Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands													6 Months Ended	12 Months Ended
	Dec. 14, 2022	Feb. 28, 2018	Feb. 20, 2018	Oct. 24, 2017	Jul. 25, 2017	Apr. 25, 2017	Feb. 28, 2017	Nov. 01, 2016	Aug. 02, 2016	May 03, 2016	Mar. 08, 2016	Jul. 07, 2015	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Stock issuance cost													$ 8,212	$ 3,526
Conversion of common shares														2,603,554
Cash dividend declared				$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25		$ 0.50	$ 1.00	$ 1.00
Date dividends to be paid				Jan. 11, 2018	Oct. 12, 2017	Jul. 13, 2017	Apr. 13, 2017	Jan. 12, 2017	Oct. 13, 2016	Jul. 14, 2016	Apr. 14, 2016
Dividends payable, date of record				Dec. 29, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Declaration Date				Oct. 24, 2017	Jul. 25, 2017	Apr. 25, 2017	Feb. 28, 2017	Nov. 01, 2016	Aug. 02, 2016	May 03, 2016	Mar. 08, 2016
Subsequent Event [Member]
Class of Stock [Line Items]
Date dividends to be paid			Apr. 12, 2018
Dividends payable, date of record			Mar. 31, 2018
Operating Partnership [Member]
Class of Stock [Line Items]
Conversion of units into class A shares														3,958,182
Operating Partnership [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Conversion of units into class A shares		1,626,682
Class A Common Shares [Member]
Class of Stock [Line Items]
Common shares, issued														32,415,734	25,843,251
Common shares, outstanding												24,584,000	24,818,000	32,415,734	25,843,251
Conversion of units into class A shares														3,958,182
Common shares, par value												$ 0.01		$ 0.01	$ 0.01
Cash dividend declared													$ 0.50	$ 1.00	$ 1.00
Class A Common Shares [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Cash dividend declared			$ 0.25
Class A Common Shares [Member] | Rights Offering [Member]
Class of Stock [Line Items]
Common shares, issued												22,332,037
Common shares price per share												$ 29.58
Aggregate proceeds from issuance of common shares												$ 660,600
Stock issuance cost												$ 8,200
Class A Common Shares [Member] | General Growth Properties, Inc. [Member]
Class of Stock [Line Items]
Common shares, issued												1,125,760
Common shares price per share												$ 29.58
Aggregate proceeds from issuance of common shares												$ 33,300
Class A Common Shares [Member] | Simon Property Group Inc [Member]
Class of Stock [Line Items]
Common shares, issued												1,125,760
Common shares price per share												$ 29.58
Aggregate proceeds from issuance of common shares												$ 33,300
Class B Non-Economic Common Shares [Member]
Class of Stock [Line Items]
Common shares, par value												$ 0.01
Class B Non-Economic Common Shares [Member] | ESL [Member]
Class of Stock [Line Items]
Common shares, issued												1,589,020		1,328,866
Aggregate proceeds from issuance of common shares												$ 900
Common shares, outstanding														1,328,866
Common shares surrendered														260,154
Class C Non Voting Common Shares [Member]
Class of Stock [Line Items]
Common shares, issued												6,790,635		3,151,131
Common shares price per share												$ 29.58
Aggregate proceeds from issuance of common shares												$ 200,900
Common shares, outstanding														3,151,131
Conversion of common shares													3,151,131	2,603,554
Common shares, par value												$ 0.01
Class C Non Voting Common Shares [Member] | Operating Partnership [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Conversion of units into class A shares		1,626,682
Series A Cumulative Redeemable Preferred Shares [Member]
Class of Stock [Line Items]
Preferred shares, issued														2,800,000
Percentage of preferred dividend rate														7.00%
Preferred shares public offering price per share														$ 25.00
Net proceeds from public offering														$ 66,700
Series A Cumulative Redeemable Preferred Shares [Member] | Scenario, Forecast [Member]
Class of Stock [Line Items]
Preferred shares redemption price per share plus any accrued and unpaid dividends	$ 25.00
Series A Cumulative Redeemable Preferred Shares [Member] | Scenario, Forecast [Member] | Maximum [Member]
Class of Stock [Line Items]
Preferred shares redemption threshold period	120 days
Class C Common Shares [Member]
Class of Stock [Line Items]
Common shares, issued														3,151,131	5,754,685
Common shares, outstanding												6,790,000	6,773,000	3,151,131	5,754,685
Common shares, par value														$ 0.01	$ 0.01
Cash dividend declared													$ 0.50	$ 1.00	$ 1.00
Class C Common Shares [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Cash dividend declared			$ 0.25
Series A Preferred Shares [Member]
Class of Stock [Line Items]
Common shares, outstanding														2,800,000
Preferred shares, issued														2,800,000
Date dividends to be paid														Apr. 16, 2018
Dividends payable, date of record														Mar. 30, 2018
Declaration Date														Feb. 20, 2018
Preferred stock dividend per share														$ 0.593056
Dividend covers terms														The dividend covers the period from, and including, December 14, 2017 to, but excluding, April 15, 2018.