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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2013
Related Party Transactions  
Schedule of revenues for services provided or related to the Funds

 

 
   2013   2012   2011  
 
   (in thousands)
  

Investment management fees

   $ 602,120     506,081     490,000  

Rule 12b-1 serve and distribution fees

     299,442     259,803     257,635  

Shareholder service fees

     137,093     128,109     122,449  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Total revenues

   $ 1,038,655     893,993     870,084  
               
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