Revenue - Revenue by Customer (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 03, 2020 |
Mar. 29, 2019 |
|
| Disaggregation of Revenue [Line Items] | ||
| Total revenue | $ 351,734 | $ 325,906 |
| Army | ||
| Disaggregation of Revenue [Line Items] | ||
| Total revenue | 247,555 | 226,692 |
| Air Force | ||
| Disaggregation of Revenue [Line Items] | ||
| Total revenue | 73,341 | 67,931 |
| Navy | ||
| Disaggregation of Revenue [Line Items] | ||
| Total revenue | 15,237 | 15,088 |
| Other | ||
| Disaggregation of Revenue [Line Items] | ||
| Total revenue | $ 15,601 | $ 16,195 |