Leases (Details) $ in Thousands	6 Months Ended
Jun. 30, 2025 USD ($) lease item	Jun. 30, 2024 USD ($)
Leases
Option to renew operating leases	false
Operating lease costs	$ 8,749	$ 8,037
Weighted-average remaining lease term	7 years 4 months 6 days
Weighted-average discount rate of operating leases	4.32%
Operating lease payments	$ 8,358	$ 7,279
Number of financing leases \| lease	0
Operating lease commitments not yet commenced
Leases
Non-cancelable operating lease commitments not yet commenced	$ 16,545
Number of off-campus classroom and laboratory sites \| item	3
Minimum
Leases
Term of operating leases	7 months
Maximum
Leases
Term of operating leases	10 years 6 months

The number of financing leases maintained by the entity.

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The number of off-campus classroom and laboratory sites.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Indicates (true false) whether lessee has option to extend operating lease.

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Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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- Definition

Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of unrecorded obligation to transfer funds in future for fixed or minimum amount or quantity of product and service at fixed or minimum price. Includes, but is not limited to, lease not yet commenced and take-or-pay and throughput contracts.

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