Long-Term Debt - Additional Information (Detail) - USD ($)							1 Months Ended	3 Months Ended	12 Months Ended			59 Months Ended
	Jan. 24, 2020	Oct. 31, 2019	Dec. 19, 2018	Aug. 10, 2018	Mar. 16, 2018	Feb. 16, 2016	Feb. 29, 2016	Oct. 03, 2020	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018	Jan. 02, 2021	Sep. 18, 2018
Line of Credit Facility [Line Items]
Face value of debt outstanding									$ 419,000,000	$ 379,000,000		$ 419,000,000
Letters of credit outstanding									4,000,000.0			4,000,000.0
Fees and cost									6,902,000			6,902,000
2016 Credit Agreement Due 2022 [Member]
Line of Credit Facility [Line Items]
Face value of debt outstanding									54,000,000.0			54,000,000.0
Accrued interest									$ 12,000
Credit agreement date									Feb. 16, 2016
Total barrowings after making prepayments during period								$ 10,000,000.0
Accelerated amortization relating to prepayment under the 2016 Credit Agreement											$ (5,600,000)
Prepayment of term loan												$ 214,000,000.0
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											$ 8,000,000.0		$ 152,000,000.0
Repayment of credit facility			$ 8,000,000.0
Senior Secured Credit Facilities [Member]
Line of Credit Facility [Line Items]
Amount available under credit facility						$ 310,000,000.0
Term Loan Facility [Member]
Line of Credit Facility [Line Items]
Amount available under credit facility						$ 270,000,000.0
Maturity term of credit agreement						6 years
Credit facility amortization percentage						1.00%
Weighted average interest rate									2.15%	3.77%		2.15%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Amount available under credit facility						$ 40,000,000.0
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		$ 64,000,000.0
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
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									$ 40,000,000.0			40,000,000.0
Term of credit facility		5 years
Credit available under the credit facility									$ 76,000,000.0			76,000,000.0
Revolving Credit Facility due 2024 [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Face value of debt outstanding		$ 80,000,000.0
2018 Senior Notes Due 2026 [Member]
Line of Credit Facility [Line Items]
Long-term debt	$ 50,000,000.0			$ 315,000,000.0
Accrued Interest rate	6.75%			6.75%					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									$ 365,000,000.0			$ 365,000,000.0
Accrued interest									$ 10,400,000
Financing Costs	1,300,000			$ 10,400,000
Repurchase notes percentage of aggregate principal amount									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