Summary of Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) - Recurring - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets:
Assets, fair value	$ 205,278	$ 235,122
Liabilities:
Liabilities, fair value	39,391	38,032
Money Market Mutual Funds | Other Assets
Assets:
Assets, fair value	115,601	113,649
Certificates of Deposit | Other Assets
Assets:
Assets, fair value	2,200	2,200
Equity Securities | Other Assets
Assets:
Assets, fair value	48,003	78,099
Deferred Compensation Assets | Other Assets
Assets:
Assets, fair value	39,391	38,032
Foreign Currency Forward Exchange Contracts | Other Current Assets
Assets:
Assets, fair value	83	3,142
Deferred Compensation Liability | Other Noncurrent Liabilities
Liabilities:
Liabilities, fair value	39,391	38,032
Basis of Fair Value Measurement, Level 1
Assets:
Assets, fair value	202,995	229,780
Liabilities:
Liabilities, fair value	39,391	38,032
Basis of Fair Value Measurement, Level 1 | Money Market Mutual Funds | Other Assets
Assets:
Assets, fair value	115,601	113,649
Basis of Fair Value Measurement, Level 1 | Equity Securities | Other Assets
Assets:
Assets, fair value	48,003	78,099
Basis of Fair Value Measurement, Level 1 | Deferred Compensation Assets | Other Assets
Assets:
Assets, fair value	39,391	38,032
Basis of Fair Value Measurement, Level 1 | Deferred Compensation Liability | Other Noncurrent Liabilities
Liabilities:
Liabilities, fair value	39,391	38,032
Basis of Fair Value Measurement, Level 2
Assets:
Assets, fair value	2,283	5,342
Basis of Fair Value Measurement, Level 2 | Certificates of Deposit | Other Assets
Assets:
Assets, fair value	2,200	2,200
Basis of Fair Value Measurement, Level 2 | Foreign Currency Forward Exchange Contracts | Other Current Assets
Assets:
Assets, fair value	$ 83	$ 3,142