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Accounts Payable And Accrued Liabilities (Schedule Of Long-Term Accrued Liabilities) (Details) (USD $)
In Thousands
Jun. 30, 2011
Jun. 30, 2010
Accounts Payable And Accrued Liabilities    
Amounts payable in respect of restructuring and other special charges (note 16) $ 652 $ 582
Accruals relating to acquisitions 2,301 2,514
Other accrued liabilities 6,950 9,982
Asset retirement obligations 3,824 2,677
Accrued liabilities (note 9) $ 13,727 $ 15,755