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Loan Quality and Allowance for Loan Losses - Troubled Debt Restructurings of Loans Receivable (Detail) $ in Thousands	9 Months Ended
	Mar. 31, 2019 USD ($) Loan	Mar. 31, 2018 USD ($) Loan
Financing Receivable Modifications [Line Items]
Number of loans | Loan	12	8
Pre-modification outstanding recorded investment	$ 5,692	$ 1,908
Post-modification outstanding recorded investment	5,752	2,214
Reserves included in and charge offs against the allowance for loan loss recognized at modification	$ 4	$ 153
Residential Mortgage [Member]
Financing Receivable Modifications [Line Items]
Number of loans | Loan	5	5
Pre-modification outstanding recorded investment	$ 1,267	$ 1,521
Post-modification outstanding recorded investment	1,309	1,813
Reserves included in and charge offs against the allowance for loan loss recognized at modification	$ 2	$ 145
Non-Residential Mortgage [Member]
Financing Receivable Modifications [Line Items]
Number of loans | Loan	1	2
Pre-modification outstanding recorded investment	$ 2,957	$ 315
Post-modification outstanding recorded investment	2,955	330
Reserves included in and charge offs against the allowance for loan loss recognized at modification	$ 2	$ 7
Commercial Business [Member]
Financing Receivable Modifications [Line Items]
Number of loans | Loan	6
Pre-modification outstanding recorded investment	$ 1,468
Post-modification outstanding recorded investment	$ 1,488
Home Equity Loans [Member]
Financing Receivable Modifications [Line Items]
Number of loans | Loan		1
Pre-modification outstanding recorded investment		$ 72
Post-modification outstanding recorded investment		71
Reserves included in and charge offs against the allowance for loan loss recognized at modification		$ 1

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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Reflects the amount of the write-down related to a troubled debt restructuring.

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-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
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-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554

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