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Summary of Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Operating leases |  |
Operating lease right-of-use assets, gross | $ 175,898 |
Accumulated amortization | 17,813 |
Operating lease right-of-use assets, net | 158,085 |
Current portion of operating leases | 29,351 |
Non-current operating leases | 143,426 |
Total operating lease liabilities | 172,777 |
Finance leases |  |
Property and equipment, gross | 13,290 |
Accumulated depreciation | (2,785) |
Property and equipment, net | 10,505 |
Current portion of finance leases, net | 1,763 |
Noncurrent finance leases, net | 5,323 |
Total finance lease liabilities | $ 7,086 | $ 7,127

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