Other Investments - Additional information (Detail)	12 Months Ended			144 Months Ended	12 Months Ended
Other Investments - Additional information (Detail)	Dec. 31, 2012 USD ($)	Dec. 31, 2012 AUD	Dec. 31, 2011 AUD	Dec. 31, 2012 AUD	Dec. 31, 2011 Other Investments AUD	Dec. 31, 2009 Other Investments AUD
Schedule of Held-to-maturity Securities [Line Items]
Investment						2,784,000
Receipt from investment redeemed			1,933,000	3,205,000	1,695,000
Provision for impairment of investment	$ 718,000	692,000	5,654,000	6,346,000	719,000

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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+ Details

- Definition

The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.

+ References

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+ Details

LEGEND INTERNATIONAL HOLDINGS INC 10-K/A