Summary of significant accounting policies - Post-employment Benefits (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
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| Accounting Policies [Abstract] | |||
| Employer contribution, percentage | 8.33% | ||
| Severance pay | $ 4,629,000 | $ 5,537,000 | $ 4,096,000 |
| Maximum contribution percent of pretax salary (up to) | 99.00% | ||
| Maximum amount of contribution per employee | $ 22,500 | ||
| Additional contribution amount for employees over 50 | $ 7,500 | ||
| Employee contribution match, percent | 100.00% | ||
| Employer contribution percent of salary, maximum, percent | 4.00% | ||
| Company's matching contribution amount | $ 862,000 | $ 873,000 | $ 656,000 |
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- Definition Defined Contribution Plan, Employer Contribution, Percentage Of Employee Monthly Salary No definition available.
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- Definition Defined Contribution Plan, Maximum Annual Contributions Per Employee, Additional Amount No definition available.
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- References No definition available.
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- Definition Amount of cost for defined contribution plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. No definition available.
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- Definition Percentage employer matches of the employee's percentage contribution matched. No definition available.
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- Definition Maximum amount the employee may contribute to a defined contribution plan. No definition available.
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. No definition available.
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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