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Summary of Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) - Recurring - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Assets: |  |
Assets, fair value | $ 703,701 | $ 178,706
Liabilities: |  |
Liabilities, fair value | 36,307 | 35,510
Term Deposit | Cash and Cash Equivalents |  |
Assets: |  |
Assets, fair value | 540,000 |
Money Market Mutual Funds | Other Assets |  |
Assets: |  |
Assets, fair value | 60,931 | 60,175
Certificates of Deposit | Other Assets |  |
Assets: |  |
Assets, fair value | 2,200 | 2,200
Available for Sale Securities | Other Assets |  |
Assets: |  |
Assets, fair value | 61,082 | 70,478
Deferred Compensation Assets | Other Assets |  |
Assets: |  |
Assets, fair value | 36,307 | 35,510
Foreign Currency Foreign Exchange Contracts | Other Current Assets |  |
Assets: |  |
Assets, fair value | 3,181 | 10,343
Deferred Compensation Liability | Other Noncurrent Liabilities |  |
Liabilities: |  |
Liabilities, fair value | 36,307 | 35,510
Basis of Fair Value Measurement, Level 1 |  |
Assets: |  |
Assets, fair value | 160,520 | 168,363
Liabilities: |  |
Liabilities, fair value | 36,307 | 35,510
Basis of Fair Value Measurement, Level 1 | Money Market Mutual Funds | Other Assets |  |
Assets: |  |
Assets, fair value | 60,931 | 60,175
Basis of Fair Value Measurement, Level 1 | Certificates of Deposit | Other Assets |  |
Assets: |  |
Assets, fair value | 2,200 | 2,200
Basis of Fair Value Measurement, Level 1 | Available for Sale Securities | Other Assets |  |
Assets: |  |
Assets, fair value | 61,082 | 70,478
Basis of Fair Value Measurement, Level 1 | Deferred Compensation Assets | Other Assets |  |
Assets: |  |
Assets, fair value | 36,307 | 35,510
Basis of Fair Value Measurement, Level 1 | Deferred Compensation Liability | Other Noncurrent Liabilities |  |
Liabilities: |  |
Liabilities, fair value | 36,307 | 35,510
Basis of Fair Value Measurement, Level 2 |  |
Assets: |  |
Assets, fair value | 543,181 | 10,343
Basis of Fair Value Measurement, Level 2 | Term Deposit | Cash and Cash Equivalents |  |
Assets: |  |
Assets, fair value | 540,000 |
Basis of Fair Value Measurement, Level 2 | Foreign Currency Foreign Exchange Contracts | Other Current Assets |  |
Assets: |  |
Assets, fair value | $ 3,181 | $ 10,343

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