Supplemental Information to Statements of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Summary of Supplemental Information to Statements of Cash Flows
Interest paid	$ 9,438	$ 8,279
Income taxes paid	1,329	663
Non-Cash Investing and Financing Activities:
Issuance of common shares for board of trustees compensation	199	183
Mortgage loan assumed in connection with acquisition	0	42,000
Accrued additions and improvements to hotel properties	537	0
Common Shares [Member]
Non-Cash Investing and Financing Activities:
Distributions payable on shares/units	7,396	6,219
Preferred Shares [Member]
Non-Cash Investing and Financing Activities:
Distributions payable on shares/units	$ 3,813	$ 2,516