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7. Carrying Amounts and Fair Value of Instruments (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Jun. 30, 2012
Carrying Value
   
Financial liabilities:    
Investment contracts $ 1,721,219 $ 2,054,657
Fair Value
   
Financial liabilities:    
Investment contracts $ 1,728,887 $ 2,061,222