| Income Taxes - Net Operating Loss, Interest and Tax Credit Carryovers (Details) $ in Thousands | 12 Months Ended | 
|---|---|
| Dec. 31, 2018  USD ($) | |
| Operating Loss Carryforwards [Line Items] | |
| Interest limitation carryover | $ 197,049 | 
| Internal Revenue Service (IRS) | |
| Operating Loss Carryforwards [Line Items] | |
| Net operating loss | 47,804 | 
| State and Local Jurisdiction | |
| Operating Loss Carryforwards [Line Items] | |
| Net operating loss | $ 117,835 | 
| State and Local Jurisdiction | Minimum | |
| Operating Loss Carryforwards [Line Items] | |
| Net operating loss, expiration year | Dec. 31, 2025 | 
| State and Local Jurisdiction | Maximum | |
| Operating Loss Carryforwards [Line Items] | |
| Net operating loss, expiration year | Dec. 31, 2036 | 
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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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 Operating loss interest limitation carryover. No definition available. 
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