Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Acquisitions - Additional Information (Detail) (USD $)			9 Months Ended		0 Months Ended
Acquisitions - Additional Information (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Heat Energy Group, LLC [Member]	Sep. 30, 2014 Remate Lince [Member]	Aug. 13, 2014 Cornish And Carey Commercial [Member]	Aug. 13, 2014 Cornish And Carey Commercial [Member] Real Estate Services Segment [Member]
Business Acquisition [Line Items]
Acquisition date			2014-02
Acquisition date				May 09, 2014
Total consideration transferred					$ 77,100,000
Goodwill related to acquisition	$ 244,805,000	$ 163,339,000				$ 61,700,000