Investment Securities (Narrative) (Details)	3 Months Ended		6 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($) security item	Jun. 30, 2019 security	Dec. 31, 2019 USD ($) item
Investment Securities [Line Items]
Number of holdings greater than 10 percent of stockholders equity | item			0		0
Held-to-maturity securities, Number of sales | security			0	0
Available-for-Sale Securities, Number of sales | security			0	0
Restricted investment securities			$ 443,445,000		$ 382,963,000
Allowance for credit losses			0
Fair Value			127,654,000		167,833,000
Unrealized Loss			12,793,000		3,707,000
Corporate Bonds [Member]
Investment Securities [Line Items]
Fair Value			106,215,000		115,830,000
Unrealized Loss			$ 12,785,000		3,170,000
Number of institutions | item			6
Maturity period			10 years
Debt securities, Weighted average fixed rate			5.14%
Corporate Bonds [Member] | Forecast [Member]
Investment Securities [Line Items]
Securities repriced	$ 28,600,000	$ 77,600,000
State And Municipals [Member]
Investment Securities [Line Items]
Fair Value			$ 968,000		11,746,000
Unrealized Loss			1,000		239,000
Pass-Through Mortgage Securities [Member]
Investment Securities [Line Items]
Fair Value			10,269,000		9,371,000
Unrealized Loss			2,000		39,000
Collateralized Mortgage Obligations [Member]
Investment Securities [Line Items]
Fair Value			10,202,000		30,886,000
Unrealized Loss			$ 5,000		$ 259,000
Minimum [Member] | Corporate Bonds [Member]
Investment Securities [Line Items]
Fixed interest rate period			2 years
Maximum [Member] | Corporate Bonds [Member]
Investment Securities [Line Items]
Fixed interest rate period			3 years