| Income Taxes - Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | 
|---|---|---|
| Valuation Allowance [Line Items] | ||
| Deferred Tax Liabilities | $ (3,922) | $ (3,199) | 
| Net Deferred Tax Assets (Liabilities) | 13,614 | |
| Net Deferred Tax Assets (Liabilities) | (1,634) | |
| Other Noncurrent Assets [Member] | ||
| Valuation Allowance [Line Items] | ||
| Deferred Tax Assets | 17,536 | 3,999 | 
| Assets Held For Sale [Member] | ||
| Valuation Allowance [Line Items] | ||
| Deferred Tax Assets | 0 | 1,528 | 
| Deferred Tax Liabilities [Member] | ||
| Valuation Allowance [Line Items] | ||
| Deferred Tax Liabilities | (3,922) | (3,199) | 
| Liabilities Held For Sale [Member] | ||
| Valuation Allowance [Line Items] | ||
| Deferred Tax Liabilities | $ 0 | $ (906) | 
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. 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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