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Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2018
Supplemental Cash Flow Elements [Abstract] |
Components of Change in Other Assets and Liabilities, Net | The components of the change in other assets and liabilities, net, are as follows:
|  | Nine-Months Ended |
|  | September 30, |
|  | 2018 |  |  | 2017 |
|  | (Dollars in Thousands) |
Other current and noncurrent assets |  | $ | (32,572 | ) |  | $ | (29,342 | )
Accrued salaries, benefits and payroll taxes |  |  | 5,986 |  |  |  | (6,234 | )
Accrued insurance and other taxes |  |  | 4,555 |  |  |  | 10,230 |
Accrued income taxes |  |  | 6,220 |  |  |  | 16,393 |
Accrued pension, postretirement and postemployment benefits |  |  | (131,963 | ) |  |  | (5,807 | )
Other current and noncurrent liabilities |  |  | 2,769 |  |  |  | 49,244 |
|  | $ | (145,005 | ) |  | $ | 34,484 |
Schedule Of Other Significant Noncash Transactions | Noncash investing and financing activities are as follows:
|  | Nine-Months Ended |
|  | September 30, |
|  | 2018 |  |  | 2017 |
|  | (Dollars in Thousands) |
Noncash investing and financing activities: |  |  |  |  |  |  |  |
Accrued liabilities for purchases of property, plant and equipment |  | $ | 24,930 |  |  | $ | 20,339 |
Acquisition of assets through capital lease |  | $ | 449 |  |  | $ | 196 |
Settlement of royalty obligation via asset sale |  | $ | — |  |  | $ | 900 |
Supplemental Disclosures of Cash Flow Information | Supplemental disclosures of cash flow information are as follows:
|  | Nine-Months Ended |
|  | September 30, |
|  | 2018 |  |  | 2017 |
|  | (Dollars in Thousands) |
Cash paid for interest |  | $ | 84,522 |  |  | $ | 49,564 |
Cash paid for income taxes |  | $ | 7,253 |  |  | $ | 96,643 |

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- Definition Tabular disclosure of the net increase (decrease) in operating capital in the operating section of the statement of cash flows, represents the entire footnote disclosure that provides details regarding the net change during the reporting period of all assets and liabilities used in operating activities. + References No definition available. + Details
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- Definition Tabular disclosure of noncash investing and financing activities, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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