XML 25 R2.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data
Jun. 30, 2011
Dec. 31, 2010
Consolidated Balance Sheets    
Accounts receivable, allowance for doubtful accounts (in dollars) $ 3,360 $ 2,796
Preferred Shares of beneficial interest, aggregate liquidation preference (in dollars) $ 216,333 $ 216,333
Preferred Shares of beneficial interest, par value (in dollars per share) $ 0.01 $ 0.01
Preferred Shares of beneficial interest, shares authorized 15,000,000 15,000,000
Preferred Shares of beneficial interest, shares issued 8,121,667 8,121,667
Preferred Shares of beneficial interest, shares outstanding 8,121,667 8,121,667
Common Shares of beneficial interest, par value (in dollars per share) $ 0.01 $ 0.01
Common Shares of beneficial interest, shares authorized 125,000,000 125,000,000
Common Shares of beneficial interest, shares issued 71,891,631 66,931,582
Common Shares of beneficial interest, shares outstanding 71,891,631 66,931,582