XML 29 R22.htm IDEA: XBRL DOCUMENT v2.4.0.6
Significant Accounting Policies - Gold Receivable (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Gold Receivable      
Gold receivable $ 0 $ 0 $ 255,409