Summary of Significant Accounting Policies - Amortizable Intangible Assets (Details) - USD ($) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
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| Finite-Lived Intangible Assets [Line Items] | ||
| Goodwill, impairment loss | $ 0 | $ 0 |
| Impairment of intangible assets | $ 0 | $ 0 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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