Mortgage and Other Indebtedness - Consolidated Indebtedness by Type of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Participating Mortgage Loans [Line Items]
Principal	$ 1,201,640	$ 1,153,302
Unamortized Net Premiums	1,843	2,176
Unamortized Debt Issuance Costs	(7,366)	(8,898)
Total	1,196,117	1,146,580
Unsecured revolving credit facility
Participating Mortgage Loans [Line Items]
Principal	50,000	0
Unamortized Net Premiums	0	0
Unamortized Debt Issuance Costs	(1,857)	(2,625)
Total	48,143	(2,625)
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	(3,687)	(4,231)
Total	546,313	545,769
Unsecured term loan
Participating Mortgage Loans [Line Items]
Principal	250,000	250,000
Unamortized Net Premiums	0	0
Unamortized Debt Issuance Costs	(1,700)	(1,859)
Total	248,300	248,141
Mortgages notes payable \| Fixed rate debt
Participating Mortgage Loans [Line Items]
Principal	296,350	297,472
Unamortized Net Premiums	1,843	2,176
Unamortized Debt Issuance Costs	(30)	(40)
Total	298,163	299,608
Mortgages notes payable \| Variable rate debt
Participating Mortgage Loans [Line Items]
Principal	55,290	55,830
Unamortized Net Premiums	0	0
Unamortized Debt Issuance Costs	(92)	(143)
Total	$ 55,198	$ 55,687

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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.

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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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