Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Apr. 05, 2020	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Summary of Significant Accounting Policies [Line Items]
Payment terms for revenue from contract with customer		60 days
Percent of warranty claims to revenue (less than) (percentage)		0.50%	0.50%	0.50%
Percentage of installation projects completed in less than five days (percent)		85.00%
Research and development expense		$ 18,600,000	$ 17,800,000	$ 16,400,000
Cash equivalents		0	0
Short-term investments		0	0
Interest paid		32,000,000.0	22,700,000	13,800,000
Cash paid for termination of derivative		12,500,000
Income taxes paid		19,300,000	34,800,000	29,500,000
Proceeds from income tax refunds		7,500,000	1,900,000	800,000
Interest costs capitalized		1,900,000	2,100,000	700,000
Depreciation expense		$ 42,400,000	41,500,000	37,600,000
Workmanship warranty period		1 year
Warranty and sales allowance reserves		$ 3,200,000	3,900,000
Foreign exchange translation gains (losses)		$ 52,808,000	$ (11,652,000)	$ (22,544,000)
Share-based compensation, options granted (in shares)		0	0	0
Building and Improvements | Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		10 years
Building and Improvements | Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		40 years
Furniture and Equipment | Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		3 years
Furniture and Equipment | Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life		12 years
Carpet, Modular Resilient Flooring, and Related Products
Summary of Significant Accounting Policies [Line Items]
Percent of revenue due to contracts with customers (percentage)		98.00%	98.00%	97.00%
Installation of Carpet and Other Flooring Related Material
Summary of Significant Accounting Policies [Line Items]
Percent of revenue due to contracts with customers (percentage)		2.00%	2.00%	3.00%
Carpet Products | Minimum
Summary of Significant Accounting Policies [Line Items]
Product warranty period		10 years
Carpet Products | Maximum
Summary of Significant Accounting Policies [Line Items]
Product warranty period		20 years
Luxury Vinyl Tile Products | Minimum
Summary of Significant Accounting Policies [Line Items]
Product warranty period		5 years
Luxury Vinyl Tile Products | Maximum
Summary of Significant Accounting Policies [Line Items]
Product warranty period		15 years
Forfeiture of Share Based Compensation
Summary of Significant Accounting Policies [Line Items]
Adoption of new accounting standard - share-based payment awards	$ 1,400,000	$ 1,400,000