Summary of Significant Accounting Policies - Narrative (Details)		12 Months Ended
	Aug. 07, 2018 USD ($)	Dec. 29, 2019 USD ($) Segment shares	Dec. 30, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares
Summary of Significant Accounting Policies [Line Items]
Percent of warranty claims to revenue (less than) (percentage)		0.50%	0.30%	0.30%
Percentage of installation projects completed in less than five days (percent)		0.90
Research and development expense		$ 17,800,000	$ 16,400,000	$ 14,000,000.0
Cash equivalents		0	0
Short-term investments			0
Interest paid		22,700,000	13,800,000	6,300,000
Income taxes paid		34,800,000	29,500,000	19,100,000
Proceeds from income tax refunds		1,900,000	800,000	100,000
Interest costs capitalized		2,100,000	700,000	600,000
Depreciation		41,500,000	37,600,000	29,500,000
Accumulated amortization of goodwill			77,300,000
Accumulated impairment losses recognized			212,600,000
Goodwill		257,439,000	245,815,000	68,754,000
Purchase price accounting adjustments		$ 17,181,000	1,377,000
Number of operating segments | Segment		3
Other intangible assets		$ 89,100,000	97,700,000
Amortization of intangible assets		$ 5,903,000	5,387,000	0
Patent defense costs			0	0
Fair value estimates of reporting units, threshold for no goodwill impairment, percent of decrease in fair value estimates		10.00%
Workmanship warranty period		1 year
Warranty and sales allowance reserves		$ 3,900,000	3,500,000
Foreign exchange translation gains (losses)		$ (11,652,000)	$ (22,544,000)	$ 31,579,000
Share-based compensation, options granted (in shares) | shares		0	0	0
Nora
Summary of Significant Accounting Policies [Line Items]
Goodwill	$ 201,906,000	$ 192,700,000
Intangible assets acquired	103,300,000	89,100,000
Purchase price accounting adjustments	18,600,000
Goodwill expected to be deductible for income tax purposes	$ 0	0
Amortization of intangible assets		$ 5,900,000	$ 5,400,000	$ 700,000
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%	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%	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
Cost of Sales
Summary of Significant Accounting Policies [Line Items]
Depreciation		$ 26,300,000	$ 21,800,000	14,800,000
Selling, General and Administrative Expenses
Summary of Significant Accounting Policies [Line Items]
Depreciation		$ 15,200,000	$ 15,800,000	$ 14,700,000