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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Operating Leases |  |
Other noncurrent assets | $ 62,805 |
Accrued liabilities and other | 13,340 | $ 0
Other long-term liabilities | 48,326 |
Total operating lease liabilities | 61,666 |
Finance Leases |  |
Property and equipment, gross | 106,989 |
Accumulated depreciation | (47,178) |
Property and equipment, net | 59,811 |
Total finance lease liabilities | $ 75,744 |
Weighted Average Remaining Lease Term |  |
Weighted-average remaining lease term - finance leases | 2 years 4 months 9 days |
Weighted-average remaining lease term - operating leases | 4 years 11 months 15 days |
Weighted Average Discount Rate |  |
Weighted-average discount rate - finance leases | 6.40% |
Weighted-average discount rate - operating leases | 5.19% |

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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