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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2013
Fair Value Measurements [Abstract]  
Fair value information related to assets
                                 
          Fair Value Measurements at March 31, 2013 Using  

Description

  March 31,
2013
    Quoted Prices
in Active
Markets

(Level 1)
    Significant
Other
Observable
Inputs
(Level 2)
    Significant
Unobserved
Inputs

(Level 3)
 
    (in thousands)  

Money market funds

  $ 679     $ 679     $ —       $ —    

Other mutual funds

    1,289       1,289       —         —    
   

 

 

   

 

 

   

 

 

   

 

 

 

Total

  $ 1,968     $ 1,968     $ —       $ —