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Debt - Narrative (Details)		12 Months Ended
	Apr. 27, 2021 USD ($)	Dec. 31, 2021 USD ($) jointVenture $ / shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jan. 23, 2017
Debt Instrument [Line Items]
Proceeds from issuance of senior unsecured notes, net		$ 96,267,000	$ 0	$ 0
Mortgages payable on operating real estate		$ 1,001,717,000
Number of joint venture investments | jointVenture		11
6.25% senior convertible notes due 2022 | Convertible Notes
Debt Instrument [Line Items]
Face amount		$ 138,000,000
Interest rate		6.25%			6.25%
Discount and deferred charges, net		$ 100,000	$ 2,700,000
Cost of debt, percentage		8.24%
Effective interest rate		96.00%
Convertible note, conversion ratio		0.1427144
Conversion price (in dollars per share) | $ / shares		$ 7.01
Five Point Seven Five Percent Senior Notes Due Two Thousand Twenty Six | Senior unsecured notes
Debt Instrument [Line Items]
Face amount	$ 100,000,000
Interest rate	5.75%
Debt instrument, percentage of principal issued	100.00%
Proceeds from issuance of senior unsecured notes, net	$ 96,300,000
Mortgages payable on operating real estate		$ 100,000,000
Deferred loan fees, net		$ 3,300,000
Debt issuance costs, amortization rate		6.64%
Five Point Seven Five Percent Senior Notes Due Two Thousand Twenty Six | Senior unsecured notes | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage	100.00%
Five Point Seven Five Percent Senior Notes Due Two Thousand Twenty Six | Senior unsecured notes | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage	100.00%
Debt instrument, redemption price, percentage multiplyer	2.875%
Five Point Seven Five Percent Senior Notes Due Two Thousand Twenty Six | Senior unsecured notes | Between BB+ And B+ Credit Rating
Debt Instrument [Line Items]
Interest rate increase	0.50%
Five Point Seven Five Percent Senior Notes Due Two Thousand Twenty Six | Senior unsecured notes | B+ Or Below Credit Rating
Debt Instrument [Line Items]
Interest rate increase	0.75%

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