ 50,000

Acquisition - Schedule of Fair

Acquisition - Schedule of Fair Value of Assets and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Feb. 01, 2020	Oct. 03, 2020	Dec. 28, 2019
Business Acquisition [Line Items]
Accounts receivable	$ 8,655
Inventories	3,059
Contract assets, net	4,413
Prepaid expenses and other assets	1,756
Property and equipment	7,433
Operating lease right-of-use asset	10,578
Intangible assets	27,370
Goodwill	50,825	$ 328,425	$ 277,600
Accounts payable	(6,621)
Accrued and other liabilities	(6,522)
Operating lease liability	(10,578)
Purchase price	90,368
Cash	90,368
Total fair value of consideration	90,368
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member]
Business Acquisition [Line Items]
Operating lease right-of-use asset		10,600
Goodwill	50,800
Due to Sellers	200	200
Total fair value of consideration	90,400
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Accounts receivable	10,294
Inventories	3,757
Contract assets, net	4,413
Prepaid expenses and other assets	1,756
Property and equipment	7,423
Operating lease right-of-use asset	10,578
Intangible assets	28,670
Goodwill	46,200
Accounts payable	(6,621)
Accrued and other liabilities	(5,524)
Operating lease liability	(10,578)
Purchase price	90,368
Cash	90,145
Due to Sellers	223
Total fair value of consideration	90,368
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member] | Adjustments to Allocation [Member]
Business Acquisition [Line Items]
Accounts receivable	(1,639)	1,600
Inventories	(698)	700
Property and equipment	10
Intangible assets	(1,300)	1,300
Goodwill	4,625	$ 4,600
Accrued and other liabilities	(998)
Cash	223
Due to Sellers	$ (223)

Acquisition - Summary of Unaudi

Acquisition - Summary of Unaudited Proforma Results (Detail) - New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Business Acquisition [Line Items]
Net sales	$ 219,780	$ 668,772	$ 633,344
Net income	$ 15,619	$ 35,351	$ 42,181
Net income per common share:
Basic	$ 0.27	$ 0.60	$ 0.72
Diluted	$ 0.26	$ 0.60	$ 0.71

Acquisition - Schedule for Valu

Acquisition - Schedule for Valuation of Identifiable Intangible Assets Acquired and Estimate of Useful Lives (Detail) - New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member] $ in Thousands	Feb. 01, 2020USD ($)
Business Acquisition [Line Items]
Valuation Amount	$ 27,370
Previously Reported [Member]
Business Acquisition [Line Items]
Valuation Amount	28,670
Adjustments to Valuation [Member]
Business Acquisition [Line Items]
Valuation Amount	(1,300)
Trade Name [Member]
Business Acquisition [Line Items]
Valuation Amount	$ 22,200
Useful Life (in years)	15 years
Trade Name [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Valuation Amount	$ 23,500
Trade Name [Member] | Adjustments to Valuation [Member]
Business Acquisition [Line Items]
Valuation Amount	(1,300)
Noncompete Agreements [Member]
Business Acquisition [Line Items]
Valuation Amount	$ 1,670
Useful Life (in years)	5 years
Noncompete Agreements [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Valuation Amount	$ 1,670
Developed Technology [Member]
Business Acquisition [Line Items]
Valuation Amount	$ 2,600
Useful Life (in years)	6 years
Developed Technology [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Valuation Amount	$ 2,600
Customer-related Intangible [Member]
Business Acquisition [Line Items]
Valuation Amount	$ 900
Customer-related Intangible [Member] | Maximum [Member]
Business Acquisition [Line Items]
Useful Life (in years)	1 year
Customer-related Intangible [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Valuation Amount	$ 900

Net Income Per Common Share - A

Net Income Per Common Share - Additional Information (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Earnings Per Share [Abstract]
Anti-dilutive securities excluded from the calculation of weighted average shares outstanding	0	86	4	90

Net Income Per Common Share - C

Net Income Per Common Share - Calculation of EPS and Reconciliation of Weighted Average Common Shares Used in Calculation of Basic and Diluted EPS (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Earnings Per Share [Abstract]
Net income	$ 17,322	$ 15,106	$ 35,121	$ 40,408
Weighted-average common shares - Basic	58,963	58,433	58,858	58,320
Add: Dilutive shares from equity plans	479	709	433	872
Weighted-average common shares - Diluted	59,442	59,142	59,291	59,192
Net income per common share:
Basic	$ 0.29	$ 0.26	$ 0.60	$ 0.69
Diluted	$ 0.29	$ 0.26	$ 0.59	$ 0.68

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Schedule of Goodwill and Intangible Assets Net (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 03, 2020	Dec. 28, 2019
Indefinite-lived Intangible Assets [Line Items]
Less: Accumulated amortization	$ (112,908)	$ (98,784)
Subtotal	120,367	107,121
Other intangible assets, net	261,208	255,962
Goodwill at December 28, 2019	277,600
Goodwill at October 3, 2020	328,425
Impairment of WWS trade name	(8,000)
NewSouth [Member]
Indefinite-lived Intangible Assets [Line Items]
Increase related to the acquisition of NewSouth	50,825
Trade Name [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	140,841	148,841
Impairment of WWS trade name	(8,000)
Customer Relationships and Customer-related Assets [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	$ 201,547	200,647
Customer Relationships and Customer-related Assets [Member] | Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	1 year
Customer Relationships and Customer-related Assets [Member] | Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	10 years
Trade Name [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	$ 22,200
Initial Useful Life (in years)	15 years
Developed Technology [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	$ 5,600	3,000
Developed Technology [Member] | Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	6 years
Developed Technology [Member] | Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	10 years
Noncompete Agreements [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	$ 3,338	1,668
Noncompete Agreements [Member] | Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	2 years
Noncompete Agreements [Member] | Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	5 years
Software License [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	$ 590	$ 590
Initial Useful Life (in years)	2 years

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Estimated Amortization for Future Fiscal Year (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 28, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of 2020	$ 4,729
2021	17,641
2022	16,782
2023	14,621
2024	14,575
Thereafter	52,019
Subtotal	$ 120,367	$ 107,121

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 03, 2020	Jul. 04, 2020	Apr. 04, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Indefinite-lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 4,700			$ 3,900	$ 14,100	$ 12,000
Impairment of trade name					8,000
Trade Name [Member]
Indefinite-lived Intangible Assets [Line Items]
Impairment of trade name					$ 8,000
COVID-19 [Member] | Western Window Systems [Member]
Indefinite-lived Intangible Assets [Line Items]
Percentage of increase (decrease) in net sales	(4.60%)	(19.30%)	14.00%
Percentage of estimated fair value in excess of carrying value	10.00%				10.00%
COVID-19 [Member] | Trade Name [Member]
Indefinite-lived Intangible Assets [Line Items]
Impairment of trade name		$ 8,000

Long Term Debt - Schedule of Lo

Long Term Debt - Schedule of Long-term Debt (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 28, 2019
Debt Instrument [Line Items]
Long-term debt	$ 419,000	$ 379,000
Fees, costs, discount and premium	(7,183)	(10,029)
Long-term debt, net	411,817	368,971
2016 Credit Agreement due 2022, Maturing in October 2022 [Member]
Debt Instrument [Line Items]
Long-term debt	54,000	64,000
2018 Senior Notes due 2026, Maturing in August 2026 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 365,000	$ 315,000

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($)

Feb. 01, 2020

Jan. 24, 2020

Oct. 31, 2019

Sep. 18, 2018

Aug. 10, 2018

Mar. 16, 2018

Feb. 16, 2016

Feb. 29, 2016

Oct. 03, 2020

Oct. 03, 2020

Dec. 28, 2019

Oct. 03, 2020

Line of Credit Facility [Line Items]

Cash payment to acquire business

$ 90,368,000

Face value of Debt Outstanding

$ 419,000,000

$ 419,000,000

$ 379,000,000

$ 419,000,000

Letters of credit outstanding

4,000,000

4,000,000

4,000,000

Fees and cost

7,183,000

7,183,000

7,183,000

Common stock , gross proceeds

$ 161,000,000

Common stock underwriting fee , per share

$ 1.15

Proceeds from issuance of common stock

$ 153,000,000

Underwritten Public Offering [Member]

Line of Credit Facility [Line Items]

Common stock , issued

7,000,000

Common stock, price per share

$ 23

2016 Credit Agreement due 2022 [Member]

Line of Credit Facility [Line Items]

Face value of Debt Outstanding

54,000,000

54,000,000

$ 64,000,000

54,000,000

Accrued interest

$ 70,000

Credit agreement date

Feb. 16, 2016

Total barrowings after making prepayments during period

$ 10,000,000

Prepayment of term loan

$ 214,000,000

Credit agreement inception year month

2016-02

Credit facility maturity date

Oct. 31, 2022

2016 Credit Agreement due 2022 [Member] | 2018 Equity Issuance [Member]

Line of Credit Facility [Line Items]

Outstanding Borrowing

$ 162,000,000

Senior Secured Credit Facilities [Member]

Line of Credit Facility [Line Items]

Amount available under credit facility

$ 310,000,000

Term Loan Facility [Member]

Line of Credit Facility [Line Items]

Amount available under credit facility

$ 270,000,000

Maturity term of credit agreement

6 years

Credit facility amortization percentage

1.00%

Weighted average interest rate

2.17%

2.17%

3.77%

2.17%

Revolving Credit Facility [Member]

Line of Credit Facility [Line Items]

Amount available under credit facility

$ 40,000,000

Revolving Credit Facility [Member] | Maximum [Member]

Line of Credit Facility [Line Items]

Credit facility amortization percentage

0.35%

Revolving Credit Facility [Member] | Minimum [Member]

Line of Credit Facility [Line Items]

Credit facility amortization percentage

0.25%

Second Amendment [Member]

Line of Credit Facility [Line Items]

Interest rate terms

The Second Amendment, among other things, decreases the applicable interest rate margins for the Initial Term Loans (as defined in the 2016 Credit Agreement due 2022) from (i) 3.75% to 2.50%, in the case of the Base Rate Loans (as defined in the 2016 Credit Agreement due 2022), and (ii) 4.75% to 3.50%, in the case of the Eurodollar Loans (as defined in the 2016 Credit Agreement due 2022).

Second Amendment [Member] | Base Rate [Member]

Line of Credit Facility [Line Items]

Basis spread on LIBOR

2.50%

3.75%

Second Amendment [Member] | Euro Dollar [Member]

Line of Credit Facility [Line Items]

Basis spread on LIBOR

3.50%

4.75%

Third Amendment [Member]

Line of Credit Facility [Line Items]

Face value of Debt Outstanding

$ 64,000,000

Interest rate terms

The Third Amendment decreases the applicable interest rate margins for the Initial Term Loan A from (i) 2.50% to a spread of 1.00% to 1.75% based on our first lien net leverage ratio, in the case of the Base Rate Loans (with a floor of 100 basis points), and (ii) 3.50% to a spread ranging from 2.00% to 2.75% based on our first lien leverage ratio, in the case of the Eurodollar Loans (with a floor of zero basis points).

Term of credit facility

3 years

Fees and cost

$ 900,000

Expected written-off of deferred financing costs

$ 1,500,000

Maximum net leverage ratio

400.00%

Maximum net leverage ratio thereafter

450.00%

Current first lien net leverage ratio description

We have not been required to test our first lien net leverage ratio because we have not exceeded 35% of our revolving capacity.

Third Amendment [Member] | Letter of Credit [Member]

Line of Credit Facility [Line Items]

Excluded unused borrowing capacity from financial covenant leverage

$ 7,500,000

$ 7,500,000

$ 7,500,000

Cash collateralized percentage for borrowings excluded from financial covenant leverage

103.00%

Third Amendment [Member] | Base Rate [Member]

Line of Credit Facility [Line Items]

Basis spread on LIBOR

2.50%

Basis points, floor

1.00%

Third Amendment [Member] | Base Rate [Member] | Maximum [Member]

Line of Credit Facility [Line Items]

Basis spread on LIBOR

1.75%

Third Amendment [Member] | Base Rate [Member] | Minimum [Member]

Line of Credit Facility [Line Items]

Basis spread on LIBOR

1.00%

Third Amendment [Member] | Euro Dollar [Member]

Line of Credit Facility [Line Items]

Basis spread on LIBOR

3.50%

Basis points, floor

0.00%

Third Amendment [Member] | Euro Dollar [Member] | Maximum [Member]

Line of Credit Facility [Line Items]

Basis spread on LIBOR

2.75%

Third Amendment [Member] | Euro Dollar [Member] | Minimum [Member]

Line of Credit Facility [Line Items]

Basis spread on LIBOR

2.00%

Revolving Credit Facility due 2024 [Member]

Line of Credit Facility [Line Items]

Face value of Debt Outstanding

40,000,000

$ 40,000,000

40,000,000

Term of credit facility

5 years

Credit available under the credit facility

76,000,000

76,000,000

76,000,000

Revolving Credit Facility due 2024 [Member] | Maximum [Member]

Line of Credit Facility [Line Items]

Face value of Debt Outstanding

$ 80,000,000

2018 Senior Notes due 2026 [Member]

Line of Credit Facility [Line Items]

Long-term debt

$ 50,000,000

$ 315,000,000

Accrued Interest rate

6.75%

6.75%

Percentage of Principal Amount Redeemed

106.375%

100.00%

Debt instrument, premium

$ 3,200,000

Debt instrument, maturity date

Aug. 10, 2026

Face value of Debt Outstanding

$ 365,000,000

365,000,000

$ 365,000,000

Accrued interest

$ 4,300,000

Financing Costs

1,300,000

$ 10,400,000

Repurchase notes percentage of aggregate principal amount

101.00%

101.00%

101.00%

2018 Senior Notes due 2026 [Member] | NewSouth Window Solutions [Member] | Cash On Hand [Member]

Line of Credit Facility [Line Items]

Cash payment to acquire business

$ 90,400,000

Long-Term Debt - Activity Relat

Long-Term Debt - Activity Relating to Third-Party Fees and Costs, Lender Fees and Discount (Detail) $ in Thousands	9 Months Ended
	Oct. 03, 2020USD ($)
Debt Instrument [Line Items]
At beginning of year	$ 10,029
Add: Deferred financing costs from the issuance of the add-on 2018 Senior Notes due 2026	1,266
At end of period	7,183
2016 Credit Agreement due 2022 [Member]
Debt Instrument [Line Items]
Less: Amortization expense	(265)
2018 Senior Notes Due 2026 [Member]
Debt Instrument [Line Items]
Add: Deferred financing costs from the issuance of the add-on 2018 Senior Notes due 2026	1,266
Less: Premium on the issuance of the add-on 2018 Senior Notes due 2026	(3,187)
Less: Amortization expense	$ (660)

Long-Term Debt - Estimated Amor

Long-Term Debt - Estimated Amortization Expense Relating to Third-Party Fees and Costs, Lender Fees and Discount (Detail) $ in Thousands	Oct. 03, 2020USD ($)
Debt Disclosure [Abstract]
Remainder of 2020	$ 281
2021	1,169
2022	1,223
2023	1,183
2024	1,250
Thereafter	2,077
Total	$ 7,183

Long-Term Debt - Contractual Fu

Long-Term Debt - Contractual Future Maturities of Long-Term Debt Outstanding, Including Remaining Balance of Financing Arrangement Described as Other Debt (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 28, 2019
Debt Disclosure [Abstract]
Remainder of 2020	$ 0
2021	0
2022	54,000
2023	0
2024	0
Thereafter	365,000
Total	$ 419,000	$ 379,000

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019	Dec. 28, 2019	Feb. 01, 2020
Lessee Lease Description [Line Items]
Operating lease existence of option to extend			true
Operating lease extension period			5 years
Operating lease existence of option to terminate			true
Operating lease not yet commenced description			no additional operating or finance leases that have not yet commenced
Finance lease not yet commenced description			no additional operating or finance leases that have not yet commenced
Lease expenses	$ 3,300	$ 2,300	$ 9,300	$ 6,600	$ 8,900
Operating lease right-of-use assets obtained in exchange for operating lease obligations	3,079		17,917
Operating lease right-of-use asset						$ 10,578
New South Window Solutions LLC and New South Window Solutions of Orlando LLC [Member]
Lessee Lease Description [Line Items]
Operating lease right-of-use asset	10,600		10,600
Cost of Sales [Member]
Lessee Lease Description [Line Items]
Lease expenses	$ 1,600	$ 1,000	$ 4,700	$ 3,000
Minimum [Member]
Lessee Lease Description [Line Items]
Operating lease term	1 year		1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Operating lease term	9 years		9 years
Operating lease termination period			1 year

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Leases [Abstract]
Operating lease cost	$ 2,364	$ 1,608	$ 6,775	$ 5,058
Variable lease cost	927	652	2,523	1,494
Total lease cost	$ 3,291	$ 2,260	$ 9,298	$ 6,552

Leases - Other Information Rela

Leases - Other Information Relating to Leases (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows relating to operating leases	$ (2,276)	$ (1,546)	$ (6,497)	$ (4,506)
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 3,079		$ 17,917
Weighted average remaining lease term in years
Operating leases	6 years 9 months 21 days	4 years 1 month 17 days	6 years 9 months 21 days	4 years 1 month 17 days
Weighted average discount rate
Operating leases	5.80%	6.20%	5.80%	6.20%

Leases - Future Maturities unde

Leases - Future Maturities under Operating Leases (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 28, 2019
Leases [Abstract]
Remainder of 2020	$ 2,381
2021	8,138
2022	7,305
2023	6,954
2024	6,560
Thereafter	19,604
Total future minimum lease payments	50,942
Less: Imputed interest	(9,033)	$ (7,428)
Operating lease liability - total	41,909	28,743
Current portion of operating lease liability	6,396	4,703
Operating lease liability, less current portion	$ 35,513	24,040
Remainder of 2020		6,319
2021		4,771
2022		3,878
2023		3,741
2024		3,771
Thereafter		13,691
Total future minimum lease payments		$ 36,171

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	Dec. 22, 2017	Oct. 03, 2020	Jul. 04, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Income Taxes [Line Items]
Income tax expense		$ 5,680,000		$ 3,873,000	$ 9,351,000	$ 11,271,000
Effective tax rates	25.00%	24.70%		20.40%	21.00%	21.80%
Income tax expense, discrete item		$ 0		$ 665,000	$ 737,000	$ 1,700,000
Refunds of state income taxes					553,000
Refunds of tax cuts and Jobs Act, income taxes					$ 700,000
Effective tax rates, excluding discrete item		24.70%		24.80%	24.60%	25.30%
Payment of estimated federal and state income taxes		$ 4,000,000	$ 0	$ 4,300,000		$ 10,800,000
Federal And State Research And Development Tax Credit [Member]
Income Taxes [Line Items]
Tax credit true-ups to actual from assumptions		$ 319,000		$ 146,000		$ 146,000

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019	Dec. 28, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of assets, level 2 to level 3 transfers	$ 0	$ 0	$ 0	$ 0
Principal outstanding value	419,000,000		419,000,000		$ 379,000,000
2016 Credit Agreement [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of current long-term debt	54,000,000		54,000,000		64,000,000
Principal outstanding value	54,000,000		54,000,000		64,000,000
2018 Senior Notes Due 2026 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of current long-term debt	390,100,000		390,100,000		338,600,000
Principal outstanding value	$ 365,000,000		$ 365,000,000		$ 315,000,000

Fair Value - Schedule of Fair V

Fair Value - Schedule of Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 28, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets (Liabilities)	$ 300	$ (317)
Aluminum Forward Contracts [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets (Liabilities)	330	(317)
MTP Contracts [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets (Liabilities)	(30)
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets (Liabilities)	300	(317)
Significant Other Observable Inputs (Level 2) [Member] | Aluminum Forward Contracts [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets (Liabilities)	330	$ (317)
Significant Other Observable Inputs (Level 2) [Member] | MTP Contracts [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets (Liabilities)	$ (30)

Derivatives - Additional Inform

Derivatives - Additional Information (Detail) $ in Thousands, lb in Millions	9 Months Ended
	Oct. 03, 2020USD ($)ForwardContractlb$ / lb	Dec. 28, 2019USD ($)
Derivative [Line Items]
Derivative assets, net	$ 686	$ 193
Derivative liabilities, net	386	510
Fair Value of Derivative	$ 200
MTP Contracts [Member]
Derivative [Line Items]
Typical order quantities payment terms net	30 days
Derivative liabilities, net	$ 30
Number of outstanding forward contracts | ForwardContract	14
Derivative, amount of hedged item | lb	31.5
Derivative average price | $ / lb	0.12
Maturity period of contract, minimum	1 month
Maturity period of contract, maximum	15 months
Aluminum Contracts [Member]
Derivative [Line Items]
Derivative assets, net	$ 300
Number of outstanding forward contracts | ForwardContract	28
Derivative, amount of hedged item | lb	34.6
Derivative average price | $ / lb	0.80
Maturity period of contract, minimum	1 month
Maturity period of contract, maximum	15 months
Aluminum Contracts and MTP Contracts [Member]
Derivative [Line Items]
Accumulated other comprehensive income (losses), net of tax	$ 200	$ (200)

Derivatives - Summary of Fair V

Derivatives - Summary of Fair Values of Hedges and MTP Contracts (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 28, 2019
Derivative Instruments And Hedging Activities [Line Items]
Total derivative instruments Assets	$ 686	$ 193
Total derivative instruments Liabilities	(386)	(510)
Aluminum Forward Contracts [Member] | Other Current Assets [Member]
Derivative Instruments And Hedging Activities [Line Items]
Total derivative instruments Assets	429	193
Aluminum Forward Contracts [Member] | Other Assets [Member]
Derivative Instruments And Hedging Activities [Line Items]
Total derivative instruments Assets	136
Aluminum Forward Contracts [Member] | Accrued Liabilities [Member]
Derivative Instruments And Hedging Activities [Line Items]
Total derivative instruments Liabilities	(233)	$ (510)
Aluminum Forward Contracts [Member] | Other Liabilities [Member]
Derivative Instruments And Hedging Activities [Line Items]
Total derivative instruments Liabilities	(2)
MTP Contracts [Member] | Other Current Assets [Member]
Derivative Instruments And Hedging Activities [Line Items]
Total derivative instruments Assets	93
MTP Contracts [Member] | Other Assets [Member]
Derivative Instruments And Hedging Activities [Line Items]
Total derivative instruments Assets	28
MTP Contracts [Member] | Accrued Liabilities [Member]
Derivative Instruments And Hedging Activities [Line Items]
Total derivative instruments Liabilities	(113)
MTP Contracts [Member] | Other Liabilities [Member]
Derivative Instruments And Hedging Activities [Line Items]
Total derivative instruments Liabilities	$ (38)

Derivatives - Gains (Losses) on

Derivatives - Gains (Losses) on Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI(L) on Derivatives	$ 1,563	$ (1,136)	$ (2,120)	$ (2,083)
Aluminum Contracts [Member] | Inventory Classified as Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI(L) on Derivatives	1,452	(1,136)	(2,152)	(2,083)
Amount of Gain or (Loss) Reclassified from Accumulated OCI(L) into Income	(680)	$ (1,532)	(2,798)	$ (3,670)
MTP Contracts [Member] | Inventory Classified as Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI(L) on Derivatives	111		32
Amount of Gain or (Loss) Reclassified from Accumulated OCI(L) into Income	$ 148		$ 61

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 451,010	$ 414,375	$ 431,548	$ 385,544
Change in fair value of derivatives	1,563	(1,136)	(2,120)	(2,083)
Amounts reclassified from other comprehensive loss	532	1,532	2,737	3,670
Tax effect	(524)	(102)	(154)	(406)
Other comprehensive income, net of tax	1,571	294	463	1,181
Ending Balance	471,354	425,632	471,354	425,632
Accumulated Other Comprehensive Income (Loss) [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,346)	(2,178)	(238)	(3,065)
Other comprehensive income, net of tax	1,571	294	463	1,181
Ending Balance	225	(1,884)	225	(1,884)
Aluminum Forward Contracts [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in fair value of derivatives	1,452	(1,136)	(2,152)	(2,083)
Amounts reclassified from other comprehensive loss	680	1,532	2,798	3,670
Tax effect	(533)	(102)	(161)	(406)
Other comprehensive income, net of tax	1,599	294	485	1,181
Aluminum Forward Contracts [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,352)	(2,178)	(238)	(3,065)
Ending Balance	247	$ (1,884)	247	$ (1,884)
MTP Contracts [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in fair value of derivatives	111		32
Amounts reclassified from other comprehensive loss	(148)		(61)
Tax effect	9		7
Other comprehensive income, net of tax	(28)		(22)
MTP Contracts [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	6
Ending Balance	$ (22)		$ (22)

Segments - Additional Informati

Segments - Additional Information (Detail)	9 Months Ended
	Oct. 03, 2020Segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segments - Summary of Financial

Segments - Summary of Financial Data Attributable to Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Net sales:
Total net sales	$ 238,033	$ 197,823	$ 661,020	$ 570,130
Income (loss) from operations:
Total income from operations	29,956	25,431	65,451	71,601
Impairment of trade name			(8,000)
Restructuring costs and charges	(321)		(4,227)
Interest expense, net	6,954	6,452	20,979	19,922
Total income before income taxes	23,002	18,979	44,472	51,679
Trade Name [Member]
Income (loss) from operations:
Impairment of trade name			(8,000)
Southeast Segment [Member]
Net sales:
Total net sales	203,741	161,892	560,241	465,051
Income (loss) from operations:
Total income from operations	25,739	22,410	70,277	62,892
Restructuring costs and charges	(321,000)		(4,200)
Western Segment [Member]
Net sales:
Total net sales	34,292	35,931	100,779	105,079
Income (loss) from operations:
Total income from operations	$ 4,538	$ 3,021	$ 7,401	$ 8,709

Segments - Summary of Financi_2

Segments - Summary of Financial Data Attributable to Operating Segments (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 03, 2020	Oct. 03, 2020
Segment Reporting Information [Line Items]
Impairment of trade name		$ 8,000
Restructuring costs and charges	$ 321	4,227
Trade Name [Member]
Segment Reporting Information [Line Items]
Impairment of trade name		8,000
Southeast Segment [Member]
Segment Reporting Information [Line Items]
Restructuring costs and charges	$ 321,000	$ 4,200

Restructuring Costs and Charg_3

Restructuring Costs and Charges - Additional Information (Detail) - USD ($) $ in Thousands	Apr. 20, 2020	Oct. 03, 2020	Oct. 03, 2020
Restructuring Cost And Reserve [Line Items]
Restructuring costs and charges		$ 321	$ 4,227
Manufacturing Facility Closing [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and related activities, Description	on April 20, 2020, the Company’s management approved a plan to consolidate its manufacturing operations in Florida, which included exiting our manufacturing facility in Orlando, Florida, where our WinDoor and Eze-Breeze products were assembled, and relocate the manufacturing of those products to the our Venice and Tampa, Florida plants, respectively.
Restructuring and related activities, initiation date	Apr. 20, 2020
Restructuring and related activities, completion date	Jun. 30, 2020
Restructuring costs and charges			$ 4,200

Restructuring Costs and Charg_4

Restructuring Costs and Charges - Summary of Restructuring Costs and Charges (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 03, 2020	Oct. 03, 2020
Restructuring Cost And Reserve [Line Items]
Restructuring costs and charges, Charged to Expense	$ 321	$ 4,227
Restructuring costs and charges, Write-offs of Assets		(2,442)
Restructuring costs and charges, Settled in Cash		(1,785)
Property, Plant and Equipment Costs and Charges [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring costs and charges, Charged to Expense		1,284
Restructuring costs and charges, Write-offs of Assets		(540)
Restructuring costs and charges, Settled in Cash		(744)
Impairment of Operating Lease Right-of-Use Asset [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring costs and charges, Charged to Expense		639
Restructuring costs and charges, Write-offs of Assets		(639)
Inventory Charges [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring costs and charges, Charged to Expense		1,164
Restructuring costs and charges, Write-offs of Assets		(1,263)
Restructuring costs and charges, Settled in Cash		99
Personnel-Related Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring costs and charges, Charged to Expense		1,140
Restructuring costs and charges, Settled in Cash		$ (1,140)