Summary of Significant Accounting Policies - Segment (Details) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 28, 2017
USD ($)
|
Sep. 28, 2017
USD ($)
|
Jun. 29, 2017
USD ($)
|
Mar. 30, 2017
USD ($)
|
Dec. 29, 2016
USD ($)
|
Sep. 29, 2016
USD ($)
|
Jun. 30, 2016
USD ($)
|
Mar. 31, 2016
USD ($)
|
Dec. 28, 2017
USD ($)
segment
|
Dec. 29, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Revenue from External Customer [Line Items] | |||||||||||
| Number of reportable segments | segment | 1 | ||||||||||
| Net sales | $ 389,501 | $ 343,923 | $ 344,047 | $ 307,296 | $ 278,294 | $ 271,311 | $ 265,853 | $ 235,301 | $ 1,384,767 | $ 1,050,759 | $ 784,012 |
| Net sales (as a percentage) | 100.00% | 100.00% | 100.00% | ||||||||
| Tile | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Net sales | $ 419,745 | $ 325,433 | $ 244,902 | ||||||||
| Net sales (as a percentage) | 30.00% | 31.00% | 31.00% | ||||||||
| Decorative Accessories | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Net sales | $ 257,684 | $ 188,371 | $ 138,442 | ||||||||
| Net sales (as a percentage) | 19.00% | 18.00% | 18.00% | ||||||||
| Accessories Installation Materials and Tools | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Net sales | $ 217,427 | $ 165,330 | $ 124,162 | ||||||||
| Net sales (as a percentage) | 16.00% | 16.00% | 16.00% | ||||||||
| Laminate Luxury Vinyl Plank | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Net sales | $ 208,238 | $ 131,447 | $ 77,586 | ||||||||
| Net sales (as a percentage) | 15.00% | 12.00% | 10.00% | ||||||||
| Wood | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Net sales | $ 167,152 | $ 142,751 | $ 116,999 | ||||||||
| Net sales (as a percentage) | 12.00% | 14.00% | 15.00% | ||||||||
| Natural Stone | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Net sales | $ 104,670 | $ 90,866 | $ 78,294 | ||||||||
| Net sales (as a percentage) | 8.00% | 9.00% | 10.00% | ||||||||
| Delivery and Other | |||||||||||
| Revenue from External Customer [Line Items] | |||||||||||
| Net sales | $ 9,851 | $ 6,561 | $ 3,627 | ||||||||