Real Estate - Results of Discontinued Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Real Estate [Abstract]
Real estate rental revenue	$ 10,932	$ 29,511	$ 70,519	$ 89,673
Property operating and maintenance	(1,870)	(5,232)	(11,201)	(15,433)
Real estate taxes and insurance	(1,476)	(4,839)	(11,136)	(14,233)
Property management	(378)	(947)	(2,195)	(2,830)
Depreciation and amortization	0	(12,406)	(22,904)	(37,106)
Gain (loss) on sale of real estate	46,441	0	46,441	0
Income from discontinued operations	$ 53,649	$ 6,087	$ 69,524	$ 20,071
Basic net income per share (in dollars per share)	$ 0.63	$ 0.07	$ 0.82	$ 0.24
Diluted net income per share (in dollars per share)	$ 0.63	$ 0.07	$ 0.82	$ 0.24
Capital expenditures	$ 833	$ 4,239	$ 3,316	$ 11,825

Amount of capital expenditure attributable to discontinued operations.

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Amount after tax of (gain) loss recognized for the (reversal of write-down) write-down to fair value, less cost to sell, of a discontinued operation.

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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Disposal Group, Including Discontinued Operation, Property Management

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