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Accumulated Other Comprehensive Loss (AOCL) (Changes) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Balances, beginning of period | $ 44,580 | $ 52,972 | $ 286,096 | $ 101,842
Other comprehensive income (loss) before reclassifications |  |  | 4,822 | 1,098
Reclassifications into earnings |  |  | 21,749 | 21,411
Other comprehensive income (loss), net of tax | 22,690 | (18,774) | 26,571 | 22,509
Balances, end of period | 79,125 | 25,412 | 79,125 | 25,412
Cash flow hedges |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Balances, beginning of period |  |  | 337 | 191
Other comprehensive income (loss) before reclassifications |  |  | (2,455) | 135
Reclassifications into earnings |  |  | 53 | (57)
Other comprehensive income (loss), net of tax |  |  | (2,402) | 78
Balances, end of period | (2,065) | 269 | (2,065) | 269
Available for sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Balances, beginning of period |  |  | 2,849 | (3,061)
Other comprehensive income (loss) before reclassifications |  |  | 2,237 | 7,547
Reclassifications into earnings |  |  | (7,713) | (31)
Other comprehensive income (loss), net of tax |  |  | (5,476) | 7,516
Balances, end of period | (2,627) | 4,455 | (2,627) | 4,455
Pension and postretirement benefit plans |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Balances, beginning of period |  |  | (819,018) | (846,461)
Other comprehensive income (loss) before reclassifications |  |  | 0 | 0
Reclassifications into earnings |  |  | 29,409 | 21,499
Other comprehensive income (loss), net of tax |  |  | 29,409 | 21,499
Balances, end of period | (789,609) | (824,962) | (789,609) | (824,962)
Foreign currency adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Balances, beginning of period |  |  | (24,311) | (99,630)
Other comprehensive income (loss) before reclassifications |  |  | 5,040 | (6,584)
Reclassifications into earnings |  |  | 0 | 0
Other comprehensive income (loss), net of tax |  |  | 5,040 | (6,584)
Balances, end of period | (19,271) | (106,214) | (19,271) | (106,214)
Total |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Balances, beginning of period | (836,262) | (907,678) | (840,143) | (948,961)
Other comprehensive income (loss), net of tax | 22,690 | (18,774) | 26,571 | 22,509
Balances, end of period | $ (813,572) | $ (926,452) | $ (813,572) | $ (926,452)

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