Summary of Significant Accounting Policies (Accounts Receivable and Allowance for Doubtful Receivables) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Accounting Policies [Abstract] | |||
| Number of days in allowance used n the calculation (greater than) | 120 days | ||
| Allowance for Doubtful Accounts Receivable [Roll Forward] | |||
| Balance at beginning of year | $ 0 | $ 1,100 | $ 244 |
| Charged to costs and expenses | 8,741 | 0 | 1,100 |
| Charged to other accounts | 0 | 0 | 0 |
| Write-offs net of recoveries | 1,186 | 1,100 | 244 |
| Balance at end of year | $ 7,555 | $ 0 | $ 1,100 |
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- Definition Accounts Receivable, Threshold Period For Allowance For Doubtful Accounts No definition available.
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- Definition Amount of allowance for doubtful accounts increase which was not charged to operations. Specifics of where it was charged is discussed in narrative to the footnote. No definition available.
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- References No definition available.
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- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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