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Investments (Narrative) (Details) 1 - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Mar. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2008 | Aug. 31, 2007
Unrealized gain (loss) on investment under fair value method |  |  | $ 11,900 | $ 24,800 |  |  |  |
Cost-method investment, OTTI | $ 186 | $ 0 | 186 |  |  |  |  |
Gain (Loss) on Disposition of Assets |  |  | $ (86) | 412 |  |  |  |
kaleo |  |  |  |  |  |  |  |
Total cash invested in private company |  |  |  |  |  |  | $ 7,500 |
Ownership interest percentage |  |  | 20.00% |  |  |  |  |
Carrying value | 65,900 |  | $ 65,900 |  | $ 68,000 | $ 54,000 |  |
Unrealized gain (loss) on investment under fair value method | (2,100) | $ 0 | 11,900 | 24,800 |  |  |  |
Unrealized Gain Loss On Investment Under Fair Value Method After Taxes | $ (1,600) |  | $ 9,300 | 18,200 |  |  |  |
Basis point decrease of weighted average cost of capital assumption |  |  |  |  |  |  |  |
Basis point increase of weighted average cost of capital assumption |  |  |  |  |  |  |  |
Alleghany and Bath County, Virginia [Member] |  |  |  |  |  |  |  |
Cost-method investment, OTTI |  |  |  | $ 0 |  |  |  |
Cost Method Investments | $ 1,400 |  | $ 1,400 |  |  | 1,600 |  |
Harbinger Capital Partners Special Situations Fund L P [Member] |  |  |  |  |  |  |  |
Cost-method investment, OTTI | 200 |  | 300 |  |  |  |  |
Cost Method Investments | $ 1,400 |  | $ 1,400 |  |  | $ 1,700 |  |

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