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Retirement Plans And Postretirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2018
Retirement Benefits, Description [Abstract]  
Components Of Consolidated Net Pension Costs Retirement Plans
The components of our consolidated net pension costs are set forth in the following table:
 
For the Year Ended December 31,
 
2018
 
2017
 
2016
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
 
 
 
 
(Dollars in thousands)
Service cost
$
1,315

 
$
674

 
$
1,305

 
$
710

 
$
1,325

 
$
698

Interest cost
4,709

 
253

 
5,352

 
199

 
5,744

 
243

Expected return on assets
(5,679
)
 
(330
)
 
(5,268
)
 
(299
)
 
(4,940
)
 
(298
)
Mark-to-market loss (gain)
2,473

 
503

 
(4,140
)
 
(53
)
 
(2,322
)
 
(220
)
Pension costs
$
2,818

 
$
1,100

 
$
(2,751
)
 
$
557

 
$
(193
)
 
$
423
Reconciliation Of Pension Plans' Benefit Obligations, Fair Value Of Assets Retirement Plans
The reconciliation of the beginning and ending balances of our pension plans’ benefit obligations, fair value of assets, and funded status at December 31, 2018 and 2017 are:
 
As of
December 31, 2018
 
As of
December 31, 2017
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
(Dollars in thousands)
Changes in Benefit Obligation:
 
 
 
 
 
 
 
Net Benefit Obligation at beginning of period
$
139,746

 
$
20,407

 
$
140,230

 
$
18,237

Service cost
1,315

 
674

 
1,305

 
710

Interest cost
4,709

 
253

 
5,352

 
199

Participant contributions
—

 
392

 
—

 
252

Foreign currency exchange changes
—

 
(339
)
 
—

 
1,069

Actuarial (gain) loss
(8,297
)
 
711

 
3,212

 
63

Benefits paid
(10,488
)
 
234

 
(10,353
)
 
(123
)
Net benefit obligation at end of period
$
126,985

 
$
22,332

 
$
139,746

 
$
20,407

Changes in Plan Assets:
 
 
 
 
 
 
 
Fair value of plan assets at beginning of period
$
109,845

 
$
13,618

 
$
100,905

 
$
11,871

Actual return on plan assets
(5,091
)
 
538

 
12,620

 
415

Foreign currency exchange rate changes


 
(154
)
 
—

 
545

Employer contributions
5,579

 
726

 
6,673

 
658

Participant contributions


 
392

 
—

 
252

Benefits paid
(10,488
)
 
234

 
(10,353
)
 
(123
)
Fair value of plan assets at end of period
$
99,845

 
$
15,354

 
$
109,845

 
$
13,618

Funded status (underfunded):
$
(27,140
)
 
$
(6,978
)
 
$
(29,901
)
 
$
(6,789
)
Amounts recognized in accumulated
  other comprehensive loss:
 
 
 
 
 
 
 
Prior service credit
$
—

 
$
—

 
$
—

 
$
—

Amounts recognized in the statement
  of financial position:
 
 
 
 
 
 
 
Non-current assets


 
$
147

 
$
—

 
$
—

Current liabilities
(430
)

(117
)
 
(433
)
—

(146
)
Non-current liabilities
(26,710
)

(7,008
)
 
(29,468
)
—

(6,643
)
Net amount recognized
$
(27,140
)
 
$
(6,978
)
 
$
(29,901
)
 
$
(6,789
)
Fair Asset Values Of Plan Assets
The fair value of other plan assets by category is summarized below (dollars in thousands):
 
As of December 31, 2018
Level 1
 
Level 2
 
Level 3
 
Total
U.S. Plan Assets
 
 
 
 
 
 
 
Cash and cash equivalents
$
1,978

 
$
—

 
$
—

 
$
1,978

International Plan Assets
 
 
 
 
 
 
 
Foreign government bonds
$
—

 
$
958

 
$
—

 
$
958

Fixed insurance contracts
—

 
—

 
14,396

 
14,396

Total assets in the fair value hierarchy
$
—

 
$
958

 
$
14,396

 
$
15,354

Investments measured at net asset value
 
 
 
 
 
 
$
97,867

Total
$
1,978

 
$
958

 
$
14,396

 
$
115,199

 
 
 
 
 
 
 
 
 
As of December 31, 2017
 
Level 1

 
Level 2

 
Level 3

 
Total

U.S. Plan Assets
 
 
 
 
 
 
 
Cash and cash equivalents
$
2,094

 
$
—

 
$
—

 
$
2,094

International Plan Assets
 
 
 
 
 
 
 
Foreign government bonds
$
—

 
$
831

 
$
—

 
$
831

Fixed insurance contracts
—

 
—

 
12,787

 
12,787

Total assets in the fair value hierarchy
$
—

 
$
831

 
$
12,787

 
$
13,618

Investments measured at net asset value
 
 
 
 
 
 
$
107,751

Total
$
2,094

 
$
831

 
$
12,787

 
$
123,463

 
 
 
 
 
 
 
 
Fair Value Hierarchy, Assets At Fair Value
The following table presents the changes for those financial instruments classified within Level 3 of the valuation hierarchy for international plan pension assets for the years ended December 31, 2017 and 2018 (dollars in thousands):
 
Fixed Insurance
Contracts
Balance at December 31, 2016
$
11,142

   Gain / contributions / currency impact
1,651

   Distributions
(6
)
Balance at December 31, 2017
12,787

   Gain / contributions / currency impact
1,619

   Distributions
(10
)
Balance at December 31, 2018
$
14,396
Assumptions Used To Determine Net Pension Costs And Projected Benefit Obligations
Assumptions used to determine net pension costs and projected benefit obligations are:
Pension Benefit Obligations Key Assumptions
As of December 31,
 
2018
 
2017
Weighted average assumptions to determine benefit obligations:
 
 
 
Discount rate
3.71
%
 
3.20
%
Rate of compensation increase
1.74
%
 
1.57
%
 
Pension Cost Key Assumptions
 
 
 
Weighted average assumptions to determine net cost:
 
 
 
Discount rate
3.20
%
 
3.61
%
Expected return on plan assets
4.94
%
 
4.95
%
Rate of compensation increase
1.57
%
 
1.57
%
Assumptions used to determine net postretirement benefit costs and postretirement projected benefit obligation are set forth in the following table:
Postretirement Benefit Obligations
 
 
2018
 
2017
Weighted average assumptions to determine benefit obligations:
 
 
 
Discount rate
5.57
%
 
5.07
%
Health care cost trend on covered charges:
 
 
 
Initial
6.53
%
 
6.86
%
Ultimate
6.05
%
 
6.23
%
Years to ultimate
8

 
8

Postretirement Benefit Costs
 
 
 
 
2018
 
2017
Weighted average assumptions to determine net cost:
 
 
 
Discount rate
5.07
%
 
4.80
%
Health care cost trend on covered charges:
 
 
 
Initial
6.86
%
 
6.80
%
Ultimate
6.23
%
 
5.96
%
Years to ultimate
7

 
7
Retirement Plan Weighted Average Asset Allocations
The following table presents our retirement plan weighted average asset allocations at December 31, 2018, by asset category:
 
Percentage of Plan Assets
as of December 31, 2018
 
US
 
Foreign
Equity securities and return seeking assets
20
%
 
—
%
Fixed income, debt securities, or cash
80
%
 
100
%
Total
100
%
 
100
%
Pension Plans With An Accumulated Benefit Obligation In Excess Of Plan Assets
Information for our pension plans with an accumulated benefit obligation in excess of plan assets at December 31, 2017 and 2018 follows:
 
2018
 
2017
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
(Dollars in thousands)
Accumulated benefit obligation
$
126,985

 
$
20,601

 
$
139,746

 
$
18,843

Fair value of plan assets
99,845

 
14,396

 
109,845

 
13,618
Pension Plans With Projected Benefit Obligation In Excess Of Plan Assets
Information for our pension plans with a projected benefit obligation in excess of plan assets at December 31, 2017 and 2018 follows:
 
2018
 
2017
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
(Dollars in thousands)
Projected benefit obligation
$
126,985

 
$
21,520

 
$
139,746

 
$
20,407

Fair value of plan assets
99,845

 
14,396

 
109,845

 
13,618
Projected Future Pension Plan Cash Flow By Year
Following is our projected future pension plan cash flow by year:
 
U.S.
 
Foreign
 
(Dollars in thousands)
Expected contributions in 2019:
 
 
 
Expected employer contributions
$
684

 
$
744

Expected employee contributions
—

 
—

Estimated future benefit payments reflecting expected future service for the years ending December 31:
 
 
 
2019
9,240

 
858

2020
9,221

 
755

2021
9,221

 
824

2022
9,182

 
824

2023
9,136

 
955

2024-2028
43,993

 
8,223
Recognized In Other Comprehensive Income Postretirement Benefit Plans
The components of our consolidated net postretirement costs are set forth in the following table:
 
For the Year Ended December 31,
 
2018
 
2017
 
2016
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
(Dollars in thousands)
Service cost
$
—

 
$
1

 
$
—

 
$
2

 
$
—

 
$
4

Interest cost
264

 
700

 
333

 
653

 
360

 
764

Plan amendment / curtailment
—

 
—

 
—

 
—

 
—

 
(993
)
Mark-to-market (gain) loss
(1,028
)
 
47

 
(1,257
)
 
742

 
(191
)
 
(225
)
Post-employment benefits (benefit)
   cost
$
(764
)
 
$
748

 
$
(924
)
 
$
1,397

 
$
169

 
$
(450
)
Fair Value Of Assets Of, And The Funded Status Of, Postretirement Plans
The reconciliation of beginning and ending balances of benefit obligations under, fair value of assets of, and the funded status of, our postretirement plans is set forth in the following table:
Postretirement Benefits
As of
December 31, 2018
 
As of
December 31, 2017
 
 
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
(Dollars in thousands)
Changes in Benefit Obligation:
 
 
 
 
 
 
 
Net benefit obligation at beginning of period
$
8,461

 
$
12,172

 
$
10,175

 
$
10,700

Service cost
—

 
1

 
—

 
2

Interest cost
264

 
700

 
333

 
653

Foreign currency exchange rates
—

 
(1,333
)
 
—

 
931

Actuarial (gain) loss

(1,028
)
 
47

 
(1,257
)
 
742

Gross benefits paid
(532
)
 
(926
)
 
(790
)
 
(856
)
Plan amendment
—

 
—

 
—

 
—

Net benefit obligation at end of period
$
7,165

 
$
10,661

 
$
8,461

 
$
12,172

Changes in Plan Assets:
 
 
 
 
 
 
 
Fair value of plan assets
   at beginning of period
$
—

 
$
—

 
$
—

 
$
—

Employer contributions
532

 
926

 
790

 
856

Gross benefits paid
(532
)
 
(926
)
 
(790
)
 
(856
)
Fair value of plan assets at end of period
$
—

 
$
—

 
$
—

 
$
—

Funded status:
$
(7,165
)
 
$
(10,661
)
 
$
(8,461
)
 
$
(12,172
)
Amounts recognized in accumulated
   other comprehensive loss:
 
 
 
 
 
 
 
Prior service credit
$
—

 
$
—

 
$
—

 
$
—

Amounts recognized in the statement of
   financial position:
 
 
 
 
 
 
 
Current liabilities
$
(783
)
 
$
(851
)
 
$
(855
)
 
$
(912
)
Non-current liabilities
(6,382
)
 
(9,810
)
 
(7,606
)
 
(11,260
)
Net amount recognized
$
(7,165
)
 
$
(10,661
)
 
$
(8,461
)
 
$
(12,172
)
One-Percentage Point Change In Assumed Health Care Cost Trend Rates
A one-percentage point change in assumed health care cost trend rates would have the following effects at December 31, 2018:
 
One Percentage
Point Increase
 
One Percentage
Point Decrease
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
(Dollars in thousands)
Effect on total service cost
   and interest cost components
$
1

 
$
32

 
$
(1
)
 
$
(66
)
Effect on benefit obligations
$
14

 
$
506

 
$
(14
)
 
$
(442
)
Projected Future Postretirement Cash Flow By Year
The following table represents projected future postretirement cash flow by year:
 
U.S.
 
Foreign
 
(Dollars in thousands)
Expected contributions in 2019:
 
 
 
Expected employer contributions
$
783

 
$
851

Expected employee contributions
—

 
—

Estimated future benefit payments reflecting expected
   future service for the years ending December 31:
 
 
 
2019
783

 
851

2020
724

 
866

2021
663

 
891

2022
607

 
904

2023
554

 
899

2024-2025
2,174

 
4,769