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Accumulated Other Comprehensive Income
 6 Months Ended
Jun. 30, 2018
Accumulated Other Comprehensive Income [Abstract]  
Accumulated Other Comprehensive Income
Note 10.  Accumulated Other Comprehensive Income

Changes in Accumulated Other Comprehensive Income by Component (in thousands)
 
 
 
Three Months Ended June 30, 2018
 
 
 
Foreign
Currency
Translation
Adjustments
  
Unrecognized
Postretirement
Benefit Costs
(Credit)
  
Total
 
Balance at March 31, 2018
 
$
(2,006
)
 
$
111
  
$
(1,895
)
Other comprehensive income before reclassifications
  
(5,935
)
  
7
   
(5,928
)
Amounts reclassified from accumulated other comprehensive income
  
—
   
(7
)
  
(7
)
Other comprehensive income, net
  
(5,935
)
  
—
   
(5,935
)
Balance at June 30, 2018
 
$
(7,941
)
 
$
111
  
$
(7,830
)
  
Six Months Ended June 30, 2018
 
  
Foreign
Currency
Translation
Adjustments
  
Unrecognized
Postretirement
Benefit Costs
(Credit)
  
Total
 
Balance at December 31, 2017
 
$
(4,225
)
 
$
116
  
$
(4,109
)
Other comprehensive income before reclassifications
  
(3,716
)
  
7
   
(3,709
)
Amounts reclassified from accumulated other comprehensive income
  
—
   
(12
)
  
(12
)
Other comprehensive income, net
  
(3,716
)
  
(5
)
  
(3,721
)
Balance at June 30, 2018
 
$
(7,941
)
 
$
111
  
$
(7,830
)
 
Reclassifications Out of Accumulated Other Comprehensive Income (in thousands)
 

Details About Accumulated Other Comprehensive Income Components
 
Three Months Ended
June 30, 2018
  
Six Months Ended
June 30, 2018
 
Amortization of postretirement benefit plans:
      
Prior service benefit (1)
 
$
—
  
$
—
 
Unrecognized gain (1)
  
(12
)
  
(21
)
Total before income tax
  
(12
)
  
(21
)
Income tax expense
  
5
   
9
 
Total reclassifications for the period
 
$
(7
)
 
$
(12
)
(1)
These accumulated other comprehensive income components are included in the computation of net periodic postretirement benefit costs, which are included in other non-operating income, net in our consolidated statements of operations (see Note 12 for additional details).