Goodwill (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 29, 2026 |
Dec. 28, 2025 |
|
| Goodwill [Roll Forward] | ||
| Goodwill, beginning balance | $ 395,671 | |
| Effect of exchange rate changes | (1,901) | |
| Goodwill, ending balance | 393,770 | |
| U.S. Gas | ||
| Goodwill [Roll Forward] | ||
| Goodwill, beginning balance | 58,160 | |
| Effect of exchange rate changes | 0 | |
| Goodwill, ending balance | 58,160 | |
| Canadian Operations | ||
| Goodwill [Roll Forward] | ||
| Goodwill, beginning balance | 113,690 | |
| Effect of exchange rate changes | (1,901) | |
| Goodwill, ending balance | 111,789 | |
| Accumulated impairment | 10,800 | $ 10,800 |
| Union Electric | ||
| Goodwill [Roll Forward] | ||
| Goodwill, beginning balance | 56,499 | |
| Effect of exchange rate changes | 0 | |
| Goodwill, ending balance | 56,499 | |
| Accumulated impairment | 391,100 | $ 391,100 |
| Non-Union Electric | ||
| Goodwill [Roll Forward] | ||
| Goodwill, beginning balance | 167,322 | |
| Effect of exchange rate changes | 0 | |
| Goodwill, ending balance | $ 167,322 |
| X | ||||||||||
- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of accumulated impairment loss for asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|