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Loan Quality and Allowance for Loan Losses - Additional Information (Detail) | Mar. 31, 2019 USD ($) Property Loan | Jun. 30, 2018 USD ($) Property Loan
--- | --- | ---
Financing Receivable Recorded Investment [Line Items] |  |
Other real estate owned | $ 209,000 | $ 725,000
Residential Mortgage [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Number of loans in process of foreclosure | Loan | 17 | 14
Mortgage loans in process of foreclosure, carrying value | $ 3,200,000 | $ 2,300,000
Residential Mortgage [Member] | Single-family Property [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Other real estate owned | $ 209,000 | $ 725,000
Residential Mortgage [Member] | Real Estate Acquired in Satisfaction of Debt [Member] | Single-family Property [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Number of properties held | Property | 1 | 4

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- Definition Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL49126937-111524 + Details
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