v3.20.1

Employee Benefit Plans (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2020
Retirement Benefits [Abstract] |
Schedule of Consolidated Net Periodic Benefit Costs | Net periodic benefit expense for the three months ended March 31, 2019 and 2020 was as follows (in thousands):
| Three Months Ended |  | Three Months Ended
| March 31, 2019 |  | March 31, 2020
| Pension Benefits |  | Other Postretirement Benefits |  | Pension Benefits |  | Other Postretirement Benefits
Components of net periodic benefit costs: |  |  |  |  |  |  |
Service cost | $ | 6,527 |  |  | $ | 54 |  |  | $ | 7,203 |  |  | $ | 62 |
Interest cost | 3,000 |  |  | 119 |  |  | 2,802 |  |  | 112 |
Expected return on plan assets | (2,374 | ) |  | — |  |  | (2,886 | ) |  | — |
Amortization of prior service credit | (45 | ) |  | — |  |  | (45 | ) |  | — |
Amortization of actuarial loss | 1,277 |  |  | 71 |  |  | 1,412 |  |  | 119 |
Settlement cost | — |  |  | — |  |  | 969 |  |  | — |
Settlement gain on disposition of assets | — |  |  | — |  |  | (1,342 | ) |  | — |
Net periodic benefit cost | $ | 8,385 |  |  | $ | 244 |  |  | $ | 8,113 |  |  | $ | 293 |
The service component of our net periodic benefit costs is presented in operating expense and G&A expense, and the non-service components are presented in other (income) expense in our consolidated statements of income.
Schedule of Amounts Recognized in Other Comprehensive Loss | The changes in accumulated other comprehensive loss (“AOCL”) related to employee benefit plan assets and benefit obligations for the three months ended March 31, 2019 and 2020 were as follows (in thousands):
|  | Three Months Ended |  | Three Months Ended
|  | March 31, 2019 |  | March 31, 2020
Gains (Losses) Included in AOCL |  | Pension Benefits |  | Other Postretirement Benefits |  | Pension Benefits |  | Other Postretirement Benefits
Beginning balance |  | $ | (88,602 | ) |  | $ | (5,409 | ) |  | $ | (104,739 | ) |  | $ | (8,378 | )
Net actuarial loss |  | — |  |  | — |  |  | (747 | ) |  | — |
Curtailment gain |  | — |  |  | — |  |  | 1,703 |  |  | — |
Recognition of prior service credit amortization in income |  | (45 | ) |  | — |  |  | (45 | ) |  | — |
Recognition of actuarial loss amortization in income |  | 1,277 |  |  | 71 |  |  | 1,412 |  |  | 119 |
Recognition of settlement cost in income |  | — |  |  | — |  |  | 969 |  |  | — |
Ending balance |  | $ | (87,370 | ) |  | $ | (5,338 | ) |  | $ | (101,447 | ) |  | $ | (8,259 | )

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration