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Securities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities with a book value	$ 233,947		$ 233,947		$ 245,052
Fair Value	$ 207,693		$ 207,693		220,906
Percentage of equity securities	10.00%		10.00%
Repurchase agreements	$ 10,764		$ 10,764		9,244
Gross gains from sales of available for sale securities	12,000	$ 0	12,000	$ 0
Gross losses from sales of available for sale securities	0	0	183,000	0
Tax benefit to net realized gains (losses)	4	0	(48)	0
Investments in debt and marketable equity securities	$ 193,637		$ 193,637		$ 209,133
Temporarily impaired debt securities percentage of investment securities portfolio	93.00%		93.00%		95.00%
Asset Pledged as Collateral with Right [Member]
Debt Securities, Available-for-sale [Line Items]
Carrying value of securities pledged as collateral	$ 100,681		$ 100,681		$ 125,209
Tax benefit to net realized gains (losses)	4,000	$ 0	48,000	$ 0
Maturity Overnight [Member]
Debt Securities, Available-for-sale [Line Items]
Repurchase agreements	10,800		10,800
Mortgage-backed securities – GSE residential [Member]
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities with a book value	204,128		204,128		210,367
Fair Value	180,219		180,219		188,185
Investments in debt and marketable equity securities	169,911		169,911		181,629
Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Investments in debt and marketable equity securities	193,637		193,637		209,133
Small Business Administration [Member]
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities with a book value	17,910		17,910		17,960
Fair Value	16,062		16,062		16,442
Investments in debt and marketable equity securities	$ 14,675		$ 14,675		$ 14,983

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Debt securities greater than stated percentage of equity securities.

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