v2.4.0.8
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2013
Mar. 06, 2014
Jun. 30, 2013
Document and Entity Information      
Entity Registrant Name Hill International, Inc.    
Entity Central Index Key 0001287808    
Document Type 10-K    
Document Period End Date Dec. 31, 2013    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 67,710,000
Entity Common Stock, Shares Outstanding   40,168,591  
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus FY