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Leases - Lease cost and other information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Lease Cost Components: |  |  |  |  |
Amortization of ROU assets - finance leases | $ 117 | $ 117 | $ 350 | $ 350 |
Interest on lease liabilities - finance leases | 8 | 10 | 26 | 31 |
Operating lease cost (cost resulting from lease payments) | 4,025 | 4,296 | 12,658 | 12,814 |
Short-term lease cost | 144 | 104 | 467 | 318 |
Variable lease cost (cost excluded from lease payments) | 704 | 852 | 2,457 | 2,327 |
Total lease cost | 4,998 | 5,379 | 15,958 | 15,840 |
Supplemental Cash Flow and Other Information Related to Leases: |  |  |  |  |
Finance lease - operating cash flows | 8 | 10 | 26 | 31 |
Finance lease - financing cash flows | 120 | 111 | 357 | 331 |
Operating lease - operating cash flows (fixed payments) | 4,450 | 4,233 | 12,862 | 12,483 |
Operating lease - operating cash flows (net change asset/liability) | $ (3,436) | $ (3,400) | (10,103) | (10,008) |
New ROU assets - operating leases |  |  | $ 9,093 | $ 701 |
Weighted - average remaining lease term (years) - finance leases | 3 years 8 months 8 days | 4 years 8 months 4 days | 3 years 8 months 8 days | 4 years 8 months 4 days |
Weighted - average remaining lease term (years) - operating leases | 8 years 7 months 17 days | 9 years 5 months 19 days | 8 years 7 months 17 days | 9 years 5 months 19 days |
Weighted - average discount rate - finance leases | 1.70% | 1.70% | 1.70% | 1.70% |
Weighted - average discount rate - operating leases | 3.40% | 3.10% | 3.40% | 3.10% |
Maturity Analysis of Lease Liabilities: |  |  |  |  |
2024 (excluding 9 months ended September 30, 2024) | $ 4,300 |  | $ 4,300 |  |
2025 | 16,467 |  | 16,467 |  |
2026 | 15,964 |  | 15,964 |  |
2027 | 14,797 |  | 14,797 |  |
2028 | 14,138 |  | 14,138 |  |
Thereafter | 61,258 |  | 61,258 |  |
Total undiscounted cash flows | 126,924 |  | 126,924 |  |
Discount on cash flows | (18,392) |  | (18,392) |  |
Total operating lease liabilities | $ 108,532 |  | $ 108,532 |  | $ 108,300
Operating Lease, Liability, Statement of Financial Position [Extensible List] | Other Liabilities. |  | Other Liabilities. |  | Other Liabilities.

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