v2.4.0.6

SUBSEQUENT EVENTS - Additional Information (Detail)	1 Months Ended
	Aug. 08, 2011 USD ($)	Aug. 08, 2011 CNY	Feb. 21, 2011 USD ($)	Feb. 21, 2011 CNY	Feb. 24, 2012 Dividend Declared USD ($)	Feb. 24, 2012 Dividend Declared CNY	Mar. 29, 2012 Dividend Paid [Member]	Apr. 05, 2012 Dividend Paid [Member]
Subsequent Event [Line Items]
Dividend declared	$ 721,309,505	4,539,849,894	$ 42,948,709	270,314,878	$ 71,000,000	447,000,000
Dividend Rate					$ 0.30
Dividend payable date							Mar. 29, 2012	Apr. 05, 2012

X

- Definition

Common stock dividends declared and/or paid by an entity to common shareholders.

+ References

No definition available.

+ Details

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Namespace Prefix:	ga_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Per share dividends declared and paid during the period for each share of common stock outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	ga_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The day, month, and year (YYYY-MM-DD) that the dividend declared as of or prior to the financial reporting date will be paid in the subsequent period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

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Period Type:	duration

X

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration