Fair Value of Assets and Liabilities (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended		3 Months Ended
	Sep. 30, 2013 Property	Sep. 30, 2013 Property	Sep. 30, 2012	Jun. 30, 2013 Sonesta agreements	Sep. 30, 2013 Sonesta agreements Property	Sep. 30, 2013 TravelCenters of America	Sep. 30, 2013 Quoted Prices in Active Markets for Identical Assets (Level 1) TravelCenters of America	Sep. 30, 2013 Recurring Fair Value	Sep. 30, 2013 Recurring Quoted Prices in Active Markets for Identical Assets (Level 1)	Sep. 30, 2013 Recurring Significant Unobservable Inputs (Level 3)
Fair Value of Assets and Liabilities
Investment securities								$ 19,939	$ 19,939
Property held for sale								4,074		4,074
Shares included in investment securities						2,540,000	2,540,000
Historical cost of securities							9,267
Loss on asset impairment	$ 5,837	$ 8,008	$ 889	$ 2,171
Per share loss on asset impairment (in dollars per share)				$ 0.02
Number of properties classified as held for sale	1	1			1