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Accumulated Other Comprehensive Income (Loss) (Tables)
 3 Months Ended
Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Summary of Other Comprehensive (Loss) Income
The other comprehensive income consists of the following components:
 
  
Three Months Ended March 31
  
2017
 
2016
  
Before-Tax
 
Income
 
After-Tax
 
Before-Tax
 
Income
 
After-Tax
(in thousands)
Amount
 
Tax
 
Amount
 
Amount
 
Tax
 
Amount
Foreign currency translation adjustments:
  
 
  
 
  
 
  
 
  
 
  
Translation adjustments arising during the period
$
13,668

 
$
—

 
$
13,668

 
$
3,845

 
$
—

 
$
3,845

Unrealized gains (losses) on available-for-sale securities:
 
 
  
 
  
 
 
 
  
 
  
Unrealized gains for the period, net
9,558

 
(3,823
)
 
5,735

 
343

 
(137
)
 
206

Reclassification of realized gain on sale of available-for-sale securities included in net income
—

 
—

 
—

 
(1,754
)
 
701

 
(1,053
)
  
9,558

 
(3,823
)
 
5,735

 
(1,411
)
 
564

 
(847
)
Pension and other postretirement plans:
  
 
  
 
  
 
  
 
  
 
  
Amortization of net prior service cost included in net income
120

 
(48
)
 
72

 
104

 
(41
)
 
63

Amortization of net actuarial (gain) loss included in net income
(1,823
)
 
729

 
(1,094
)
 
290

 
(116
)
 
174

  
(1,703
)
 
681

 
(1,022
)
 
394

 
(157
)
 
237

Cash flow hedge:
 
 
  
 
  
 
  
 
  
 
  
Loss for the period
(124
)
 
25

 
(99
)
 
—

 
—

 
—

Other Comprehensive Income
$
21,399

 
$
(3,117
)
 
$
18,282

 
$
2,828

 
$
407

 
$
3,235
Summary of Changes in Accumulated Other Comprehensive (Loss) Income
The accumulated balances related to each component of other comprehensive income (loss) are as follows:
(in thousands, net of taxes)
Cumulative
Foreign
Currency
Translation
Adjustment
 
Unrealized Gain
on Available-for- Sale Securities
 
Unrealized Gain
on Pensions
and Other
Postretirement
Plans
 
Cash Flow
Hedge
 
Accumulated
Other
Comprehensive
Income
Balance as of December 31, 2016
$
(26,998
)
 
$
92,931

 
$
170,830

 
$
(277
)
 
$
236,486

Other comprehensive income (loss) before reclassifications
13,668

 
5,735

 
—

 
(124
)
 
19,279

Net amount reclassified from accumulated other comprehensive income (loss)
—

 
—

 
(1,022
)
 
25

 
(997
)
Other comprehensive income (loss), net of tax
13,668

 
5,735

 
(1,022
)
 
(99
)
 
18,282

Balance as of March 31, 2017
$
(13,330
)
 
$
98,666

 
$
169,808

 
$
(376
)
 
$
254,768
Summary of Amounts and Line Items of reclassifications Out of Accumulated Other Comprehensive (Loss) Income
The amounts and line items of reclassifications out of Accumulated Other Comprehensive Income (Loss) are as follows:
  
Three Months Ended 
 March 31
 
Affected Line Item in the Condensed Consolidated Statement of Operations
  
 
(in thousands)
2017
 
2016
 
Unrealized Gains on Available-for-sale Securities:
  
 
  
 
  
Realized gain for the period
$
—

 
$
(1,754
)
 
Other income, net
  
—

 
701

 
Provision for Income Taxes
  
—

 
(1,053
)
 
Net of Tax
Pension and Other Postretirement Plans:
 
 
  
 
  
Amortization of net prior service cost
120

 
104

 
(1)
Amortization of net actuarial (gain) loss
(1,823
)
 
290

 
(1)
  
(1,703
)
 
394

 
Before tax
  
681

 
(157
)
 
Provision for Income Taxes
  
(1,022
)
 
237

 
Net of Tax
Cash Flow Hedge
 
 
  
 
  
  
31

 
—

 
Interest expense
  
(6
)
 
—

 
Provision for Income Taxes
  
25

 
—

 
Net of Tax
Total reclassification for the period
$
(997
)
 
$
(816
)
 
Net of Tax
____________
(1)
These accumulated other comprehensive income components are included in the computation of net periodic pension and postretirement plan cost (see Note 8).