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Components of Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2022
Equity [Abstract] |
Changes in Accumulated Other Comprehensive Income (Loss) | The following table details changes in amounts included in our Accumulated Other Comprehensive Income (Loss) (AOCI) by component on our Condensed Consolidated Balance Sheets, net of tax:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
(in thousands) |  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Pension Plans |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | 41,274 |  |  | $ | 73,592 |  |  | $ | 49,579 |  |  | $ | 79,025 |
Net loss arising during the period |  |  | — |  |  |  | — |  |  |  | 4,587 |  |  |  | — |
Effect of pension settlement |  |  | — |  |  |  | — |  |  |  | (10,553 | ) |  |  | — |
Amounts reclassified from AOCI to earnings |  |  | (869 | ) |  |  | (2,664 | ) |  |  | (3,208 | ) |  |  | (8,097 | )
Balance at end of period |  |  | 40,405 |  |  |  | 70,928 |  |  |  | 40,405 |  |  |  | 70,928 |
Other Postretirement Benefit Plans |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  |  | 1,700 |  |  |  | 14,418 |  |  |  | 1,790 |  |  |  | 14,783 |
Amounts reclassified from AOCI to earnings |  |  | (45 | ) |  |  | (182 | ) |  |  | (135 | ) |  |  | (547 | )
Balance at end of period |  |  | 1,655 |  |  |  | 14,236 |  |  |  | 1,655 |  |  |  | 14,236 |
Cash Flow Hedges |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  |  | (93,936 | ) |  |  | (5,763 | ) |  |  | (8,131 | ) |  |  | 27,181 |
Amounts arising during the period |  |  | (32,895 | ) |  |  | (4,310 | ) |  |  | (115,256 | ) |  |  | (32,741 | )
Amounts reclassified from AOCI to earnings |  |  | 170 |  |  |  | (2,326 | ) |  |  | (3,274 | ) |  |  | (6,839 | )
Balance at end of period |  |  | (126,661 | ) |  |  | (12,399 | ) |  |  | (126,661 | ) |  |  | (12,399 | )
Accumulated other comprehensive (income) loss, end of period |  | $ | (84,601 | ) |  | $ | 72,765 |  |  | $ | (84,601 | ) |  | $ | 72,765 |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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