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Consolidated Statements of Changes in Equity (Parenthetical) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Net loss attributable to redeemable noncontrolling interest $ 484,000 $ 519,000
Payments for repurchase of redeemable noncontrolling interest   8,800,000
Strategic Venture, Commercial Operating Properties
   
Properties acquired in joint venture   $ 9,400,000