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Summary of Disposition of Property (Parenthetical) (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Real Estate [Abstract]
Gain (loss) for properties, debt prepayment premium costs	$ 5,233

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- Definition

Gain (Loss) for properties, debt prepayment premium costs.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_RealEstateAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration