XML 19 R1.htm IDEA: XBRL DOCUMENT v3.7.0.1
Document and Entity Information - USD ($)
 12 Months Ended
Mar. 31, 2017
Jun. 05, 2017
Sep. 30, 2016
Document and Entity Information:      
Entity Registrant Name RIVERVIEW BANCORP INC    
Entity Central Index Key 0001041368    
Trading Symbol rvsb    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Current Fiscal Year End Date --03-31    
Entity Filer Category Accelerated Filer    
Entity Well-known Seasoned Issuer No    
Entity Common Stock, Shares Outstanding   22,510,890  
Entity Public Float     $ 121,092,448
Document Type 10-K    
Document Period End Date Mar. 31, 2017    
Amendment Flag false    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY