Goodwill and intangible assets Intangible Assets (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jun. 27, 2020 |
Jan. 02, 2021 |
|
| Finite-Lived Intangible Assets [Line Items] | ||
| Acquired amount | $ 406,276 | $ 440,932 |
| Accumulated Amortization | (340,839) | (402,120) |
| Net Book Value | 65,437 | 38,812 |
| Intangible asset impairment | 17,473 | |
| Customer related | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Acquired amount | 300,937 | 325,799 |
| Accumulated Amortization | (266,759) | (312,345) |
| Net Book Value | 34,178 | 13,454 |
| Trade name | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Acquired amount | 51,698 | 56,716 |
| Accumulated Amortization | (32,493) | (40,161) |
| Net Book Value | 19,205 | 16,555 |
| Technology and other | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Acquired amount | 53,641 | 58,417 |
| Accumulated Amortization | (41,587) | (49,614) |
| Net Book Value | $ 12,054 | $ 8,803 |