Dycom Industries (DY) 10-Q 24 Nov 20 2021 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Oct. 24, 2020	Nov. 23, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 24, 2020
Document Transition Report	false
Entity File Number	001-10613
Entity Registrant Name	DYCOM INDUSTRIES, INC.
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	59-1277135
Entity Address, Address Line One	11780 US Highway 1, Suite 600
Entity Address, City or Town	Palm Beach Gardens,
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33408
City Area Code	561
Local Phone Number	627-7171
Title of 12(b) Security	Common stock, par value $0.33 1/3 per share
Trading Symbol	DY
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		31,913,183
Entity Central Index Key	0000067215
Current Fiscal Year End Date	--01-30
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020
Current assets:
Cash and equivalents	$ 12,036	$ 54,560
Accounts receivable, net	938,941	817,245
Contract assets	204,516	253,005
Inventories	70,827	98,324
Income tax receivable	724	3,168
Other current assets	38,462	31,991
Total current assets	1,265,506	1,258,293
Property and equipment, net	288,292	376,610
Operating lease right-of-use assets	65,912	69,596
Goodwill	272,485	325,749
Intangible assets, net	124,491	139,945
Other assets	48,378	47,438
Total non-current assets	799,558	959,338
Total assets	2,065,064	2,217,631
Current liabilities:
Accounts payable	183,679	119,612
Current portion of debt	78,121	22,500
Contract liabilities	16,412	16,332
Accrued insurance claims	43,623	38,881
Operating lease liabilities	26,075	26,581
Income taxes payable	8,413	344
Other accrued liabilities	107,392	98,775
Total current liabilities	463,715	323,025
Long-term debt	490,000	844,401
Accrued insurance claims - non-current	67,195	56,026
Operating lease liabilities - non-current	40,327	43,606
Deferred tax liabilities, net - non-current	55,360	75,527
Other liabilities	35,343	6,442
Total liabilities	1,151,940	1,349,027
Stockholders’ equity:
Preferred stock, par value $1.00 per share: 1,000,000 shares authorized: no shares issued and outstanding	0	0
Common stock, par value $0.33 1/3 per share: 150,000,000 shares authorized: 31,909,166 and 31,583,938 issued and outstanding, respectively	10,636	10,528
Additional paid-in capital	36,510	30,158
Accumulated other comprehensive loss	(1,782)	(1,781)
Retained earnings	867,760	829,699
Total stockholders’ equity	913,124	868,604
Total liabilities and stockholders’ equity	$ 2,065,064	$ 2,217,631
Common stock, shares outstanding	31,909,166	31,583,938
Common stock, authorized (in shares)	150,000,000	150,000,000

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Oct. 24, 2020	Jan. 25, 2020
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred Stock, Shares Authorized	1,000,000	1,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.33	$ 0.33
Common stock, authorized (in shares)	150,000,000	150,000,000
Common stock, issued (in shares)	31,909,166	31,583,938
Common stock, shares outstanding	31,909,166	31,583,938

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Income Statement [Abstract]
Contract revenues	$ 810,256	$ 884,115	$ 2,448,500	$ 2,602,079
Costs of earned revenues, excluding depreciation and amortization	658,355	724,378	1,996,514	2,146,527
General and administrative	62,628	69,875	195,871	193,613
Depreciation and amortization	42,313	47,356	132,313	140,941
Goodwill impairment charge			53,264	0
Total	763,296	841,609	2,377,962	2,481,081
Interest expense, net	(4,710)	(13,128)	(25,020)	(38,239)
Gain on debt extinguishment			12,046	0
Other income, net	3,708	1,407	7,921	11,111
Income before income taxes	45,958	30,785	65,485	93,870
Provision for income taxes	12,032	6,556	26,953	25,466
Net income	$ 33,926	$ 24,229	$ 38,532	$ 68,404
Earnings per common share:
Basic earnings per common share (in dollars per share)	$ 1.06	$ 0.77	$ 1.21	$ 2.17
Diluted earnings per common share (in dollars per share)	$ 1.05	$ 0.76	$ 1.20	$ 2.15
Shares used in computing earnings per common share:
Basic (in shares)	31,878,583	31,502,543	31,744,199	31,480,759
Diluted (in shares)	32,425,300	31,826,845	32,106,661	31,811,505

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 33,926	$ 24,229	$ 38,532	$ 68,404
Foreign currency translation gains (losses), net of tax	9	0	(1)	(3)
Comprehensive income	$ 33,935	$ 24,229	$ 38,531	$ 68,401

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period Of Adoption, Adjustment	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period Of Adoption, Adjustment
Beginning balance at Jan. 26, 2019	$ 804,168		$ 10,477	$ 22,489	$ (1,282)	$ 772,484
Beginning balance (shares) at Jan. 26, 2019			31,430,031
Increase (Decrease) in Stockholders' Equity
Stock options exercised	313		$ 9	304
Stock options exercised (shares)			26,479
Stock-based compensation	8,450		$ 0	8,450
Stock-based compensation (shares)			4,538
Issuance of restricted stock, net of tax withholdings	(1,182)		$ 21	(1,203)
Issuance of restricted stock, net of tax withholdings (shares)			59,437
Other comprehensive income	(3)				(3)
Net income	68,404					68,404
Ending balance at Oct. 26, 2019	880,150		$ 10,507	30,040	(1,285)	840,888
Ending balance (shares) at Oct. 26, 2019			31,520,485
Beginning balance at Jul. 27, 2019	853,433		$ 10,496	27,563	(1,285)	816,659
Beginning balance (shares) at Jul. 27, 2019			31,489,923
Increase (Decrease) in Stockholders' Equity
Stock options exercised	130		$ 3	127
Stock options exercised (shares)			9,609
Stock-based compensation	2,694		$ 0	2,694
Stock-based compensation (shares)			1,301
Issuance of restricted stock, net of tax withholdings	(336)		$ 8	(344)
Issuance of restricted stock, net of tax withholdings (shares)			19,652
Net income	24,229					24,229
Ending balance at Oct. 26, 2019	880,150		$ 10,507	30,040	(1,285)	840,888
Ending balance (shares) at Oct. 26, 2019			31,520,485
Beginning balance at Jan. 25, 2020	$ 868,604		$ 10,528	30,158	(1,781)	829,699
Beginning balance (shares) at Jan. 25, 2020	31,583,938		31,583,938
Increase (Decrease) in Stockholders' Equity
Stock options exercised	$ 5,425		$ 92	5,333
Stock options exercised (shares)			275,275
Stock-based compensation	10,490		$ 1	10,489
Stock-based compensation (shares)			4,313
Issuance of restricted stock, net of tax withholdings	(500)		$ 15	(515)
Issuance of restricted stock, net of tax withholdings (shares)			45,640
Equity component of the settlement of 0.75% convertible senior notes due 2021, net of taxes	(8,976)			(8,976)
Purchase of warrants	(7,176)			(7,176)
Settlement of convertible note hedges related to extinguishment of convertible debt	7,197			7,197
Other comprehensive income	(1)				(1)
Net income	38,532					38,532
Ending balance at Oct. 24, 2020	$ 913,124		$ 10,636	36,510	(1,782)	867,760
Ending balance (shares) at Oct. 24, 2020	31,909,166		31,909,166
Beginning balance at Jul. 25, 2020	$ 873,748		$ 10,612	31,093	(1,791)	833,834
Beginning balance (shares) at Jul. 25, 2020			31,836,930
Increase (Decrease) in Stockholders' Equity
Stock options exercised	1,816		$ 21	1,795
Stock options exercised (shares)			62,748
Stock-based compensation	3,796		$ 0	3,796
Stock-based compensation (shares)			965
Issuance of restricted stock, net of tax withholdings	(171)		$ 3	(174)
Issuance of restricted stock, net of tax withholdings (shares)			8,523
Other comprehensive income	9				9
Net income	33,926					33,926
Ending balance at Oct. 24, 2020	$ 913,124		$ 10,636	$ 36,510	$ (1,782)	$ 867,760
Ending balance (shares) at Oct. 24, 2020	31,909,166		31,909,166
Increase (Decrease) in Stockholders' Equity
Cumulative effect from implementation of ASU 2016-13		$ (471)					$ (471)

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Cash flows from operating activities:
Net income	$ 24,229	$ 38,532	$ 68,404
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	47,356	132,313	140,941
Non-cash lease expense		23,480	22,263
Deferred income tax (benefit) provision		(20,478)	7,189
Stock-based compensation		10,490	8,450
Amortization of debt discount		6,732	15,016
Provision for bad debt (recovery), net	3,498	353	(7,015)
Gain on sale of fixed assets	(2,241)	(9,207)	(13,785)
Gain on debt extinguishment		(12,046)	0
Amortization of debt issuance costs and other		2,189	2,997
Goodwill impairment charge		53,264	0
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable, net		(122,520)	(297,573)
Contract assets, net		48,568	(122,514)
Other current assets and inventories		20,670	(13,795)
Other assets		5,212	39,219
Income taxes receivable/payable		10,513	12,256
Accounts payable		68,731	13,810
Accrued liabilities, insurance claims, operating lease liabilities, and other liabilities		22,629	(9,616)
Net cash provided by (used in) operating activities		279,425	(133,753)
Cash flows from investing activities:
Capital expenditures		(36,110)	(101,858)
Proceeds from sale of assets		11,859	16,169
Other investing activities		0	306
Net cash used in investing activities		(24,251)	(85,383)
Cash flows from financing activities:
Proceeds from borrowings on senior credit agreement, including term loans		773,000	345,000
Principal payments on senior credit agreement, including term loans		(704,875)	(242,000)
Extinguishment of 0.75% senior notes	0	(401,736)
Redemption discount on convertible debt, net of costs	0	30,761
Settlement of convertible note hedges related to extinguished convertible debt	0	7,197
Purchase of warrants	0	(7,176)
Exercise of stock options		5,425	313
Restricted stock tax withholdings		(500)	(1,182)
Net cash (used in) provided by financing activities		(297,904)	102,131
Net decrease in cash and equivalents and restricted cash		(42,730)	(117,005)
Cash, cash equivalents and restricted cash at beginning of period		59,869	134,151
Cash, cash equivalents and restricted cash at end of period	$ 17,146	17,139	17,146
Supplemental disclosure of other cash flow activities and non-cash investing and financing activities:
Cash paid for interest		17,652	19,966
Cash paid for taxes, net		38,309	6,588
Purchases of capital assets included in accounts payable or other accrued liabilities at period end		$ 3,726	$ 2,247

Basis of Presentation (Notes)

Basis of Presentation (Notes)	9 Months Ended
	Oct. 24, 2020
Basis of Presentation [Abstract]
Basis of Accounting	Basis of Presentation Dycom Industries, Inc. (“Dycom” or the “Company”) is a leading provider of specialty contracting services throughout the United States. These services include program management; planning; engineering and design; aerial, underground, and wireless construction; maintenance; and fulfillment services for telecommunications providers. Additionally, Dycom provides underground facility locating services for various utilities, including telecommunications providers, and other construction and maintenance services for electric and gas utilities. Dycom supplies the labor, tools, and equipment necessary to provide these services to its customers. The Company uses a 52/53 week fiscal year ending on the last Saturday in January. Fiscal 2020 consisted of 52 weeks of operations and fiscal year ending January 30, 2021 consists of 53 weeks of operation. The accompanying unaudited condensed consolidated financial statements of the Company and its subsidiaries, all of which are wholly-owned, have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X of the U.S. Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information and notes required by GAAP for annual financial statements and should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations contained in this report and the Company’s audited financial statements included in the Company’s Annual Report on Form 10-K for fiscal 2020, filed with the SEC on March 2, 2020. In the opinion of management, all adjustments considered necessary for a fair statement of the results for the interim periods presented have been included. This includes all normal and recurring adjustments and elimination of intercompany accounts and transactions. Operating results for the interim period are not necessarily indicative of the results expected for any subsequent interim or annual period. Segment Information. The Company operates in one reportable segment. Its services are provided by its operating segments on a decentralized basis. Each operating segment consists of a subsidiary (or in certain instances, the combination of two or more subsidiaries), the results of which are regularly reviewed by the Company’s Chief Executive Officer, the chief operating decision maker. All of the Company’s operating segments have been aggregated into one reportable segment based on their similar economic characteristics, nature of services and production processes, type of customers, and service distribution methods.

Significant Accounting Policies

Significant Accounting Policies and Estimates	9 Months Ended
	Oct. 24, 2020
Accounting Policies [Abstract]
Significant Accounting Policies and Estimates	Significant Accounting Policies and EstimatesThere have been no material changes to the Company’s significant accounting policies and critical accounting estimates described in the Company’s Annual Report on Form 10-K for fiscal 2020.Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the amounts reported in these condensed consolidated financial statements and accompanying notes. These estimates are based on our historical experience and management’s understanding of current facts and circumstances. At the time they are made, we believe that such estimates are fair when considered in conjunction with the Company’s consolidated financial position and results of operations taken as a whole. However, actual results could differ materially from those estimates.

Accounting Standards

Accounting Standards	9 Months Ended
	Oct. 24, 2020
Accounting Standards [Abstract]
Accounting Standards	Accounting Standards Recently issued accounting pronouncements are disclosed in the Company’s Annual Report on Form 10-K for fiscal 2020. As of the date of this Quarterly Report on Form 10-Q, there have been no changes in the expected dates of adoption or estimated effects on the Company’s condensed consolidated financial statements of recently issued accounting pronouncements from those disclosed in the Company’s Annual Report on Form 10-K for fiscal 2020. Further, there have been no additional accounting standards issued as of the date of this Quarterly Report on Form 10-Q that are applicable to the consolidated financial statements of the Company. Accounting standards adopted during the nine months ended October 24, 2020 are disclosed in this Quarterly Report on Form 10-Q. Recently Adopted Accounting Standards Financial Instruments . In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments - Credit Losses (Topic 326) (“ASU 2016-13”) as modified by subsequently issued ASUs 2018-19, 2019-04, 2019-05, 2019-11, and 2020-02. This ASU introduces a new accounting model, the Current Expected Credit Losses model (CECL), which could result in earlier recognition of credit losses and additional disclosures related to credit risk. The CECL model utilizes a lifetime expected credit loss measurement objective for the recognition of credit losses for financial instruments at the time the financial asset is originated or acquired. The financial instruments include accounts receivable and contract assets. The expected credit losses are adjusted each period for changes in expected lifetime credit losses. This model replaces the multiple existing impairment models in current GAAP, which generally require that a loss be incurred before it is recognized. The new standard also applies to receivables arising from revenue transactions such as contract assets and accounts receivables. On January 26, 2020, the first day of fiscal 2021, we adopted ASU 2016-13. The standard was adopted utilizing a modified retrospective approach and the adoption did not have a material impact on our condensed consolidated financial statements as credit losses are not expected to be significant based on historical trends and the financial condition of our customers. Goodwill. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 simplifies the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment testing. An entity will no longer determine goodwill impairment by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. Instead, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. On January 26, 2020, the first day of fiscal 2021, we adopted ASU 2017-04 and there was no effect on the Company’s condensed consolidated financial statements as a result of adoption. See Note 9, Goodwill and Intangible Assets, for disclosure of events during the nine months ended October 24, 2020. Intangibles. In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40), Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract (“ASU 2018-15”). This ASU aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). ASU 2018-15 is effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods, with early adoption permitted. The amendments in this ASU should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. We adopted the provisions of this ASU in the first quarter of fiscal 2021 on a prospective basis. Adoption of the new standard did not have a material impact on our condensed consolidated financial statements. Accounting Standards Not Yet Adopted In August 2020, the FASB issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815 - 40) . The amendments in this ASU simplify the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity by removing major separation models required under current U.S. GAAP. The amendments also improve the consistency of diluted earnings per share calculations. The amendments in this update are effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. Early adoption is permitted, but no earlier than fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. We are currently evaluating the impact of the standard on our condensed consolidated financial statements. In October 2020, the FASB issued ASU No. 2020-10, Codification Improvements (“ASU 2020-10”). The amendments in this ASU represent changes to clarify the Accounting Standards Codification (“ASC”), correct unintended application of guidance, or make minor improvements to the ASC that are not expected to have a significant effect on current accounting practice or create a significant administrative cost to most entities. ASU 2020-10 is effective for annual periods beginning after December 15, 2020 and interim periods within those annual periods, with early adoption permitted. The amendments in this ASU should be applied retrospectively. We will adopt the provisions of this ASU in the first quarter of fiscal 2022 and do not expect the adoption to have a material effect on our consolidated financial statements.

Computation of Earnings Per Com

Computation of Earnings Per Common Share	9 Months Ended
	Oct. 24, 2020
Earnings Per Share [Abstract]
Computation of Earnings Per Common Share	Computation of Earnings per Common Share The following table sets forth the computation of basic and diluted earnings per common share (dollars in thousands, except per share amounts): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Net income available to common stockholders (numerator) $ 33,926 $ 24,229 $ 38,532 $ 68,404 Weighted-average number of common shares (denominator) 31,878,583 31,502,543 31,744,199 31,480,759 Basic earnings per common share $ 1.06 $ 0.77 $ 1.21 $ 2.17 Weighted-average number of common shares 31,878,583 31,502,543 31,744,199 31,480,759 Potential shares of common stock arising from stock options, and unvested restricted share units 546,717 324,302 362,462 330,746 Total shares-diluted (denominator) 32,425,300 31,826,845 32,106,661 31,811,505 Diluted earnings per common share $ 1.05 $ 0.76 $ 1.20 $ 2.15 Anti-dilutive weighted shares excluded from the calculation of earnings per common share: Stock-based awards 238,226 239,540 245,633 256,269 0.75% convertible senior notes due 2021 (1) (2) 601,349 5,005,734 2,116,093 5,005,734 Warrants (1) (2) 601,349 5,005,734 2,116,093 5,005,734 Total 1,440,924 10,251,008 4,477,819 10,267,737 (1) Under the treasury stock method, our 0.75% convertible senior notes (“Notes”) will have a dilutive impact on earnings per common share if our average stock price for the period exceeds the $96.89 per share conversion price. Our average stock price did not exceed the per share conversion price during the three or nine months ended October 24, 2020; therefore, there was no dilutive impact on earnings per common share for these periods. The warrants associated with our Notes will have a dilutive impact on earnings per common share if our average stock price for the period exceeds the $130.43 per share warrant strike price. As our average stock price did not exceed the strike price for the warrants for any of the periods presented, the underlying common shares were anti-dilutive as reflected in the table above. (2) In connection with the purchase of $401.7 million of the Notes in fiscal 2021 and $25.0 million in fiscal 2020, we unwound convertible note hedge transactions and warrants proportionately to the number of Notes, resulting in a decrease in the number of excluded weighted shares. In connection with the offering of the Notes, we entered into convertible note hedge transactions with counterparties for the purpose of reducing the potential dilution to common stockholders from the conversion of the notes and offsetting any potential cash payments in excess of the principal amount of the notes. Prior to conversion, the convertible note hedge is not included for purposes of the calculation of earnings per common share as its effect would be anti-dilutive. Upon conversion, the convertible note hedge is expected to offset the dilutive effect of the convertible senior notes when the average stock price for the period is above $96.89 per share. See Note 13, Debt , for additional information related to our convertible senior notes, warrant transactions, and hedge transactions.

Accounts Receivable, Contract A

Accounts Receivable, Contract Assets, and Contract Liabilities	9 Months Ended
	Oct. 24, 2020
Receivables [Abstract]
Accounts Receivable, Contract Assets, and Contract Liabilities	Accounts Receivable, Contract Assets, and Contract Liabilities The following provides further details on the balance sheet accounts of accounts receivable, net; contract assets; and contract liabilities. Accounts Receivable Accounts receivable, net, classified as current, consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Trade accounts receivable $ 367,980 $ 355,805 Unbilled accounts receivable 559,067 453,353 Retainage 13,645 12,669 Total 940,692 821,827 Less: allowance for doubtful accounts (1,751) (4,582) Accounts receivable, net $ 938,941 $ 817,245 We maintain an allowance for doubtful accounts for estimated losses on uncollected balances. Approximately $16.8 million of the allowance for doubtful accounts as of January 26, 2019 was classified as non-current. The allowance for doubtful accounts changed as follows (dollars in thousands): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Allowance for doubtful accounts at beginning of period $ 1,605 $ 924 $ 4,582 $ 17,702 Cumulative effect from implementation of ASU 2016-13 — — 471 — Provision for bad debt (recovery) 117 3,498 353 (7,015) Amounts recovered (charged) against the allowance 29 135 (3,655) (6,130) Allowance for doubtful accounts at end of period $ 1,751 $ 4,557 $ 1,751 $ 4,557 Contract Assets and Contract Liabilities Net contract assets consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Contract assets $ 204,516 $ 253,005 Contract liabilities 16,412 16,332 Contract assets, net $ 188,104 $ 236,673 Net contract assets were $188.1 million and $236.7 million as of October 24, 2020 and January 25, 2020, respectively. The decrease primarily resulted from reduced services performed and increased billings under contracts consisting of multiple tasks. During the three and nine months ended October 24, 2020, we performed services and recognized $1.4 million and $13.1 million, respectively, of contract revenues related to its contract liabilities that existed at January 25, 2020. See Note 6, Other Current Assets and Other Assets , for information on our long-term contract assets. Customer Credit Concentration Customers whose combined amounts of accounts receivable and contract assets, net, exceeded 10% of total combined accounts receivable and contract assets, net, as of October 24, 2020 or January 25, 2020 were as follows (dollars in millions): October 24, 2020 January 25, 2020 Amount % of Total Amount % of Total Verizon Communications Inc. $ 415.6 36.9% $ 440.2 41.8% Lumen Technologies (1) $ 198.9 17.6% $ 175.8 16.7% Comcast Corporation $ 156.2 13.9% $ 114.0 10.8% (1) Formerly known as CenturyLink, Inc. We believe that none of the customers above were experiencing financial difficulties that would materially impact the collectability of the Company’s total accounts receivable and contract assets, net, as of October 24, 2020 or January 25, 2020. On April 14, 2020, Frontier Communications filed a voluntary petition under Chapter 11 of the United States Bankruptcy Code in the U.S. Bankruptcy Court for the Southern District of New York, to implement a prearranged debt restructuring plan. As of October 24, 2020, the Company had outstanding receivables and contract assets in aggregate of approximately $22.9 million with Frontier Communications. The Company has been identified as a critical vendor and expects to continue to provide service to Frontier Communications pursuant to existing contractual obligations and be paid in full for pre-petition and post-petition receivables and contract assets.

Other Current Assets and Other

Other Current Assets and Other Assets	9 Months Ended
	Oct. 24, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Current Assets and Other Assets	Other Current Assets and Other Assets Other current assets consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Prepaid expenses $ 22,745 $ 12,769 Deposits and other current assets 14,255 17,447 Restricted cash 1,372 1,556 Receivables on equipment sales 90 219 Other current assets $ 38,462 $ 31,991 Other assets consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Long-term contract assets $ 18,640 $ 22,653 Deferred financing costs 5,734 7,133 Restricted cash 3,731 3,753 Insurance recoveries/receivables for accrued insurance claims 12,506 4,864 Other non-current deposits and assets 7,767 9,035 Other assets $ 48,378 $ 47,438 Long-term contract assets represent payments made to customers pursuant to long-term agreements and are recognized as a reduction of contract revenues over the period for which the related services are provided to the customers. See Note 10, Accrued Insurance Claims , for information on our Insurance recoveries/receivables.

Cash, Cash Equivalents and Rest

Cash, Cash Equivalents and Restricted Cash	9 Months Ended
	Oct. 24, 2020
Cash and Cash Equivalents [Abstract]
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash Amounts of cash, cash equivalents and restricted cash reported in the condensed consolidated statement of cash flows consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Cash and cash equivalents $ 12,036 $ 54,560 Restricted cash included in: Other current assets 1,372 1,556 Other assets 3,731 3,753 Cash, cash equivalents and restricted cash $ 17,139 $ 59,869

Property and Equipment

Property and Equipment	9 Months Ended
	Oct. 24, 2020
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment consisted of the following (dollars in thousands): Estimated Useful Lives (Years) October 24, 2020 January 25, 2020 Land — $ 3,796 $ 4,024 Buildings 10-35 11,174 12,934 Leasehold improvements 1-10 16,945 17,151 Vehicles 1-5 616,397 626,307 Computer hardware and software 1-7 156,439 149,600 Office furniture and equipment 1-10 13,414 13,557 Equipment and machinery 1-10 309,345 312,244 Total 1,127,510 1,135,817 Less: accumulated depreciation (839,218) (759,207) Property and equipment, net $ 288,292 $ 376,610

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Oct. 24, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill Goodwill consisted of the following balances as of October 24, 2020 and January 25, 2020. There was no change in the carrying amount of goodwill during the three months ended October 24, 2020, during the nine months ended October 24, 2020 there was a cha nge of $53.3 million, as the result of a goodwill impairment charge (dollars in thousands): October 24, 2020 January 25, 2020 Goodwill, gross $ 521,516 $ 521,516 Accumulated impairment losses (249,031) (195,767) Total $ 272,485 $ 325,749 The Company’s goodwill resides in multiple reporting units and primarily consists of expected synergies, together with the expansion of the Company’s geographic presence and strengthening of its customer base from acquisitions. Goodwill and other indefinite-lived intangible assets are assessed annually for impairment, or more frequently if events occur that would indicate a potential reduction in the fair value of a reporting unit below its carrying value. The profitability of individual reporting units may suffer periodically due to downturns in customer demand, increased costs of providing services, and the level of overall economic activity. The Company’s customers may reduce capital expenditures and defer or cancel pending projects due to changes in technology, a slowing or uncertain economy, merger or acquisition activity, a decision to allocate resources to other areas of their business, or other reasons. The profitability of reporting units may also suffer if actual costs of providing services exceed the costs anticipated when the Company enters into contracts. Additionally, adverse conditions in the economy and future volatility in the equity and credit markets could impact the valuation of the Company’s reporting units. The cyclical nature of the Company’s business, the high level of competition existing within its industry, and the concentration of its revenues from a limited number of customers may also cause results to vary. These factors may affect individual reporting units disproportionately, relative to the Company as a whole. As a result, the performance of one or more of the reporting units could decline, resulting in an impairment of goodwill or intangible assets. The Company performs its annual goodwill assessment as of the first day of the fourth fiscal quarter of each fiscal year. As a result of the Company’s fiscal 2020 period assessment, the Company determined that the fair values of each of the reporting units and the indefinite-lived intangible asset were in excess of their carrying values and no impairment had occurred. Goodwill and indefinite lived intangible assets are required to be tested for impairment between annual tests if events occur that would indicate a potential reduction in the fair value of a reporting unit below its carrying value. During the nine months ended October 24, 2020, the economy of the United States was severely impacted by the nation’s response to the COVID-19 pandemic. Measures taken include travel restrictions, social distancing requirements, quarantines, and shelter in place orders. As a result, businesses have been closed and certain business activities curtailed or modified. During the COVID-19 pandemic, our services have generally been considered essential in nature and have not been materially interrupted. However, certain customers of one of the Company’s reporting units (“Broadband”) have decided to restrict our technicians from entering third party premises. Furthermore, customers have modified their protocols to increase the self-installation of customer premise equipment by their subscribers. Broadband generates a substantial portion of its revenue and operating results from installation services inside third party premises. The events following the onset of COVID-19 are expected to result in a prolonged downturn in customer demand for installation services from Broadband. This is expected to have a direct, adverse impact on its revenue, operating results and cash flows. These indicators represented a triggering event that warranted impairment testing of Broadband during the three months ended April 25, 2020. The Broadband reporting unit includes the operations of Broadband Installation Services, Prince Telecom and certain other operations and generated revenue of less than 4% of the consolidated contract revenue of Dycom in fiscal 2020. The Broadband reporting unit did not incur losses in fiscal 2020. The fiscal 2021 interim impairment analysis for Broadband utilized the same valuation techniques used in the Company’s annual fiscal 2020 impairment analysis. The key assumptions used to determine the fair value of the Company’s reporting units during this interim impairment analysis were: (a) expected cash flow for a period of seven years; (b) terminal value based upon terminal growth rates; and (c) a discount rate based on the Company’s best estimate of the weighted average cost of capital adjusted for risks associated with Broadband. Recent operating performance, along with key assumptions for specific customer and industry opportunities, were used during the fiscal 2021 interim impairment analysis. The terminal growth rate used in the fiscal 2021 interim assessment was 1.5% as compared to 3.0% in the fiscal 2020 assessment reflecting lower long-term demand levels. The discount rate used in the fiscal 2021 interim assessment was 12% compared to 10% in the fiscal 2020 assessment reflecting increased risk associated with the outlook of Broadband. The combination of lower expected operating results and cash flows from the reduction in revenue, as well as changes in valuation assumptions in the fiscal 2021 interim analysis resulted in a substantial decline in the fair value of the Broadband reporting unit. In accordance with ASU 2017-04, the Company compared the estimated fair value of Broadband to its carrying amount. As a result, the Company recognized an impairment charge of $53.3 million which is the amount by which the carrying amount exceeded the reporting unit’s fair value. After the impairment charge, Broadband had $10.1 million of remaining goodwill as of October 24, 2020. The goodwill impairment charge did not affect the Company’s compliance with its financial covenants and conditions under its revolving credit agreement. The Company determined that there were no events or changes in circumstances for the other reporting units or indefinite lived intangible asset during the nine months ended October 24, 2020 that would indicate a potential reduction in their fair value below their carrying amounts. As of October 24, 2020, the Company continues to believe the remaining goodwill and the indefinite-lived intangible asset are recoverable for all of its reporting units . However, if adverse events were to occur or circumstances were to change indicating that the carrying amount of such assets may not be fully recoverable, the assets would be reviewed for impairment. Intangible Assets Our intangible assets consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Weighted Average Remaining Useful Lives (Years) Gross Carrying Amount Accumulated Amortization Intangible Assets, Net Gross Carrying Amount Accumulated Amortization Intangible Assets, Net Customer relationships 9.6 $ 312,017 $ 193,530 $ 118,487 $ 312,017 $ 178,411 $ 133,606 Trade names, finite 8.1 10,350 9,046 1,304 10,350 8,732 1,618 Trade name, indefinite — 4,700 — 4,700 4,700 — 4,700 Non-compete agreements — 200 200 — 200 179 21 $ 327,267 $ 202,776 $ 124,491 $ 327,267 $ 187,322 $ 139,945 Amortization of our customer relationship intangibles is recognized on an accelerated basis as a function of the expected economic benefit. Amortization of our other finite-lived intangibles is recognized on a straight-line basis over the estimated useful life. Amortization expense for finite-lived intangible assets was $5.0 million and $5.3 million for the three months ended October 24, 2020 and October 26, 2019, respectively, and $15.5 million and $15.9 million for the nine months ended October 24, 2020 and October 26, 2019, respectively. As of October 24, 2020, we believe that the carrying amounts of our intangible assets are recoverable. However, if adverse events were to occur or circumstances were to change indicating that the carrying amount of such assets may not be fully recoverable, the assets would be reviewed for impairment.

Accrued Insurance Claims

Accrued Insurance Claims	9 Months Ended
	Oct. 24, 2020
Accrued Insurance Claims [Abstract]
Accrued Insurance Claims	Accrued Insurance Claims For claims within our insurance program, we retain the risk of loss, up to certain limits, for matters related to automobile liability, general liability (including damages associated with underground facility locating services), workers’ compensation, and employee group health. With regard to workers’ compensation losses occurring in the 12 month policy period ended in January 2020, we retained the risk of loss up to $1.0 million on a per occurrence basis. This retention amount is unchanged for the 12 month policy period ending in January 2021. This retention amount is applicable to all of the states in which we operate, except with respect to workers’ compensation insurance in two states in which we participate in state-sponsored insurance funds. With regard to automobile liability and general liability losses the retention amount is unchanged for the first $5.0 million of insurance coverage (“primary liability insurance”) for the 12 month policy period ending in January 2021. Aggregate stop-loss coverage for primary insurance claims, including workers’ compensation claims, is $85.8 million for the 12 month policy period ending January 2021. With regard to automobile liability and general liability losses between $5.0 million and $10.0 million, aggregate stop-loss coverage is $11.5 million for the 12 month period ending January 2021. Losses greater than $10.0 million are covered by insurance. We are party to a stop-loss agreement for losses under our employee group health plan. For calendar year 2020, we retain the risk of loss, on an annual basis, up to the first $450,000 of claims per participant, as well as an annual aggregate amount for all participants of $475,000. Amounts for total accrued insurance claims and insurance recoveries/receivables are as follows (dollars in thousands): October 24, 2020 January 25, 2020 Accrued insurance claims - current $ 43,623 $ 38,881 Accrued insurance claims - non-current 67,195 56,026 Accrued insurance claims $ 110,818 $ 94,907 Insurance recoveries/receivables: Non-current (included in Other assets) 12,506 4,864 Insurance recoveries/receivables $ 12,506 $ 4,864

Leases (Notes)

Leases (Notes)	9 Months Ended
	Oct. 24, 2020
Leases [Abstract]
Leases	Leases We lease the majority of our office facilities as well as certain equipment, all of which are accounted for as operating leases. These leases have remaining terms ranging from less than 1 year to approximately 9 years. Some leases include options to extend the lease for up to 5 years and others include options to terminate. The following table summarizes the components of lease cost recognized in the condensed consolidated statements of operations for the three and nine months ended October 24, 2020 and October 26, 2019 (dollars in thousands): For the Three Months Ended For the Three Months Ended For the Nine Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Lease cost under long-term operating leases $ 8,804 $ 8,388 $ 17,691 $ 25,095 Lease cost under short-term operating leases 6,624 8,641 21,740 25,662 Variable lease cost under short-term and long-term operating leases (1) 743 933 12,499 3,182 Total lease cost $ 16,171 $ 17,962 $ 51,930 $ 53,939 (1) Variable lease cost primarily includes insurance, maintenance, and other operating expenses related to our leased office facilities. Our operating lease liabilities related to long-term operating leases were $66.4 million as of October 24, 2020 and $70.2 million as of January 25, 2020. Supplemental balance sheet information related to these liabilities is as follows: October 24, 2020 January 25, 2020 Weighted average remaining lease term 3.3 years 3.3 years Weighted average discount rate 4.9 % 5.2 % Supplemental cash flow information related to our long-term operating lease liabilities as of October 24, 2020 and October 26, 2019 is as follows (dollars in thousands): For the Three Months Ended For the Three Months Ended For the Nine Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Cash paid for amounts included in the measurement of lease liabilities $ 8,489 $ 8,271 $ 27,158 $ 23,076 Operating lease right-of-use assets obtained in exchange for operating lease liabilities $ 3,479 $ 6,486 $ 21,235 $ 19,777 As of October 24, 2020, maturities of our lease liabilities under our long-term operating leases for the next five fiscal years and thereafter are as follows (dollars in thousands): Fiscal Year Amount Remainder of 2021 $ 7,617 2022 27,552 2023 17,460 2024 10,238 2025 6,462 Thereafter 4,401 Total lease payments 73,730 Less: imputed interest (7,328) Total $ 66,402 As of October 24, 2020, the Company had additional operating leases that have not yet commenced of $0.5 million. These leases will commence during the fourth quarter of fiscal 2021. As of January 25, 2020, the future minimum obligation by fiscal year for our operating leases with original noncancelable terms in excess of one year was as follows (dollars in thousands): Fiscal Year Amount 2021 $ 30,138 2022 22,274 2023 13,236 2024 7,916 2025 4,607 Thereafter 1,495 Total lease payments 79,666 Less: imputed interest (9,479) Total $ 70,187

Other Accrued Liabilities

Other Accrued Liabilities	9 Months Ended
	Oct. 24, 2020
Payables and Accruals [Abstract]
Other Accrued Liabilities	Other Accrued Liabilities Other accrued liabilities consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Accrued payroll and related taxes $ 30,899 $ 25,810 Accrued employee benefit and incentive plan costs 30,132 25,489 Accrued construction costs 25,881 27,690 Other current liabilities 20,480 19,786 Other accrued liabilities $ 107,392 $ 98,775

Debt

Debt	9 Months Ended
	Oct. 24, 2020
Debt Disclosure [Abstract]
Debt	Debt Our outstanding indebtedness consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Credit Agreement - Revolving facility (matures October 2023) $ 85,000 $ — Credit Agreement - Term loan facility (matures October 2023) 427,500 444,375 0.75% convertible senior notes, net (mature September 2021) 55,621 422,526 568,121 866,901 Less: current portion (78,121) (22,500) Long-term debt $ 490,000 $ 844,401 Senior Credit Agreement On October 19, 2018, the Company and certain of its subsidiaries amended and restated its existing credit agreement, dated as of December 3, 2012, as amended on April 24, 2015 and as subsequently amended and supplemented, with the various lenders party thereto (the “Credit Agreement”). The maturity date of our credit agreement was extended to October 19, 2023 and, among other things, the maximum revolver commitment was increased to $750.0 million from $450.0 million and the term loan facility was increased to $450.0 million. Our credit agreement includes a $200.0 million sublimit for the issuance of letters of credit. Subject to certain conditions, the credit agreement provides us with the ability to enter into one or more incremental facilities either by increasing the revolving commitments under the credit agreement and/or in the form of term loans, up to the greater of (i) $350.0 million and (ii) an amount such that, after giving effect to such incremental facilities on a pro forma basis (assuming that the amount of the incremental commitments are fully drawn and funded), the consolidated senior secured net leverage ratio does not exceed 2.25 to 1.00. The consolidated senior secured net leverage ratio is the ratio of our consolidated senior secured indebtedness reduced by unrestricted cash and equivalents in excess of $50.0 million to our trailing twelve-month consolidated earnings before interest, taxes, depreciation, and amortization, as defined by the credit agreement (“EBITDA”). Borrowings under the credit agreement are guaranteed by substantially all of our subsidiaries and secured by the equity interests of the substantial majority of our subsidiaries. Under our credit agreement, borrowings bear interest at the rates described below based upon our consolidated net leverage ratio, which is the ratio of our consolidated total funded debt reduced by unrestricted cash and equivalents in excess of $50.0 million to our trailing twelve-month consolidated EBITDA, as defined by the credit agreement. In addition, we incur certain fees for unused balances and letters of credit at the rates described below, also based upon our consolidated net leverage ratio. Borrowings - Eurodollar Rate Loans 1.25% - 2.00% plus LIBOR Borrowings - Base Rate Loans 0.25% - 1.00% plus administrative agent’s base rate (1) Unused Revolver Commitment 0.20% - 0.40% Standby Letters of Credit 1.25% - 2.00% Commercial Letters of Credit 0.625% -1.000% (1) The administrative agent’s base rate is described in our credit agreement as the highest of (i) the Federal Funds Rate plus 0.50%, (ii) the administrative agent’s prime rate, and (iii) the Eurodollar rate plus 1.00%. Standby letters of credit of approximately $52.2 million and 52.3 million, issued as part of our insurance program, were outstanding under the credit agreement as of October 24, 2020 and January 25, 2020, respectively. The weighted average interest rates and fees for balances under our credit agreement as of October 24, 2020 and January 25, 2020 were as follows: Weighted Average Rate End of Period October 24, 2020 January 25, 2020 Borrowings - Term loan facilities 1.77% 3.67% Borrowings - Revolving facility (1) 2.39% —% Standby Letters of Credit 1.63% 2.00% Unused Revolver Commitment 0.30% 0.40% (1) There were no outstanding borrowings under the revolving facility as of January 25, 2020. Our credit agreement contains a financial covenant that requires us to maintain a consolidated net leverage ratio of not greater than 3.50 to 1.00, as measured at the end of each fiscal quarter, and provides for certain increases to this ratio in connection with permitted acquisitions. The agreement also contains a financial covenant that requires us to maintain a consolidated interest coverage ratio, which is the ratio of our trailing twelve-month consolidated EBITDA to our consolidated interest expense, each as defined by the credit agreement, of not less than 3.00 to 1.00, as measured at the end of each fiscal quarter. In addition, our credit agreement contained a minimum liquidity covenant that would have become effective beginning 91 days before the maturity date of our 0.75% convertible senior notes due September 2021 (the “Notes”) if the outstanding principal amount of the Notes was greater than $250.0 million. This covenant terminated on June 5, 2020 when the outstanding principal amount of the Notes was reduced to $58.3 million. At October 24, 2020 and January 25, 2020, we were in compliance with the financial covenants of our credit agreement and had borrowing availability under the revolving facility of $575.0 million and $287.0 million, respectively, as determined by the most restrictive covenant. 0.75% Convertible Senior Notes Due 2021 On September 15, 2015, we issued 0.75% convertible senior notes due September 2021 in a private placement in the principal amount of $485.0 million. The Notes, governed by the terms of an indenture between the Company and a bank trustee, are unsecured obligations and do not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness, or the issuance or repurchase of securities by the Company. The Notes bear interest at a rate of 0.75% per year, payable in cash semiannually in March and September, and will mature on September 15, 2021, unless earlier purchased by the Company or converted. In the event we fail to perform certain obligations under the indenture, the Notes will accrue additional interest. Certain events are considered “events of default” under the Notes, which may result in the acceleration of the maturity of the Notes, as described in the indenture. During the fourth quarter of fiscal 2020, we purchased, through open-market transactions, $25.0 million aggregate principal amount of the Notes for $24.3 million, leaving the principal amount of $460.0 million outstanding. After the write-off of associated debt issuance costs, the net loss on extinguishment was $0.1 million for fiscal 2020. In fiscal 2021, we purchased $401.7 million aggregate principal amount of the Notes for $371.4 million, including interest and fees, leaving the principal amount of $58.3 million outstanding. These Notes were purchased through privately-negotiated transactions and a tender offer. After the write-off of associated debt issuance costs, the net gain on extinguishment was $12.0 million for fiscal 2021. Each $1,000 of principal of the Notes is convertible into 10.3211 shares of the Company’s common stock, which is equivalent to an initial conversion price of approximately $96.89 per share. The conversion rate is subject to adjustment in certain circumstances, including in connection with specified fundamental changes (as defined in the indenture). In addition, holders of the Notes have the right to require the Company to repurchase all or a portion of their notes on the occurrence of a fundamental change at a price of 100% of their principal amount plus accrued and unpaid interest. Prior to June 15, 2021, the Notes are convertible by the Note holder under the following circumstances: (1) during any fiscal quarter commencing after October 24, 2015 (and only during such fiscal quarter) if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during the 30 consecutive trading days period ending on the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the applicable conversion price on such trading day ($125.96 assuming an applicable conversion price of $96.89); (2) during the five consecutive business day period after any five consecutive trading day period (the “measurement period”) in which the trading price per $1,000 principal amount of Notes for each trading day of such measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the applicable conversion rate on each such trading day; or (3) upon the occurrence of specified corporate events. On or after June 15, 2021 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or a portion of their Notes at any time regardless of the foregoing circumstances. Upon conversion, the Notes will be settled, at the Company’s election, in cash, shares of the Company’s common stock, or a combination of cash and shares of the Company’s common stock. The Company intends to settle the principal amount of the Notes with cash. During the three months ended October 24, 2020, the closing price of the Company’s common stock did not meet or exceed 130% of the applicable conversion price of the Notes for at least 20 of the last 30 consecutive trading dates of the quarter. Additionally, no other conditions allowing holders of the Notes to convert have been met as of October 24, 2020. As a result, the Notes were not convertible during the three months ended October 24, 2020 and are classified as debt. Convertible debt instruments that may be settled in cash upon conversion are required to be accounted for as separate liability and equity components. As of the date of issuance, the carrying amount of the liability component is calculated by measuring the fair value of a similar instrument that does not have an associated convertible feature using an indicative market interest rate (“Comparable Yield”). The difference between the principal amount of the notes and the carrying amount represents a debt discount. The debt discount is amortized to interest expense using the Comparable Yield (5.5% with respect to the Notes) using the effective interest rate method over the term of the Notes. During the three months ended October 24, 2020 and October 26, 2019, we incurred $0.6 million and $5.1 million, respectively, of interest expense for the non-cash amortization of the debt discount. During the nine months ended October 24, 2020 and October 26, 2019 we incurred $6.7 million and $15.0 million, respectively, of interest expense for the non-cash amortization of the debt discount. The liability component of the Notes consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Liability component Principal amount of 0.75% convertible senior notes due September 2021 $ 58,264 $ 460,000 Less: Debt discount (2,375) (33,744) Less: Debt issuance costs (268) (3,730) Net carrying amount of Notes $ 55,621 $ 422,526 The equity component of the Notes was recognized at issuance and represents the difference between the principal amount of the Notes and the fair value of the liability component of the Notes at issuance. The equity component approximated $112.6 million at the time of issuance and its fair value is not remeasured as long as it continues to meet the conditions for equity classification. The following table summarizes the fair value of the Notes, net of the debt discount and debt issuance costs. The fair value of the Notes is based on the closing trading price per $100 of the Notes as of the last day of trading for the respective periods (Level 2), which was $99.00 and $97.25 as of October 24, 2020 and January 25, 2020, respectively (dollars in thousands): October 24, 2020 January 25, 2020 Fair value of principal amount of Notes $ 57,681 $ 447,350 Less: Debt discount and debt issuance costs (2,643) (37,474) Fair value of Notes $ 55,038 $ 409,876 Convertible Note Hedge and Warrant Transactions In connection with the offering of the Notes, we entered into convertible note hedge transactions with counterparties for the purpose of reducing the potential dilution to common stockholders from the conversion of the Notes and offsetting any potential cash payments in excess of the principal amount of the Notes. In the event that shares or cash are deliverable to holders of the Notes upon conversion at limits defined in the indenture governing the Notes, counterparties to the convertible note hedge will be required to deliver to us shares of our common stock or pay cash to us in a similar amount as the value that we deliver to the holders of the Notes based on a conversion price of $96.89 per share. At inception of the convertible note hedge transactions, up to 5.006 million of our shares could be deliverable to us upon conversion. After the Company settled a portion of the note hedge transactions during fiscal 2020 and fiscal 2021 in connection with the purchase of $25.0 million and $401.7 million, respectively, of the Notes, the number of shares that could be deliverable to us upon conversion was reduced to up to 0.601 million of our shares. We also entered into separately negotiated warrant transactions with the same counterparties as the convertible note hedge transactions whereby we sold warrants to purchase, subject to certain anti-dilution adjustments, up to 5.006 million shares of our common stock at a price of $130.43 per share. After the Company purchased a portion of the warrants during fiscal 2020 and fiscal 2021 in connection with the purchase of $25.0 million and $401.7 million, respectively, of the Notes, the remaining warrant transactions provide for up to 0.601 million shares. The warrants will not have a dilutive effect on our earnings per share unless our quarterly average share price exceeds the warrant strike price of $130.43 per share. In this event, we expect to settle the warrant transactions on a net share basis whereby we will issue shares of our common stock. Upon settlement of the conversion premium of the Notes, convertible note hedge, and warrants, the resulting dilutive impact of these transactions, if any, would be the number of shares necessary to settle the value of the warrant transactions above $130.43 per share. The net amounts incurred in connection with the convertible note hedge and warrant transactions were recorded as a reduction to additional paid-in capital on the consolidated balance sheets during fiscal 2016 and are not expected to be remeasured in subsequent reporting periods.

Income Taxes

Income Taxes	3 Months Ended
	Oct. 24, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our interim income tax provisions are based on the effective income tax rate expected to be applicable for the full fiscal year, adjusted for specific items that are required to be recognized in the period in which they occur. Deferred tax assets and liabilities are based on the enacted tax rate that will apply in future periods when such assets and liabilities are expected to be settled or realized. In response to the COVID-19 pandemic, the Coronavirus Aid, Relief and Economic Security Act (“CARES Act”) was signed into law on March 27, 2020. The CARES Act, among other things, includes tax provisions relating to refundable payroll tax credits, the deferral of employer’s social security payments, and modifications to net operating loss (“NOL”) carryback provisions. During the nine months ended October 24, 2020, we recognized an income tax benefit of $2.6 million from a tax loss carryback under the CARES Act. The Company will continue to evaluate the impact of the CARES Act on its financial position, results of operations and cash flows. Our effective income tax rate was 26.2% and 21.3% for the three months ended October 24, 2020 and October 26, 2019, respectively, and 41.2% and 27.1% for the nine months ended October 24, 2020 and October 26, 2019, respectively. The effective tax rate differs from the statutory rate each period primarily due to the difference in income tax rates from state to state where work was performed, changes in unrecognized tax benefits, variances in non-deductible and non-taxable items, tax credits recognized, and the impact of the vesting and exercise of share-based awards during the periods. Additionally, during the nine months ended October 24, 2020, our effective tax rate was impacted by the $53.3 million goodwill impairment charge which was mostly non-deductible for income tax purposes, and the benefit from the $2.6 million tax loss carryback under the CARES Act.

Other Income, Net

Other Income, Net	9 Months Ended
	Oct. 24, 2020
Other Income and Expenses [Abstract]
Other Income, Net	Other Income, Net The components of other income, net, were as follows (dollars in thousands): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Gain on sale of fixed assets $ 4,001 $ 2,241 $ 9,207 $ 13,785 Discount fee expense (432) (959) (1,706) (3,520) Miscellaneous income, net 139 125 420 846 Other income, net $ 3,708 $ 1,407 $ 7,921 $ 11,111 We participate in a vendor payment program sponsored by one of our customers. Eligible accounts receivable from this customer are included in the program and payment is received pursuant to a non-recourse sale to a bank partner. This program effectively reduces the time to collect these receivables as compared to that customer’s standard payment terms. We incur a discount fee to the bank on the payments received that is reflected as discount fee expense in the table above and is included as an expense component in other income, net, in the condensed consolidated statements of operations.

Capital Stock

Capital Stock	9 Months Ended
	Oct. 24, 2020
Stockholders' Equity Note [Abstract]
Capital Stock	Capital Stock Repurchases of Common Stock. On August 24, 2020 the Company announced that its Board of Directors had authorized a $100.0 million program to repurchase shares of the Company’s outstanding common stock through February 2022 in open market or private transactions. As of October 24, 2020, $100.0 million of the repurchase authorization remained available.

Stock-Based Awards

Stock-Based Awards	9 Months Ended
	Oct. 24, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Awards	Stock-Based Awards We have certain stock-based compensation plans under which we grant stock-based awards, including common stock, stock options, time-based restricted share units (“RSUs”), and performance-based restricted share units (“Performance RSUs”) to attract, retain, and reward talented employees, officers, and directors, and to align stockholder and employee interests. Compensation expense for stock-based awards is based on fair value at the measurement date. This expense fluctuates over time as a function of the duration of vesting periods of the stock-based awards and the Company’s performance, as measured by criteria set forth in performance-based awards. Stock-based compensation expense is included in general and administrative expenses in the condensed consolidated statements of operations and the amount of expense ultimately recognized depends on the quantity of awards that actually vest. Accordingly, stock-based compensation expense may vary from period to period. The performance criteria for the Company’s performance-based equity awards utilize the Company’s operating earnings (adjusted for certain amounts) as a percentage of contract revenues for the applicable four-quarter period (a “Performance Year”) and its Performance Year operating cash flow level (adjusted for certain amounts). Additionally, certain awards include three-year performance measures that, if met, result in supplemental shares awarded. For Performance RSUs, the Company evaluates compensation expense quarterly and recognizes expense for performance-based awards only if it determines it is probable that performance criteria for the awards will be met. Stock-based compensation expense and the related tax benefit recognized during the three and nine months ended October 24, 2020 and October 26, 2019 were as follows (dollars in thousands): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Stock-based compensation $ 3,796 $ 2,694 $ 10,490 $ 8,450 Income tax effect of stock-based compensation $ 944 $ 669 $ 2,606 $ 2,098 In addition, during the three months ended October 24, 2020 and October 26, 2019, the Company realized a nominal amount of excess tax benefits and approximately $0.2 million of net tax deficiencies, respectively, related to the vesting and exercise of share-based awards. During the nine months ended October 24, 2020 and October 26, 2019, the Company realized approximately $0.2 million of net excess tax benefits and $0.8 million of net tax deficiencies, respectively. As of October 24, 2020, we had unrecognized compensation expense related to stock options, RSUs, and target Performance RSUs (based on the Company’s expected achievement of performance measures) of $1.9 million, $16.6 million, and $7.2 million, respectively. This expense will be recognized over a weighted-average number of years of 2.5, 2.7, and 1.2, respectively, based on the average remaining service periods for the awards. As of October 24, 2020, we may recognize an additional $11.2 million in compensation expense in future periods if the maximum number of Performance RSUs is earned based on certain performance measures being met. Stock Options The following table summarizes stock option award activity during the nine months ended October 24, 2020: Stock Options Shares Weighted Average Exercise Price Outstanding as of January 25, 2020 577,309 $ 36.85 Granted 63,304 $ 25.15 Options exercised (275,275) $ 19.71 Canceled — $ — Outstanding as of October 24, 2020 365,338 $ 47.74 Exercisable options as of October 24, 2020 244,215 $ 48.49 RSUs and Performance RSUs The following table summarizes RSU and Performance RSU award activity during the nine months ended October 24, 2020: Restricted Stock RSUs Performance RSUs Share Units Weighted Average Grant Date Fair Value Share Units Weighted Average Grant Date Fair Value Outstanding as of January 25, 2020 174,917 $ 65.05 639,738 $ 62.60 Granted 537,618 $ 25.74 65,538 $ 25.15 Share units vested (53,072) $ 65.48 (17,134) $ 70.14 Forfeited or canceled (13,206) $ 47.21 (258,524) $ 66.79 Outstanding as of October 24, 2020 646,257 $ 32.68 429,618 $ 54.06 The total number of granted Performance RSUs presented above consists of 32,769 target shares and 32,769 supplemental shares. The total number of Performance RSUs outstanding as of October 24, 2020 consists of 286,151 target shares and 143,467 supplemental shares. With respect to the Company’s Performance Year ended July 25, 2020, the Company canceled 23,141 target shares and 11,336 supplemental shares during the three months ended October 24, 2020 as a result of the performance period criteria being partially met.

Customer Concentration and Reve

Customer Concentration and Revenue Information	9 Months Ended
	Oct. 24, 2020
Risks and Uncertainties [Abstract]
Customer Concentration and Revenue Information	Customer Concentration and Revenue Information Geographic Location We provide services throughout the United States. Significant Customers Our customer base is highly concentrated, with our top five customers accounting for approximately 75.6% and 78.7% of total contract revenues during the nine months ended October 24, 2020 and October 26, 2019, respectively. Customers whose contract revenues exceeded 10% of total contract revenues during the three and nine months ended October 24, 2020 or October 26, 2019, as well as total contract revenues from all other customers combined, were as follows (dollars in millions): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Amount % of Total Amount % of Total Amount % of Total Amount % of Total Verizon Communications Inc. $ 144.8 17.9% $ 182.1 20.6% $ 483.8 19.8% $ 566.9 21.8% Lumen Technologies (1) 134.4 16.6 164.1 18.6 441.5 18.0 412.7 15.9 AT&T Inc. 118.9 14.7 162.9 18.4 407.5 16.6 555.4 21.3 Comcast Corporation 143.6 17.7 131.3 14.9 393.0 16.0 401.6 15.4 Total other customers combined 268.6 33.1 243.7 27.6 722.7 29.5 665.5 25.6 Total contract revenues $ 810.3 100.0% $ 884.1 100.0% $ 2,448.5 100.0% $ 2,602.1 100.0% (1) Formerly known as CenturyLink, Inc. See Note 5, Accounts Receivable, Contract Assets, and Contract Liabilities , for information on our customer credit concentration and collectability of trade accounts receivable and contract assets. Customer Type Total contract revenues by customer type during the three and nine months ended October 24, 2020 and October 26, 2019 were as follows (dollars in millions): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Amount % of Total Amount % of Total Amount % of Total Amount % of Total Telecommunications $ 721.2 89.0% $ 798.1 90.3% $ 2,193.9 89.6% $ 2,363.9 90.8% Underground facility locating 59.0 7.3 56.0 6.3 171.3 7.0 158 6.1 Electrical and gas utilities and other 30.1 3.7 30.0 3.4 83.3 3.4 80.2 3.1 Total contract revenues $ 810.3 100.0% $ 884.1 100.0% $ 2,448.5 100.0% $ 2,602.1 100.0% Remaining Performance Obligations Master service agreements and other contractual agreements with customers contain customer-specified service requirements, such as discrete pricing for individual tasks. In most cases, our customers are not contractually committed to procure specific volumes of services under these agreements. Services are generally performed pursuant to these agreements in accordance with individual work orders. An individual work order generally is completed within one year. As a result, our remaining performance obligations under the work orders not yet completed is not meaningful in relation to our overall revenue at any given point in time. We apply the practical expedient in Accounting Standards Codification Topic 606, Revenue from Contracts with Customers, and do not disclose information about remaining performance obligations that have original expected durations of one year or less.

Commitment and Contingencies

Commitment and Contingencies	9 Months Ended
	Oct. 24, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies On October 25, 2018 and October 30, 2018, the Company, its Chief Executive Officer and its Chief Financial Officer were named as defendants in two substantively identical lawsuits alleging violations of the federal securities fraud laws. The lawsuits, which purport to be brought on behalf of a class of all purchasers of the Company’s securities between November 20, 2017 and August 10, 2018, were filed in the United States District Court for the Southern District of Florida (the “Court”). The cases were consolidated by the Court on January 11, 2019. The lawsuit alleges that the defendants made materially false and misleading statements or failed to disclose material facts regarding the Company’s financial condition and business operations, including those related to the Company’s dependency on, and uncertainties related to, the permitting necessary for its large projects. The Parties entered into an agreement to settle the consolidated lawsuit, subject to Court approval of the settlement. On October 13, 2020, the Court approved the settlement, and dismissed the consolidated complaint in its entirety, with prejudice. The time for filing an appeal has expired with no appeal having been filed. The settlement does not include any admission by the Company or any of its officers of the allegations made in the lawsuit. The full settlement amount was covered by the Company’s insurance carriers. On December 17, 2018 and May 8, 2020, shareholder derivative actions were filed in United States District Court for the Southern District of Florida against the Company, as nominal defendant, and the members of its Board of Directors (and, in the second action, the Company’s Chief Financial Officer), alleging that the defendants breached fiduciary duties owed to the Company and violated the securities laws by causing the Company to issue false and misleading statements. The statements alleged to be false and misleading are the same statements that are alleged to be false and misleading in the securities lawsuit described above. On June 12, 2020, the Court consolidated the two lawsuits. On November 16, 2020, the plaintiffs filed a consolidated amended complaint in which the plaintiffs alleged the same breaches of fiduciary duty and violations of the securities laws as were alleged in the two consolidated lawsuits when they were initially filed. The consolidated amended complaint names the Company as nominal defendant and asserts claims against seven current members of its Board of Directors and two former members of the Board. The Company believes the allegations in the lawsuit is without merit and expects it to be vigorously defended. Based on the early stage of this matter, it is not possible to estimate the amount or range of possible loss that may result from an adverse judgment or a settlement of this matter. During the fourth quarter of fiscal 2016, one of the Company’s subsidiaries ceased operations. This subsidiary contributed to a multiemployer pension plan, the Pension, Hospitalization and Benefit Plan of the Electrical Industry - Pension Trust Fund (the “Plan”). In October 2016, the Plan demanded payment for a claimed withdrawal liability of approximately $13.0 million. In December 2016, we submitted a formal request to the Plan seeking review of the Plan’s withdrawal liability determination. We dispute the claim that it is required to make payment of a withdrawal liability as demanded by the Plan as it believes there is a statutory exemption under the Employee Retirement Income Security Act (“ERISA”) that applies to its activities. The Plan has taken the position that the work at issue does not qualify for the statutory exemption. We have submitted this dispute to arbitration, as required by ERISA, with a hearing expected early calendar year 2021. There can be no assurance that we will be successful in asserting the statutory exemption as a defense in the arbitration proceeding. As required by ERISA, in November 2016, the subsidiary began making payments of a withdrawal liability to the Plan in the amount of approximately $0.1 million per month. If we prevail in disputing the withdrawal liability, all such payments are expected to be refunded. From time to time, the Company is party to various claims and legal proceedings arising in the ordinary course of business. While the resolution of these matters cannot be predicted with certainty, it is the opinion of management, based on information available at this time, that the ultimate resolution of any such claims or legal proceedings will not, after considering applicable insurance coverage or other indemnities to which the Company may be entitled, have a material effect on our financial position, results of operations, or cash flow. For claims within our insurance program, we retain the risk of loss, up to certain limits, for matters related to automobile liability, general liability (including damages associated with underground facility locating services), workers’ compensation, and employee group health. We have established reserves that we believe to be adequate based on current evaluations and experience with these types of claims. For these claims, the effect on our financial statements is generally limited to the amount needed to satisfy insurance deductibles or retentions. The economy of the United States has been severely impacted by the nation’s response to the COVID-19 pandemic. Measures taken include travel restrictions, social distancing requirements, quarantines, and shelter in place orders. As a result, businesses have been closed and certain business activities curtailed or modified. During the COVID-19 pandemic, our services have generally been considered essential in nature and have not been materially interrupted. As the situation continues to evolve, we are closely monitoring the impact of the COVID-19 pandemic on all aspects of our business, including its affects on our customers, subcontractors, suppliers, vendors and employees, in addition to how the COVID-19 pandemic impacts our ability to provide services to our customers. The full extent of the impact of the COVID-19 pandemic on the Company's operational and financial performance will be determined by factors which are uncertain, unpredictable and outside of our control, including the duration of the pandemic, any worsening of the pandemic, the containment and mitigation actions taken by federal, state and local governments, and the resulting impact on the demand for our services from our customers. The situation surrounding COVID-19 remains fluid, and if disruptions do arise, they could materially adversely impact our business. Commitments Performance and Payment Bonds and Guarantees. We have obligations under performance and other surety contract bonds related to certain of our customer contracts. Performance bonds generally provide a customer with the right to obtain payment and/or performance from the issuer of the bond if we fail to perform our contractual obligations. As of October 24, 2020 and January 25, 2020, we had $212.2 million and $156.1 million, respectively, of outstanding performance and other surety contract bonds. In addition to performance and other surety contract bonds, as part of our insurance program we also provide surety bonds that collateralize our obligations to our insurance carriers. As of October 24, 2020 and January 25, 2020, we had $23.4 million and $23.4 million, respectively, of outstanding surety bonds related to our insurance obligations. Additionally, we periodically guarantee certain obligations of our subsidiaries, including obligations in connection with obtaining state contractor licenses and leasing real property and equipment. Letters of Credit. We have issued standby letters of credit under our credit agreement that collateralize our obligations to our insurance carriers. As of October 24, 2020 and January 25, 2020, the we had $52.2 million and $52.3 million, respectively, of outstanding standby letters of credit issued under the Credit Agreement.

Significant Accounting Polici_2

Significant Accounting Policies and Estimates (Policies)	9 Months Ended
	Oct. 24, 2020
Accounting Policies [Abstract]
Basis of Presentation	Dycom Industries, Inc. (“Dycom” or the “Company”) is a leading provider of specialty contracting services throughout the United States. These services include program management; planning; engineering and design; aerial, underground, and wireless construction; maintenance; and fulfillment services for telecommunications providers. Additionally, Dycom provides underground facility locating services for various utilities, including telecommunications providers, and other construction and maintenance services for electric and gas utilities. Dycom supplies the labor, tools, and equipment necessary to provide these services to its customers.
Accounting Period	The Company uses a 52/53 week fiscal year ending on the last Saturday in January. Fiscal 2020 consisted of 52 weeks of operations and fiscal year ending January 30, 2021 consists of 53 weeks of operation.
Segment Reporting Disclosure	Segment Information. The Company operates in one reportable segment. Its services are provided by its operating segments on a decentralized basis. Each operating segment consists of a subsidiary (or in certain instances, the combination of two or more subsidiaries), the results of which are regularly reviewed by the Company’s Chief Executive Officer, the chief operating decision maker. All of the Company’s operating segments have been aggregated into one reportable segment based on their similar economic characteristics, nature of services and production processes, type of customers, and service distribution methods.
Use of Estimates	Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the amounts reported in these condensed consolidated financial statements and accompanying notes. These estimates are based on our historical experience and management’s understanding of current facts and circumstances. At the time they are made, we believe that such estimates are fair when considered in conjunction with the Company’s consolidated financial position and results of operations taken as a whole. However, actual results could differ materially from those estimates.
Recently Issued Accounting Pronouncements	Recently Adopted Accounting Standards Financial Instruments . In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments - Credit Losses (Topic 326) (“ASU 2016-13”) as modified by subsequently issued ASUs 2018-19, 2019-04, 2019-05, 2019-11, and 2020-02. This ASU introduces a new accounting model, the Current Expected Credit Losses model (CECL), which could result in earlier recognition of credit losses and additional disclosures related to credit risk. The CECL model utilizes a lifetime expected credit loss measurement objective for the recognition of credit losses for financial instruments at the time the financial asset is originated or acquired. The financial instruments include accounts receivable and contract assets. The expected credit losses are adjusted each period for changes in expected lifetime credit losses. This model replaces the multiple existing impairment models in current GAAP, which generally require that a loss be incurred before it is recognized. The new standard also applies to receivables arising from revenue transactions such as contract assets and accounts receivables. On January 26, 2020, the first day of fiscal 2021, we adopted ASU 2016-13. The standard was adopted utilizing a modified retrospective approach and the adoption did not have a material impact on our condensed consolidated financial statements as credit losses are not expected to be significant based on historical trends and the financial condition of our customers. Goodwill. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 simplifies the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment testing. An entity will no longer determine goodwill impairment by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. Instead, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. On January 26, 2020, the first day of fiscal 2021, we adopted ASU 2017-04 and there was no effect on the Company’s condensed consolidated financial statements as a result of adoption. See Note 9, Goodwill and Intangible Assets, for disclosure of events during the nine months ended October 24, 2020. Intangibles. In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40), Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract (“ASU 2018-15”). This ASU aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). ASU 2018-15 is effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods, with early adoption permitted. The amendments in this ASU should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. We adopted the provisions of this ASU in the first quarter of fiscal 2021 on a prospective basis. Adoption of the new standard did not have a material impact on our condensed consolidated financial statements. Accounting Standards Not Yet Adopted In August 2020, the FASB issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815 - 40) . The amendments in this ASU simplify the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity by removing major separation models required under current U.S. GAAP. The amendments also improve the consistency of diluted earnings per share calculations. The amendments in this update are effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. Early adoption is permitted, but no earlier than fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. We are currently evaluating the impact of the standard on our condensed consolidated financial statements. In October 2020, the FASB issued ASU No. 2020-10, Codification Improvements (“ASU 2020-10”). The amendments in this ASU represent changes to clarify the Accounting Standards Codification (“ASC”), correct unintended application of guidance, or make minor improvements to the ASC that are not expected to have a significant effect on current accounting practice or create a significant administrative cost to most entities. ASU 2020-10 is effective for annual periods beginning after December 15, 2020 and interim periods within those annual periods, with early adoption permitted. The amendments in this ASU should be applied retrospectively. We will adopt the provisions of this ASU in the first quarter of fiscal 2022 and do not expect the adoption to have a material effect on our consolidated financial statements.

Computation of Earnings Per C_2

Computation of Earnings Per Common Share (Tables)	9 Months Ended
	Oct. 24, 2020
Earnings Per Share [Abstract]
Schedule of Earnings Per Share Reconciliation	The following table sets forth the computation of basic and diluted earnings per common share (dollars in thousands, except per share amounts): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Net income available to common stockholders (numerator) $ 33,926 $ 24,229 $ 38,532 $ 68,404 Weighted-average number of common shares (denominator) 31,878,583 31,502,543 31,744,199 31,480,759 Basic earnings per common share $ 1.06 $ 0.77 $ 1.21 $ 2.17 Weighted-average number of common shares 31,878,583 31,502,543 31,744,199 31,480,759 Potential shares of common stock arising from stock options, and unvested restricted share units 546,717 324,302 362,462 330,746 Total shares-diluted (denominator) 32,425,300 31,826,845 32,106,661 31,811,505 Diluted earnings per common share $ 1.05 $ 0.76 $ 1.20 $ 2.15 Anti-dilutive weighted shares excluded from the calculation of earnings per common share: Stock-based awards 238,226 239,540 245,633 256,269 0.75% convertible senior notes due 2021 (1) (2) 601,349 5,005,734 2,116,093 5,005,734 Warrants (1) (2) 601,349 5,005,734 2,116,093 5,005,734 Total 1,440,924 10,251,008 4,477,819 10,267,737 (1) Under the treasury stock method, our 0.75% convertible senior notes (“Notes”) will have a dilutive impact on earnings per common share if our average stock price for the period exceeds the $96.89 per share conversion price. Our average stock price did not exceed the per share conversion price during the three or nine months ended October 24, 2020; therefore, there was no dilutive impact on earnings per common share for these periods. The warrants associated with our Notes will have a dilutive impact on earnings per common share if our average stock price for the period exceeds the $130.43 per share warrant strike price. As our average stock price did not exceed the strike price for the warrants for any of the periods presented, the underlying common shares were anti-dilutive as reflected in the table above. (2) In connection with the purchase of $401.7 million of the Notes in fiscal 2021 and $25.0 million in fiscal 2020, we unwound convertible note hedge transactions and warrants proportionately to the number of Notes, resulting in a decrease in the number of excluded weighted shares.

Accounts Receivable, Contract_2

Accounts Receivable, Contract Assets, and Contract Liabilities (Tables)	9 Months Ended
	Oct. 24, 2020
Receivables [Abstract]
Accounts Receivable	Accounts receivable, net, classified as current, consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Trade accounts receivable $ 367,980 $ 355,805 Unbilled accounts receivable 559,067 453,353 Retainage 13,645 12,669 Total 940,692 821,827 Less: allowance for doubtful accounts (1,751) (4,582) Accounts receivable, net $ 938,941 $ 817,245 For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Allowance for doubtful accounts at beginning of period $ 1,605 $ 924 $ 4,582 $ 17,702 Cumulative effect from implementation of ASU 2016-13 — — 471 — Provision for bad debt (recovery) 117 3,498 353 (7,015) Amounts recovered (charged) against the allowance 29 135 (3,655) (6,130) Allowance for doubtful accounts at end of period $ 1,751 $ 4,557 $ 1,751 $ 4,557
Contract Assets and Contract Liabilities	Net contract assets consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Contract assets $ 204,516 $ 253,005 Contract liabilities 16,412 16,332 Contract assets, net $ 188,104 $ 236,673
Customer Credit Concentration	Customers whose combined amounts of accounts receivable and contract assets, net, exceeded 10% of total combined accounts receivable and contract assets, net, as of October 24, 2020 or January 25, 2020 were as follows (dollars in millions): October 24, 2020 January 25, 2020 Amount % of Total Amount % of Total Verizon Communications Inc. $ 415.6 36.9% $ 440.2 41.8% Lumen Technologies (1) $ 198.9 17.6% $ 175.8 16.7% Comcast Corporation $ 156.2 13.9% $ 114.0 10.8% For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Amount % of Total Amount % of Total Amount % of Total Amount % of Total Verizon Communications Inc. $ 144.8 17.9% $ 182.1 20.6% $ 483.8 19.8% $ 566.9 21.8% Lumen Technologies (1) 134.4 16.6 164.1 18.6 441.5 18.0 412.7 15.9 AT&T Inc. 118.9 14.7 162.9 18.4 407.5 16.6 555.4 21.3 Comcast Corporation 143.6 17.7 131.3 14.9 393.0 16.0 401.6 15.4 Total other customers combined 268.6 33.1 243.7 27.6 722.7 29.5 665.5 25.6 Total contract revenues $ 810.3 100.0% $ 884.1 100.0% $ 2,448.5 100.0% $ 2,602.1 100.0% Total contract revenues by customer type during the three and nine months ended October 24, 2020 and October 26, 2019 were as follows (dollars in millions): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Amount % of Total Amount % of Total Amount % of Total Amount % of Total Telecommunications $ 721.2 89.0% $ 798.1 90.3% $ 2,193.9 89.6% $ 2,363.9 90.8% Underground facility locating 59.0 7.3 56.0 6.3 171.3 7.0 158 6.1 Electrical and gas utilities and other 30.1 3.7 30.0 3.4 83.3 3.4 80.2 3.1 Total contract revenues $ 810.3 100.0% $ 884.1 100.0% $ 2,448.5 100.0% $ 2,602.1 100.0%

Other Current Assets and Othe_2

Other Current Assets and Other Assets (Tables)	9 Months Ended
	Oct. 24, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Other Current Assets	Other current assets consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Prepaid expenses $ 22,745 $ 12,769 Deposits and other current assets 14,255 17,447 Restricted cash 1,372 1,556 Receivables on equipment sales 90 219 Other current assets $ 38,462 $ 31,991
Schedule of Non current Assets	Other assets consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Long-term contract assets $ 18,640 $ 22,653 Deferred financing costs 5,734 7,133 Restricted cash 3,731 3,753 Insurance recoveries/receivables for accrued insurance claims 12,506 4,864 Other non-current deposits and assets 7,767 9,035 Other assets $ 48,378 $ 47,438

Cash, Cash Equivalents and Re_2

Cash, Cash Equivalents and Restricted Cash (Tables)	9 Months Ended
	Oct. 24, 2020
Cash and Cash Equivalents [Abstract]
Schedule of Cash and Cash Equivalents	Amounts of cash, cash equivalents and restricted cash reported in the condensed consolidated statement of cash flows consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Cash and cash equivalents $ 12,036 $ 54,560 Restricted cash included in: Other current assets 1,372 1,556 Other assets 3,731 3,753 Cash, cash equivalents and restricted cash $ 17,139 $ 59,869
Schedule of Restricted Cash and Cash Equivalents	Amounts of cash, cash equivalents and restricted cash reported in the condensed consolidated statement of cash flows consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Cash and cash equivalents $ 12,036 $ 54,560 Restricted cash included in: Other current assets 1,372 1,556 Other assets 3,731 3,753 Cash, cash equivalents and restricted cash $ 17,139 $ 59,869

Property and Equipment (Tables)

Property and Equipment (Tables)	9 Months Ended
	Oct. 24, 2020
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment	Property and equipment consisted of the following (dollars in thousands): Estimated Useful Lives (Years) October 24, 2020 January 25, 2020 Land — $ 3,796 $ 4,024 Buildings 10-35 11,174 12,934 Leasehold improvements 1-10 16,945 17,151 Vehicles 1-5 616,397 626,307 Computer hardware and software 1-7 156,439 149,600 Office furniture and equipment 1-10 13,414 13,557 Equipment and machinery 1-10 309,345 312,244 Total 1,127,510 1,135,817 Less: accumulated depreciation (839,218) (759,207) Property and equipment, net $ 288,292 $ 376,610

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Oct. 24, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill consisted of the following balances as of October 24, 2020 and January 25, 2020. There was no change in the carrying amount of goodwill during the three months ended October 24, 2020, during the nine months ended October 24, 2020 there was a cha nge of $53.3 million, as the result of a goodwill impairment charge (dollars in thousands): October 24, 2020 January 25, 2020 Goodwill, gross $ 521,516 $ 521,516 Accumulated impairment losses (249,031) (195,767) Total $ 272,485 $ 325,749
Schedule of Intangible Assets	Our intangible assets consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Weighted Average Remaining Useful Lives (Years) Gross Carrying Amount Accumulated Amortization Intangible Assets, Net Gross Carrying Amount Accumulated Amortization Intangible Assets, Net Customer relationships 9.6 $ 312,017 $ 193,530 $ 118,487 $ 312,017 $ 178,411 $ 133,606 Trade names, finite 8.1 10,350 9,046 1,304 10,350 8,732 1,618 Trade name, indefinite — 4,700 — 4,700 4,700 — 4,700 Non-compete agreements — 200 200 — 200 179 21 $ 327,267 $ 202,776 $ 124,491 $ 327,267 $ 187,322 $ 139,945

Accrued Insurance Claims (Table

Accrued Insurance Claims (Tables)	9 Months Ended
	Oct. 24, 2020
Accrued Insurance Claims [Abstract]
Accrued Insurance Claims and Insurance Recoveries/Receivables	Amounts for total accrued insurance claims and insurance recoveries/receivables are as follows (dollars in thousands): October 24, 2020 January 25, 2020 Accrued insurance claims - current $ 43,623 $ 38,881 Accrued insurance claims - non-current 67,195 56,026 Accrued insurance claims $ 110,818 $ 94,907 Insurance recoveries/receivables: Non-current (included in Other assets) 12,506 4,864 Insurance recoveries/receivables $ 12,506 $ 4,864

Leases (Tables)

Leases (Tables)	9 Months Ended
	Oct. 24, 2020
Leases [Abstract]
Lease Cost, Supplemental Balance Sheet, and Supplmental Cash Flows	The following table summarizes the components of lease cost recognized in the condensed consolidated statements of operations for the three and nine months ended October 24, 2020 and October 26, 2019 (dollars in thousands): For the Three Months Ended For the Three Months Ended For the Nine Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Lease cost under long-term operating leases $ 8,804 $ 8,388 $ 17,691 $ 25,095 Lease cost under short-term operating leases 6,624 8,641 21,740 25,662 Variable lease cost under short-term and long-term operating leases (1) 743 933 12,499 3,182 Total lease cost $ 16,171 $ 17,962 $ 51,930 $ 53,939 (1) Variable lease cost primarily includes insurance, maintenance, and other operating expenses related to our leased office facilities. Our operating lease liabilities related to long-term operating leases were $66.4 million as of October 24, 2020 and $70.2 million as of January 25, 2020. Supplemental balance sheet information related to these liabilities is as follows: October 24, 2020 January 25, 2020 Weighted average remaining lease term 3.3 years 3.3 years Weighted average discount rate 4.9 % 5.2 % Supplemental cash flow information related to our long-term operating lease liabilities as of October 24, 2020 and October 26, 2019 is as follows (dollars in thousands): For the Three Months Ended For the Three Months Ended For the Nine Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Cash paid for amounts included in the measurement of lease liabilities $ 8,489 $ 8,271 $ 27,158 $ 23,076 Operating lease right-of-use assets obtained in exchange for operating lease liabilities $ 3,479 $ 6,486 $ 21,235 $ 19,777
Operating Lease Liability Maturity Schedule	As of October 24, 2020, maturities of our lease liabilities under our long-term operating leases for the next five fiscal years and thereafter are as follows (dollars in thousands): Fiscal Year Amount Remainder of 2021 $ 7,617 2022 27,552 2023 17,460 2024 10,238 2025 6,462 Thereafter 4,401 Total lease payments 73,730 Less: imputed interest (7,328) Total $ 66,402 As of January 25, 2020, the future minimum obligation by fiscal year for our operating leases with original noncancelable terms in excess of one year was as follows (dollars in thousands): Fiscal Year Amount 2021 $ 30,138 2022 22,274 2023 13,236 2024 7,916 2025 4,607 Thereafter 1,495 Total lease payments 79,666 Less: imputed interest (9,479) Total $ 70,187

Other Accrued Liabilities (Tabl

Other Accrued Liabilities (Tables)	9 Months Ended
	Oct. 24, 2020
Payables and Accruals [Abstract]
Schedule of Other Accrued Liabilities	Other accrued liabilities consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Accrued payroll and related taxes $ 30,899 $ 25,810 Accrued employee benefit and incentive plan costs 30,132 25,489 Accrued construction costs 25,881 27,690 Other current liabilities 20,480 19,786 Other accrued liabilities $ 107,392 $ 98,775

Debt (Tables)

Debt (Tables)	9 Months Ended
	Oct. 24, 2020
Debt Disclosure [Abstract]
Outstanding Indebtedness	Our outstanding indebtedness consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Credit Agreement - Revolving facility (matures October 2023) $ 85,000 $ — Credit Agreement - Term loan facility (matures October 2023) 427,500 444,375 0.75% convertible senior notes, net (mature September 2021) 55,621 422,526 568,121 866,901 Less: current portion (78,121) (22,500) Long-term debt $ 490,000 $ 844,401
Schedule Interest Rates for the Credit Agreement	Under our credit agreement, borrowings bear interest at the rates described below based upon our consolidated net leverage ratio, which is the ratio of our consolidated total funded debt reduced by unrestricted cash and equivalents in excess of $50.0 million to our trailing twelve-month consolidated EBITDA, as defined by the credit agreement. In addition, we incur certain fees for unused balances and letters of credit at the rates described below, also based upon our consolidated net leverage ratio. Borrowings - Eurodollar Rate Loans 1.25% - 2.00% plus LIBOR Borrowings - Base Rate Loans 0.25% - 1.00% plus administrative agent’s base rate (1) Unused Revolver Commitment 0.20% - 0.40% Standby Letters of Credit 1.25% - 2.00% Commercial Letters of Credit 0.625% -1.000% (1) The administrative agent’s base rate is described in our credit agreement as the highest of (i) the Federal Funds Rate plus 0.50%, (ii) the administrative agent’s prime rate, and (iii) the Eurodollar rate plus 1.00%. The weighted average interest rates and fees for balances under our credit agreement as of October 24, 2020 and January 25, 2020 were as follows: Weighted Average Rate End of Period October 24, 2020 January 25, 2020 Borrowings - Term loan facilities 1.77% 3.67% Borrowings - Revolving facility (1) 2.39% —% Standby Letters of Credit 1.63% 2.00% Unused Revolver Commitment 0.30% 0.40% (1) There were no outstanding borrowings under the revolving facility as of January 25, 2020.
Convertible Debt	The liability component of the Notes consisted of the following (dollars in thousands): October 24, 2020 January 25, 2020 Liability component Principal amount of 0.75% convertible senior notes due September 2021 $ 58,264 $ 460,000 Less: Debt discount (2,375) (33,744) Less: Debt issuance costs (268) (3,730) Net carrying amount of Notes $ 55,621 $ 422,526 The following table summarizes the fair value of the Notes, net of the debt discount and debt issuance costs. The fair value of the Notes is based on the closing trading price per $100 of the Notes as of the last day of trading for the respective periods (Level 2), which was $99.00 and $97.25 as of October 24, 2020 and January 25, 2020, respectively (dollars in thousands): October 24, 2020 January 25, 2020 Fair value of principal amount of Notes $ 57,681 $ 447,350 Less: Debt discount and debt issuance costs (2,643) (37,474) Fair value of Notes $ 55,038 $ 409,876

Other Income, Net (Tables)

Other Income, Net (Tables)	9 Months Ended
	Oct. 24, 2020
Other Income and Expenses [Abstract]
Schedule of Other Income, Net	The components of other income, net, were as follows (dollars in thousands): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Gain on sale of fixed assets $ 4,001 $ 2,241 $ 9,207 $ 13,785 Discount fee expense (432) (959) (1,706) (3,520) Miscellaneous income, net 139 125 420 846 Other income, net $ 3,708 $ 1,407 $ 7,921 $ 11,111

Stock-Based Awards (Tables)

Stock-Based Awards (Tables)	9 Months Ended
	Oct. 24, 2020
Share-based Payment Arrangement [Abstract]
Schedule of Stock-based Compensation Expense and Related Tax Benefit Recognized	Stock-based compensation expense and the related tax benefit recognized during the three and nine months ended October 24, 2020 and October 26, 2019 were as follows (dollars in thousands): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Stock-based compensation $ 3,796 $ 2,694 $ 10,490 $ 8,450 Income tax effect of stock-based compensation $ 944 $ 669 $ 2,606 $ 2,098
Schedule of Share-based Compensation, Stock Options Award Activity	The following table summarizes stock option award activity during the nine months ended October 24, 2020: Stock Options Shares Weighted Average Exercise Price Outstanding as of January 25, 2020 577,309 $ 36.85 Granted 63,304 $ 25.15 Options exercised (275,275) $ 19.71 Canceled — $ — Outstanding as of October 24, 2020 365,338 $ 47.74 Exercisable options as of October 24, 2020 244,215 $ 48.49
Schedule of Share-based Compensation, RSU and Performance RSU Activity	The following table summarizes RSU and Performance RSU award activity during the nine months ended October 24, 2020: Restricted Stock RSUs Performance RSUs Share Units Weighted Average Grant Date Fair Value Share Units Weighted Average Grant Date Fair Value Outstanding as of January 25, 2020 174,917 $ 65.05 639,738 $ 62.60 Granted 537,618 $ 25.74 65,538 $ 25.15 Share units vested (53,072) $ 65.48 (17,134) $ 70.14 Forfeited or canceled (13,206) $ 47.21 (258,524) $ 66.79 Outstanding as of October 24, 2020 646,257 $ 32.68 429,618 $ 54.06

Customer Concentration and Re_2

Customer Concentration and Revenue Information (Tables)	9 Months Ended
	Oct. 24, 2020
Risks and Uncertainties [Abstract]
Schedule that Represents A Significant Portion of the Company’s Customer Base and Each Over 10% of Total Revenue	Customers whose combined amounts of accounts receivable and contract assets, net, exceeded 10% of total combined accounts receivable and contract assets, net, as of October 24, 2020 or January 25, 2020 were as follows (dollars in millions): October 24, 2020 January 25, 2020 Amount % of Total Amount % of Total Verizon Communications Inc. $ 415.6 36.9% $ 440.2 41.8% Lumen Technologies (1) $ 198.9 17.6% $ 175.8 16.7% Comcast Corporation $ 156.2 13.9% $ 114.0 10.8% For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Amount % of Total Amount % of Total Amount % of Total Amount % of Total Verizon Communications Inc. $ 144.8 17.9% $ 182.1 20.6% $ 483.8 19.8% $ 566.9 21.8% Lumen Technologies (1) 134.4 16.6 164.1 18.6 441.5 18.0 412.7 15.9 AT&T Inc. 118.9 14.7 162.9 18.4 407.5 16.6 555.4 21.3 Comcast Corporation 143.6 17.7 131.3 14.9 393.0 16.0 401.6 15.4 Total other customers combined 268.6 33.1 243.7 27.6 722.7 29.5 665.5 25.6 Total contract revenues $ 810.3 100.0% $ 884.1 100.0% $ 2,448.5 100.0% $ 2,602.1 100.0% Total contract revenues by customer type during the three and nine months ended October 24, 2020 and October 26, 2019 were as follows (dollars in millions): For the Three Months Ended For the Nine Months Ended October 24, 2020 October 26, 2019 October 24, 2020 October 26, 2019 Amount % of Total Amount % of Total Amount % of Total Amount % of Total Telecommunications $ 721.2 89.0% $ 798.1 90.3% $ 2,193.9 89.6% $ 2,363.9 90.8% Underground facility locating 59.0 7.3 56.0 6.3 171.3 7.0 158 6.1 Electrical and gas utilities and other 30.1 3.7 30.0 3.4 83.3 3.4 80.2 3.1 Total contract revenues $ 810.3 100.0% $ 884.1 100.0% $ 2,448.5 100.0% $ 2,602.1 100.0%

Basis of Presentation (Details)

Basis of Presentation (Details)	9 Months Ended
	Oct. 24, 2020segment
Basis of Presentation [Abstract]
Number of reportable segments	1

Accounting Standards (Details)

Accounting Standards (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 65,912	$ 69,596
Operating lease liability related to long-term operating leases	$ 66,402	$ 70,187

Computation of Earnings Per C_3

Computation of Earnings Per Common Share - Basic and Diluted Earnings Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income available to common stockholders (numerator)	$ 33,926	$ 24,229	$ 38,532	$ 68,404
Weighted-average number of common shares (in shares)	31,878,583	31,502,543	31,744,199	31,480,759
Basic earnings per common share (in dollars per share)	$ 1.06	$ 0.77	$ 1.21	$ 2.17
Potential common stock arising from stock options, and unvested restricted share units (in shares)	546,717	324,302	362,462	330,746
Total shares-diluted (in shares)	32,425,300	31,826,845	32,106,661	31,811,505
Diluted earnings per common share (in dollars per share)	$ 1.05	$ 0.76	$ 1.20	$ 2.15
Anti-dilutive weighted shares excluded from the calculation of earnings per common share:
Anti-dilutive weighted shares excluded from the calculation of earnings per share (in shares)	1,440,924	10,251,008	4,477,819	10,267,737
Stock-based awards
Anti-dilutive weighted shares excluded from the calculation of earnings per common share:
Anti-dilutive weighted shares excluded from the calculation of earnings per share (in shares)	238,226	239,540	245,633	256,269
Convertible senior notes
Anti-dilutive weighted shares excluded from the calculation of earnings per common share:
Anti-dilutive weighted shares excluded from the calculation of earnings per share (in shares)	601,349	5,005,734	2,116,093	5,005,734
Note Warrant
Anti-dilutive weighted shares excluded from the calculation of earnings per common share:
Anti-dilutive weighted shares excluded from the calculation of earnings per share (in shares)	601,349	5,005,734	2,116,093	5,005,734

Computation of Earnings Per C_4

Computation of Earnings Per Common Share - Narratives (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
	Apr. 25, 2020	Oct. 24, 2020	Oct. 26, 2019	Sep. 15, 2015
Shares used in computing earnings per common share:
Proceeds from borrowings on senior credit agreement, including term loans		$ 773,000	$ 345,000
Convertible senior notes
Shares used in computing earnings per common share:
Anti-dilutive weighted shares excluded from the calculation, per share conversion price, threshold (in dollars per share)		$ 96.89
Note Warrant
Shares used in computing earnings per common share:
Anti-dilutive weighted shares excluded from the calculation, per share conversion price, threshold (in dollars per share)		$ 130.43
0.75% Convertible Senior Notes Due 2021
Shares used in computing earnings per common share:
Debt, interest rate (in percent)		0.75%
Warrant
Shares used in computing earnings per common share:
Proceeds from borrowings on senior credit agreement, including term loans	$ 25,000	$ 401,700
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (shares)				5,006

Accounts Receivable, Contract_3

Accounts Receivable, Contract Assets, and Contract Liabilities - Accounts Receivable (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jul. 25, 2020	Jan. 25, 2020	Oct. 26, 2019	Jul. 27, 2019	Jan. 26, 2019
Receivables [Abstract]
Trade accounts receivable	$ 367,980		$ 355,805
Unbilled accounts receivable	559,067		453,353
Retainage	13,645		12,669
Total	940,692		821,827
Less: allowance for doubtful accounts	(1,751)	$ (1,605)	(4,582)	$ (4,557)	$ (924)	$ (17,702)
Accounts receivable, net	$ 938,941		$ 817,245

Accounts Receivable, Contract_4

Accounts Receivable, Contract Assets, and Contract Liabilities - Change in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts at beginning of period	$ 1,605	$ 924	$ 4,582	$ 17,702
Provision for bad debt (recovery)	117	3,498	353	(7,015)
Amounts recovered (charged) against the allowance	29	135	(3,655)	(6,130)
Allowance for doubtful accounts at end of period	1,751	4,557	1,751	4,557
Cumulative Effect, Period Of Adoption, Adjustment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts at beginning of period			471
Allowance for doubtful accounts at end of period	$ 0	$ 0	0	$ 0
Windstream Corporation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts at beginning of period			$ 16,800

Accounts Receivable, Contract_5

Accounts Receivable, Contract Assets, and Contract Liabilities - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 24, 2020	Oct. 24, 2020	Jan. 25, 2020
Receivables [Abstract]
Net contract assets	$ 188,104	$ 188,104	$ 236,673
Contract liabilities, revenues recognized	$ 1,400	$ 13,100

Accounts Receivable, Contract_6

Accounts Receivable, Contract Assets, and Contract Liabilities - Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020
Receivables [Abstract]
Contract assets	$ 204,516	$ 253,005
Contract liabilities	16,412	16,332
Contract assets, net	$ 188,104	$ 236,673

Accounts Receivable, Contract_7

Accounts Receivable, Contract Assets, and Contract Liabilities - Customer Credit Concentration (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Oct. 24, 2020	Apr. 25, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019	Jan. 25, 2020
Concentration Risk
Amount	$ 938,941			$ 938,941		$ 817,245
% of Total	100.00%		100.00%	100.00%	100.00%
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | Verizon Communications Inc.
Concentration Risk
Amount	$ 415,600			$ 415,600		440,200
% of Total		41.80%		36.90%
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | Lumen Technologies(1)
Concentration Risk
Amount	198,900			$ 198,900		175,800
% of Total		16.70%		17.60%
Customer Concentration Risk | Trade Accounts Receivable and Costs and Estimated Earnings | Comcast Corporation
Concentration Risk
Amount	$ 156,200			$ 156,200		$ 114,000
% of Total		10.80%		13.90%

Other Current Assets and Othe_3

Other Current Assets and Other Assets - Current (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses	$ 22,745	$ 12,769
Deposits and other current assets	14,255	17,447
Restricted cash	1,372	1,556
Receivables on equipment sales	90	219
Other current assets	$ 38,462	$ 31,991

Other Current Assets and Othe_4

Other Current Assets and Other Assets - Non-current (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Long-term contract assets	$ 18,640	$ 22,653
Deferred financing costs	5,734	7,133
Restricted cash	3,731	3,753
Insurance recoveries/receivables for accrued insurance claims	12,506	4,864
Other non-current deposits and assets	7,767	9,035
Other assets	$ 48,378	$ 47,438

Cash, Cash Equivalents and Re_3

Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020	Oct. 26, 2019	Jan. 26, 2019
Cash and Cash Equivalents [Abstract]
Cash and equivalents	$ 12,036	$ 54,560
Restricted cash included in:
Other current assets	1,372	1,556
Other assets	3,731	3,753
Cash, cash equivalents and restricted cash	$ 17,139	$ 59,869	$ 17,146	$ 134,151

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 24, 2020	Jan. 25, 2020
Property, Plant and Equipment [Line Items]
Total	$ 1,127,510	$ 1,135,817
Less: accumulated depreciation	(839,218)	(759,207)
Property and equipment, net	288,292	376,610
Land
Property, Plant and Equipment [Line Items]
Total	3,796	4,024
Buildings
Property, Plant and Equipment [Line Items]
Total	$ 11,174	12,934
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	10 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	35 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total	$ 16,945	17,151
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	1 year
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	10 years
Vehicles
Property, Plant and Equipment [Line Items]
Total	$ 616,397	626,307
Vehicles | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	1 year
Vehicles | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	5 years
Computer hardware and software
Property, Plant and Equipment [Line Items]
Total	$ 156,439	149,600
Computer hardware and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	1 year
Computer hardware and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	7 years
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Total	$ 13,414	13,557
Office furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	1 year
Office furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	10 years
Equipment and machinery
Property, Plant and Equipment [Line Items]
Total	$ 309,345	$ 312,244
Equipment and machinery | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	1 year
Equipment and machinery | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	10 years

Property and Equipment - Deprec

Property and Equipment - Depreciation Expense and Repairs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 37.3	$ 42.1	$ 116.9	$ 125

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019	Jan. 25, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill impairment charge			$ 53,264	$ 0
Goodwill	$ 272,485		272,485		$ 325,749
Amortization of intangible assets	$ 5,000	$ 5,300	$ 15,500	$ 15,900

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, gross	$ 521,516	$ 521,516
Accumulated impairment losses	(249,031)	(195,767)
Total	$ 272,485	$ 325,749

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019	Jan. 25, 2020
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 5,000	$ 5,300	$ 15,500	$ 15,900
Intangible Assets, Gross (Excluding Goodwill)	327,267		327,267		$ 327,267
Accumulated Amortization	202,776		202,776		187,322
Intangible Assets, Net	124,491		124,491		139,945
UtiliQuest
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	4,700		4,700		4,700
Accumulated Amortization	0		0		0
Intangible Assets, Net	$ 4,700		4,700		4,700
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Usesul life	9 years 7 months 6 days
Intangible Assets, Gross (Excluding Goodwill)	$ 312,017		312,017		312,017
Accumulated Amortization	193,530		193,530		178,411
Intangible Assets, Net	$ 118,487		118,487		133,606
Trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Usesul life	8 years 1 month 6 days
Intangible Assets, Gross (Excluding Goodwill)	$ 10,350		10,350		10,350
Accumulated Amortization	9,046		9,046		8,732
Intangible Assets, Net	1,304		1,304		1,618
Non-compete agreements
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	200		200		200
Accumulated Amortization	200		200		179
Intangible Assets, Net	$ 0		$ 0		$ 21

Accrued Insurance Claims - Narr

Accrued Insurance Claims - Narratives (Details)	9 Months Ended
	Oct. 24, 2020USD ($)state
Accrued Insurance Claims [Line Items]
Insurance Liability, Annual Retained Risk of Loss, Under Employee Health Plan Per Participant, Maximum Threshold	$ 475,000
Number of states with state-sponsored insurance fund | state	2
Insurance liability, annual retained risk loss	$ 450,000
Decrease in accrued insurance claims	7,600,000
Insurance Coverage Treshold Per Policy	5,000,000
Treshold One
Accrued Insurance Claims [Line Items]
Aggregate stop loss coverage for automobile liability, general liability, and workers' compensation claims before adjustment	85,800,000
Treshold Two
Accrued Insurance Claims [Line Items]
Aggregate stop loss coverage for automobile liability, general liability, and workers' compensation claims before adjustment	11,500,000
Treshold Three
Accrued Insurance Claims [Line Items]
Aggregate stop loss coverage for automobile liability, general liability, and workers' compensation claims before adjustment	10,000,000
Maximum
Accrued Insurance Claims [Line Items]
Retained risk of loss, general liability and workers' compensation, maximum automobile liability	$ 1,000,000

Accrued Insurance Claims (Detai

Accrued Insurance Claims (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020
Accrued Insurance Claims [Abstract]
Accrued insurance claims - current	$ 43,623	$ 38,881
Accrued insurance claims - non-current	67,195	56,026
Accrued insurance claims	110,818	94,907
Insurance recoveries/receivables:
Non-current (included in Other assets)	12,506	4,864
Insurance Settlements Receivable	$ 12,506	$ 4,864

Leases - Narratives (Details)

Leases - Narratives (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020
Lessee, Lease, Description
Operating lease reneewal term	5 years
Operating lease liability related to long-term operating leases	$ 66,402	$ 70,187
Operating lease that have yet to commence	$ 500
Minimum
Lessee, Lease, Description
Operating lease term	1 year
Maximum
Lessee, Lease, Description
Operating lease term	9 years

Leases - Lease Cost and Supplem

Leases - Lease Cost and Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019	Jan. 25, 2020
Leases [Abstract]
Lease cost under long-term operating leases	$ 8,804	$ 8,388	$ 17,691	$ 25,095
Lease cost under short-term operating leases	6,624	8,641	21,740	25,662
Variable lease cost under short-term and long-term operating leases	743	933	12,499	3,182
Total lease cost	$ 16,171	$ 17,962	$ 51,930	$ 53,939
Operating Lease, Weighted Average Remaining Lease Term	3 years 3 months 18 days		3 years 3 months 18 days		3 years 3 months 18 days
Weighted average discount rate (percent)	4.90%		4.90%		5.20%

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	$ 8,489	$ 8,271	$ 27,158	$ 23,076
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 3,479	$ 6,486	$ 21,235	$ 19,777

Leases - Operating Lease Liabil

Leases - Operating Lease Liability Maturity Schedule (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020
Operating Lease Liabilities After Adoption
Remainder of 2021	$ 7,617
2021		$ 30,138
2022	27,552	22,274
2023	17,460	13,236
2024	10,238	7,916
2025	6,462	4,607
Thereafter	4,401	1,495
Total lease payments	73,730	79,666
Less: imputed interest	(7,328)	(9,479)
Total	$ 66,402	$ 70,187

Other Accrued Liabilities (Deta

Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Oct. 24, 2020	Jan. 25, 2020
Payables and Accruals [Abstract]
Accrued payroll and related taxes	$ 30,899	$ 25,810
Accrued employee benefit and incentive plan costs	30,132	25,489
Accrued construction costs	25,881	27,690
Other current liabilities	20,480	19,786
Other accrued liabilities	$ 107,392	$ 98,775

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Jan. 25, 2020
Debt Instrument [Line Items]
Debt and capital lease obligations	$ 568,121		$ 866,901
Less: current portion	(78,121)		(22,500)
Long-term debt	490,000		844,401
Proceeds from borrowings on senior credit agreement, including term loans	773,000	$ 345,000
0.75% Convertible Senior Notes Due 2021
Debt Instrument [Line Items]
Debt and capital lease obligations	$ 55,621		422,526
Debt, interest rate (in percent)	0.75%
Credit Agreement - Revolving facility (matures April 2020)
Debt Instrument [Line Items]
Debt and capital lease obligations	$ 85,000		0
Credit Agreement - Term Loan (matures April 2020)
Debt Instrument [Line Items]
Debt and capital lease obligations	$ 427,500		$ 444,375

Debt - Senior Credit Agreement

Debt - Senior Credit Agreement (Details)	Sep. 15, 2015USD ($)	Oct. 24, 2020USD ($)	Oct. 24, 2020USD ($)	Jan. 25, 2020USD ($)	Oct. 19, 2018USD ($)
Line of Credit Facility [Line Items]
Letters of credit outstanding amount		$ 52,200,000	$ 52,200,000	$ 52,300,000
Additional borrowing availability		575,000,000	575,000,000	$ 287,000,000
Standby Letters of Credit
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity					$ 200,000,000
Incremental Facility, Minimum
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 350,000,000
Credit Agreement - Term Loan (matures April 2020)
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity					450,000,000
Debt instrument, covenant compliance, consolidated leverage ratio, maximum	2.25
Unrestricted cash and cash equivalents threshold		$ 50,000,000	$ 50,000,000
Credit Agreement - Revolving facility (matures April 2020)
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity	$ 450,000,000				$ 750,000,000
Unutilized commitment fee (in percent)			0.30%	0.40%
Minimum
Line of Credit Facility [Line Items]
Debt instrument, covenant compliance, consolidated leverage ratio, maximum		3.50
Debt instrument, covenant compliance, consolidated interest coverage ratio, maximum		3
Minimum | Standby Letters of Credit
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)			1.25%
Minimum | Credit Agreement - Revolving facility (matures April 2020)
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)			0.20%
Maximum
Line of Credit Facility [Line Items]
Debt instrument, covenant compliance, consolidated leverage ratio, maximum		1
Debt instrument, covenant compliance, consolidated interest coverage ratio, maximum		1
Maximum | Standby Letters of Credit
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)			2.00%
Maximum | Credit Agreement - Revolving facility (matures April 2020)
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)			0.40%
0.75% Convertible Senior Notes Due 2021
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 485,000,000	$ 58,264,000	$ 58,264,000	$ 460,000,000
Outstanding debt threshold		$ 250,000,000	$ 250,000,000

Debt - Interest Rates of the Cr

Debt - Interest Rates of the Credit Agreement (Details)	9 Months Ended	12 Months Ended
	Oct. 24, 2020	Jan. 25, 2020
Credit Agreement - Revolving facility (matures April 2020)
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)	0.30%	0.40%
Minimum | Standby Letters of Credit
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)	1.25%
Minimum | Commercial Letters of Credit
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)	0.625%
Minimum | Credit Agreement - Revolving facility (matures April 2020)
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)	0.20%
Maximum | Standby Letters of Credit
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)	2.00%
Maximum | Commercial Letters of Credit
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)	1.00%
Maximum | Credit Agreement - Revolving facility (matures April 2020)
Line of Credit Facility [Line Items]
Unutilized commitment fee (in percent)	0.40%
Eurodollar
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Eurodollar | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.25%
Eurodollar | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.00%
Administrative Agent Base Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.25%
Administrative Agent Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Federal Funds
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%

Debt - Interest Rates at Period

Debt - Interest Rates at Period End (Details) - USD ($)	9 Months Ended	12 Months Ended
	Oct. 24, 2020	Jan. 25, 2020
Line of Credit Facility [Line Items]
Debt Instrument Fair Value, Per Stated Incremental Portion on Principal	$ 99	$ 97.25
Standby Letters of Credit
Line of Credit Facility [Line Items]
Debt instrument, effective interest rate	1.63%	2.00%
Line of credit		$ 0
Credit Agreement - Term Loan (matures April 2020)
Line of Credit Facility [Line Items]
Debt instrument, effective interest rate	1.77%	3.67%
Credit Agreement - Revolving facility (matures April 2020)
Line of Credit Facility [Line Items]
Debt instrument, effective interest rate	2.39%	0.00%
Unutilized commitment fee (in percent)	0.30%	0.40%

Debt - Convertible Senior Notes

Debt - Convertible Senior Notes Due 2021 (Details)	Sep. 15, 2015USD ($)$ / shares	Oct. 24, 2020USD ($)	Apr. 25, 2020USD ($)	Oct. 26, 2019USD ($)	Oct. 29, 2016trading_day	Oct. 24, 2020USD ($)	Oct. 26, 2019USD ($)	Jan. 25, 2020USD ($)
Debt Instrument [Line Items]
Amortization of debt discount						$ 6,732,000	$ 15,016,000
Repayments of Long-term Lines of Credit						704,875,000	242,000,000
Gain on debt extinguishment						$ 12,046,000	0
0.75% Convertible Senior Notes Due 2021
Debt Instrument [Line Items]
Debt, interest rate (in percent)		0.75%				0.75%
Debt intrument, conversion installments amount	$ 1,000
Debt instrument,conversion ratio	10.3211
Debt instrument, face amount	$ 485,000,000	$ 58,264,000				$ 58,264,000		$ 460,000,000
Debt instrument, convertible, conversion price (per share) | $ / shares	$ 96.89
Convertible debt, trading day threshold | trading_day					20
Convertible debt, consecutive trading day threshold | trading_day					30
Convertible debt, percentage of stock trigger price threshold					130.00%
Debt instrument conversion trigger price | $ / shares	$ 125.96
Convertible debt, measurement period for percentage of product sale price of common stock and applicable conversion threshold					98.00%
Convertible debt, comparable yield		5.50%
Amortization of debt discount		$ 600,000		$ 5,100,000		6,700,000	$ 15,000,000
Convertible Debt		55,621,000				55,621,000		422,526,000
Unamortized discount		2,375,000				2,375,000		33,744,000
Debt issuance cost		268,000				268,000		3,730,000
Repayments of Long-term Lines of Credit		$ 371,400,000	$ 24,300,000
Gain on debt extinguishment			$ 100,000			$ 12,000,000
Standby Letters of Credit
Debt Instrument [Line Items]
Line of credit								$ 0

Debt - Components of the Conver

Debt - Components of the Convertible Notes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019	Jan. 25, 2020	Sep. 15, 2015
Debt Instrument [Line Items]
Equity component of 0.75% senior convertible notes due 2021, net	$ 112,600,000		$ 112,600,000
Amortization of debt discount			6,732,000	$ 15,016,000
Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Debt instrument, face amount	57,681,000		57,681,000		$ 447,350,000
Less: Debt discount and debt issuance costs	(2,643,000)		(2,643,000)		(37,474,000)
Net carrying amount of Notes	55,038,000		55,038,000		409,876,000
0.75% Convertible Senior Notes Due 2021
Debt Instrument [Line Items]
Debt instrument, face amount	58,264,000		58,264,000		460,000,000	$ 485,000,000
Debt Instrument, Unamortized Discount	(2,375,000)		(2,375,000)		(33,744,000)
Debt issuance cost	(268,000)		(268,000)		(3,730,000)
Net carrying amount of Notes	55,621,000		55,621,000		$ 422,526,000
Amortization of debt discount	$ 600,000	$ 5,100,000	$ 6,700,000	$ 15,000,000

Debt - Convertible Note Hedge a

Debt - Convertible Note Hedge and Warrant Transactions (Details) - $ / shares shares in Thousands	Oct. 24, 2020	Sep. 15, 2015
Convertible senior notes
Debt Instrument [Line Items]
Anti-dilutive weighted shares excluded from the calculation, per share conversion price, threshold (in dollars per share)	$ 96.89
Note Warrant
Debt Instrument [Line Items]
Anti-dilutive weighted shares excluded from the calculation, per share conversion price, threshold (in dollars per share)	$ 130.43
Warrant
Debt Instrument [Line Items]
Class of Warrant or Right, Unissued (shares)	601
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (shares)		5,006

Income Taxes - Narratives (Deta

Income Taxes - Narratives (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Income Tax Disclosure [Abstract]
Effective tax rate	26.20%	21.30%	41.20%	27.10%
CARES Act tax benefit, tax loss carryback			$ 2.6

Other Income, Net (Details)

Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Other Income and Expenses [Abstract]
Gain on sale of fixed assets	$ 4,001	$ 2,241	$ 9,207	$ 13,785
Discount fee expense	(432)	(959)	(1,706)	(3,520)
Miscellaneous income, net	139	125	420	846
Other income, net	$ 3,708	$ 1,407	$ 7,921	$ 11,111

Capital Stock (Details)

Capital Stock (Details) - USD ($) $ in Millions	Oct. 24, 2020	Aug. 24, 2020
Stockholders' Equity Note [Abstract]
Amount authorized to repurchase shares		$ 100
Remaining authorized repurchase amount	$ 100

Stock-Based Awards - Tax Benefi

Stock-Based Awards - Tax Benefit Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Share-based Payment Arrangement [Abstract]
Net tax (deficiency) benefit	$ 200	$ 200	$ 200	$ (800)
Stock-based compensation			10,490	8,450
Stock-based compensation	3,796	2,694	10,490	8,450
Income tax effect of stock-based compensation	$ 944	$ 669	$ 2,606	$ 2,098

Stock-Based Awards - Narratives

Stock-Based Awards - Narratives (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019	Jan. 25, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net tax (deficiency) benefit	$ 0.2	$ 0.2	$ 0.2	$ (0.8)
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock options	$ 1.9		1.9
Total compensation cost not yet recognized, period for recognition	2 years 6 months
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock options	$ 16.6		$ 16.6
Total compensation cost not yet recognized, period for recognition	2 years 8 months 12 days
Granted (in shares)			537,618
Shares outstanding	646,257		646,257		174,917
Shares canceled (in shares)			13,206
Performance RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock options	$ 7.2		$ 7.2
Total compensation cost not yet recognized, period for recognition	1 year 2 months 12 days
Compensation expense	$ 11.2		$ 11.2
Granted (in shares)			65,538
Shares outstanding	429,618		429,618		639,738
Shares canceled (in shares)			258,524
Target Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding (in shares)			32,769
Shares outstanding	286,151		286,151
Shares canceled (in shares)			23,141
Supplemental Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			32,769
Shares outstanding	143,467		143,467
Shares canceled (in shares)			11,336

Stock-Based Awards - Stock Opti

Stock-Based Awards - Stock Options (Details) - Stock Options - $ / shares	9 Months Ended
	Oct. 24, 2020
Stock Options, Outstanding [Roll Forward]
Beginning balance (in shares)	577,309
Granted (in shares)	63,304
Options exercised (in shares)	(275,275)
Canceled (in shares)	0
Ending balance (in shares)	365,338
Exercisable options (in shares)	244,215
Stock Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Beginning balance (in dollars per shares)	$ 36.85
Options granted (in dollars per shares)	25.15
Options exercised (in dollars per shares)	19.71
Canceled (in dollars per shares)	0
Ending balance (in dollars per shares)	47.74
Weighted average remaining contractual life, shares exercisable (In years)	$ 48.49

Stock-Based Awards - RSU's and

Stock-Based Awards - RSU's and Performance RSU's (Details)	9 Months Ended
	Oct. 24, 2020$ / sharesshares
Target Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding [Roll Forward]
Forfeited or canceled (in shares)	(23,141)
Ending balance (in shares)	286,151
RSUs
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding [Roll Forward]
Beginning balance (in shares)	174,917
Granted (in shares)	537,618
Share units vested (in shares)	(53,072)
Forfeited or canceled (in shares)	(13,206)
Ending balance (in shares)	646,257
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value [Roll Forward]
Beginning balance (in dollars per shares) | $ / shares	$ 65.05
Granted (in dollars per shares) | $ / shares	25.74
Share units vested (in dollars per shares) | $ / shares	65.48
Forfeited or canceled (in dollars per shares) | $ / shares	47.21
Ending balance (in dollars per shares) | $ / shares	$ 32.68
Performance RSUs
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding [Roll Forward]
Beginning balance (in shares)	639,738
Granted (in shares)	65,538
Share units vested (in shares)	(17,134)
Forfeited or canceled (in shares)	(258,524)
Ending balance (in shares)	429,618
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value [Roll Forward]
Beginning balance (in dollars per shares) | $ / shares	$ 62.60
Granted (in dollars per shares) | $ / shares	25.15
Share units vested (in dollars per shares) | $ / shares	70.14
Forfeited or canceled (in dollars per shares) | $ / shares	66.79
Ending balance (in dollars per shares) | $ / shares	$ 54.06
Supplemental Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding [Roll Forward]
Granted (in shares)	32,769
Forfeited or canceled (in shares)	(11,336)
Ending balance (in shares)	143,467

Customer Concentration and Re_3

Customer Concentration and Revenue Information - Narratives (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020USD ($)customer	Oct. 26, 2019USD ($)	Oct. 24, 2020USD ($)customerRate	Oct. 26, 2019USD ($)Rate	Jan. 25, 2020USD ($)
Concentration Risk
Number of customers classified as highly concentrated | customer	5		5
% of Total	100.00%	100.00%	100.00%	100.00%
Amount	$ 938,941		$ 938,941		$ 817,245
Revenue from Contract with Customer, Excluding Assessed Tax	$ 810,256	$ 884,115	$ 2,448,500	$ 2,602,079
Revenue Benchmark | Customer Concentration Risk
Concentration Risk
% of Total			10.00%
Revenue Benchmark | Customer Concentration Risk | Five Unnamed Customers
Concentration Risk
% of Total | Rate			75.60%	78.70%

Customer Concentration and Re_4

Customer Concentration and Revenue Information - Revenue Concentration Risk (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Concentration Risk
Contract revenues	$ 810,256	$ 884,115	$ 2,448,500	$ 2,602,079
% of Total	100.00%	100.00%	100.00%	100.00%
Revenue Benchmark | Customer Concentration Risk
Concentration Risk
% of Total			10.00%
Revenue Benchmark | Customer Concentration Risk | Five Unnamed Customers
Concentration Risk
% of Total			75.60%	78.70%
Revenue Benchmark | Customer Concentration Risk | Verizon Communications Inc.
Concentration Risk
Contract revenues	$ 144,800	$ 182,100	$ 483,800	$ 566,900
% of Total	17.90%	20.60%	19.80%	21.80%
Revenue Benchmark | Customer Concentration Risk | Lumen Technologies(1)
Concentration Risk
Contract revenues	$ 134,400	$ 164,100	$ 441,500	$ 412,700
% of Total	16.60%	18.60%	18.00%	15.90%
Revenue Benchmark | Customer Concentration Risk | AT&T Inc.
Concentration Risk
Contract revenues	$ 118,900	$ 162,900	$ 407,500	$ 555,400
% of Total	14.70%	18.40%	16.60%	21.30%
Revenue Benchmark | Customer Concentration Risk | Comcast Corporation
Concentration Risk
Contract revenues	$ 143,600	$ 131,300	$ 393,000	$ 401,600
% of Total	17.70%	14.90%	16.00%	15.40%
Revenue Benchmark | Customer Concentration Risk | Total other customers combined
Concentration Risk
Contract revenues	$ 268,600	$ 243,700	$ 722,700	$ 665,500
% of Total	33.10%	27.60%	29.50%	25.60%

Customer Concentration and Re_5

Customer Concentration and Revenue Information - Customer Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 24, 2020	Oct. 26, 2019	Oct. 24, 2020	Oct. 26, 2019
Concentration Risk
Contract revenues	$ 810,256	$ 884,115	$ 2,448,500	$ 2,602,079
% of Total	100.00%	100.00%	100.00%	100.00%
Customer Concentration Risk | Revenue Benchmark
Concentration Risk
% of Total			10.00%
Customer Concentration Risk | Revenue Benchmark | Telecommunications
Concentration Risk
Contract revenues	$ 721,200	$ 798,100	$ 2,193,900	$ 2,363,900
% of Total	89.00%	90.30%	89.60%	90.80%
Customer Concentration Risk | Revenue Benchmark | Underground facility locating
Concentration Risk
Contract revenues	$ 59,000	$ 56,000	$ 171,300	$ 158,000
% of Total	7.30%	6.30%	7.00%	6.10%
Customer Concentration Risk | Revenue Benchmark | Electrical and gas utilities and other
Concentration Risk
Contract revenues	$ 30,100	$ 30,000	$ 83,300	$ 80,200
% of Total	3.70%	3.40%	3.40%	3.10%
Five Unnamed Customers | Customer Concentration Risk | Revenue Benchmark
Concentration Risk
% of Total			75.60%	78.70%

Commitment and Contingencies -

Commitment and Contingencies - Narratives (Details) - USD ($) $ in Millions	1 Months Ended
	Dec. 31, 2016	Oct. 24, 2020	Jan. 25, 2020	Oct. 28, 2017
Loss Contingencies [Line Items]
Loss contingency, estimated loss				$ 13
Loss contingency accrual, payments	$ 0.1
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 23.4	$ 23.4
Letters of credit outstanding amount		52.2	52.3
Performance Guarantee and Surety Bond [Member]
Loss Contingencies [Line Items]
Guarantor obligations, carrying value		$ 212.2	$ 156.1