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Derivative Instruments and Hedging Activities - Fair Values of Derivative Financial Instruments as well as Their Classification on Statement of Financial Condition (Detail) - Derivatives Designated as Hedging Instruments [Member] - Other Assets [Member] - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Derivative [Line Items]
Fair Value	$ 14,968	$ 31,881
Interest Rate Swaps [Member]
Derivative [Line Items]
Fair Value	$ 14,968	$ 31,881

X

- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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- Details

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