Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	$ 172,238	$ 162,094
Long-term AFS securities	307,204	257,633
Deferred compensation plan assets	53,800	52,300
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	86,816	48,109
Long-term AFS securities	146,832	149,859
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	82,511	108,069
Long-term AFS securities	158,463	103,942
Estimate of Fair Value Measurement | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation	12,368	13,752
Contingent consideration	5,528	4,991
Estimate of Fair Value Measurement | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation	12,368	13,752
Contingent consideration	0	0
Estimate of Fair Value Measurement | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation	0	0
Contingent consideration	0	0
Estimate of Fair Value Measurement | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation	0	0
Contingent consideration	5,528	4,991
Estimate of Fair Value Measurement | Recurring | Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	172,238	162,094
Long-term AFS securities	307,204	257,633
Estimate of Fair Value Measurement | Recurring | Debt Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	0	0
Long-term AFS securities	0	0
Estimate of Fair Value Measurement | Recurring | Debt Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	172,238	162,094
Long-term AFS securities	307,204	257,633
Estimate of Fair Value Measurement | Recurring | Debt Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	0	0
Long-term AFS securities	0	0
Estimate of Fair Value Measurement | Recurring | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	86,816	48,109
Long-term AFS securities	146,832	149,859
Estimate of Fair Value Measurement | Recurring | U.S. Treasury securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	0	0
Long-term AFS securities	0	0
Estimate of Fair Value Measurement | Recurring | U.S. Treasury securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	86,816	48,109
Long-term AFS securities	146,832	149,859
Estimate of Fair Value Measurement | Recurring | U.S. Treasury securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	0	0
Long-term AFS securities	0	0
Estimate of Fair Value Measurement | Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	82,511	108,069
Long-term AFS securities	158,463	103,942
Estimate of Fair Value Measurement | Recurring | Corporate debt securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	0	0
Long-term AFS securities	0	0
Estimate of Fair Value Measurement | Recurring | Corporate debt securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	82,511	108,069
Long-term AFS securities	158,463	103,942
Estimate of Fair Value Measurement | Recurring | Corporate debt securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	0	0
Long-term AFS securities	0	0
Estimate of Fair Value Measurement | Recurring | U.S. governmental agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	2,911	5,916
Long-term AFS securities	1,909	3,832
Estimate of Fair Value Measurement | Recurring | U.S. governmental agency securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	0	0
Long-term AFS securities	0	0
Estimate of Fair Value Measurement | Recurring | U.S. governmental agency securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	2,911	5,916
Long-term AFS securities	1,909	3,832
Estimate of Fair Value Measurement | Recurring | U.S. governmental agency securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term AFS securities	0	0
Long-term AFS securities	$ 0	$ 0