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Other Expenses, Net (Tables)
3 Months Ended
Mar. 31, 2016
Other Expenses, Net [Abstract]  
Schedule of other expenses, net
  

Three-Month Periods

Ended March 31,

 
  2016  2015 
Interest income ($13,335) ($2,982)
Interest expense  35,598   13,071 
Debt issuance amortization  1,309   720 
Other (gains)  (185)  (5,359)
   Other expenses, net $23,387  $5,450