Organization and Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands |
Dec. 31, 2018 |
Oct. 01, 2018 |
Sep. 30, 2018 |
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| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Retained earnings | $ 664,332 | $ 666,210 | $ 633,281 |
| Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 | |||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Retained earnings | $ (33,349) | $ 32,929 | $ 32,900 |
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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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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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