Fair Value Measurements and Fair Value of Financial Instruments, Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Jun. 30, 2021
Assets [Abstract]
Securities available-for-sale	$ 411,442	$ 390,890
Equity securities	296	307
Recurring [Member]
Assets [Abstract]
Securities available-for-sale	411,442	390,890
Equity securities	296	307
Total securities measured at fair value	411,738	391,197
Recurring [Member] | U.S. Government Sponsored Enterprises [Member]
Assets [Abstract]
Securities available-for-sale	11,937	12,903
Recurring [Member] | U.S. Treasury Securities [Member]
Assets [Abstract]
Securities available-for-sale	18,981	19,836
Recurring [Member] | State and Political Subdivisions [Member]
Assets [Abstract]
Securities available-for-sale	232,017	200,656
Recurring [Member] | Mortgage-backed Securities-Residential [Member]
Assets [Abstract]
Securities available-for-sale	32,484	34,981
Recurring [Member] | Mortgage-backed Securities-Multi-family [Member]
Assets [Abstract]
Securities available-for-sale	98,589	119,407
Recurring [Member] | Corporate Debt Securities [Member]
Assets [Abstract]
Securities available-for-sale	17,434	3,107
Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Equity securities	296	307
Total securities measured at fair value	296	307
Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Government Sponsored Enterprises [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Treasury Securities [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | State and Political Subdivisions [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Mortgage-backed Securities-Residential [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Mortgage-backed Securities-Multi-family [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Corporate Debt Securities [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets [Abstract]
Securities available-for-sale	411,442	390,890
Equity securities	0	0
Total securities measured at fair value	411,442	390,890
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Sponsored Enterprises [Member]
Assets [Abstract]
Securities available-for-sale	11,937	12,903
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury Securities [Member]
Assets [Abstract]
Securities available-for-sale	18,981	19,836
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | State and Political Subdivisions [Member]
Assets [Abstract]
Securities available-for-sale	232,017	200,656
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed Securities-Residential [Member]
Assets [Abstract]
Securities available-for-sale	32,484	34,981
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed Securities-Multi-family [Member]
Assets [Abstract]
Securities available-for-sale	98,589	119,407
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member]
Assets [Abstract]
Securities available-for-sale	17,434	3,107
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Equity securities	0	0
Total securities measured at fair value	0	0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Government Sponsored Enterprises [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Treasury Securities [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | State and Political Subdivisions [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage-backed Securities-Residential [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage-backed Securities-Multi-family [Member]
Assets [Abstract]
Securities available-for-sale	0	0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Corporate Debt Securities [Member]
Assets [Abstract]
Securities available-for-sale	$ 0	$ 0