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Segment and Geographic Data, Operating Margin Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating margin reconciliation [Abstract] |  |  |
Segment Operating Income | $ 455,942 | $ 543,696 | $ 755,888
Restructuring and Severance Costs | (743) | (24,139) | 0
Impact of coronavirus outbreak | 1,451 | 0 | 0
Consolidated Operating Income (Loss) | 209,710 | 262,430 | 485,120
Unallocated Other Income (Expense) | (51,382) | (36,132) | (68,344)
Consolidated Income Before Taxes | 158,328 | 226,298 | 416,776
Unallocated Amount to Segment [Member] |  |  |
Operating margin reconciliation [Abstract] |  |  |
Segment Operating Income | $ (246,940) | $ (257,127) | $ (270,768)

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