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Depreciation and Amortization
 12 Months Ended
Dec. 31, 2013
Text Block [Abstract]  
Depreciation and Amortization

(10) Depreciation and Amortization

The Company includes all categories of depreciation and amortization on a separate line in its Statements of Operations. The amounts of depreciation and amortization expense excluded from the following operating expenses in its Statements of Operations are:

 

     Year Ended December 31,  
     2013      2012      2011  

Direct expenses

    $ 283,280       $ 277,662       $ 283,720   

General and administrative expenses

      4,684         4,137         4,224   

Corporate expenses

      12,615         14,284         11,695   
  

 

 

     

 

 

     

 

 

  
   $ 300,579       $ 296,083       $ 299,639