XML 18 R1.htm IDEA: XBRL DOCUMENT v3.19.3
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2019
Nov. 04, 2019
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Registrant Name Tidewater Inc.  
Entity Central Index Key 0000098222  
Entity Interactive Data Current Yes  
Entity Current Reporting Status Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   39,231,039
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  
Entity Incorporation, State or Country Code DE  
Document Quarterly Report true  
Document Transition Report false  
Common Stock    
Document Information [Line Items]    
Trading Symbol TDW  
Security Exchange Name NYSE  
Title of 12(b) Security Common stock, $0.001 par value per share  
Series A Warrants    
Document Information [Line Items]    
Trading Symbol TDW.WS.A  
Security Exchange Name NYSE  
Title of 12(b) Security Series A Warrants to purchase shares of common stock  
Series B Warrants    
Document Information [Line Items]    
Trading Symbol TDW.WS.B  
Security Exchange Name NYSE  
Title of 12(b) Security Series B Warrants to purchase shares of common stock  
Warrants to Purchase common stock    
Document Information [Line Items]    
Trading Symbol TDW.WS  
Security Exchange Name NYSEAMER  
Title of 12(b) Security Warrants to purchase shares of common stock