Revenue from Contracts with Customers - Revenue (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 27, 2020 |
Jun. 29, 2019 |
Jun. 27, 2020 |
Jun. 29, 2019 |
|
| Disaggregation of Revenue [Line Items] | ||||
| Total revenues | $ 119,023 | $ 100,304 | $ 220,705 | $ 189,654 |
| United States | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Total revenues | 108,198 | 85,837 | 196,248 | 161,622 |
| Canada | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Total revenues | 2,868 | 3,317 | 6,989 | 6,732 |
| Middle East | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Total revenues | 2,330 | 5,949 | 4,631 | 9,700 |
| Caribbean | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Total revenues | 2,310 | 501 | 5,873 | 2,767 |
| Europe | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Total revenues | 2,110 | 2,471 | 4,482 | 4,910 |
| Other | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Total revenues | $ 1,207 | $ 2,229 | $ 2,482 | $ 3,923 |