| Intangible Assets (Tables) | 3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mar. 31, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Intangible Assets Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Finite-lived Intangible Assets Amortization Expense | The following table reflects the amortization of the purchased intangible assets as of March 31, 2018: 
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| X | ||||||||||
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- Definition Tabular disclosure of amortization expense of assets, excluding financial assets, that lack physical substance, having a limited useful life. No definition available. 
 | 
| X | ||||||||||
| 
- References No definition available. 
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