XML 83 R52.htm IDEA: XBRL DOCUMENT v2.4.0.8
Accounts Payable And Accrued Liabilities (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Jun. 30, 2013
Accounts Payable and Accrued Liabilities [Abstract]    
Present value of asset retirement obligation $ 7.3 $ 5.7
Undiscounted value of asset retirement obligation $ 7.8 $ 6.1