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Supplemental Equity Information - Reclassifications out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total reclassifications, before tax | $ 2,473 | $ 24,225 | $ 11,325 | $ 38,370
Income tax effect | (622) | (850) | (2,880) | (2,543)
Total reclassifications, net of tax | 1,851 | 23,375 | 8,445 | 35,827
Amortization of prior service (credit) cost |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total reclassifications, before tax | (101) | 16 | (302) | 48
Amortization of actuarial loss |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total reclassifications, before tax | 1,376 | 2,185 | 4,129 | 6,555
Reclassification of CareerBuilder foreign currency translation |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total reclassifications, before tax | 0 | 22,024 | 0 | 22,024
Total reclassifications, net of tax | 0 | 22,024 | 0 | 22,024
Reclassification of available for sale investment |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total reclassifications, before tax | 0 | 0 | 0 | 9,743
Pension payment timing related charges |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total reclassifications, before tax | $ 1,198 | $ 0 | $ 7,498 | $ 0

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