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Segments - Schedule of Identifiable Assets by Segment (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Segment Reporting Information [Line Items] |  |
Identifiable assets | $ 10,779,587 | $ 11,017,943
Global Investment Management [Member] |  |
Segment Reporting Information [Line Items] |  |
Identifiable assets | 913,563 | 936,491
Development Services [Member] |  |
Segment Reporting Information [Line Items] |  |
Identifiable assets | 188,762 | 124,715
Corporate [Member] |  |
Segment Reporting Information [Line Items] |  |
Identifiable assets | 816,791 | 627,553
Americas [Member] |  |
Segment Reporting Information [Line Items] |  |
Identifiable assets | 5,555,400 | 5,940,400
EMEA [Member] |  |
Segment Reporting Information [Line Items] |  |
Identifiable assets | 2,592,800 | 2,722,721
Asia Pacific [Member] |  |
Segment Reporting Information [Line Items] |  |
Identifiable assets | $ 712,271 | $ 666,063

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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