XML 37 R30.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Costs and Estimated Earnings in Excess of Billings (Tables) | 9 Months Ended
--- | ---
Apr. 27, 2013
Contractors [Abstract] |
Costs and Estimated Earnings in Excess of Billings, Net | Costs and estimated earnings in excess of billings, net, consists of the following:
| April 27, 2013 |  | July 28, 2012
| (Dollars in thousands)
Costs incurred on contracts in progress | $ | 174,089 |  |  | $ | 100,766 |
Estimated to date earnings | 40,644 |  |  | 26,555 |
Total costs and estimated earnings | 214,733 |  |  | 127,321 |
Less: billings to date | (43,183 | ) |  | (1,522 | )
| $ | 171,550 |  |  | $ | 125,799 |
Included in the accompanying condensed consolidated balance sheets under the captions: |  |  |  |  |
Costs and estimated earnings in excess of billings | $ | 183,920 |  |  | $ | 127,321 |
Billings in excess of costs and estimated earnings | (12,370 | ) |  | (1,522 | )
| $ | 171,550 |  |  | $ | 125,799 |

X
- Definition Tabular disclosure of costs and estimated earnings in excess of billings, net. + References No definition available. + Details
Name: | dy_CostsAndEstimatedEarningsInExcessOfBillingsNetTableTextBlock
Namespace Prefix: | dy_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ContractorsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration