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FAIR VALUE MEASUREMENTS (Tables)
12 Months Ended
Dec. 31, 2016
FAIR VALUE MEASUREMENTS  
Schedule of the valuation of financial instruments measured at fair value on a recurring basis
    Fair Value Measurements at December 31, 2016 with:        
(in thousands)   Total     Quoted prices in
active markets for
identical assets
    Significant
other
observable
inputs
    Significant 
unobservable
inputs
 
          (Level 1)     (Level 2)     (Level 3)  
Assets:                                
Available-for-sale securities:                                
Municipal Obligations   $ 9,330     $     $ 9,330     $  
Corporate Obligations                        
    $ 9,330     $     $ 9,330     $  
Investments measured at Net Asset Value-Trading securities   $ 5,547                          
                                 
    Fair Value Measurements at December 31, 2015 with:        
(in thousands)   Total     Quoted prices in
active markets for
identical assets
    Significant
other
observable
inputs
    Significant 
unobservable
inputs
 
          (Level 1)     (Level 2)     (Level 3)  
Assets:                                
Available-for-sale securities:                                
Municipal Obligations   $ 30,996     $     $ 30,996     $  
Corporate Obligations     3,958             3,958        
    $ 34,954     $     $ 34,954     $  
Investments measured at Net Asset Value-Trading securities   $ 6,491