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Accounts Payable And Accrued Liabilities (Schedule Of Long-Term Accrued Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Jun. 30, 2013
Accounts Payable and Accrued Liabilities [Abstract]    
Amounts payable in respect of restructuring and other Special charges (note 16) $ 2,361 $ 2,919
Other accrued liabilities 11,672 10,172
Asset retirement obligations 6,289 4,758
Accrued liabilities $ 20,322 $ 17,849