Deconsolidation of and Retained Noncontrolling Investment in IAHGames at Fair Value and Recognized Gain (Parenthetical) (Detail) (Infocomm Asia Holdings Pte Ltd)	1 Months Ended	12 Months Ended
Aug. 15, 2012	Jul. 31, 2012	Dec. 31, 2011
Infocomm Asia Holdings Pte Ltd
Divestitures [Line Items]
Percentage of retained noncontrolling interest	20.00%	20.00%	80.00%

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section H

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration