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Percentage of Investment in Unconsolidated Subsidiaries And Investees (Details)
Dec. 31, 2013
Percentage of Investment in Subsidiaries And Investees  
Investments minimum percentage in unconsolidated subsidiaries, jointly owned companies 20.00%
Investments maximum percentage in unconsolidated subsidiaries, jointly owned companies 50.00%
Interest in Eton Square, under equity method 0.00%