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Available for Sale Securities - Other Securities Policy: Pooled Trust Preferred Securities (Details) | 12 Months Ended
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Jun. 30, 2021 USD ($) security | Jun. 30, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Number of Pooled Trust Preferred Securities | 2 |
Fair Value of Pooled Trust Preferred Securities Held | $ 720,000 |
Unrealized Losses on Pooled Trust Preferred Securities in a Continuous Unrealized Loss Position for 12 Months or More | $ 257,000 |
Securities that continue to receive cash interest payments | security | 1 |
Credit losses recognized on investments | $ 0 | $ 0
Prepayments |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Debt Securities, Available-for-sale, Measurement Input | 1.8 |
Annual defaults |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Debt Securities, Available-for-sale, Measurement Input | 220 |
Debt Securities Basis Points Thereafter | 0.80 |
Recovery rate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Debt Securities, Available-for-sale, Measurement Input | 10 |
Lagged years |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Debt Securities, Available-for-sale, Term | 2 years |

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