Investment in Marketable Securities (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Investment in Marketable Securities (Textual) [Abstract]
Investment in marketable securities	$ 181,879,000		$ 181,879,000		$ 177,431,000
Impairment on securities included as a component of realized gain (loss)	136,029,000		136,029,000		138,318,000
Net accumulated other comprehensive income			45,850,000		39,113,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,977,000		2,977,000		10,712,000
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	546,000		546,000		2,242,000
Impairments on available for sale securities	1,327,000	$ 0	1,327,000	$ 0
Dividend Income, Operating	2,650,000	$ 2,390,000	7,950,000	$ 7,853,000
Xenia Hotels and Resorts, Inc. [Member]
Investment in Marketable Securities (Textual) [Abstract]
Investment in marketable securities	86,069,000		86,069,000		86,919,000
Impairment on securities included as a component of realized gain (loss)	$ 80,748,000		$ 80,748,000		$ 80,748,000
Investment Owned, Percent of Net Assets	5.00%		5.00%		5.00%
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	$ 5,321,000		$ 5,321,000		$ 6,171,000