Mortgage and Other Indebtedness - Consolidated Indebtedness by Type of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Participating Mortgage Loans [Line Items]
Principal	$ 1,325,508	$ 1,176,076
Unamortized Net Premiums	1,620	1,732
Unamortized Debt Issuance Costs	(11,880)	(7,014)
Total	1,315,248	1,170,794
Unsecured revolving credit facility
Participating Mortgage Loans [Line Items]
Principal	0	25,000
Unamortized Net Premiums	0	0
Unamortized Debt Issuance Costs	(1,541)	(1,672)
Total		23,328
Senior unsecured notes—fixed rate \| Fixed rate debt
Participating Mortgage Loans [Line Items]
Principal	550,000	550,000
Unamortized Net Premiums	0	0
Unamortized Debt Issuance Costs	(3,371)	(3,595)
Total	546,629	546,405
Unsecured term loan
Participating Mortgage Loans [Line Items]
Principal	250,000	250,000
Unamortized Net Premiums	0	0
Unamortized Debt Issuance Costs	(1,594)	(1,647)
Total	248,406	248,353
Exchangeable senior notes - fixed rate \| Fixed rate debt
Participating Mortgage Loans [Line Items]
Principal	175,000
Unamortized Net Premiums	0
Unamortized Debt Issuance Costs	(5,295)
Total	169,705
Mortgages notes payable \| Fixed rate debt
Participating Mortgage Loans [Line Items]
Principal	295,578	295,966
Unamortized Net Premiums	1,620	1,732
Unamortized Debt Issuance Costs	(22)	(25)
Total	297,176	297,673
Mortgages notes payable \| Variable rate debt
Participating Mortgage Loans [Line Items]
Principal	54,930	55,110
Unamortized Net Premiums	0	0
Unamortized Debt Issuance Costs	(57)	(75)
Total	$ 54,873	$ 55,035

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- Definition

Amount, after accumulated amortization, of debt premium.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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