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Consolidated Statements of Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Income Statement [Abstract]        
Revenues, Net From Related Parties $ 7,525 $ 8,127 $ 15,214 $ 16,268
Technical and operating charges from related parties 0 155 0 310
Related Party Transaction, Expenses from Transactions with Related Party $ 890 $ 1,428 $ 1,549 $ 2,222