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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2013
Assets Measured at Fair Value on Recurring Basis

As of December 31, 2012, the Company held certain assets that are required to be measured at fair value on a recurring basis, as follows:

 

     Fair Value Measurements at Reporting Date Using  
(in thousands)    December 31,
2012
     Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
     Significant Other
Observable Inputs
(Level 2)
     Significant
Unobservable Inputs
(Level 3)
 

Available-for-sale securities

   $ 31,631       $ 14,442       $ 17,189       $ —