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Loans and Allowance for Credit Losses - Classes of loans information (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2021
USD ($)
item
Mar. 31, 2020
USD ($)
Jun. 30, 2020
USD ($)
Provision for credit losses | $ $ (409) $ 2,850 $ 1,591 $ 4,134  
ACL | $ $ 35,227   $ 35,227   $ 25,139
Management Trailing Measures, Period Of National And State Unemployment     12 months    
Management Trailing Measures, Period Of G D P Growth     2 years    
Consumer Loan          
Amortization period of loans     5 years    
Consumer Loans, Home Equity Lines Of Credit          
Maximum percentage of appraised value or purchase price that loans cannot exceed     100.00%    
Amortization period of loans     10 years    
Consumer Loans, Other Than Home Equity Lines Of Credit          
Maximum percentage of appraised value or purchase price that loans cannot exceed     100.00%    
Amortization period of loans     60 months    
Commercial Loan          
Amortization period of loans     5 years    
Amortization period for commercial operating lines of credit or agricultural production lines     1 year    
Construction Real Estate | Minimum          
Maturities of single-family residential construction loans     6 months    
Maturities of multifamily or commercial construction loans     12 months    
Construction Real Estate | Maximum          
Maturities of single-family residential construction loans     12 months    
Maturities of multifamily or commercial construction loans     24 months    
Residential real estate loans          
Fixed-rate and adjustable-rate mortgage (ARM) loans amortization period (in years)     30 years    
Amortization period of multi-family residential loans if balloon maturities     10 years    
Residential real estate loans | Minimum          
Number of family residences | item     1    
Residential real estate loans | Maximum          
Number of family residences | item     4    
Residential real estate loans | Construction Real Estate          
Amortization period of loans     30 years    
Residential real estate loans | Single Family [Member]          
Maximum percentage of appraised value or purchase price that loans cannot exceed     90.00%    
Residential real estate loans | Multifamily [Member]          
Maximum percentage of appraised value or purchase price that loans cannot exceed     85.00%    
Amortization period of loans     25 years    
Commercial Real Estate          
Maximum percentage of appraised value or purchase price that loans cannot exceed     80.00%    
Amortization period of loans     25 years    
Term of fixed interest applicability on loans     10 years    
Term of variable interest applicability on loans     7 years    
Agricultural real estate terms if 80% loan-to-value ratio     25 years    
Agricultural real estate terms if 75% loan-to-value ratio     30 years    
Commercial Real Estate | Construction Real Estate          
Amortization period of loans     25 years