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STOCKHOLDERS' EQUITY, Restricted Stock Plan (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
May 31, 2021 | Feb. 28, 2021 | Oct. 31, 2018 | Dec. 31, 2021 | Jun. 30, 2020 | Jan. 31, 2013
Restricted Stock Units [Member] | Chief Executive Officer [Member] |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |
Number of restricted stock units granted (in shares) |  |  | 644,000 |  |  |
Serviced Based Restricted Stock Units [Member] | Chief Executive Officer [Member] |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |
Vesting period from grant date |  |  |  | 5 years |  |
Number of restricted stock units granted (in shares) |  |  | 460,000 |  |  |
Performance Based Restricted Stock Units [Member] | Chief Executive Officer [Member] | Tranche One [Member] |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |
Number of restricted stock units granted (in shares) |  |  | 92,000 |  |  |
Minimum amount of operating income, award vesting condition |  |  | $ 12 |  |  |
Performance Based Restricted Stock Units [Member] | Chief Executive Officer [Member] | Tranche Two [Member] |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |
Number of restricted stock units granted (in shares) |  |  | 92,000 |  |  |
Minimum amount of operating income, award vesting condition |  |  | $ 14 |  |  |
2013 Restricted Stock Plan [Member] | Minimum [Member] |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |
Vesting period from grant date |  |  |  | 4 years |  |
2013 Restricted Stock Plan [Member] | Restricted Stock Units [Member] |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |
Number of common shares reserved for issuance (in shares) |  |  |  |  | 800,000 |
Shares available for future awards (in shares) |  |  |  | 591,138 |  |
2013 Restricted Stock Plan [Member] | Restricted Stock Units [Member] | Maximum [Member] |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |
Number of common shares reserved for issuance (in shares) |  |  |  |  |  | 300,000
2013 Restricted Stock Plan [Member] | Serviced Based Restricted Stock Units [Member] | Non-Employee Director [Member] |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |
Vesting period from grant date |  |  |  | 4 years |  |
Number of restricted stock units granted (in shares) |  | 21,673 |  |  |  |
2013 Restricted Stock Plan [Member] | Serviced Based Restricted Stock Units [Member] | Key Employees [Member] |  |  |  |  |  |
Restricted Stock Plan [Abstract] |  |  |  |  |  |
Number of restricted stock units granted (in shares) | 3,415 |  |  |  |  |

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