Disposals and Discontinued Operations - Discontinued Operations (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 property	Dec. 31, 2016 USD ($)	Jan. 31, 2013 USD ($)
Income from discontinued operations, net of tax	$ 7,000	$ 15,895
Deferred gain on sale of asset					$ 7,000
Rochester Portfolio
Number of hotels sold | property				4
Gain on sale of hotels and other assets, net	7,000
Total liability related to pension plan						$ 14,000
Rochester Portfolio | Sold, considered a discontinued operation
Number of hotels sold | property				4
Gain on sale of hotels and other assets, net	7,000	16,000
Income tax provision included in discontinued operations		(105)
Income from discontinued operations, net of tax	7,000	15,895
Preferred equity investment		25,000
Proceeds received on sale of preferred equity investment and settlement of loan		$ 16,000
Hotel retirement plans | Rochester Portfolio
Deferred gain on sale of portfolio						14,000
Reduction in pension plan liability	$ 7,000		$ 7,000
Maximum | Hotel retirement plans | Rochester Portfolio
Total liability related to pension plan						$ 14,000