Summary of Significant Accounting Policies - Derivative Financial Instruments (Details) - Accounting Standards Update 2017-12 - USD ($) $ in Thousands |
Sep. 30, 2018 |
Dec. 31, 2017 |
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| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Cumulative impact from the adoption of ASU | $ (54) | |
| Other expenses, net | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Cumulative impact from the adoption of ASU | $ 54 | |
| Retained Earnings | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Cumulative impact from the adoption of ASU | 432 | |
| Accumulated Other Comprehensive Loss | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Cumulative impact from the adoption of ASU | $ 54 | $ (486) |
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- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. 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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