Supplemental Information to Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Non Cash Investing and Financing Information [Line Items]
Interest paid, net of capitalized interest	$ 41,416	$ 38,128	$ 26,945
Interest capitalized	492	598	0
Income taxes paid	369	2,487	3,049
Distributions payable on shares/units	33,215	29,869
Issuance of common shares for Board of Trustees compensation	606	372	421
Mortgage loans assumed	0	0	50,725
Below (above) market rate contracts assumed in connection with acquisition	0	20,110	15,375
Capital lease obligation assumed in connection with acquisition	0	0	10,758
Accrued additions and improvements to hotel properties	4,717	1,262	6,537
Write-off of fully depreciated furniture, fixtures and equipment	0	6,013	4,446
Write-off of deferred financing costs	$ 1,836	$ 1,577	$ 2,258
Long Term Incentive Partnership Units Converted to Common Units	0	0	258,101
Common Shares [Member]
Non Cash Investing and Financing Information [Line Items]
Distributions payable on shares/units	$ 29,773	$ 24,319	$ 17,743
Preferred Shares [Member]
Non Cash Investing and Financing Information [Line Items]
Distributions payable on shares/units	3,442	5,550	5,550
Manhattan Collection Joint Venture [Member]
Non Cash Investing and Financing Information [Line Items]
Mortgage loans assumed	190,000	0	0
Investment in hotel properties	$ 319,800	$ 0	$ 0