Discontinued Operations - Summarized Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
OPERATING EXPENSES:
Income from discontinued operations, net of tax	$ 0	$ 2,578	$ 0	$ 9,769
Discontinued Operations [Member]
REVENUES:
Rental and other property revenues		37,331		113,005
OPERATING EXPENSES:
Property operating expenses		12,770		39,506
Depreciation and amortization		18,985		56,755
Other expenses, net		78		(403)
Total operating expenses		31,833		96,664
Interest income		548		1,622
Interest expense		(5,911)		(15,004)
Income from unconsolidated real estate partnerships		277		629
Income before income tax benefit		412		3,588
Income tax benefit		2,166		(6,181)
Income from discontinued operations, net of tax		2,578		9,769
Net loss attributable to noncontrolling interests in consolidated real estate partnerships		122		(341)
Net income from discontinued operations attributable to Spinnee		$ 2,700		$ 10,110