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Error Correction (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  |  | $ 11,799,000 | $ 7,862,000 | $ 6,313,000
Employee profit sharing bonus plan |  |  |  |  |  |  |  | $ 7,400,000 | 6,200,000 | 8,400,000
Corrections | Cost of Sales |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based compensation | $ 100,000 | $ 100,000 | $ 400,000 | $ 100,000 | $ 100,000 | $ 100,000 | $ 200,000 |  | 0 | 300,000
Corrections | Selling, General and Administrative Expenses |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based compensation | 700,000 | 600,000 | 3,000,000.0 | (600,000) | (600,000) | 100,000 | 1,600,000 |  | 500,000 | 100,000
Employee profit sharing bonus plan | $ 100,000 | $ 100,000 | $ 400,000 | $ 100,000 | $ 100,000 | $ 100,000 | $ 200,000 |  | $ 100,000 | $ 100,000

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