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Commitments and Contingencies - Narratives (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 16, 2018 case | Dec. 31, 2018 USD ($) claim | Dec. 31, 2018 USD ($) claim | Dec. 31, 2017 USD ($)
Loss contingency |  |  |  |
Accrued liability for the outcomes of non-income based tax audits |  | $ 4,500 | $ 4,500 | $ 1,700
Indemnification liability |  | $ 2,600 | $ 2,600 | 1,600
Litigation and Claims |  |  |  |
Number of cases appealed | claim |  | 3 | 3 |
Loss Contingencies |  |  |  |
Benefit from tax audit |  | $ 11,300 |  |
Tax refund receivable |  | 15,262 | $ 15,262 | $ 0
Number of cases settled | 2 |  | 3 |
Similar Judge |  |  |  |
Loss Contingencies |  |  |  |
Number of cases settled | claim |  |  | 2 |
Accrued liabilities |  |  |  |
Loss Contingencies |  |  |  |
Accrued income taxes |  | 4,000 | $ 4,000 |
Cost of sales excluding depreciation and amortization |  |  |  |
Loss Contingencies |  |  |  |
Benefit from tax audit |  | 1,800 |  |
SG&A |  |  |  |
Loss Contingencies |  |  |  |
Benefit from tax audit |  | 8,900 |  |
Interest expense |  |  |  |
Loss Contingencies |  |  |  |
Benefit from tax audit |  | 100 |  |
Other income |  |  |  |
Loss Contingencies |  |  |  |
Benefit from tax audit |  | $ 500 |  |

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