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Consolidated Statements of Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Income Statement [Abstract]    
Revenues, Net From Related Parties $ 7,689 $ 8,141
Technical and operating charges from related parties 0 155
Related Party Transaction, Expenses from Transactions with Related Party $ 659 $ 794