Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v2.3.0.15
Document and Entity Information (USD $)
6 Months Ended
Sep. 30, 2011
Oct. 31, 2011
Sep. 30, 2010
Document and Entity Information [Abstract]      
Entity Registrant Name GRAHAM CORP    
Entity Central Index Key 0000716314    
Document Type 10-Q    
Document Period End Date Sep. 30, 2011
Amendment Flag false    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus Q2    
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     $ 143,349,083
Entity Common Stock, Shares Outstanding   9,913,634