XML 49 R23.htm IDEA: XBRL DOCUMENT
v3.19.3

Capital Stock | 9 Months Ended
--- | ---
Oct. 26, 2019
Stockholders' Equity Note [Abstract] |
Capital Stock | Capital Stock Repurchases of Common Stock. On August 29, 2018, the Company announced that its Board of Directors had authorized a $150.0 million program to repurchase shares of the Company’s outstanding common stock through February 2020 in open market or private transactions. As of October 26, 2019, $150.0 million of the repurchase authorization remained available. The Company did not repurchase any of its common stock during the nine months ended October 26, 2019 and October 27, 2018.

X
- Definition The entire disclosure of share repurchases under the current and prior share repurchase authorizations. + References No definition available. + Details
Name: | dy_CapitalStockTextBlock
Namespace Prefix: | dy_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StockholdersEquityNoteAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration