Summary of Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) - Recurring - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets:
Assets, fair value	$ 211,330	$ 206,412
Liabilities:
Liabilities, fair value	50,803	44,971
Money Market Mutual Funds | Other Noncurrent Assets
Assets:
Assets, fair value	115,205	111,129
Certificates of Deposit | Other Noncurrent Assets
Assets:
Assets, fair value	2,201	2,300
Equity Securities | Other Noncurrent Assets
Assets:
Assets, fair value	44,654	49,923
Deferred Compensation Assets | Other Noncurrent Assets
Assets:
Assets, fair value	49,270	43,060
Foreign Currency Forward Exchange Contracts | Accrued Liabilities Other
Liabilities:
Liabilities, fair value	1,533	1,911
Deferred Compensation Liability | Other Noncurrent Liabilities
Liabilities:
Liabilities, fair value	49,270	43,060
Basis of Fair Value Measurement, Level 1
Assets:
Assets, fair value	209,129	204,112
Liabilities:
Liabilities, fair value	49,270	43,060
Basis of Fair Value Measurement, Level 1 | Money Market Mutual Funds | Other Noncurrent Assets
Assets:
Assets, fair value	115,205	111,129
Basis of Fair Value Measurement, Level 1 | Equity Securities | Other Noncurrent Assets
Assets:
Assets, fair value	44,654	49,923
Basis of Fair Value Measurement, Level 1 | Deferred Compensation Assets | Other Noncurrent Assets
Assets:
Assets, fair value	49,270	43,060
Basis of Fair Value Measurement, Level 1 | Deferred Compensation Liability | Other Noncurrent Liabilities
Liabilities:
Liabilities, fair value	49,270	43,060
Basis of Fair Value Measurement, Level 2
Assets:
Assets, fair value	2,201	2,300
Liabilities:
Liabilities, fair value	1,533	1,911
Basis of Fair Value Measurement, Level 2 | Certificates of Deposit | Other Noncurrent Assets
Assets:
Assets, fair value	2,201	2,300
Basis of Fair Value Measurement, Level 2 | Foreign Currency Forward Exchange Contracts | Accrued Liabilities Other
Liabilities:
Liabilities, fair value	$ 1,533	$ 1,911