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Stock Compensation Plans | 3 Months Ended
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Mar. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Stock Compensation Plans | Stock Compensation PlansPursuant to the Company’s 2021 Stock Incentive Plan, as amended, the Company may issue stock, stock options, restricted stock, restricted stock units (“RSUs”) including performance-based RSUs, stock purchase warrants, stock appreciation rights, phantom stock and dividend equivalents to eligible employees, non-employee directors, consultants, and other service providers of the Company and its subsidiaries. The Company has granted RSUs as its primary incentive awards. There were no outstanding awards other than RSUs as of both March 31, 2023 and December 31, 2022. The following table presents a summary of the total share-based compensation expense and the related net tax benefits associated with the Company’s various employee share-based compensation plans for the three months ended March 31, 2023 and 2022:
|  |  |  |  |  |  | Three Months Ended March 31,
($ in thousands) |  |  |  |  |  |  |  |  | 2023 |  | 2022
Stock compensation costs |  |  |  |  |  |  |  |  | $ | 11,075 |  |  | $ | 8,433 |
Related net tax benefits for stock compensation plans |  |  |  |  |  |  |  |  | $ | 8,290 |  |  | $ | 5,159 |
Restricted Stock Units — RSUs are granted under the Company’s long-term incentive plan at no cost to the recipient. RSUs generally cliff vest after three years of continued employment from the date of the grant, and are authorized to settle in shares of the Company’s common stock. Dividends are accrued during the vesting period and paid at the time of vesting. While a portion of RSUs are time-based vesting awards, others vest subject to the attainment of specified performance goals, referred to as “performance-based RSUs.” Performance-based RSUs are granted annually upon approval by the Company’s Compensation Committee based on the performance in the year prior to the grant date of the award. The number of awards that vest can range from zero to a maximum of 200% of the granted number of awards based on the Company’s achievement of specified performance criteria over a performance period of three years. For accounting on stock-based compensation plans, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Stock-Based Compensation to the Consolidated Financial Statements of the Company’s 2022 Form 10-K. The following table presents a summary of the activities for the Company’s time-based and performance-based RSUs that will be settled in shares for the three months ended March 31, 2023. The number of performance-based RSUs stated below reflects the number of awards granted on the grant date.
|  |  |  |  |  | Time-Based RSUs |  | Performance-Based RSUs
|  |  |  |  |  |  |  |  |  | Shares |  | Weighted-Average Grant Date Fair Value |  | Shares |  | Weighted-Average Grant Date Fair Value
Outstanding, January 1, 2023 |  |  |  |  |  |  |  |  |  | 1,296,866 |  |  | $ | 60.77 |  |  | 332,510 |  |  | $ | 60.40 |
Granted |  |  |  |  |  |  |  |  |  | 479,758 |  |  | 74.53 |  |  | 96,271 |  |  | 57.50 |
Vested |  |  |  |  |  |  |  |  |  | (462,248) |  |  | 42.35 |  |  | (152,558) |  |  | 39.39 |
Forfeited |  |  |  |  |  |  |  |  |  | (9,280) |  |  | 70.26 |  |  | — |  |  | — |
Outstanding, March 31, 2023 |  |  |  |  |  |  |  |  |  | 1,305,096 |  |  | $ | 72.28 |  |  | 276,223 |  |  | $ | 70.99 |
As of March 31, 2023, there were $41.8 million of unrecognized compensation costs related to unvested time-based RSUs expected to be recognized over a weighted-average period of 2.2 years, and $24.1 million of unrecognized compensation costs related to unvested performance-based RSUs expected to be recognized over a weighted-average period of 2.3 years.

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