Fair Value Measurements and Derivative Instrument (Fair Value Measurement Using Level 3 Inputs) (Details) - Derivative Stock Appreciation Rights - USD ($) $ in Thousands |
9 Months Ended | |
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Sep. 30, 2017 |
Sep. 30, 2016 |
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| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Fair value of stock appreciation rights, beginning balance | $ 29,700 | $ 32,820 |
| Fair value of stock appreciation rights, ending balance | 83,670 | 16,980 |
| Other Income (Expense) | ||
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Fair value adjustment at end of period, included in Other Income (Expense) | $ 53,970 | $ (15,840) |
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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