Investment in 111 West 57th Partners LLC - Investment in 111 West 57th Partners LLC, Summary (Details) - Investment in 111 West 57th Partners LLC [Member] $ in Thousands	Dec. 31, 2013 USD ($)
Schedule of Equity Method Investments [Line Items]
Company’s aggregate initial investment	$ 57,250
Company’s aggregate initial membership interest %	60.30%

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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