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v2.4.1.9

Supplemental Consolidating Financial Statements - Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified | Apr. 25, 2015 | Jul. 26, 2014 | Apr. 26, 2014 | Jul. 27, 2013
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Current assets: |  |  |  |
Cash and equivalents | $ 22,542us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 20,672us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 18,722us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 18,607us-gaap_CashAndCashEquivalentsAtCarryingValue
Accounts receivable, net | 265,772us-gaap_AccountsReceivableNetCurrent | 272,741us-gaap_AccountsReceivableNetCurrent |  |
Costs and estimated earnings in excess of billings | 247,979dy_CostsAndEstimatedEarningsInExcessOfBillings | 230,569dy_CostsAndEstimatedEarningsInExcessOfBillings |  |
Inventories | 45,205us-gaap_InventoryNet | 49,095us-gaap_InventoryNet |  |
Deferred tax assets, net | 19,278us-gaap_DeferredTaxAssetsNetCurrent | 19,932us-gaap_DeferredTaxAssetsNetCurrent |  |
Other current assets | 20,112us-gaap_OtherAssetsCurrent | 12,727us-gaap_OtherAssetsCurrent |  |
Total current assets | 620,888us-gaap_AssetsCurrent | 605,736us-gaap_AssetsCurrent |  |
Property and equipment, net | 226,328us-gaap_PropertyPlantAndEquipmentNet | 205,413us-gaap_PropertyPlantAndEquipmentNet |  |
Goodwill | 269,465us-gaap_Goodwill | 269,088us-gaap_Goodwill |  |
Intangible assets, net | 110,031us-gaap_IntangibleAssetsNetExcludingGoodwill | 116,116us-gaap_IntangibleAssetsNetExcludingGoodwill |  |
Deferred tax assets, net non-current | 0us-gaap_DeferredTaxAssetsNetNoncurrent | 0us-gaap_DeferredTaxAssetsNetNoncurrent |  |
Investment in subsidiaries | 0dy_InvestmentInWhollyOwnedSubsidiaries | 0dy_InvestmentInWhollyOwnedSubsidiaries |  |
Intercompany receivables | 0dy_IntercompanyReceivablesAggregate | 0dy_IntercompanyReceivablesAggregate |  |
Other | 30,404us-gaap_OtherAssetsNoncurrent | 16,001us-gaap_OtherAssetsNoncurrent |  |
Total non-current assets | 636,228us-gaap_AssetsNoncurrent | 606,618us-gaap_AssetsNoncurrent |  |
Total assets | 1,257,116us-gaap_Assets | 1,212,354us-gaap_Assets |  |
Current liabilities: |  |  |  |
Accounts payable | 64,463us-gaap_AccountsPayableCurrent | 63,318us-gaap_AccountsPayableCurrent |  |
Current portion of debt | 0us-gaap_DebtCurrent | 10,938us-gaap_DebtCurrent |  |
Billings in excess of costs and estimated earnings | 14,271dy_BillingsInExcessOfCostsAndEstimatedEarnings | 13,882dy_BillingsInExcessOfCostsAndEstimatedEarnings |  |
Accrued insurance claims | 38,036dy_AccruedInsuranceClaimsCurrent | 32,260dy_AccruedInsuranceClaimsCurrent |  |
Deferred tax liabilities | 0us-gaap_DeferredTaxLiabilitiesCurrent | 0us-gaap_DeferredTaxLiabilitiesCurrent |  |
Other accrued liabilities | 78,224us-gaap_OtherAccruedLiabilitiesCurrent | 76,134us-gaap_OtherAccruedLiabilitiesCurrent |  |
Total current liabilities | 194,994us-gaap_LiabilitiesCurrent | 196,532us-gaap_LiabilitiesCurrent |  |
Long-term debt | 446,692us-gaap_LongTermDebtAndCapitalLeaseObligations | 446,863us-gaap_LongTermDebtAndCapitalLeaseObligations |  |
Accrued insurance claims | 39,487dy_AccruedInsuranceClaimsNoncurrent | 33,782dy_AccruedInsuranceClaimsNoncurrent |  |
Deferred tax liabilities, net non-current | 48,815us-gaap_DeferredTaxLiabilitiesNoncurrent | 45,361us-gaap_DeferredTaxLiabilitiesNoncurrent |  |
Intercompany payables | 0dy_IntercompanyPayablesAggregate | 0dy_IntercompanyPayablesAggregate |  |
Other liabilities | 4,942us-gaap_OtherLiabilitiesNoncurrent | 4,882us-gaap_OtherLiabilitiesNoncurrent |  |
Total liabilities | 734,930us-gaap_Liabilities | 727,420us-gaap_Liabilities |  |
Total stockholders' equity | 522,186us-gaap_StockholdersEquity | 484,934us-gaap_StockholdersEquity |  |
Total liabilities and stockholders' equity | 1,257,116us-gaap_LiabilitiesAndStockholdersEquity | 1,212,354us-gaap_LiabilitiesAndStockholdersEquity |  |
Parent |  |  |  |
Current assets: |  |  |  |
Cash and equivalents | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Accounts receivable, net | 0us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Costs and estimated earnings in excess of billings | 0dy_CostsAndEstimatedEarningsInExcessOfBillings / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0dy_CostsAndEstimatedEarningsInExcessOfBillings / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Inventories | 0us-gaap_InventoryNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0us-gaap_InventoryNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Deferred tax assets, net | 3,191us-gaap_DeferredTaxAssetsNetCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,822us-gaap_DeferredTaxAssetsNetCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Other current assets | 11,673us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 4,956us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total current assets | 14,864us-gaap_AssetsCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 8,778us-gaap_AssetsCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Property and equipment, net | 20,272us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 18,108us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Goodwill | 0us-gaap_Goodwill / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0us-gaap_Goodwill / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Intangible assets, net | 0us-gaap_IntangibleAssetsNetExcludingGoodwill / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0us-gaap_IntangibleAssetsNetExcludingGoodwill / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Deferred tax assets, net non-current | 375us-gaap_DeferredTaxAssetsNetNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 182us-gaap_DeferredTaxAssetsNetNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Investment in subsidiaries | 860,114dy_InvestmentInWhollyOwnedSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 809,617dy_InvestmentInWhollyOwnedSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Intercompany receivables | 0dy_IntercompanyReceivablesAggregate / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0dy_IntercompanyReceivablesAggregate / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Other | 18,229us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 7,748us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total non-current assets | 898,990us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 835,655us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total assets | 913,854us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 844,433us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Current liabilities: |  |  |  |
Accounts payable | 1,494us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,083us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Current portion of debt | 0us-gaap_DebtCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 10,938us-gaap_DebtCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Billings in excess of costs and estimated earnings | 0dy_BillingsInExcessOfCostsAndEstimatedEarnings / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0dy_BillingsInExcessOfCostsAndEstimatedEarnings / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Accrued insurance claims | 166dy_AccruedInsuranceClaimsCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 612dy_AccruedInsuranceClaimsCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Deferred tax liabilities | 0us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Other accrued liabilities | 10,959us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 12,668us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total current liabilities | 12,619us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 27,301us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Long-term debt | 166,250us-gaap_LongTermDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 166,125us-gaap_LongTermDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Accrued insurance claims | 56dy_AccruedInsuranceClaimsNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 778dy_AccruedInsuranceClaimsNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Deferred tax liabilities, net non-current | 0us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Intercompany payables | 209,597dy_IntercompanyPayablesAggregate / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 162,127dy_IntercompanyPayablesAggregate / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Other liabilities | 3,146us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,168us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total liabilities | 391,668us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 359,499us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total stockholders' equity | 522,186us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 484,934us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Total liabilities and stockholders' equity | 913,854us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 844,433us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Issuer |  |  |  |
Current assets: |  |  |  |
Cash and equivalents | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = dy_IssuerMember
Accounts receivable, net | 0us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Costs and estimated earnings in excess of billings | 0dy_CostsAndEstimatedEarningsInExcessOfBillings / dei_LegalEntityAxis = dy_IssuerMember | 0dy_CostsAndEstimatedEarningsInExcessOfBillings / dei_LegalEntityAxis = dy_IssuerMember |  |
Inventories | 0us-gaap_InventoryNet / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_InventoryNet / dei_LegalEntityAxis = dy_IssuerMember |  |
Deferred tax assets, net | 0us-gaap_DeferredTaxAssetsNetCurrent / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_DeferredTaxAssetsNetCurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Other current assets | 36us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = dy_IssuerMember | 16us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Total current assets | 36us-gaap_AssetsCurrent / dei_LegalEntityAxis = dy_IssuerMember | 16us-gaap_AssetsCurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Property and equipment, net | 0us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = dy_IssuerMember |  |
Goodwill | 0us-gaap_Goodwill / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_Goodwill / dei_LegalEntityAxis = dy_IssuerMember |  |
Intangible assets, net | 0us-gaap_IntangibleAssetsNetExcludingGoodwill / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_IntangibleAssetsNetExcludingGoodwill / dei_LegalEntityAxis = dy_IssuerMember |  |
Deferred tax assets, net non-current | 52us-gaap_DeferredTaxAssetsNetNoncurrent / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_DeferredTaxAssetsNetNoncurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Investment in subsidiaries | 2,003,652dy_InvestmentInWhollyOwnedSubsidiaries / dei_LegalEntityAxis = dy_IssuerMember | 1,540,338dy_InvestmentInWhollyOwnedSubsidiaries / dei_LegalEntityAxis = dy_IssuerMember |  |
Intercompany receivables | 0dy_IntercompanyReceivablesAggregate / dei_LegalEntityAxis = dy_IssuerMember | 0dy_IntercompanyReceivablesAggregate / dei_LegalEntityAxis = dy_IssuerMember |  |
Other | 5,118us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = dy_IssuerMember | 5,636us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Total non-current assets | 2,008,822us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = dy_IssuerMember | 1,545,974us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Total assets | 2,008,858us-gaap_Assets / dei_LegalEntityAxis = dy_IssuerMember | 1,545,990us-gaap_Assets / dei_LegalEntityAxis = dy_IssuerMember |  |
Current liabilities: |  |  |  |
Accounts payable | 0us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Current portion of debt | 0us-gaap_DebtCurrent / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_DebtCurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Billings in excess of costs and estimated earnings | 0dy_BillingsInExcessOfCostsAndEstimatedEarnings / dei_LegalEntityAxis = dy_IssuerMember | 0dy_BillingsInExcessOfCostsAndEstimatedEarnings / dei_LegalEntityAxis = dy_IssuerMember |  |
Accrued insurance claims | 0dy_AccruedInsuranceClaimsCurrent / dei_LegalEntityAxis = dy_IssuerMember | 0dy_AccruedInsuranceClaimsCurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Deferred tax liabilities | 80us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = dy_IssuerMember | 80us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Other accrued liabilities | 5,458us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = dy_IssuerMember | 566us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Total current liabilities | 5,538us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = dy_IssuerMember | 646us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Long-term debt | 280,442us-gaap_LongTermDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = dy_IssuerMember | 280,738us-gaap_LongTermDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = dy_IssuerMember |  |
Accrued insurance claims | 0dy_AccruedInsuranceClaimsNoncurrent / dei_LegalEntityAxis = dy_IssuerMember | 0dy_AccruedInsuranceClaimsNoncurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Deferred tax liabilities, net non-current | 485us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = dy_IssuerMember | 432us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Intercompany payables | 862,279dy_IntercompanyPayablesAggregate / dei_LegalEntityAxis = dy_IssuerMember | 454,557dy_IntercompanyPayablesAggregate / dei_LegalEntityAxis = dy_IssuerMember |  |
Other liabilities | 0us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = dy_IssuerMember | 0us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = dy_IssuerMember |  |
Total liabilities | 1,148,744us-gaap_Liabilities / dei_LegalEntityAxis = dy_IssuerMember | 736,373us-gaap_Liabilities / dei_LegalEntityAxis = dy_IssuerMember |  |
Total stockholders' equity | 860,114us-gaap_StockholdersEquity / dei_LegalEntityAxis = dy_IssuerMember | 809,617us-gaap_StockholdersEquity / dei_LegalEntityAxis = dy_IssuerMember |  |
Total liabilities and stockholders' equity | 2,008,858us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = dy_IssuerMember | 1,545,990us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = dy_IssuerMember |  |
Subsidiary Guarantors |  |  |  |
Current assets: |  |  |  |
Cash and equivalents | 21,279us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 19,739us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 18,009us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 18,166us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Accounts receivable, net | 264,290us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 269,760us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Costs and estimated earnings in excess of billings | 246,539dy_CostsAndEstimatedEarningsInExcessOfBillings / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 228,541dy_CostsAndEstimatedEarningsInExcessOfBillings / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Inventories | 45,205us-gaap_InventoryNet / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 49,095us-gaap_InventoryNet / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Deferred tax assets, net | 16,161us-gaap_DeferredTaxAssetsNetCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 16,193us-gaap_DeferredTaxAssetsNetCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Other current assets | 7,716us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 7,237us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Total current assets | 601,190us-gaap_AssetsCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 590,565us-gaap_AssetsCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Property and equipment, net | 186,187us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 171,158us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Goodwill | 269,465us-gaap_Goodwill / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 269,088us-gaap_Goodwill / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Intangible assets, net | 109,492us-gaap_IntangibleAssetsNetExcludingGoodwill / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 115,483us-gaap_IntangibleAssetsNetExcludingGoodwill / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Deferred tax assets, net non-current | 3,556us-gaap_DeferredTaxAssetsNetNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 3,884us-gaap_DeferredTaxAssetsNetNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Investment in subsidiaries | 1,660dy_InvestmentInWhollyOwnedSubsidiaries / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 1,621dy_InvestmentInWhollyOwnedSubsidiaries / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Intercompany receivables | 1,082,143dy_IntercompanyReceivablesAggregate / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 628,443dy_IntercompanyReceivablesAggregate / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Other | 2,960us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 2,466us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Total non-current assets | 1,655,463us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 1,192,143us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Total assets | 2,256,653us-gaap_Assets / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 1,782,708us-gaap_Assets / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Current liabilities: |  |  |  |
Accounts payable | 61,803us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 58,970us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Current portion of debt | 0us-gaap_DebtCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0us-gaap_DebtCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Billings in excess of costs and estimated earnings | 14,271dy_BillingsInExcessOfCostsAndEstimatedEarnings / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 13,882dy_BillingsInExcessOfCostsAndEstimatedEarnings / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Accrued insurance claims | 37,827dy_AccruedInsuranceClaimsCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 31,599dy_AccruedInsuranceClaimsCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Deferred tax liabilities | 14us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 66us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Other accrued liabilities | 60,911us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 61,284us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Total current liabilities | 174,826us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 165,801us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Long-term debt | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Accrued insurance claims | 39,402dy_AccruedInsuranceClaimsNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 32,959dy_AccruedInsuranceClaimsNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Deferred tax liabilities, net non-current | 51,128us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 48,593us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Intercompany payables | 0dy_IntercompanyPayablesAggregate / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0dy_IntercompanyPayablesAggregate / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Other liabilities | 1,792us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 1,711us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Total liabilities | 267,148us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 249,064us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Total stockholders' equity | 1,989,505us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 1,533,644us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Total liabilities and stockholders' equity | 2,256,653us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 1,782,708us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |
Non- Guarantor Subsidiaries |  |  |  |
Current assets: |  |  |  |
Cash and equivalents | 1,263us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 933us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 713us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 441us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Accounts receivable, net | 1,482us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 2,981us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Costs and estimated earnings in excess of billings | 1,440dy_CostsAndEstimatedEarningsInExcessOfBillings / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 2,028dy_CostsAndEstimatedEarningsInExcessOfBillings / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Inventories | 0us-gaap_InventoryNet / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0us-gaap_InventoryNet / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Deferred tax assets, net | 76us-gaap_DeferredTaxAssetsNetCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 87us-gaap_DeferredTaxAssetsNetCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Other current assets | 687us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 518us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Total current assets | 4,948us-gaap_AssetsCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 6,547us-gaap_AssetsCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Property and equipment, net | 19,869us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 16,147us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Goodwill | 0us-gaap_Goodwill / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0us-gaap_Goodwill / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Intangible assets, net | 539us-gaap_IntangibleAssetsNetExcludingGoodwill / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 633us-gaap_IntangibleAssetsNetExcludingGoodwill / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Deferred tax assets, net non-current | 333us-gaap_DeferredTaxAssetsNetNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 15us-gaap_DeferredTaxAssetsNetNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Investment in subsidiaries | 0dy_InvestmentInWhollyOwnedSubsidiaries / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0dy_InvestmentInWhollyOwnedSubsidiaries / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Intercompany receivables | 0dy_IntercompanyReceivablesAggregate / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0dy_IntercompanyReceivablesAggregate / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Other | 4,097us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 151us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Total non-current assets | 24,838us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 16,946us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Total assets | 29,786us-gaap_Assets / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 23,493us-gaap_Assets / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Current liabilities: |  |  |  |
Accounts payable | 1,166us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 1,265us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Current portion of debt | 0us-gaap_DebtCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0us-gaap_DebtCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Billings in excess of costs and estimated earnings | 0dy_BillingsInExcessOfCostsAndEstimatedEarnings / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0dy_BillingsInExcessOfCostsAndEstimatedEarnings / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Accrued insurance claims | 43dy_AccruedInsuranceClaimsCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 49dy_AccruedInsuranceClaimsCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Deferred tax liabilities | 56us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 24us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Other accrued liabilities | 896us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 1,616us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Total current liabilities | 2,161us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 2,954us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Long-term debt | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Accrued insurance claims | 29dy_AccruedInsuranceClaimsNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 45dy_AccruedInsuranceClaimsNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Deferred tax liabilities, net non-current | 1,518us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 417us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Intercompany payables | 10,267dy_IntercompanyPayablesAggregate / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 11,759dy_IntercompanyPayablesAggregate / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Other liabilities | 4us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 3us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Total liabilities | 13,979us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 15,178us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Total stockholders' equity | 15,807us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 8,315us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Total liabilities and stockholders' equity | 29,786us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 23,493us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Eliminations and Reclassifications |  |  |  |
Current assets: |  |  |  |
Cash and equivalents | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Accounts receivable, net | 0us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_AccountsReceivableNetCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Costs and estimated earnings in excess of billings | 0dy_CostsAndEstimatedEarningsInExcessOfBillings / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0dy_CostsAndEstimatedEarningsInExcessOfBillings / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Inventories | 0us-gaap_InventoryNet / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_InventoryNet / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Deferred tax assets, net | (150)us-gaap_DeferredTaxAssetsNetCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (170)us-gaap_DeferredTaxAssetsNetCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Other current assets | 0us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Total current assets | (150)us-gaap_AssetsCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (170)us-gaap_AssetsCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Property and equipment, net | 0us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Goodwill | 0us-gaap_Goodwill / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_Goodwill / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Intangible assets, net | 0us-gaap_IntangibleAssetsNetExcludingGoodwill / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_IntangibleAssetsNetExcludingGoodwill / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Deferred tax assets, net non-current | (4,316)us-gaap_DeferredTaxAssetsNetNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (4,081)us-gaap_DeferredTaxAssetsNetNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Investment in subsidiaries | (2,865,426)dy_InvestmentInWhollyOwnedSubsidiaries / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (2,351,576)dy_InvestmentInWhollyOwnedSubsidiaries / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Intercompany receivables | (1,082,143)dy_IntercompanyReceivablesAggregate / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (628,443)dy_IntercompanyReceivablesAggregate / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Other | 0us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Total non-current assets | (3,951,885)us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (2,984,100)us-gaap_AssetsNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Total assets | (3,952,035)us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (2,984,270)us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Current liabilities: |  |  |  |
Accounts payable | 0us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_AccountsPayableCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Current portion of debt | 0us-gaap_DebtCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_DebtCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Billings in excess of costs and estimated earnings | 0dy_BillingsInExcessOfCostsAndEstimatedEarnings / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0dy_BillingsInExcessOfCostsAndEstimatedEarnings / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Accrued insurance claims | 0dy_AccruedInsuranceClaimsCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0dy_AccruedInsuranceClaimsCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Deferred tax liabilities | (150)us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (170)us-gaap_DeferredTaxLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Other accrued liabilities | 0us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Total current liabilities | (150)us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (170)us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Long-term debt | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Accrued insurance claims | 0dy_AccruedInsuranceClaimsNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0dy_AccruedInsuranceClaimsNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Deferred tax liabilities, net non-current | (4,316)us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (4,081)us-gaap_DeferredTaxLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Intercompany payables | (1,082,143)dy_IntercompanyPayablesAggregate / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (628,443)dy_IntercompanyPayablesAggregate / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Other liabilities | 0us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 0us-gaap_OtherLiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Total liabilities | (1,086,609)us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (632,694)us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Total stockholders' equity | (2,865,426)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (2,351,576)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |
Total liabilities and stockholders' equity | $ (3,952,035)us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | $ (2,984,270)us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |

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- 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 current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References No definition available. + Details
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