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Leases - Leases Balance Sheet (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Leases [Abstract] |  |
Other assets | $ 132,777 | $ 133,864
Accrued expenses | 18,013 | 23,137
Other noncurrent liabilities | 116,394 | 114,686
Total operating lease liabilities | 134,407 | 137,823
Net property, plant and equipment | 58,962 | 59,494
Current portion of long-term debt(a) | 1,412 | 636
Long-term debt | 58,576 | 58,888
Total finance lease liabilities | $ 59,988 | $ 59,524
Weighted average remaining lease term, operating leases | 16 years 4 months 24 days | 11 years 4 months 24 days
Weighted average remaining lease term, finance leases | 27 years 8 months 12 days | 28 years 3 months 18 days
Weighted average discount rate, operating leases, percent | 4.06% | 3.84%
Weighted average discount rate, finance leases, percent | 4.56% | 4.56%

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