Noncontrolling Interests - Additional Information (Detail)		1 Months Ended	12 Months Ended
	Nov. 20, 2017 USD ($) $ / shares	Sep. 30, 2012 USD ($) shares	Dec. 31, 2019 $ / shares shares	Dec. 31, 2016 USD ($) Subsidiary Building $ / shares shares	Dec. 31, 2018 $ / shares shares
Noncontrolling Interest [Line Items]
Special units issued (shares)		100
Value of special units issued | $		$ 1,000
Preferred stock, shares issued			0		0
Preferred stock, shares outstanding			0		0
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.01		$ 0.01
OP Units Holder
Noncontrolling Interest [Line Items]
Cumulative non-compounded annual pre-tax return percentage - in addition to capital invested received			6.50%
Percentage return of net sales proceeds received upon disposition of Operating Partnership's assets			85.00%
Special Units Holder
Noncontrolling Interest [Line Items]
Percentage return of net sales proceeds received upon disposition of Operating Partnership's assets			15.00%
Redeemable Preferred Stock | Subsidiary REITs
Noncontrolling Interest [Line Items]
Number of subsidiary real estate investment trusts acquired | Subsidiary				4
Number of buildings owned by each subsidiary real estate investment trust | Building				1
Aggregate purchase price of subsidiary REITs | $				$ 106,300,000
Annual preferred dividend rate				12.50%
Preferred stock, shares issued				500
Preferred stock, shares outstanding				500
Preferred stock, par value (in dollars per share) | $ / shares				$ 1,000
Preferred stock, aggregate amount | $				$ 500,000
Preferred stock, redemption value (in dollars per share) | $ / shares	$ 1,000
Payments for repurchase of preferred stock | $	$ 600,000