FAIR VALUE - ASSETS MEASURED NONRECURRING BASIS (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity - Fair Value	$ 0	$ 202,677
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity - Fair Value		0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity - Fair Value		77,415
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity - Fair Value		125,262
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	34,769	32,069
Other real estate owned and foreclosed assets, fair value	961	252
Nonrecurring | 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	908
Nonrecurring | Multifamily real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and foreclosed assets, fair value		207
Nonrecurring | 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	53	45
Nonrecurring | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity - Fair Value		79,164
Nonrecurring | Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	28,351	28,610
Nonrecurring | Home equity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	47	33
Nonrecurring | Multi-family real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	5,478	2,218
Nonrecurring | Commercial real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	232	254
Nonrecurring | Auto and RV secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	216	278
Nonrecurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	445	676
Nonrecurring | 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, fair value	0	0
Other real estate owned and foreclosed assets, fair value	0	0
Nonrecurring | 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
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Multifamily 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
Nonrecurring | 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
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity - Fair Value		0
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	0	0
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Home equity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	0	0
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Multi-family real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	0	0
Nonrecurring | 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, fair value	0	0
Nonrecurring | 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, fair value	0	0
Nonrecurring | 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, fair value	0	0
Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	0	0
Other real estate owned and foreclosed assets, fair value	0	0
Nonrecurring | 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
Nonrecurring | Significant Other Observable Inputs (Level 2) | Multifamily 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
Nonrecurring | 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
Nonrecurring | Significant Other Observable Inputs (Level 2) | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity - Fair Value		0
Nonrecurring | Significant Other Observable Inputs (Level 2) | Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	0	0
Nonrecurring | Significant Other Observable Inputs (Level 2) | Home equity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	0	0
Nonrecurring | Significant Other Observable Inputs (Level 2) | Multi-family real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	0	0
Nonrecurring | 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, fair value	0	0
Nonrecurring | 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, fair value	0	0
Nonrecurring | Significant Other Observable Inputs (Level 2) | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	0	0
Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	34,769	32,069
Other real estate owned and foreclosed assets, fair value	961	252
Nonrecurring | 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	908
Nonrecurring | Significant Unobservable Inputs (Level 3) | Multifamily real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and foreclosed assets, fair value		207
Nonrecurring | 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	53	45
Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity - Fair Value	0	79,164
Nonrecurring | Significant Unobservable Inputs (Level 3) | Mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	28,351	28,610
Nonrecurring | Significant Unobservable Inputs (Level 3) | Home equity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	47	33
Nonrecurring | Significant Unobservable Inputs (Level 3) | Multi-family real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	5,478	2,218
Nonrecurring | Significant Unobservable Inputs (Level 3) | Commercial real estate secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	232	254
Nonrecurring | Significant Unobservable Inputs (Level 3) | Auto and RV secured
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	216	278
Nonrecurring | Significant Unobservable Inputs (Level 3) | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, fair value	$ 445	$ 676