Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 200		$ 270
Mortgage loan premium	5,350	[1]	5,888	[1]
Preferred shares of beneficial interest, liquidation preference value	$ 325,000		$ 325,000
Preferred shares of beneficial interest, par value	$ 0.01		$ 0.01
Preferred shares of beneficial interest, shares authorized	100,000,000		100,000,000
Preferred shares of beneficial interest, shares issued	13,000,000		13,000,000
Preferred shares of beneficial interest, shares outstanding	13,000,000		13,000,000
Common shares of beneficial interest, par value	$ 0.01		$ 0.01
Common shares of beneficial interest, shares authorized	500,000,000		500,000,000
Common shares of beneficial interest, shares issued	63,764,929		63,709,628
Common shares of beneficial interest, shares outstanding	63,764,929		63,709,628

[1] Loan premiums on assumed mortgages recorded in purchase accounting and secured by the leasehold interest on the Hotel Palomar San Francisco, Embassy Suites San Diego Bay - Downtown and Hotel Modera.