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Other Noncurrent Liabilities | 6 Months Ended
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Jun. 30, 2020
Other Liabilities Disclosure [Abstract] |
Other Noncurrent Liabilities | Other Noncurrent Liabilities The components of other noncurrent liabilities as of June 30, 2020 and December 31, 2019 were:
| June 30, 2020 |  | December 31, 2019
Pension and retiree medical obligations | $ | 83,915 |  |  | $ | 87,478 |
Transition tax payable | 13,750 |  |  | 11,292 |
Liability for uncertain tax positions | 1,071 |  |  | 3,008 |
Deferred revenue | 1,615 |  |  | 2,129 |
Lease liability | 94,503 |  |  | 69,928 |
Other | 21,532 |  |  | 23,533 |
Total other noncurrent liabilities | $ | 216,386 |  |  | $ | 197,368 |

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