v3.10.0.1
Document and Entity Information - shares
9 Months Ended
Jun. 30, 2018
Aug. 07, 2018
Document Information [Line Items]    
Entity Registrant Name META FINANCIAL GROUP INC  
Entity Central Index Key 0000907471  
Current Fiscal Year End Date --09-30  
Entity Filer Category Large Accelerated Filer  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2018  
Common Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   13,059,722
Common Stock, Nonvoting [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   0