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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Operating Leases: |  |
Operating lease ROU assets | $ 41.3 | $ 30.6
Operating lease current liabilities | 7.6 | 7.7
Operating lease non-current liabilities | 31.4 | 17.6
Total operating lease liabilities | 39.0 |
Finance Leases: |  |
Finance Lease Assets | 2.5 | 2.5
Finance lease current liabilities | 1.0 | 1.0
Finance lease non-current liabilities | 1.6 | 1.7
Total finance lease liabilities | $ 2.6 | $ 2.7
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Other long-term liabilities | us-gaap:OtherLiabilitiesNoncurrent | us-gaap:OtherLiabilitiesNoncurrent
Property, plant and equipment, net | us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization | us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Long-term debt | us-gaap:LongTermDebtNoncurrent | us-gaap:LongTermDebtNoncurrent
Liabilities |  |
Operating Leases: |  |
Total operating lease liabilities | $ 39.0 | $ 25.3
Patterson-Kelley, LLC |  |
Finance Leases: |  |
Favorable leasehold interests | $ 6.6 | $ 6.9

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