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Investments (Tables)
 12 Months Ended
Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investments

Investments held are summarized as follows (in thousands):

 

     December 31, 2015      December 31, 2014  
     Short-Term      Long-Term      Short-Term      Long-Term  

Municipal debt securities

    $ 8,608       $ 34,858       $ 5,539       $ 35,827   

Federal home loan securities

      —           26,715         —           27,030   

Certificates of deposit

      245         1,715         496         1,225   
  

 

 

     

 

 

     

 

 

     

 

 

  
   $ 8,853       $ 63,288       $ 6,035       $ 64,082   
  

 

 

     

 

 

     

 

 

     

 

 

  
Schedule of Contractual Maturities of Long-Term Investments

Contractual maturities of long-term investments are summarized as follows (in thousands):

 

     December 31,  
     2015      2014  

Due after one year through five years

    $ 60,383       $ 54,959   

Due after five years through six years

      2,905         9,123   
  

 

 

     

 

 

  
   $ 63,288       $ 64,082