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Accounts Payable And Accrued Liabilities (Schedule Of Long-Term Accrued Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Jun. 30, 2012
Accounts Payable and Accrued Liabilities [Abstract]    
Amounts payable in respect of restructuring and other Special charges (note 16) $ 2,919 $ 1,803
Other accrued liabilities 10,172 8,538
Asset retirement obligations 4,758 3,625
Accrued liabilities $ 17,849 $ 13,966