XML 77 R49.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Accrued Insurance Claims (Details) (USD $) | Oct. 25, 2014 | Jul. 26, 2014 | Oct. 25, 2014 Maximum | Jul. 25, 2015 Scenario, Forecast
--- | --- | --- | --- | ---
Accrued Insurance Claims [Line Items] |  |  |  |
Retained risk of loss, general liability and workers' compensation, maximum automobile liability |  |  | $ 1,000,000 |
Aggregate stop loss coverage for automobile liability, general liability, and workers' compensation claims before adjustment |  |  |  | 59,500,000
Insurance liability, annual retained risk loss | 250,000 |  |  |
Retained risk of loss per participant for employee health plan for claim amounts that aggregate across all participants in excess of $250,000 | 550,000 |  |  |
Health plan participant threshold | 250,000 |  |  |
Amounts expected to be paid beyond one year: |  |  |  |
Accrued Insurance | 69,700,000 | 66,000,000 |  |
Accrued insurance claims, Noncurrent | $ 36,189,000 | $ 33,782,000 |  |

X
- Details
Name: | dy_AccruedInsuranceClaimsLineItems
Namespace Prefix: | dy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from auto liability, general liability, workers compensation, employee group health, and damage claims. Used to reflect the Noncurrent portion of the liabilities. + References No definition available. + Details
Name: | dy_AccruedInsuranceClaimsNoncurrent
Namespace Prefix: | dy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | dy_AccruedInsuranceClaimsNoncurrentAbstract
Namespace Prefix: | dy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate Stop Loss Coverage for Automobile Liability, General Liability, and Workers' Compensation Claims Before Adjustment Increase + References No definition available. + Details
Name: | dy_AggregateStopLossCoverageforAutomobileLiabilityGeneralLiabilityandWorkersCompensationClaimsBeforeAdjustmentIncrease
Namespace Prefix: | dy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The maximum retained risk of loss per occurrence for automobile liability. + References No definition available. + Details
Name: | dy_AutomobileInsuranceLiabilityGeneralLiabilityAndWorkersCompensation
Namespace Prefix: | dy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Annual retained risk of loss under the employee health plan. + References No definition available. + Details
Name: | dy_InsuranceLiabilityAnnualRetainedRiskOfLossUnderEmployeeHealthPlanPerParticipant
Namespace Prefix: | dy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Threshold for retained risk of loss per participant for employee health plan + References No definition available. + Details
Name: | dy_InsuranceLiabilityRetainedRiskOfLossEmployeeHealthPlanThreshold
Namespace Prefix: | dy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Retained risk of loss per participant for employee health plan for claim amounts that aggregate across all participants in excess of $250,000 + References No definition available. + Details
Name: | dy_InsuranceLiabilityRetainedRiskOfLossPerParticipantEmployeeHealthPlanClaimAmountsThatAggregateAcrossAllParticipants
Namespace Prefix: | dy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_AccruedInsuranceCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant