Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)	Jun. 30, 2022	Jun. 30, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets, Fair Value	$ 1,385,316,000	$ 1,678,696,000
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets, Fair Value	178,000	178,000
Other Real Estate Owned | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets, Fair Value	178,000	178,000
Significant Unobservable Inputs (Level 3) [Member] | Impaired Loans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets, Fair Value	21,000,000.0	18,700,000
Financing receivable, allowance for credit losses, individually evaluated for impairment	3,600,000	6,500,000
Loans and Leases Receivable, Gross	24,600,000	25,200,000
Significant Unobservable Inputs (Level 3) [Member] | Other Real Estate Owned | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets, Fair Value	$ 178,000	$ 178,000