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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jan. 25, 2020 | Jan. 26, 2019
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 327,267 | $ 327,267
Accumulated Amortization | 187,322 | 166,142
Intangible Assets, Net | 139,945 | 161,125
UtiliQuest |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 4,700 | 4,700
Intangible Assets, Net | $ 4,700 | 4,700
Customer relationships |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Remaining Useful Lives (Years) | 10 years 2 months 12 days |
Gross Carrying Amount | $ 312,017 | 312,017
Accumulated Amortization | 178,411 | 157,691
Intangible Assets, Net | $ 133,606 | 154,326
Trade names |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Remaining Useful Lives (Years) | 7 years 10 months 24 days |
Gross Carrying Amount | $ 10,350 | 10,350
Accumulated Amortization | 8,732 | 8,312
Intangible Assets, Net | $ 1,618 | 2,038
Non-compete agreements |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |
Weighted Average Remaining Useful Lives (Years) | 15 days |
Gross Carrying Amount | $ 200 | 200
Accumulated Amortization | 179 | 139
Intangible Assets, Net | $ 21 | $ 61

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition 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 No definition available. + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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