FAIR VALUE - ASSETS MEASURED NONRECURRING BASIS (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	$ 87,941	$ 48,444
Other real estate owned and foreclosed assets, fair value	6,408	7,485
Single family real estate secured: Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	84,030	46,005
Multifamily real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	530	2,108
Auto and RV secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	202	115
Commercial & Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	213
Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	71	216
Single family real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and foreclosed assets, fair value	6,114	7,449
Autos and RVs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and foreclosed assets, fair value	294	36
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0	0
Other real estate owned and foreclosed assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Single family real estate secured: Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Multifamily real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Auto and RV secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial & Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Single family real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and foreclosed assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Autos and RVs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and foreclosed assets, fair value	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0	0
Other real estate owned and foreclosed assets, fair value	0	0
Significant Other Observable Inputs (Level 2) | Single family real estate secured: Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0	0
Significant Other Observable Inputs (Level 2) | Multifamily real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0	0
Significant Other Observable Inputs (Level 2) | Auto and RV secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0	0
Significant Other Observable Inputs (Level 2) | Commercial & Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0
Significant Other Observable Inputs (Level 2) | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0	0
Significant Other Observable Inputs (Level 2) | Single family real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and foreclosed assets, fair value	0	0
Significant Other Observable Inputs (Level 2) | Autos and RVs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and foreclosed assets, fair value	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	87,941	48,444
Other real estate owned and foreclosed assets, fair value	6,408	7,485
Significant Unobservable Inputs (Level 3) | Single family real estate secured: Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	84,030	46,005
Significant Unobservable Inputs (Level 3) | Multifamily real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	530	2,108
Significant Unobservable Inputs (Level 3) | Commercial real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	2,895
Significant Unobservable Inputs (Level 3) | Auto and RV secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	202	115
Significant Unobservable Inputs (Level 3) | Commercial & Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	213
Significant Unobservable Inputs (Level 3) | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	71	216
Significant Unobservable Inputs (Level 3) | Single family real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and foreclosed assets, fair value	6,114	7,449
Significant Unobservable Inputs (Level 3) | Autos and RVs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and foreclosed assets, fair value	294	$ 36
Commercial real estate secured - mortgage | Commercial real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	2,895
Commercial real estate secured - mortgage | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0
Commercial real estate secured - mortgage | Significant Other Observable Inputs (Level 2) | Commercial real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	0
Commercial real estate secured - mortgage | Significant Unobservable Inputs (Level 3) | Commercial real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases, fair value	$ 2,895