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Other Noncurrent Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Other Liabilities Disclosure [Abstract] |
Schedule of Other Noncurrent Liabilities | As of December 31 of each year, Other noncurrent liabilities consists of:
(in thousands) |  | 2017 |  | 2016
Pension liabilities |  | $39,473 |  |  | $35,921 |
Postretirement benefits other than pensions |  | 54,423 |  |  | 53,293 |
Obligations under license agreement |  | 897 |  |  | 10,254 |
Incentive and deferred compensation |  | 3,048 |  |  | 3,468 |
Restructuring |  | 600 |  |  | 908 |
Other |  | 3,114 |  |  | 2,983 |
Total |  | $101,555 |  |  | $106,827 |

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