XML 67 R55.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Debt Senior Credit Agreement (Details) |  | 3 Months Ended |
--- | --- | --- | ---
Sep. 09, 2015 USD ($) | Apr. 23, 2016 USD ($) | Jul. 25, 2015 USD ($)
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum |  | 3.50 |
Letters of credit outstanding amount |  | $ 57,700,000 | $ 54,400,000
Debt Instrument, Covenant Compliance, Consolidated Interest Coverage Ratio, Maximum |  | 3.00 |
Additional borrowing availability |  | $ 178,300,000 | 300,300,000
Standby Letters of Credit |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit current borrowing capacity | $ 200,000,000 |  |
Letters of credit outstanding amount |  | $ 57,700,000 | $ 54,400,000
Credit Agreement - Term Loan (matures April 2020) |  |  |
Line of Credit Facility [Line Items] |  |  |
Debt Instrument, Face Amount | $ 150,000,000 |  |
Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum | 2.25 |  |
Credit Agreement - Revolving facility (matures April 2020) |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit current borrowing capacity | $ 450,000,000 |  |

X
- Definition Debt Instrument, Covenant Compliance, Consolidated Interest Coverage Ratio, Maximum + References No definition available. + Details
Name: | dy_DebtInstrumentCovenantComplianceConsolidatedInterestCoverageRatioMaximum
Namespace Prefix: | dy_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum + References No definition available. + Details
Name: | dy_DebtInstrumentCovenantComplianceConsolidatedLeverageRatioMaximum
Namespace Prefix: | dy_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- 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 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: 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 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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 + Details
Name: | us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |