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v2.4.1.9

Accounts Receivable (Details) (USD $) | Apr. 25, 2015 | Jul. 26, 2014 | May 21, 2015
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Contract billings | $ 246,876,000us-gaap_BilledContractReceivables | $ 258,254,000us-gaap_BilledContractReceivables |
Retainage and other receivables | 19,894,000dy_ContractReceivableRetainageAndOtherReceivables | 15,323,000dy_ContractReceivableRetainageAndOtherReceivables |
Total | 266,770,000us-gaap_AccountsReceivableGross | 273,577,000us-gaap_AccountsReceivableGross |
Less: allowance for doubtful accounts | (998,000)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | (836,000)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent |
Accounts receivable, net | 265,772,000us-gaap_AccountsReceivableNet | 272,741,000us-gaap_AccountsReceivableNet |
Investments and Other Noncurrent Assets | 4,000,000us-gaap_InvestmentsAndOtherNoncurrentAssets |  |
Corporation |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 17,700,000us-gaap_AccountsReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember |  |
Accounts receivable, net | 13,100,000us-gaap_AccountsReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember |  |
Collection of Past Due Receivable Balance | 7,100,000dy_CollectionofPastDueReceivableBalance / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember |  |
Corporation | Subsequent Event |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Collection of Past Due Receivable Balance |  |  | $ 5,800,000dy_CollectionofPastDueReceivableBalance / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

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- Definition Contract Receivable Retainage and Other Receivables + References No definition available. + Details
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- Definition For unclassified balance sheet, amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 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 210.9-03.9) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 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 210.9-03.9) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.5) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524 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 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -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 210.5-02.3(c)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Aggregate carrying amount, as of the balance sheet date, of investments and other noncurrent assets not separately disclosed in the balance sheet due to materiality considerations. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer). + References No definition available. + Details
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