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	Jun. 28, 2013 USD ($)
Investment in 111 West 57th Partners LLC [Abstract]
Company’s aggregate initial investment	$ 57,250
Company’s aggregate initial membership interest %	60.30%