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Derivative Instruments and Hedging Activities - Pre-tax Effects of Derivative Instruments on Consolidated Statements of Income and Comprehensive Income (Detail) - Derivatives in Cash Flow Hedging Relationships [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	$ (4,982)	$ 11,722	$ (12,058)	$ 18,176
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	2,159	(599)	4,855	(3,281)
Interest Rate Swaps [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	(4,982)	11,672	(12,058)	18,099
Interest Rate Swaps [Member] | Interest Expense [Member]
Derivative [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	$ 2,159	(352)	$ 4,855	(2,475)
Interest Rate Caps [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives		50		77
Interest Rate Caps [Member] | Interest Expense [Member]
Derivative [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income		$ (247)		$ (806)

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- Definition

Amount of Gain(loss) recognized in OCI on Derivatives.

+ References

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Section 50
-Paragraph 4C
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-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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