v3.25.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2025
Aug. 01, 2025
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Securities Act File Number 001-41090  
Entity Registrant Name Southland Holdings, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 87-1783910  
Entity Address, Address Line One 1100 Kubota Dr.  
Entity Address, City or Town Grapevine  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 76051  
City Area Code 817  
Local Phone Number 293-4263  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   54,113,036
Entity Central Index Key 0001883814  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Common stock    
Document and Entity Information    
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Trading Symbol SLND  
Security Exchange Name NYSEAMER  
Redeemable warrants    
Document and Entity Information    
Title of 12(b) Security Redeemable warrants, exercisable for shares of common stock at an exercise price of $11.50 per share  
Trading Symbol SLND WS  
Security Exchange Name NYSEAMER