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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2018
Stockholders' Equity Note [Abstract]  
Schedule of Comprehensive Income (Loss)
The cumulative balance of each component of other comprehensive income (loss) and the income tax effects allocated to each component are as follows (in thousands):
 
Beginning
Balance
 
Before-Tax
Amount
 
Tax
Effect
 
Net-of-Tax
Amount
 
Ending
Balance
December 31, 2016
 
 
 
 
 
 
 
 
 
Pension and other postretirement actuarial items
$
(4,417
)
 
$
(3,505
)
 
$
544

 
$
(2,961
)
 
$
(7,378
)
Reclassification adjustment for recognition of actuarial items

 
271

 
(38
)
 
233

 
233

Foreign currency translation adjustment
(28,704
)
 
(4,488
)
 
—

 
(4,488
)
 
(33,192
)
 
$
(33,121
)
 
$
(7,722
)
 
$
506

 
$
(7,216
)
 
$
(40,337
)
December 31, 2017
 
 
 
 
 
 
 
 
 
Pension and other postretirement actuarial items
$
(7,145
)
 
$
(1,465
)
 
$
112

 
$
(1,353
)
 
$
(8,498
)
Reclassification adjustment for recognition of actuarial items

 
583

 
(145
)
 
438

 
438

Foreign currency translation adjustment
(33,192
)
 
5,654

 
148

 
5,802

 
(27,390
)
 
$
(40,337
)
 
$
4,772

 
$
115

 
$
4,887

 
$
(35,450
)
December 31, 2018
 
 
 
 
 
 
 
 
 
Pension and other postretirement actuarial items
$
(8,060
)
 
$
1,392

 
$
(18
)
 
$
1,374

 
$
(6,686
)
Reclassification adjustment for recognition of actuarial items

 
685

 
(145
)
 
540

 
540

Foreign currency translation adjustment
(27,390
)
 
(3,857
)
 
(72
)
 
(3,929
)
 
(31,319
)
 
$
(35,450
)
 
$
(1,780
)
 
$
(235
)
 
$
(2,015
)
 
$
(37,465
)