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Summary of Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) - Recurring - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Assets: |  |
Assets, fair value | $ 188,977 | $ 213,370
Liabilities: |  |
Liabilities, fair value | 33,871 | 32,998
Money Market Mutual Funds | Other Assets |  |
Assets: |  |
Assets, fair value | 111,652 | 106,530
Certificates of Deposit | Other Assets |  |
Assets: |  |
Assets, fair value | 2,202 | 5,415
Available for Sale Securities | Other Assets |  |
Assets: |  |
Assets, fair value | 43,046 | 55,594
Deferred Compensation Assets | Other Assets |  |
Assets: |  |
Assets, fair value | 33,871 | 32,998
Interest Rate Swap Agreements | Accounts Receivable, Net |  |
Assets: |  |
Assets, fair value |  | 3,925
Foreign Currency Foreign Exchange Contracts | Other Current Assets |  |
Assets: |  |
Assets, fair value |  | 8,908
Offsetting of assets, fair value | (1,794) |
Deferred Compensation Liability | Other Noncurrent Liabilities |  |
Liabilities: |  |
Liabilities, fair value | 33,871 | 32,998
Basis of Fair Value Measurement, Level 1 |  |
Assets: |  |
Assets, fair value | 190,771 | 200,537
Liabilities: |  |
Liabilities, fair value | 33,871 | 32,998
Basis of Fair Value Measurement, Level 1 | Money Market Mutual Funds | Other Assets |  |
Assets: |  |
Assets, fair value | 111,652 | 106,530
Basis of Fair Value Measurement, Level 1 | Certificates of Deposit | Other Assets |  |
Assets: |  |
Assets, fair value | 2,202 | 5,415
Basis of Fair Value Measurement, Level 1 | Available for Sale Securities | Other Assets |  |
Assets: |  |
Assets, fair value | 43,046 | 55,594
Basis of Fair Value Measurement, Level 1 | Deferred Compensation Assets | Other Assets |  |
Assets: |  |
Assets, fair value | 33,871 | 32,998
Basis of Fair Value Measurement, Level 1 | Deferred Compensation Liability | Other Noncurrent Liabilities |  |
Liabilities: |  |
Liabilities, fair value | 33,871 | 32,998
Basis of Fair Value Measurement, Level 2 |  |
Assets: |  |
Assets, fair value |  | 12,833
Assets, fair value | (1,794) |
Basis of Fair Value Measurement, Level 2 | Interest Rate Swap Agreements | Accounts Receivable, Net |  |
Assets: |  |
Assets, fair value |  | 3,925
Basis of Fair Value Measurement, Level 2 | Foreign Currency Foreign Exchange Contracts | Other Current Assets |  |
Assets: |  |
Assets, fair value |  | $ 8,908
Offsetting of assets, fair value | $ (1,794) |

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