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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 26, 2024	Jan. 27, 2024
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 507,602	$ 367,542
Accumulated Amortization	279,933	258,588
Intangible Assets, Net	227,669	108,954
UtiliQuest
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	4,700	4,700
Accumulated Amortization	0	0
Intangible Assets, Net	$ 4,700	4,700
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Useful life	9 years 10 months 24 days
Intangible Assets, Gross (Excluding Goodwill)	$ 451,117	338,117
Accumulated Amortization	262,250	245,512
Intangible Assets, Net	$ 188,867	92,605
Trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Useful life	8 years 7 months 6 days
Intangible Assets, Gross (Excluding Goodwill)	$ 14,080	13,050
Accumulated Amortization	9,146	8,723
Intangible Assets, Net	$ 4,934	4,327
Backlog intangibles
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Useful life	1 year 9 months 18 days
Intangible Assets, Gross (Excluding Goodwill)	$ 37,630	11,600
Accumulated Amortization	8,507	4,335
Intangible Assets, Net	$ 29,123	7,265
Non-compete agreements
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Useful life	3 years
Intangible Assets, Gross (Excluding Goodwill)	$ 75	75
Accumulated Amortization	30	18
Intangible Assets, Net	$ 45	$ 57

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Finite-Lived and Indefinite-Lived Intangible Assets

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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