| (a) | The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the condensed consolidated balance sheets to the total of such amounts reported in the condensed consolidated statements of cash flows. |
| (in thousands) | March 31, 2024 |
December 31,
2023 | March 31, 2023 |
December 31,
2022 | ||||||||||||
| Cash and cash equivalents | $ | 212,040 | $ | 331,525 | $ | 525,898 | $ | 388,134 | ||||||||
| Restricted cash included in prepaid expenses and other current assets | 120 | 119 | 115 | 114 | ||||||||||||
| Restricted cash included in other assets | 1,453 | 1,467 | 3,889 | 3,727 | ||||||||||||
| Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows | $ | 213,613 | $ | 333,111 | $ | 529,902 | $ | 391,975 | ||||||||
| Amounts included in restricted cash as of March 31, 2024 and December 31, 2023 primarily relate to guarantees in the form of a standby letter of credit as security for a long-term real estate lease. Amounts included in restricted cash as of March 31, 2023 and December 31, 2022 primarily relate to $3,435 deposited into an escrow account relating to the initial investment in the NAMI joint venture. The remaining amounts in restricted cash in all periods presented relate to collateral for letters of credit and bank guarantees. | ||||||||||||||||
