Basis of Presentation and Summary of Significant Accounting Policies - Weighted Average Interests in Operating Partnership (Details) - Operating Partnership	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Noncontrolling Interest [Line Items]
Parent Company’s weighted average interest in Operating Partnership	97.40%	97.60%	97.60%
Limited partners' weighted average interests in Operating Partnership	2.60%	2.40%	2.40%

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.

No definition available.

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