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Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2020
Text Block [Abstract]  
Summary of accumulated other comprehensive income (loss) The changes in accumulated other comprehensive income (loss) for the years ended December 31, 2020, 2019 and 2018 were as follows:
   
Foreign
Currency
Translation
Adjustments
  
Derivative
Financial
Instruments
Designated as
Cash Flow Hedges
  
      Total      
 
(in thousands)
            
Balance at December 31, 2017
  
$
10
 
  
$
7
 
  
$
17
 
Gain (loss) arising during the period
   (207)    98    (109) 
Reclassification to earnings for (loss) realized
   —      (2)    (2) 
Income tax (expense)
   —      (25)    (25) 
   
 
 
   
 
 
   
 
 
 
Net other comprehensive income (loss) – year 2018
   (207)    71    (136) 
   
 
 
   
 
 
   
 
 
 
Balance at December 31, 2018
  
$
(197
) 
  
$
78
 
  
$
(119
) 
(Loss) arising during the period
   (129)    (181)    (310) 
Reclassification to earnings for gains realized
   —      32    32 
Income tax benefit
   —      39    39 
   
 
 
   
 
 
   
 
 
 
Net other comprehensive (loss) – year 2019
   (129)    (110)    (239) 
   
 
 
   
 
 
   
 
 
 
Balance at December 31, 2019
  
$
(326
) 
  
$
(32
) 
  
$
(358
) 
(Loss) arising during the period
   (187)    (113)    (300) 
Reclassification to earnings for gains realized
   —      121    121 
Income tax (expense)
   —      (2)    (2) 
   
 
 
   
 
 
   
 
 
 
Net other comprehensive income (loss) – year 2020
   (187)    6    (181) 
   
 
 
   
 
 
   
 
 
 
Balance at December 31, 2020
  
$
(513
) 
  
$
(26
) 
  
$
(539
)