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Fair Value Measurements - Fair Value Of Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Fair Value Measurements [Line Items]
Equity securities	$ 90,446	$ 116,374
Fair value, Measurements, Recurring
Fair Value Measurements [Line Items]
Equity securities	90,446	116,374
Total	136,379	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	41,493	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	4,440	4,767
Fair value, Measurements, Recurring | Level 1
Fair Value Measurements [Line Items]
Equity securities	90,446	116,374
Total	131,939	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	41,493	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	4,440	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	4,440	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

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Fair value portion of asset recognized for present right to economic benefit.

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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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