Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information (USD $)
12 Months Ended
Mar. 31, 2012
Jun. 04, 2012
Sep. 30, 2011
Document and Entity Information      
Entity Registrant Name Thermon Group Holdings, Inc.    
Entity Central Index Key 0001489096    
Document Type 10-K    
Document Period End Date Mar. 31, 2012    
Amendment Flag false    
Current Fiscal Year End Date --03-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Non-accelerated Filer    
Entity Public Float     $ 217,357,325
Entity Common Stock, Shares Outstanding   30,351,412  
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY