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STOCKHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2021
Equity [Abstract] |
Summary of Stock Option Activity | A summary of stock option activity is as follows:
| Stock Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value
Outstanding, December 31, 2020 | 90 |  |  | $ | 8.91 |  |  |  |  |
Granted | 8 |  |  | $ | 68.78 |  |  |  |  |
Exercised | (21) |  |  | $ | 8.03 |  |  |  |  |
Forfeited or expired | — |  |  | $ | — |  |  |  |  |
Outstanding, December 31, 2021 | 77 |  |  | $ | 15.68 |  |  | 4.4 |  | $ | 5,366 |
Exercisable, December 31, 2021 | 69 |  |  | $ | 9.18 |  |  | 3.8 |  | $ | 5,227 |
Summary of Restricted Stock, Restricted Stock Unit and Performance Stock Unit Activity | A summary of restricted stock, restricted stock unit and performance stock unit activity is as follows:
| Restricted Stock, Restricted Stock Units, and Performance Stock Units (1) |  | Weighted Average Grant Price |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value
Outstanding, December 31, 2020 | 307 |  |  | $ | 41.55 |  |  |  |  |
Granted | 108 |  |  | $ | 67.65 |  |  |  |  |
Class A common stock vested | (157) |  |  | $ | 37.03 |  |  |  |  |
Forfeited or canceled | (9) |  |  | $ | 51.11 |  |  |  |  |
Outstanding, December 31, 2021 | 249 |  |  | $ | 55.40 |  |  | 1.7 |  | $ | 21,282 |
Unvested, December 31, 2021 | 417 |  |  | $ | 56.44 |  |  | 1.6 |  | $ | 35,602 |
(1)Market-based performance stock unit grants are included at 100%. Attainment of maximum performance targets and market achievements would result in the issuance of an additional 168 shares of Class A common stock currently included in unvested. The market-based performance stock unit grants that vested in fiscal year 2021 resulted in the issuance of 98 additional shares of Class A common stock.
Accumulated Other Comprehensive Income (Loss) | The changes in the balances of each component of accumulated other comprehensive loss, net of tax are as follows:
|  |  | Interest Rate Swaps |  |  |  |
Balance as of December 31, 2018 |  |  | $ | (1,308) |  |  |  |  |
Other comprehensive loss before reclassifications |  |  | (5,286) |  |  |  |  |
Amounts reclassified from accumulated other comprehensive loss |  |  | 553 |  |  |  |  |
Other comprehensive loss |  |  | (4,733) |  |  |  |  |
Balance as of December 31, 2019 |  |  | (6,041) |  |  |  |  |
Other comprehensive loss before reclassifications |  |  | (11,184) |  |  |  |  |
Amounts reclassified from accumulated other comprehensive loss |  |  | 3,679 |  |  |  |  |
Income tax benefit related to items in other comprehensive loss |  |  | 2,029 |  |  |  |  |
Other comprehensive loss |  |  | (5,476) |  |  |  |  |
Balance as of December 31, 2020 |  |  | (11,517) |  |  |  |  |
Other comprehensive income before reclassifications |  |  | 3,737 |  |  |  |  |
Amounts reclassified from accumulated other comprehensive loss |  |  | 4,763 |  |  |  |  |
Income tax provision related to items in other comprehensive income |  |  | (2,086) |  |  |  |  |
Other comprehensive income |  |  | 6,414 |  |  |  |  |
Balance as of December 31, 2021 |  |  | $ | (5,103) |  |  |  |  |
Reclassification Out of Accumulated Other Comprehensive Income (Loss) | A summary of reclassifications out of accumulated other comprehensive loss, net of tax for fiscal years 2021, 2020 and 2019 is as follows:
| Fiscal Year Ended December 31, |  |
| 2021 |  | 2020 |  | 2019 |  |
Details About Accumulated Other Comprehensive Loss, Net of Tax Components | Amounts Reclassified Out of Accumulated Other Comprehensive Loss, Net of Tax |  | Affected Line Item in the Consolidated Statements of Operations
Interest rate swaps | $ | 4,763 |  |  | $ | 3,679 |  |  | $ | 115 |  |  | Interest expense
| 4,763 |  |  | 3,679 |  |  | 115 |  |  | Income before income taxes
| (1,142) |  |  | (2,029) |  |  | — |  |  | Provision (benefit) for income taxes
| $ | 5,905 |  |  | $ | 5,708 |  |  | $ | 115 |  |  | Net income

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