v3.23.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2022
Mar. 21, 2023
Jun. 30, 2022
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2022    
Entity File Number 001-41090    
Entity Registrant Name Southland Holdings, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 85-1783910    
Entity Address, Address Line One 1100 Kubota Drive    
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 Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
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    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   44,407,831  
Entity Public Float     $ 293,413,760
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001883814    
Amendment Flag false    
Auditor Name WithumSmith+Brown, PC    
Auditor Firm ID 100    
Auditor Location New York, New York    
ICFR Auditor Attestation Flag false    
Common Stock [Member]      
Document Information [Line Items]      
Title of 12(b) Security Common stock, par value $0.0001 per share    
Trading Symbol SLND    
Security Exchange Name NYSEAMER    
Redeemable Warrants [Member]      
Document Information [Line Items]      
Title of 12(b) Security Redeemable warrants, exercisable for shares of common stock at an exercise price of $11.50 per share    
Trading Symbol SLNDW    
Security Exchange Name NYSEAMER