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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]  
VALUATION AND QUALIFYING ACCOUNTS
 
SCHEDULE II –VALUATION AND QUALIFYING ACCOUNTS
 
(in thousands)
                                 
   
Balance at
Beginning
of Period
    
Charged to
Expense
    
Accounts
Written
Off
    
Balance at
End of
Period
  
                                 
Year ended December 31, 2012
                                
Deduction from asset accounts:
                                
Allowance for doubtful accounts
  
$
1,691
      
240
      
(317
)
  
$
1,614
  
                                 
Year ended December 31, 2013
                                
Deduction from asset accounts:
                                
Allowance for doubtful accounts
  
$
1,614
      
211
      
(111
)
  
$
1,714
  
                                 
Year ended December 31, 2014
                                
Deduction from asset accounts:
                                
Allowance for doubtful accounts
  
$
1,714
      
243
      
(107
)
  
$
1,850