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Beneficiaries Equity of the Parent Company - Textual (Details) - USD ($)		3 Months Ended			9 Months Ended
	Sep. 15, 2020	Jun. 30, 2020	Mar. 31, 2020	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Jan. 03, 2019
Class of Stock [Line Items]
Dividends, common stock	$ 32,700,000
Shares repurchased and retired (in shares)					6,248,483	1,337,169
Share price (in dollars per share)					$ 9.60	$ 12.92
Value of stock repurchased and retired		$ 6,141,000	$ 53,858,000	$ 17,281,000	$ 60,000,000.0	$ 17,300,000
Maximum
Class of Stock [Line Items]
Share repurchase, authorized amount							$ 150,000,000.0
Dividend declared
Class of Stock [Line Items]
Dividends payable (in dollars per share)	$ 0.19
Redeemable Common Limited Partnership Units
Class of Stock [Line Items]
Redeemable common limited partnership units (in shares)					981,634	981,626