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Depreciation and Amortization (Tables)
 3 Months Ended
Mar. 31, 2016
Text Block [Abstract]  
Depreciation and Amortization Expense Excluded from Operating Expenses in its Statements of Income and Comprehensive Income

The amounts of depreciation and amortization expense excluded from the following operating expenses in its Statements of Income and Comprehensive Income are:

 

     Three months ended
March 31,		  
     2016      2015  

Direct advertising expenses

    $ 47,798       $ 45,085   

General and administrative expenses

      881         723   

Corporate expenses

      2,810         3,422   
  

 

 

     

 

 

  
   $ 51,489       $ 49,230