Investments in Unconsolidated Entities (Details)	Mar. 31, 2018 USD ($)
Schedule of Equity Method Investments [Line Items]
Unamortized Investment In Joint Venture Primarily Attributable To Real Estate And Related Intangible Assets	$ 108,549,000
Sunrise Senior Living Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Unamortized Investment In Joint Venture Primarily Attributable To Real Estate And Related Intangible Assets	$ 108,549,000

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.

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