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Segments - Schedule of Investments in Unconsolidated Subsidiaries by Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Investments in unconsolidated subsidiaries	$ 232,238	$ 217,943
Global Investment Management [Member]
Segment Reporting Information [Line Items]
Investments in unconsolidated subsidiaries	87,501	84,534
Development Services [Member]
Segment Reporting Information [Line Items]
Investments in unconsolidated subsidiaries	118,345	115,326
Americas [Member]
Segment Reporting Information [Line Items]
Investments in unconsolidated subsidiaries	20,202	17,380
EMEA [Member]
Segment Reporting Information [Line Items]
Investments in unconsolidated subsidiaries	388	392
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Investments in unconsolidated subsidiaries	$ 5,802	$ 311

X

- Definition

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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