| Consolidated Statement Of Cash Flows |
Changes in the components of operating assets and liabilities are as follows (in thousands): | | | | | | | | | | | | | | | | Year Ended December 31, | | | 2017 | | 2018 | | 2019 | Trade accounts receivable and other accounts receivable | | $ | (25,639 | ) | | $ | 24,169 |
| | $ | (20,156 | ) | Inventory | | (47,967 | ) | | (3,390 | ) | | 1,336 |
| Accounts payable | | 8,954 |
| | 21,146 |
| | (1,237 | ) | Accrued payroll and benefits | | 10,596 |
| | 14,015 |
| | 4,931 |
| Accrued interest payable | | 5,014 |
| | (7,399 | ) | | 1,018 |
| Accrued taxes other than income | | 1,177 |
| | 1,750 |
| | 12,914 |
| Deferred revenue | | 15,904 |
| | 5,191 |
| | (11,431 | ) | Accrued product liabilities | | 44,559 |
| | (20,677 | ) | | 15,306 |
| Other current and noncurrent assets and liabilities | | 3,097 |
| | (12,559 | ) | | 5,313 |
| Total | | $ | 15,695 |
| | $ | 22,246 |
| | $ | 7,994 |
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