Fair Value Measurements - Fair Value Of Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value Measurements [Line Items]
Equity securities	$ 109,861	$ 116,374
Fair value, Measurements, Recurring
Fair Value Measurements [Line Items]
Equity securities	109,861	116,374
Total	154,927	157,951
Fair value, Measurements, Recurring \| Mutual Funds \| Investments, Employee Benefit Plans, At Fair Value
Fair Value Measurements [Line Items]
Mutual funds and money market funds, fair value	40,413	36,810
Fair value, Measurements, Recurring \| Money Market Funds \| Investments, Employee Benefit Plans, At Fair Value
Fair Value Measurements [Line Items]
Mutual funds and money market funds, fair value	4,653	4,767
Fair value, Measurements, Recurring \| Level 1
Fair Value Measurements [Line Items]
Equity securities	109,861	116,374
Total	150,274	153,184
Fair value, Measurements, Recurring \| Level 1 \| Mutual Funds \| Investments, Employee Benefit Plans, At Fair Value
Fair Value Measurements [Line Items]
Mutual funds and money market funds, fair value	40,413	36,810
Fair value, Measurements, Recurring \| Level 1 \| Money Market Funds \| Investments, Employee Benefit Plans, At Fair Value
Fair Value Measurements [Line Items]
Mutual funds and money market funds, fair value	0	0
Fair value, Measurements, Recurring \| Level 2
Fair Value Measurements [Line Items]
Equity securities	0	0
Total	4,653	4,767
Fair value, Measurements, Recurring \| Level 2 \| Mutual Funds \| Investments, Employee Benefit Plans, At Fair Value
Fair Value Measurements [Line Items]
Mutual funds and money market funds, fair value	0	0
Fair value, Measurements, Recurring \| Level 2 \| Money Market Funds \| Investments, Employee Benefit Plans, At Fair Value
Fair Value Measurements [Line Items]
Mutual funds and money market funds, fair value	4,653	4,767
Fair value, Measurements, Recurring \| Level 3
Fair Value Measurements [Line Items]
Equity securities	0	0
Total	0	0
Fair value, Measurements, Recurring \| Level 3 \| Mutual Funds \| Investments, Employee Benefit Plans, At Fair Value
Fair Value Measurements [Line Items]
Mutual funds and money market funds, fair value	0	0
Fair value, Measurements, Recurring \| Level 3 \| Money Market Funds \| Investments, Employee Benefit Plans, At Fair Value
Fair Value Measurements [Line Items]
Mutual funds and money market funds, fair value	$ 0	$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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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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