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Consolidated Statements of Cash Flows Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Supplemental Cash Flow Information [Abstract] |  |  |
Interest | $ 46,186 | $ 33,952 | $ 57,269
Income taxes | 196,193 | 373,900 | 276,789
Supplemental schedule of non-cash investing and financing activities: |  |  |
Additions to property, plant and equipment | (4,672) | 30,643 | 0
Fair value of net assets acquired in acquisition | 831,760 | 369,956 | 0
Liabilities assumed in acquisition | (257,515) | (119,157) | 0
Noncash investing and financing activities, total | $ 574,245 | $ 250,799 | $ 0

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