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v3.19.3.a.u2

Components of Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Changes in Accumulated Other Comprehensive Loss | The following tables detail the changes in our Accumulated Other Comprehensive Loss (AOCL) on our Consolidated Balance Sheets for the years ended December 31, 2019 and 2018, net of tax.
|  |  |  |  |  | Pension Plans |  |  | OPEB |  |  |  |  |
(in thousands) |  | Gains and losses on cash flow hedging |  |  | Actuarial Loss |  |  | Prior Service Cost |  |  | Actuarial Loss |  |  | Prior Service Credit |  |  | Total |
Balance, December 31, 2017 |  | $ | (705 | ) |  | $ | 100,165 |  |  | $ | 446 |  |  | $ | 7,491 |  |  | $ | (12,546 | ) |  | $ | 94,851 |
Net loss (gain) arising during the period |  |  | 3,062 |  |  |  | 17,268 |  |  |  | — |  |  |  | (1,554 | ) |  |  | — |  |  |  | 18,776 |
Amounts reclassified from AOCL to earnings |  |  | (647 | ) |  |  | (12,276 | ) |  |  | (137 | ) |  |  | (970 | ) |  |  | 6,569 |  |  |  | (7,461 | )
Amounts reclassified from AOCL to accumulated deficit1 |  |  | (150 | ) |  |  | 23,692 |  |  |  | 95 |  |  |  | 2,302 |  |  |  | (2,674 | ) |  |  | 23,265 |
Balance, December 31, 2018 |  |  | 1,560 |  |  |  | 128,849 |  |  |  | 404 |  |  |  | 7,269 |  |  |  | (8,651 | ) |  |  | 129,431 |
Net loss (gain) arising during the period |  |  | 19,824 |  |  |  | (2,081 | ) |  |  | — |  |  |  | 5,917 |  |  |  | — |  |  |  | 23,660 |
Amounts reclassified from AOCL to earnings |  |  | (1,384 | ) |  |  | (9,988 | ) |  |  | (156 | ) |  |  | (749 | ) |  |  | 6,545 |  |  |  | (5,732 | )
Balance, December 31, 2019 |  | $ | 20,000 |  |  | $ | 116,780 |  |  | $ | 248 |  |  | $ | 12,437 |  |  | $ | (2,106 | ) |  | $ | 147,359 |
1 | Reclassifications between AOCL and accumulated deficit during 2018 relate to certain tax effects of tax law changes on pension and other postretirement employee benefits and a cash flow hedge upon adoption of ASU 2018-02 during 2018.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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