Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Other Assets (Narrative) (Details)

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Other Assets (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Other Assets [Abstract]      
Amortization of debt issuance costs $ 33,001 $ 26,410 [1],[2] $ 16,364
Debt issuance cost amortization period, start range 2012    
Debt issuance cost amortization period, end range 2023    
[1] Includes the results of Genesis for the period from March 25, 2010 (date of acquisition) to December 31, 2010 and the issue of shares to Genesis and Waha.
[2] The Amalgamation gain, net of transaction expenses of $274, as presented in the consolidated income statement, consists of the Amalgamation gain of $31,023, as presented in the consolidated statement of cash flow and transaction expenses of $30,749 (Note 1).