Other comprehensive income release of unrealized loss on available for sale investments tax portion.

No definition available.

Name:	gai_OtherComprehensiveIncomeReleaseOfUnrealizedLossOnAvailableForSaleInvestmentsTaxPortion
Namespace Prefix:	gai_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Consolidated Statements of Operations and Comprehensive Income (Parenthetical) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Income Statement [Abstract]
Release of unrealized loss on available-for-sale investments, tax, upon disposal
Unrealized gain on available-for-sale investments, tax
Unrealized loss on available-for-sale investments, tax