Debt - Scheduled Principal Payments on Mortgages and Notes Payable (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
2020 (remaining)	$ 1,785
2021	39,508
2022	52,397
2023	354,388
2024	125,879
Thereafter	583,082
Subtotal debt	1,157,039	$ 932,581
Unamortized premium	1,767	1,995
Unamortized deferred financing costs	(3,630)	(3,768)
Total notes payable	$ 1,155,176	$ 930,808

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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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.

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