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Fair-Value Measurements (Tables)
6 Months Ended
Jun. 30, 2014
Fair-Value Measurements [Abstract]  
Schedule of Fair Value of Financial Assets and Liabilities

The following table presents the fair-value hierarchy for our Level 1 and Level 2 financial assets and liabilities measured at fair value on a recurring basis:

    June 30, 2014 December 31, 2013
    Quoted
prices

in active
markets
Significant
other

observable
inputs
Quoted
prices

in active
markets
Significant
other

observable
 inputs
(in thousands)   (Level 1) (Level 2) (Level 1) (Level 2)
Fair Value                  
Assets:                  
 Cash equivalents    $33,990    $-    $25,073    $-  
 Prepaid expenses and other current assets:                  
 Foreign currency instruments    273    -    -    -  
 Other Assets:                  
 Common stock of foreign public company    817    -    952    -  
 Interest rate swap    -    372  (a)  -    1,517  (c)
Liabilities:                  
 Other noncurrent liabilities:                  
 Interest rate swap    -    (2,337)  (b)  -   (3,119)  (d)
                   
  (a) Net of $4.5 million receivable floating leg and $4.1 million liability fixed leg
  (b) Net of $0.4 million receivable floating leg and $2.7 million liability fixed leg
  (c) Net of $5.6 million receivable floating leg and $4.1 million liability fixed leg
  (d) Net of $0.7 million receivable floating leg and $3.8 million liability fixed leg
Schedule of (Losses)/Gains on Changes in Fair Value of Derivative Instruments

Gains/ (losses) related to changes in fair value of derivative instruments that were recognized in Other (income)/expenses, net in the Statements of Income were as follows:

  Three months ended
June 30,
Six months ended
June 30,
(in thousands) 2014 2013 2014 2013
         
Derivatives not designated as hedging instruments        
 Forward exchange options $80  $- $154  $-