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Consolidated Statements Of Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Statement [Abstract]      
Revenues, Net From Related Parties $ 32,195 $ 31,885 $ 29,203
Technical And Operating Charges From Related Parties 620 5,040 3,971
Selling, General And Administrative Charges (Credits) From Related Parties $ (206) $ 57,004 $ 100,230