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Other Expenses,Net (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Other Expenses, Net [Abstract]        
Interest income $ (3,190) $ (3,742) $ (6,172) $ (7,695)
Interest expense 12,883 14,671 25,954 29,634
Other (3,195) 5,051 (7,834) 5,448
Other expenses, net $ 6,498 $ 15,980 $ 11,948 $ 27,387