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Summary of Significant Accounting Policies - Merger (Details)			12 Months Ended
	Jan. 10, 2017	Jan. 10, 2017	Dec. 31, 2018
Colony NorthStar | Class A Common Stock
Business Acquisition [Line Items]
Business combination, stock exchange, conversion ratio	1.4663	1.4663	1.4663

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- Definition

Business Combination, Stock Exchange, Conversion Ratio

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