v3.10.0.1
Document and Entity Information - shares
3 Months Ended
Dec. 31, 2018
Feb. 01, 2019
Document Information [Line Items]    
Entity Registrant Name META FINANCIAL GROUP INC  
Entity Central Index Key 0000907471  
Current Fiscal Year End Date --09-30  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Filer Category Large Accelerated Filer  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Dec. 31, 2018  
Common Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   39,419,991
Common Stock, Nonvoting [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   0