Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended	3 Months Ended
	Oct. 31, 2019	Dec. 31, 2019
Class J Cumulative Redeemable Preferred Shares [Member] | Forecast [Member]
Subsequent Event [Line Items]
Preferred stock redemption premium		$ 7.2
Subsequent Event [Member]
Subsequent Event [Line Items]
Common shares, issued	13,225
Net proceeds from issuance of common shares	$ 195.0
Subsequent Event [Member] | Class J Cumulative Redeemable Preferred Shares [Member]
Subsequent Event [Line Items]
Preferred stock, liquidation preference, value	$ 200.0
Preferred stock dividend rate	6.50%
Cumulative redeemable preferred shares, liquidation value	$ 500
Per share price of depositary share	25.00
Redeemable preferred stock dividend per share prorated to redemption date	3.7917
Redeemable preferred stock dividend per depositary share prorated to redemption date	$ 0.1896
Shopping Center [Member] | Austin, Texas [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Purchase price	$ 12.6