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v3.20.2

FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 02, 2020 | Jun. 30, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Liabilities: |  |  |  |  |
Fair value of contingent consideration asset | $ 23,100 |  | $ 19,800 |  |
Contingent consideration, gain (loss) due to change in value |  | $ (3,200) | (3,000) |  |
Contingent consideration, settlements |  |  | 300 |  |
Asset retirement obligation capitalized |  |  | 1,553 | $ 5,153 |
Level 1 |  |  |  |  |
Assets: |  |  |  |  |
Derivative Instruments |  | 0 | 0 |  | $ 0
Liabilities: |  |  |  |  |
Derivative Instruments |  | 0 | 0 |  | 0
Level 2 |  |  |  |  |
Assets: |  |  |  |  |
Derivative Instruments |  | 57,486 | 57,486 |  | 126,764
Liabilities: |  |  |  |  |
Derivative Instruments |  | 54,155 | 54,155 |  | 53,438
Level 3 |  |  |  |  |
Assets: |  |  |  |  |
Derivative Instruments |  | 0 | 0 |  | 0
Liabilities: |  |  |  |  |
Derivative Instruments |  | $ 0 | 0 |  | $ 0
Prepaid Expenses and Other Current Assets |  |  |  |  |
Liabilities: |  |  |  |  |
Fair value of contingent consideration asset |  |  | 800 |  |
Other Noncurrent Assets |  |  |  |  |
Liabilities: |  |  |  |  |
Fair value of contingent consideration asset |  |  | $ 19,000 |  |

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