Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v2.4.0.6
Document and Entity Information (USD $)
12 Months Ended
Mar. 31, 2012
Jun. 01, 2012
Sep. 30, 2011
Document and Entity Information [Abstract]      
Entity Registrant Name GRAHAM CORP    
Entity Central Index Key 0000716314    
Document Type 10-K    
Document Period End Date Mar. 31, 2012    
Amendment Flag false    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY    
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 Accelerated Filer    
Entity Public Float     $ 154,745,644
Entity Common Stock, Shares Outstanding   9,951,466