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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Stock-Based Compensation) (Details) | 12 Months Ended
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Dec. 31, 2020
Phantom Share Units (PSUs) [Member] | PBFX [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 4 years
Minimum [Member] | Performance Units [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Distribution Percentage Based On Performance Measurements | 0.00%
Minimum [Member] | Performance share units [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Distribution Percentage Based On Performance Measurements | 0.00%
Maximum [Member] | Performance Units [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Distribution Percentage Based On Performance Measurements | 200.00%
Maximum [Member] | Performance share units [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Distribution Percentage Based On Performance Measurements | 200.00%

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- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Distribution Percentage Based On Performance Measurements + References No definition available. + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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=116856206&loc=d3e5070-113901 + Details
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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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