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Leases - Components of lease expense, and lease assets and liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Lease Cost: |  |  |  |  |
Amortization of right-of-use assets (included in depreciation expense) | $ 24 | $ 24 | $ 72 | $ 420 |
Interest on lease liabilities | 7 | 9 | 22 | 184 |
Operating lease cost | 4,278 | 4,270 | 12,977 | 11,866 |
Short-term lease cost | 64 | 90 | 208 | 281 |
Variable lease cost | 466 | 410 | 1,408 | 1,324 |
Total lease cost | 4,839 | $ 4,803 | 14,687 | 14,075 |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |
Operating cash flows used for finance lease |  |  | 22 | 203 |
Operating cash flows used for operating leases |  |  | 13,462 | 12,870 |
Financing cash flows used for finance lease |  |  | 123 | 833 |
Right-of-use assets obtained in exchange for new operating lease liabilities |  |  | 11,525 | $ 32,398 |
Assets and Liabilities, Lessee [Abstract] |  |  |  |  |
Finance lease right-of-use assets (included in other assets) | $ 688 |  | $ 688 |  | $ 760
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | Other assets, net |  | Other assets, net |  | Other assets, net
Operating lease right-of-use assets | $ 95,533 |  | $ 95,533 |  | $ 99,158
Finance lease liability, current (included in current installments of long-term debt) | $ 171 |  | $ 171 |  | $ 165
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | Current installments of long-term debt |  | Current installments of long-term debt |  | Current installments of long-term debt
Finance lease liability, noncurrent (included in long-term debt) | $ 399 |  | $ 399 |  | $ 529
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Long-term debt, less current installments |  | Long-term debt, less current installments |  | Long-term debt, less current installments
Operating lease liabilities, current (included in accrued liabilities) | $ 12,097 |  | $ 12,097 |  | $ 13,465
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Accrued liabilities |  | Accrued liabilities |  | Accrued liabilities
Operating lease liabilities, noncurrent | $ 87,983 |  | $ 87,983 |  | $ 90,878
Weighted average remaining lease term – finance leases | 3 years 2 months 12 days |  | 3 years 2 months 12 days |  | 3 years 10 months 24 days
Weighted average remaining lease term – operating leases | 9 years 10 months 24 days |  | 9 years 10 months 24 days |  | 10 years
Weighted average discount rate – finance leases | 4.80% |  | 4.80% |  | 4.80%
Weighted average discount rate – operating leases | 4.10% |  | 4.10% |  | 4.10%

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