Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Dec. 31, 2016 |
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| Changes in the Allowance for Doubtful Accounts [Roll Forward] | |||
| Allowance for doubtful accounts, beginning of period | $ 3,315 | $ 7,836 | |
| Charges to costs and expenses | 483 | 68 | |
| Account write-offs and other | (361) | (4,088) | |
| Allowance for doubtful accounts, end of period | $ 3,437 | $ 3,816 | $ 7,836 |
| Minimum | |||
| Changes in the Allowance for Doubtful Accounts [Roll Forward] | |||
| Accounts receivable retainage | 5.00% | ||
| Maximum | |||
| Changes in the Allowance for Doubtful Accounts [Roll Forward] | |||
| Accounts receivable retainage | 10.00% | ||
| Accounts receivable | |||
| Changes in the Allowance for Doubtful Accounts [Roll Forward] | |||
| Allowance for doubtful accounts receivable, period increase | $ 2,394 | ||
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- Definition Accounts Receivable Retainage No definition available.
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- Definition Allowance for Doubtful Accounts Receivable, Charge-offs and Other 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 Amount of increase (decrease) in the allowance for doubtful accounts. No definition available.
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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 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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