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Accounts Payable And Accrued Liabilities (Schedule Of Long-Term Accrued Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Jun. 30, 2013
Accounts Payable and Accrued Liabilities [Abstract]    
Amounts payable in respect of restructuring and other Special charges (note 17) $ 2,374 $ 2,919
Other accrued liabilities 31,316 10,172
Asset retirement obligations 7,796 4,758
Accrued liabilities $ 41,486 $ 17,849