Intangible Assets and Goodwill (Narrative) (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | ||||
| Goodwill and intangible asset impairment | $ 0 | $ 0 | $ 0 | $ 0 |
| Finite-lived intangible asset, weighted average useful life | 12 years 10 months 3 days | |||
| X | ||||||||||
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
|
| X | ||||||||||
- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. No definition available.
|
| X | ||||||||||
- References No definition available.
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