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Goodwill and Intangible Assets (Tables)
12 Months Ended
Dec. 28, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Changes in the carrying amount of goodwill of each of the Company’s reportable segments were as follows (in thousands):
U.S. Gas
Canadian Operations(1)
Union Electric (2)
Non-Union ElectricTotal
Balances as of December 31, 2023$58,160 $93,911 $56,499 $167,322 $375,892 
Effect of exchange rate changes— (7,590)— — (7,590)
Balances as of December 29, 2024$58,160 $86,321 $56,499 $167,322 $368,302 
Effect of exchange rate changes
— 4,842 — — 4,842 
Addition from Connect acquisition— 22,527 — — 22,527 
Balances as of December 28, 2025$58,160 $113,690 $56,499 $167,322 $395,671 
(1)Net of accumulated impairment of $10.8 million as of December 28, 2025, December 29, 2024 and December 31, 2023.
(2)Net of accumulated impairment of $391.1 million as of December 28, 2025, December 29, 2024 and December 31, 2023.
Schedule of Finite-Lived Intangible Assets
The Company’s definite-lived intangible assets and respective carrying values were as follows (in thousands, except for weighted average amortization periods, which are in years):

December 28, 2025
Weighted
Average
Amortization
Period
Gross
Carrying
Amount
Accumulated
Amortization
Net
Carrying
Amount
Customer relationships19$414,808 $(127,463)$287,345 
Trade names and trademarks1582,057 (28,227)53,830 
Backlog0.82,481 (413)2,068 
Total intangible assets18$499,346 $(156,103)$343,243 
December 29, 2024
Weighted
Average
Amortization
Period
Gross
Carrying
Amount
Accumulated
Amortization
Net
Carrying
Amount
Customer relationships19$389,918 $(105,218)$284,700 
Trade names and trademarks1578,955 (22,754)56,201 
Total intangible assets18$468,873 $(127,972)$340,901 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
The estimated future aggregate amortization expense of definite-lived intangible assets as of December 28, 2025 is as follows (in thousands):
Fiscal years ended:
2026$29,942
202727,510 
202827,193 
202927,193 
203026,834 
Thereafter204,571 
Total$343,243