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Consolidated Statements Of Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Income Statement [Abstract]        
Net revenues from related parties $ 8,127 $ 8,102 $ 16,268 $ 16,175
Technical and operating charges from related parties 155 310 310 310
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party $ 1,428 $ 1,108 $ 2,222 $ 3,104