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Short-term and long-term investments
 12 Months Ended
Dec. 31, 2022
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, 2022December 31, 2021
 Debt
securities		Equity
securities		TotalDebt
securities		Equity
securities		Total
Certificates of deposit and other time deposits$82,879 $— $82,879 $23,226 $— $23,226 
Investments in mutual funds and common stock— 39,143 39,143 — 48,598 48,598 
 $82,879 $39,143 $122,022 $23,226 $48,598 $71,824 
Short-term investments$67,872 $9,821 $77,693 $8,227 $14,083 $22,310 
Long-term investments15,007 29,322 44,329 14,999 34,515 49,514 
 $82,879 $39,143 $122,022 $23,226 $48,598 $71,824 
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, 2022 and 2021.
Equity securities: The Company holds certain equity investments that have readily determinable fair values from public
markets. The Company's remaining 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.