XML 35 R23.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Capital Stock | 6 Months Ended
--- | ---
Jul. 28, 2018
Stockholders' Equity Note [Abstract] |
Capital Stock | Capital Stock Repurchases of Common Stock. During the six months ended July 29, 2017, the Company repurchased and canceled 400,000 shares of its common stock, at an average price of $94.77 per share, for $37.9 million. The Company did not repurchase any of its common stock during the six months ended July 28, 2018. As of July 28, 2018, $95.2 million remained available for repurchases through August 2018 under the Company’s share repurchase program. See Note 20, Subsequent Events, for information regarding a new authorization by the Company’s Board of Directors in August 2018 which replaced the previous authorization following its expiration.

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