Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands |
1 Months Ended | 12 Months Ended |
|---|---|---|
Aug. 31, 2014 |
Dec. 31, 2016 |
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| Minimum | ||
| Goodwill [Line Items] | ||
| Intangible assets amortization period | 1 year | |
| Maximum | ||
| Goodwill [Line Items] | ||
| Intangible assets amortization period | 15 years | |
| EEX | ||
| Goodwill [Line Items] | ||
| Payments to acquire businesses | $ 9,054 | |
| Security deposit with third-party escrow agent | $ 834 |
| X | ||||||||||
- Definition Business Acquisition, Cost of Acquired Entity, Security Deposit in Escrow No definition available.
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- 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.
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- 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 The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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