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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity | The following table sets forth a summary of stock-settled stock appreciation rights and related information for the periods presented:
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
| Awards |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contractual Life |  | Aggregate Intrinsic Value (In thousands) |  | Awards |  | Weighted-Average Exercise Price |  | Awards |  | Weighted-Average Exercise Price
Beginning of year | 2,161,556 |  |  | $ | 60.48 |  |  |  |  |  |  | 2,337,049 |  |  | $ | 59.72 |  |  | 2,351,633 |  |  | $ | 59.26 |
Granted | 139,592 |  |  | 77.05 |  |  |  |  |  |  | 262,091 |  |  | 48.32 |  |  | 213,618 |  |  | 54.63 |
Exercised | (916,906) |  |  | 60.70 |  |  |  |  |  |  | (391,339) |  |  | 47.11 |  |  | (113,099) |  |  | 35.01 |
Canceled | (13,854) |  |  | 54.42 |  |  |  |  |  |  | (46,245) |  |  | 65.93 |  |  | (115,103) |  |  | 65.27 |
End of year | 1,370,388 |  |  | 62.09 |  |  | 6.1 |  | $ | 95,246 |  |  | 2,161,556 |  |  | 60.48 |  |  | 2,337,049 |  |  | 59.72 |
Exercisable at end of year | 1,001,708 |  |  | $ | 62.79 |  |  | 5.3 |  | $ | 68,920 |  |  | 1,630,891 |  |  | $ | 62.72 |  |  | 1,723,370 |  |  | $ | 59.00 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The following table sets forth the weighted-average assumptions used to estimate the fair value of stock-settled stock appreciation rights granted during the periods presented:
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Stock-settled stock appreciation rights granted | 139,592 |  | 262,091 |  | 213,618
Risk free interest rate | 0.8% |  | 1.4% |  | 2.5%
Expected life (in years) | 7 |  | 5 |  | 5
Expected volatility | 41% |  | 30% |  | 29%
Schedule of Share-based Compensation, Restricted Stock Units Award Activity | The following table sets forth a summary of time-based restricted stock units and related information for the periods presented:
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
| Awards |  | Weighted-Average Fair Value |  | Awards |  | Weighted-Average Fair Value |  | Awards |  | Weighted-Average Fair Value
Unvested at beginning of year | 921,495 |  |  | $ | 43.15 |  |  | 363,729 |  |  | $ | 60.00 |  |  | 327,798 |  |  | $ | 57.87 |
Granted | 314,480 |  |  | 77.81 |  |  | 656,717 |  |  | 37.44 |  |  | 192,106 |  |  | 54.13 |
Vested | (232,152) |  |  | 44.10 |  |  | (83,253) |  |  | 69.17 |  |  | (136,777) |  |  | 46.52 |
Forfeited | (29,661) |  |  | 63.86 |  |  | (15,698) |  |  | 56.79 |  |  | (19,398) |  |  | 59.62 |
Unvested at end of year | 974,162 |  |  | $ | 53.48 |  |  | 921,495 |  |  | $ | 43.15 |  |  | 363,729 |  |  | $ | 60.00 |
The following table sets forth a summary of performance-based awards and related information for the periods presented:
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
| Awards |  | Weighted-Average Fair Value |  | Awards |  | Weighted-Average Fair Value |  | Awards |  | Weighted-Average Fair Value
Unvested at beginning of year | 305,269 |  |  | $ | 52.61 |  |  | 195,305 |  |  | $ | 60.24 |  |  | 138,896 |  |  | $ | 59.33 |
Granted | 122,812 |  |  | 76.76 |  |  | 158,756 |  |  | 49.56 |  |  | 126,874 |  |  | 54.64 |
Vested | (22,371) |  |  | 62.80 |  |  | (25,909) |  |  | 78.04 |  |  | (25,696) |  |  | 42.44 |
Forfeited | (24,891) |  |  | 61.26 |  |  | (22,883) |  |  | 69.39 |  |  | (44,769) |  |  | 52.11 |
Unvested at end of year | 380,819 |  |  | $ | 59.23 |  |  | 305,269 |  |  | $ | 52.61 |  |  | 195,305 |  |  | $ | 60.24 |

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