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Fair Value Measurements - Fair Value of Other Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Carrying Amount |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Borrowings under revolving credit facility | $ 53,402 | $ 27,950
Fair Value |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Borrowings under revolving credit facility | $ 53,402 | $ 27,950

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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. + References No definition available. + Details
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- Definition Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time. + References No definition available. + Details
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