Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v2.4.1.9
Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Statement of Financial Position [Abstract]    
Rents and other receivables, allowance for doubtful accounts $ 3,392us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables $ 6,783us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables
Preferred shares, par value $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare
Preferred shares, shares authorized 10,000us-gaap_PreferredStockSharesAuthorized 10,000us-gaap_PreferredStockSharesAuthorized
Preferred shares, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred shares, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Shares of beneficial interest, shares issued 67,819us-gaap_CommonStockSharesIssued 66,531us-gaap_CommonStockSharesIssued
Shares of beneficial interest, par value $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Shares of beneficial interest, shares authorized 100,000us-gaap_CommonStockSharesAuthorized 100,000us-gaap_CommonStockSharesAuthorized
Shares of beneficial interest, shares outstanding 67,819us-gaap_CommonStockSharesOutstanding 66,531us-gaap_CommonStockSharesOutstanding