Earnings Per Share - Additional Information (Detail)	Jun. 03, 2022 USD ($) Director shares	Jun. 04, 2021 USD ($) Director shares	Oct. 01, 2021 USD ($) shares	Nov. 20, 2020 shares	Jun. 05, 2020 USD ($) shares
Earnings Per Share Basic [Line Items]
Compensation annual basis committee award | $	$ 10,013	$ 6,000			$ 4,000
Number of directors received shares | shares	240	272		20	176
Number of directors received shares | Director	12	10
Number of directors received prorated dollar value of shares | Director		4
Perpetual Federal Savings Bank {Member]
Earnings Per Share Basic [Line Items]
Compensation annual basis committee award | $			$ 1,523
Number of directors received shares | shares			68