v2.4.0.8

Unconsolidated Entities - Summary of Unconsolidated Co-investment Ventures (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Jun. 30, 2014 sqft | Dec. 31, 2013 | Sep. 30, 2014 Unconsolidated Co-Investment Ventures [Member] Property sqft | Dec. 31, 2013 Unconsolidated Co-Investment Ventures [Member] sqft Property | Sep. 30, 2013 Unconsolidated Co-Investment Ventures [Member] Property sqft | Sep. 30, 2014 Investment Management [Member] Unconsolidated Co-Investment Ventures [Member] Americas [Member] Property sqft | Dec. 31, 2013 Investment Management [Member] Unconsolidated Co-Investment Ventures [Member] Americas [Member] sqft Property | Sep. 30, 2013 Investment Management [Member] Unconsolidated Co-Investment Ventures [Member] Americas [Member] sqft Property | Sep. 30, 2014 Investment Management [Member] Unconsolidated Co-Investment Ventures [Member] Europe [Member] Property sqft | Dec. 31, 2013 Investment Management [Member] Unconsolidated Co-Investment Ventures [Member] Europe [Member] Property sqft | Sep. 30, 2013 Investment Management [Member] Unconsolidated Co-Investment Ventures [Member] Europe [Member] sqft Property | Sep. 30, 2014 Investment Management [Member] Unconsolidated Co-Investment Ventures [Member] Asia [Member] sqft Property | Dec. 31, 2013 Investment Management [Member] Unconsolidated Co-Investment Ventures [Member] Asia [Member] sqft Property | Sep. 30, 2013 Investment Management [Member] Unconsolidated Co-Investment Ventures [Member] Asia [Member] sqft Property
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Schedule Of Equity Method Investments Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties owned |  |  |  | 1,494 | 1,323 | 1,308 | 814 | 709 | 737 | 629 | 571 | 534 | 51 | 43 | 37
Square feet |  | 12,600,000 |  | 301,751,000 | 264,293,000 | 257,569,000 | 130,476,000 | 108,537,000 | 114,042,000 | 145,332,000 | 132,876,000 | 124,794,000 | 25,943,000 | 22,880,000 | 18,733,000
Total assets | $ 24,072,103 |  | $ 24,572,307 | $ 25,713,935 | $ 23,865,250 | $ 23,382,115 | $ 9,395,900 | $ 8,014,339 | $ 8,433,418 | $ 11,951,749 | $ 11,818,786 | $ 11,471,358 | $ 4,366,286 | $ 4,032,125 | $ 3,477,339

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