v3.19.2
Document and Entity Information
Sep. 23, 2019
Document And Entity Information [Line Items]  
Entity Registrant Name TIDEWATER INC
Amendment Flag false
Entity Central Index Key 0000098222
Document Type 8-K
Document Period End Date Sep. 23, 2019
Entity Incorporation State Country Code DE
Entity File Number 1-6311
Entity Tax Identification Number 72-0487776
Entity Address, Address Line One 6002 Rogerdale Road
Entity Address, Address Line Two Suite 600
Entity Address, City or Town Houston
Entity Address, State or Province TX
Entity Address, Postal Zip Code 77072
City Area Code (713)
Local Phone Number 470-5300
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Common stock, $0.001 par value per share
Trading Symbol TDW
Security Exchange Name NYSE
Series A Warrants To Purchase Shares Of Common Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Series A Warrants to purchase shares of common stock
Trading Symbol TDW.WS.A
Security Exchange Name NYSE
Series B Warrants To Purchase Shares Of Common Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Series B Warrants to purchase shares of common stock
Trading Symbol TDW.WS.B
Security Exchange Name NYSE
Warrant [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Warrants to purchase shares of common stock
Trading Symbol TDW.WS
Security Exchange Name NYSEAMER