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Pensions and Other Post-retirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2020
Retirement Benefits [Abstract]  
Schedule Of Defined Benefit Pension Plans And Other Postretirement Benefits Plan Information pertaining to defined benefit pension plans and other post-retirement benefits plans is provided in the following tables:
Pension BenefitsOther Benefits
(In thousands)2020201920202019
Change in Benefit Obligations
Benefit obligations at January 1$603,551 $525,520 $28,151 $28,477 
Service cost12,094 10,342 396 354 
Interest cost14,905 18,803 716 996 
Participant contributions396 470 370 380 
Plan amendments(430)— — — 
Actuarial losses(a)
54,606 81,132 5,284 1,319 
Benefits paid(24,496)(24,452)(2,692)(3,375)
Curtailments(1,559)— — — 
Settlements(506)(7,265)— — 
Currency translation12,296 (999)— — 
Benefit obligations at December 31$670,857 $603,551 $32,225 $28,151 
Change in Plan Assets
Fair value of plan assets at January 1$515,858 $443,112 $— $— 
Actual return on plan assets87,769 98,210 — — 
Employer contributions5,596 5,537 2,322 2,995 
Participant contributions396 470 370 380 
Settlements(506)(7,265)— — 
Benefits paid(24,496)(24,452)(2,692)(3,375)
Administrative expenses paid(172)(297)— — 
Currency translation2,377 543 — — 
Fair value of plan assets at December 31$586,822 $515,858 $— $— 
Funded Status
Funded status at December 31$(84,035)$(87,693)$(32,225)$(28,151)
Unrecognized transition losses4 4 — — 
Unrecognized prior service credit1,717 1,572 (1,125)(1,519)
Unrecognized net actuarial losses169,028 183,733 16,686 12,547 
Net amount recognized$86,714 $97,616 $(16,664)$(17,123)
Amounts Recognized in the Balance Sheets
Noncurrent assets$97,545 $75,066 $— $— 
Current liabilities(6,600)(5,944)(2,849)(2,406)
Noncurrent liabilities(174,980)(156,815)(29,376)(25,745)
Net amount recognized$(84,035)$(87,693)$(32,225)$(28,151)
Amounts Recognized in Accumulated Other Comprehensive Loss
Net actuarial losses$169,028 $183,733 $16,686 $12,547 
Prior service cost (credit)1,717 1,572 (1,125)(1,519)
Unrecognized net initial obligation4 4 — — 
Total (before tax effects)$170,749 $185,309 $15,561 $11,028 
Accumulated Benefit Obligations for all Defined Benefit Plans$619,167 $558,183 $— $— 
Components Of Net Periodic Benefit (Credit) Cost
Pension BenefitsOther Benefits
(In thousands)202020192018202020192018
Components of Net Periodic Benefit Cost
Service cost$12,094 $10,342 $11,125 $396 $354 $369 
Interest cost14,905 18,803 17,214 716 996 793 
Expected return on plan assets(34,029)(38,644)(36,352)— — — 
Amortization of transition amounts— 2 1 — — — 
Amortization of prior service cost (credit)178 223 (21)(394)(405)(405)
Recognized net actuarial losses15,799 10,159 13,755 1,145 869 752 
Settlement/curtailment loss1,135 
(b)
2,497 
(c)
179 — — — 
Net periodic benefit cost(a)
$10,082 $3,382 $5,901 $1,863 $1,814 $1,509 
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block]
Information for pension plans with an accumulated benefit obligation in excess of plan assets:
Pension BenefitsOther Benefits
(In thousands)2020201920202019
Aggregate accumulated benefit obligations (ABO)$209,351 $185,747 $32,225 $28,151 
Aggregate fair value of plan assets40,294 35,882 — — 
Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets
Information for pension plans with a projected benefit obligation in excess of plan assets:
Pension Benefits
(In thousands)20202019
Aggregate projected benefit obligations (PBO)223,343 198,633 
Aggregate fair value of plan assets41,764 35,882 
Schedule Of Assumptions Used To Determine Benefit Obligations And Net Periodic Benefit Cost
Pension BenefitsOther Benefits
2020201920202019
Assumptions used to determine benefit obligations
Average discount rate2.28 %2.86 %2.21 %3.05 %
Rate of compensation increase2.93 %2.93 %3.00 %— %
Assumptions used to determine net periodic benefit cost
Average discount rate - Service cost3.08 %3.10 %2.42 %3.15 %
Average discount rate - Interest cost2.52 %2.52 %1.48 %2.61 %
Expected return on plan assets7.10 %7.09 %— — 
Rate of compensation increase2.93 %2.93 %3.00 %— %
Schedule Of Expected Return On Assets For Net Periodic Pension Cost
Pension Plan Assets at
December 31,
20202019
Equity securities49 %46 %
Fixed income securities25 30 
Pooled investment funds21 19 
Insurance contracts4 4 
Cash and cash equivalents1 1 
Total100 %100 %
Summary Of Pension Plan Assets Measured At Fair Value On A Recurring Basis By Fair Value Hierarchy The fair values at December 31, 2020, were as follows:
Fair Value
(In thousands)TotalNAVQuoted Prices
in Active
Markets for
Identical
Assets
(Level 1)		Significant
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Equity securities$283,516 $66,847 $216,669 $— $— 
Fixed income securities148,173 — 76,502 71,671 — 
Pooled investment funds123,119 123,119 — — — 
Insurance contracts24,396 — — — 24,396 
Cash and cash equivalents7,618 6,681 937 — — 
Total$586,822 $196,647 $294,108 $71,671 $24,396 
The fair values of the Company's pension plan assets at December 31, 2019, were as follows:
Fair Value
(In thousands)TotalNAVQuoted Prices
in Active
Markets for
Identical
Assets
(Level 1)		Significant
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Equity securities$235,491 $56,449 $179,042 $— $— 
Fixed income securities154,640 — 73,874 80,766 — 
Pooled investment funds97,373 97,373 — — — 
Insurance contracts21,502 — — — 21,502 
Cash and cash equivalents6,852 5,792 1,060 — — 
Total$515,858 $159,614 $253,976 $80,766 $21,502 
Schedule Of Reconciliation Of Level 3 Assets
The following table presents a reconciliation of Level 3 assets:
(In thousands)Insurance
Contracts
Balance January 1, 2019$17,033 
Net realized and unrealized losses5,602 
Net purchases, issuances and settlements(1,133)
Balance December 31, 201921,502 
Net realized and unrealized gains2,564 
Net purchases, issuances and settlements330 
Balance December 31, 2020$24,396 
Level 3 Assets Recognized in Accumulated Other Comprehensive Loss
The following table presents amounts related to Level 3 assets recognized in accumulated other comprehensive loss:
(In thousands)Insurance
Contracts
Net actuarial losses972 
Prior service cost1,406 
Total (before tax effects)$2,378