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SHARE-BASED PAYMENTS SHARE-BASED PAYMENTS (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common Stock, Capital Shares Reserved for Future Issuance | 8,500,000 |  |
Number of Shares Available for Issuance | 5,500,000 |  |
Forfeiture rate maximum (in hundredths) | 3.00% |  |
Allocated share-based compensation expense | $ 54,100 | $ 29,400 | $ 46,500
Tax Benefit | $ 14,400 | $ 14,100 | $ 31,700
Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award Vesting Period | 3 years |  |
Nonvested Award, Cost Not yet Recognized, Amount | $ 19,300 |  |
Nonvested Award, Cost Not yet Recognized, Period for Recognition | 1 year 9 months 18 days |  |
Nonvested, number of units | 779,937 | 646,287 |
Granted, units | 417,212 |  |
Released to participants, units | (242,765) |  |
Forfeited, units | (40,797) |  |
Nonvested, Weighted Average Grant Date Fair Value | $ 59.02 | $ 63.85 |
Grants in Period, Weighted Average Grant Date Fair Value | 46.84 | $ 76.49 | $ 58.07
Vested in Period, Weighted Average Grant Date Fair Value | 51.57 |  |
Forfeitures, Weighted Average Grant Date Fair Value | $ 55.27 |  |
Granted in Period, Fair Value | $ 19,542 | $ 16,552 | $ 15,238
Vested in Period, Fair Value | $ 12,519 | $ 11,204 | $ 10,691
Performance-Unit Activity |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Payment Award, Description | Upon vesting, a holder of outstanding performance units is entitled to receive a number of shares of our common stock equal to a percentage (0% to 200%) of the performance units granted, based on our total shareholder return over the vesting period, compared with the total shareholder return of a peer group of other energy companies over the same period. |  |
Award Vesting Period | 3 years |  |
Nonvested Award, Cost Not yet Recognized, Amount | $ 31,700 |  |
Nonvested Award, Cost Not yet Recognized, Period for Recognition | 1 year 9 months 18 days |  |
Nonvested, number of units | 976,585 | 834,246 |
Granted, units | 542,183 |  |
Released to participants, units | (311,907) |  |
Forfeited, units | (87,937) |  |
Nonvested, Weighted Average Grant Date Fair Value | $ 72.73 | $ 75.96 |
Grants in Period, Weighted Average Grant Date Fair Value | 62.03 | $ 88.43 | $ 68.02
Vested in Period, Weighted Average Grant Date Fair Value | 64.00 |  |
Forfeitures, Weighted Average Grant Date Fair Value | $ 68.37 |  |
Granted in Period, Fair Value | $ 33,632 | $ 25,028 | $ 23,020
Vested in Period, Fair Value | $ 19,962 | $ 17,722 | $ 15,018
Volatility | 60.30% | 21.70% | 27.10%
Dividend yield | 8.13% | 4.87% | 5.05%
Risk-free interest rate | 0.21% | 1.39% | 2.47%
Employee Stock Purchase Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common Stock, Capital Shares Reserved for Future Issuance | 11,600,000 |  |
Maximum allowable percentage of annual base pay withheld to purchase our common stock | 10.00% |  |
Purchase price percentage of the lower of its grant date or exercise date market price | 85.00% |  |
Employee participation in the plan (in hundredths) | 69.00% | 68.00% | 62.00%
Shares sold under the Employee Stock Purchase Plan | 277,012 | 359,977 | 171,590
Weighted Average Share Price of Shares Sold Under the Employee Stock Purchase Plan (In Dollars per Share) | $ 38.98 | $ 27.78 | $ 51.24
Employee Stock Award Program [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common Stock, Capital Shares Reserved for Future Issuance | 900,000 |  |
Allocated share-based compensation expense |  | $ 200 | $ 1,000
Shares Awarded Under Employee Stock Award Program | 0 | 2,871 | 14,022
Share Price of Next Award to be Issued Under the Employee Stock Award Program | $ 78 |  |
Non-employees and Directors [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Maximum Value of Shares For Which Awards May Be Issued To A Participant During Any Year | $ 800 |  |
Granted, units | 0 |  |
Options, Outstanding, Number | 0 |  |

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- Definition Description of terms of share-based payment arrangement. Includes, but is not limited to, type of award or grantee and reason for issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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 (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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 (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + 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 (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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 (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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 (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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