XML 84 R72.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Subsequent Events (Details) |  |  | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
May. 20, 2016 USD ($) | Sep. 09, 2015 USD ($) | Apr. 23, 2016 | May. 26, 2016 USD ($) | Apr. 26, 2016 USD ($)
Subsequent Event [Line Items] |  |  |  |  |
Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum |  |  | 3.50 |  |
Subsequent Event [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  | $ 100,000,000
Remaining authorized repurchase amount |  |  |  | $ 100,000,000 |
Credit Agreement - Term Loan (matures April 2020) |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  | $ 150,000,000 |  |  |
Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum |  | 2.25 |  |  |
Credit Agreement - Term Loan (matures April 2020) | Subsequent Event [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Debt Instrument, Increase (Decrease), Net | $ 200,000,000 |  |  |  |
Debt Instrument, Face Amount | $ 350,000,000.0 |  |  |  |
Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum | 2.25 |  |  |  |
Incremental Facility, Minimum [Member] | Subsequent Event [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Debt Instrument, Face Amount | $ 150,000,000.0 |  |  |  |

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 Net increase or decrease in the carrying amount of the debt instrument for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
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=dy_IncrementalFacilityMinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |