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Short-term and long-term investments
 12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Investments in Debt and Equity Securities Short-term and long-term investments
The Company’s short-term and long-term investments, consisting of debt instruments classified as held-to-maturity and equity investments with readily determinable fair values or redemption values, were as follows:
 December 31, 2023December 31, 2022
 Debt
securities		Equity
securities		TotalDebt
securities		Equity
securities		Total
Certificates of deposit and other time deposits$22,109 $— $22,109 $82,879 $— $82,879 
Investments in mutual funds and common stock— 37,391 37,391 — 39,143 39,143 
 $22,109 $37,391 $59,500 $82,879 $39,143 $122,022 
Short-term investments$7,110 $4,500 $11,610 $67,872 $9,821 $77,693 
Long-term investments14,999 32,891 47,890 15,007 29,322 44,329 
 $22,109 $37,391 $59,500 $82,879 $39,143 $122,022 
Debt securities: The Company's short-term debt investments are principally bank certificates of deposit with contractual maturities longer than three months but shorter than one year. The Company's long-term debt investments are bank time deposits with contractual maturities longer than one year. These debt securities are accounted for as held-to-maturity and recorded at amortized cost, which approximated their fair values at December 31, 2023 and 2022.
Equity securities: Substantially all of the Company's short-term and long-term equity investments are held within a trust to fund existing obligations associated with the Company’s non-qualified deferred compensation plans.