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v3.21.1

SHARE-BASED COMPENSATION (Narrative) (Details) - trading_day | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |
Trading days proceeding and performance period | 10 | 10
Performance Restricted Stock Units | Performance Restricted Stock Units Granted In 2021 |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |
Vesting period | 3 years |
Performance Restricted Stock Units | Performance Restricted Stock Units Granted In 2021 | Maximum |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |
Vesting percentage | 200.00% |
Performance Restricted Stock Units | Performance Restricted Stock Units Granted In 2021 | Minimum |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |
Vesting percentage | 0.00% |
Performance Restricted Stock Units | Performance Restricted Stock Units granted in 2020 and 2019 |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |
Vesting period | 3 years |
Performance Restricted Stock Units | Performance Restricted Stock Units granted in 2020 and 2019 | Maximum |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |
Vesting percentage | 125.00% |
Performance Restricted Stock Units | Performance Restricted Stock Units granted in 2020 and 2019 | Minimum |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |
Vesting percentage | 75.00% |
Performance Restricted Stock Units | Performance Restricted Stock Units granted in 2018 and prior |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |
Vesting period | 3 years |
Performance Restricted Stock Units | Performance Restricted Stock Units granted in 2018 and prior | Maximum |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |
Vesting percentage | 200.00% |
Performance Restricted Stock Units | Performance Restricted Stock Units granted in 2018 and prior | Minimum |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |
Vesting percentage | 0.00% |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Percentage of vesting of award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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