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Other Income (Expense), Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Unrealized gain (loss) on investments under fair value method |  |  |  |  |  |  | $ 30,600 | $ 33,800 | $ 1,600
Other Nonoperating Income (Expense) |  |  |  |  |  |  | 30,459 | 51,713 | 2,381
Other income (expense), net |  |  |  |  |  |  | 45 | 796 | (89)
kaleo [Member] |  |  |  |  |  |  |  |  |
Unrealized Gain (Loss) on Investments - kaleo |  |  |  |  |  |  | 30,600 | 33,800 | 1,600
Unrealized gain (loss) on investments under fair value method | [1] |  |  |  |  |  | 30,600 | 33,800 | 1,600
Flexible Packaging Films [Member] |  |  |  |  |  |  |  |  |
Businesss Combination Settlement of Escrow Account |  |  | $ 11,900 |  |  |  | 0 | 11,900 | 0
Aluminum Extrusions [Member] |  |  |  |  |  |  |  |  |
Cast House Explosion pretax income/loss |  | $ 5,100 | $ 900 | $ 400 | $ 700 | $ (1,700) | 0 | 5,300 | 1,900
Alleghany and Bath County, Virginia [Member] |  |  |  |  |  |  |  |  |
Unrealized gain (loss) on investments under fair value method |  |  |  |  | $ 1,000 |  | $ (186) | $ 0 | $ (1,032)
[1] | See Notes 1, 3, 4 and 17 for more information on losses associated with plant shutdowns, asset impairments and restructurings, unusual items, gains or losses from sale of assets, gains or losses on an investment accounted for under the fair value method and other items.

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