v2.4.0.6
Document And Entity Information (USD $)
12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Aug. 10, 2011
Document and Entity Information [Abstract]      
Entity Registrant Name CELADON GROUP INC    
Document Type 10-K    
Current Fiscal Year End Date --06-30    
Entity Common Stock, Shares Outstanding     22,829,310
Entity Public Float   $ 233,000,000  
Amendment Flag false    
Entity Central Index Key 0000865941    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Jun. 30, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY