Revenues Revenues - Schedule of Contract Liabilities (Details) $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2018
USD ($)
| |
| Contract with Customer, Liability [Roll Forward] | |
| Balance, January 1, 2018 | $ 15,000 |
| Deduction for recognition of revenue | (15,000) |
| Increase for deferral of shortfall payments | 4,246 |
| Increase for deferral of customer prepayments | 58 |
| Balance, December 31, 2018 | $ 4,304 |
| X | ||||||||||
- Definition Contract With Customer, Liability, Period Increase From Deferred Payments, Shortfall No definition available.
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- Definition Contract with Customer, Liability, Period Increase From Deferred Payments, Prepayment No definition available.
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| X | ||||||||||
- Definition Contract with Customer, Liability No definition available.
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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