Supplemental Information to Statements of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Dividends Payable [Line Items]
Interest paid, net of capitalized interest	$ 17,587	$ 12,539
Interest capitalized	193	0
Income taxes paid	1,824	1,487
Distributions payable on shares/units	29,523		$ 23,293
Issuance of common shares for Board of Trustees compensation	373	421
Below (above) market rate contracts assumed in connection with acquisition	20,110	2,473
Capital lease obligation assumed in connection with acquisition	0	10,758
Accrued additions and improvements to hotel properties	2,299	3,697
Write-off of fully depreciated furniture, fixtures and equipment	3,550	0
Write-off of deferred financing costs	321	0
Common Shares [Member]
Dividends Payable [Line Items]
Distributions payable on shares/units	23,973	15,472
Preferred Shares [Member]
Dividends Payable [Line Items]
Distributions payable on shares/units	$ 5,550	$ 5,202