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Accumulated Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2016
Equity [Abstract]  
Accumulated Other Comprehensive Income (Activity)
The activity for each item of accumulated other comprehensive loss is as follows (in thousands):
 
Foreign
currency items
 
Pension and
postretirement
benefits plans
 
Accumulated other
comprehensive
loss
Beginning balance, January 1, 2015
$
(16,507
)
 
$
(20,781
)
 
$
(37,288
)
Net current period change
(4,572
)
 
1,720

 
(2,852
)
Reclassification adjustments for losses reclassified into income
—

 
486

 
486

Ending balance, December 31, 2015
$
(21,079
)
 
$
(18,575
)
 
$
(39,654
)
Net current period change
(3,234
)
 
(6,347
)
 
(9,581
)
Reclassification adjustments for losses reclassified into income
—

 
390

 
390

Ending balance, December 31, 2016
$
(24,313
)
 
$
(24,532
)
 
$
(48,845
)
Related Tax Effects Allocated to Each Component of Accumulated Other Comprehensive Income
The related tax effects allocated to each component of other comprehensive (loss) income for the years ended December 31, 2016 and 2015 are as follows (in thousands):
2016
Before Tax
Amount
 
Tax (Expense)
Benefit
 
After Tax Amount
Retirement benefits adjustment:
 
 
 
 
 
Net actuarial loss and prior service credit
$
(6,553
)
 
$
206

 
$
(6,347
)
Reclassification of actuarial loss and prior service cost to net income
507

 
(117
)
 
390

Net unrealized loss
(6,046
)
 
89

 
(5,957
)
Cumulative translation adjustment
(3,235
)
 
1

 
(3,234
)
Total other comprehensive loss
$
(9,281
)
 
$
90

 
$
(9,191
)
 
 
 
 
 
 
2015
Before Tax
Amount
 
Tax (Expense)
Benefit
 
After Tax Amount
Retirement benefits adjustment:
 
 
 
 
 
Net actuarial gain and prior service credit
$
2,169

 
$
(449
)
 
$
1,720

Reclassification of actuarial loss and prior service cost to net income
616

 
(130
)
 
486

Net unrealized loss
2,785

 
(579
)
 
2,206

Cumulative translation adjustment
(4,596
)
 
24

 
(4,572
)
Total other comprehensive loss
$
(1,811
)
 
$
(555
)
 
$
(2,366
)