Organization and Summary of Significant Accounting Policies - Intangible Assets, Finite-Lived (Details) - USD ($)	6 Months Ended	12 Months Ended
	Dec. 31, 2020	Jun. 30, 2020
Organization and Summary of Significant Accounting Policies
Finite-Lived Core Deposits, Gross	$ 15,300,000	$ 15,300,000
Finite-Lived Intangible Assets, Accumulated Amortization	9,400,000	8,700,000
Other Finite-Lived Intangible Assets, Gross	3,800,000	3,800,000
Other Finite Lived Intangible Assets Gross Accumulated Amortization	3,800,000	3,800,000
Amortization of Mortgage Servicing Rights (MSRs)	$ 1,500,000	1,100,000
Core Deposits and Intangible Assets, Remaining Amortization Period	five to seven years
Remainder of fiscal 2021	$ 677,000
2022	1,400,000
2023	1,400,000
2024	1,400,000
2025	807,000
Thereafter	328,000
Impairment of Intangible Assets, Finite-lived	$ 0	$ 0