XML 68 R64.htm IDEA: XBRL DOCUMENT v3.3.0.814

Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 24, 2015	Oct. 25, 2014
Real property and equipment leases
Related Party Transaction [Line Items]
Total expense under lease agreements	$ 750	$ 429
Subcontractors and materials expense
Related Party Transaction [Line Items]
Total expense under lease agreements	$ 1,092	$ 502

X

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 850



-SubTopic 10



-Section 50



-Paragraph 1



-Subparagraph (c)



-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=dy_RealpropertyandequipmentleasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=dy_SubcontractorsandmaterialsexpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: