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Leases (Tables) | 6 Months Ended
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Jun. 30, 2019
Leases [Abstract] |
Components of Lease Costs Included in Operating Expenses | The components of lease costs, which were included in operating expenses in our Condensed Consolidated Statements of Operations, were as follows (in thousands):
| Three months ended June 30, |  | Six months ended June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Operating lease cost | $ | 2,957 |  |  | $ | 1,886 |  |  | $ | 5,914 |  |  | $ | 3,724 |
Variable lease cost | 1,781 |  |  | 1,182 |  |  | 3,054 |  |  | 2,275 |
Total lease costs | $ | 4,738 |  |  | $ | 3,068 |  |  | $ | 8,968 |  |  | $ | 5,999 |
Summary of Maturities of Operating Lease Liabilities | As of June 30, 2019, the maturities of our operating lease liabilities were as follows (in thousands):
Year ended December 31, |
2019 (Six months ended) | $ | 4,417 |
2020 | 9,690 |
2021 | 12,671 |
2022 | 13,087 |
2023 | 13,515 |
2024 | 13,956 |
2025 and thereafter | 78,233 |
Total lease payments | 145,569 |
Less: portion representing interest | (43,021 | )
Less: lease incentives | (3,977 | )
Operating lease liabilities | 98,571 |
Less: current portion | (3,749 | )
Operating lease liabilities, less current portion | $ | 94,822 |

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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