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v3.20.2

Components of Accumulated Other Comprehensive Loss (Changes in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance at beginning of period | $ (1,149,614) | $ (1,278,386) | $ (1,226,831) | $ (1,314,779)
Effect of pension settlement |  |  | (31,811) |
Balance at end of period | (1,125,476) | (1,246,050) | (1,125,476) | (1,246,050)
Pension Plans [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance at beginning of period | 101,524 | 126,678 | 117,028 | 129,253
Net loss arising during the period |  |  | 19,402 |
Effect of pension settlement |  |  | (31,811) |
Amounts reclassified from AOCL to earnings | (2,654) | (2,497) | (5,749) | (5,072)
Balance at end of period | 98,870 | 124,181 | 98,870 | 124,181
Other Post Retirement Benefit Plans [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance at beginning of period | 10,257 | 27 | 10,331 | (1,382)
Amounts reclassified from AOCL to earnings | (73) | 1,489 | (147) | 2,898
Balance at end of period | 10,184 | 1,516 | 10,184 | 1,516
Cash Flow Hedges [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance at beginning of period | 58,525 | 10,073 | 20,000 | 1,560
Net loss arising during the period | 3,669 | 10,598 | 43,032 | 19,192
Amounts reclassified from AOCL to earnings | (1,822) | (181) | (2,660) | (262)
Balance at end of period | 60,372 | 20,490 | 60,372 | 20,490
Accumulated Other Comprehensive Loss [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Balance at beginning of period | 170,306 | 136,778 | 147,359 | 129,431
Balance at end of period | $ 169,426 | $ 146,187 | $ 169,426 | $ 146,187

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