Fair Value Measures and Disclosures (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents—Money market mutual funds	$ 252,650	$ 0
Equity securities, at fair value	82,823	102,529
Trading securities held in a "rabbi trust"	399	179
Total assets	335,872	102,708
Deferred compensation accrual "rabbi trust"	396	188
Total liabilities	396	188
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents—Money market mutual funds	252,650	0
Equity securities, at fair value	36	174
Trading securities held in a "rabbi trust"	399	179
Total assets	253,085	353
Deferred compensation accrual "rabbi trust"	396	188
Total liabilities	396	188
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents—Money market mutual funds	0	0
Equity securities, at fair value	0	0
Trading securities held in a "rabbi trust"	0	0
Total assets	0	0
Deferred compensation accrual "rabbi trust"	0	0
Total liabilities	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents—Money market mutual funds	0	0
Equity securities, at fair value	82,787	102,355
Trading securities held in a "rabbi trust"	0	0
Total assets	82,787	102,355
Deferred compensation accrual "rabbi trust"	0	0
Total liabilities	$ 0	$ 0