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v2.4.1.9

Debt (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 24, 2015 | Jul. 26, 2014
Debt Instrument [Line Items] |  |
Debt and capital lease obligations | $ 433,918,000 us-gaap_DebtAndCapitalLeaseObligations | $ 457,801,000 us-gaap_DebtAndCapitalLeaseObligations
Long-term debt premium on 7.125% senior subordinated notes (amortizes to interest expense through January 2021) | 3,000,000 us-gaap_DebtInstrumentUnamortizedPremium | 3,200,000 us-gaap_DebtInstrumentUnamortizedPremium
Senior Subordinated Notes | 7.125% Senior Subordinated Notes Due 2021 |  |
Debt Instrument [Line Items] |  |
Debt and capital lease obligations | 277,500,000 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = dy_SevenPointOneTwoFivePercentSeniorSubordinatedNotesDue2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorSubordinatedNotesMember | 277,500,000 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = dy_SevenPointOneTwoFivePercentSeniorSubordinatedNotesDue2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorSubordinatedNotesMember
Debt, interest rate (in percent) | 7.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dy_SevenPointOneTwoFivePercentSeniorSubordinatedNotesDue2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorSubordinatedNotesMember | 7.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dy_SevenPointOneTwoFivePercentSeniorSubordinatedNotesDue2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorSubordinatedNotesMember
Long-term debt premium on 7.125% senior subordinated notes (amortizes to interest expense through January 2021) | 3,043,000 us-gaap_DebtInstrumentUnamortizedPremium / us-gaap_DebtInstrumentAxis = dy_SevenPointOneTwoFivePercentSeniorSubordinatedNotesDue2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorSubordinatedNotesMember | 3,238,000 us-gaap_DebtInstrumentUnamortizedPremium / us-gaap_DebtInstrumentAxis = dy_SevenPointOneTwoFivePercentSeniorSubordinatedNotesDue2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorSubordinatedNotesMember
Long-term debt, fair value | 288,900,000 us-gaap_LongTermDebtFairValue / us-gaap_DebtInstrumentAxis = dy_SevenPointOneTwoFivePercentSeniorSubordinatedNotesDue2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorSubordinatedNotesMember | 297,600,000 us-gaap_LongTermDebtFairValue / us-gaap_DebtInstrumentAxis = dy_SevenPointOneTwoFivePercentSeniorSubordinatedNotesDue2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorSubordinatedNotesMember
Senior Credit Agreement - Term Loan (matures December 2017) | Credit Agreement, December 3, 2012, Maturing December 2017 |  |
Debt Instrument [Line Items] |  |
Debt and capital lease obligations | 109,375,000 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorLoansMember | 114,063,000 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorLoansMember
Revolving Credit Facility |  |
Credit facility amount | 125,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorLoansMember |
Debt Instrument, Interest Rate at Period End | 2.17%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorLoansMember | 2.15%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorLoansMember
Senior Credit Agreement - Revolving facility (matures December 2017) | Credit Agreement, December 3, 2012, Maturing December 2017 |  |
Debt Instrument [Line Items] |  |
Debt and capital lease obligations | 44,000,000 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember | 63,000,000 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember
Revolving Credit Facility |  |
Line of credit current borrowing capacity | 275,000,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |
Debt Instrument, Interest Rate at Period End | 2.36%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember | 2.55%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember
Unutilized commitment fee (in percent) | 0.35%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember | 0.35%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember
Additional borrowing availability | 176,600,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember | 162,600,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember
Senior Credit Agreement - Revolving facility (matures December 2017) | Credit Agreement, December 3, 2012, Maturing December 2017 | Standby Letters of Credit |  |
Revolving Credit Facility |  |
Line of credit current borrowing capacity | 150,000,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |
Letters of credit outstanding amount | 54,400,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember | 49,400,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember
Unutilized commitment fee (in percent) | 2.00%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember | 2.00%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember / us-gaap_DebtInstrumentAxis = dy_CreditAgreementDecember32012MaturingDecember2017Member / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember
Debt Premium | 7.125% Senior Subordinated Notes Due 2021 |  |
Debt Instrument [Line Items] |  |
Debt and capital lease obligations | $ 280,500,000 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = dy_SevenPointOneTwoFivePercentSeniorSubordinatedNotesDue2021Member / dy_DebtPremiumAxis = dy_DebtPremiumMember | $ 280,700,000 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = dy_SevenPointOneTwoFivePercentSeniorSubordinatedNotesDue2021Member / dy_DebtPremiumAxis = dy_DebtPremiumMember

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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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Balance Type: | credit
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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