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Stock Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of Stock Compensation Expense and Related Net Tax Benefits | 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 years ended December 31, 2023, 2022 and 2021:
|  | Year Ended December 31,
($ in thousands) |  | 2023 |  | 2022 |  | 2021
Stock compensation costs |  | $ | 39,867 |  |  | $ | 37,601 |  |  | $ | 32,567 |
Related net tax benefits for stock compensation plans |  | $ | 8,959 |  |  | $ | 5,293 |  |  | $ | 1,760 |
Summary of Activities for Time-Based and Performance-Based Restricted Stock Units | The following table presents a summary of the activities for the Company’s time-based and performance-based RSUs that were settled in shares for the year ended December 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 |  | 515,218 |  |  | $ | 73.13 |  |  | 96,271 |  |  | $ | 79.93 |
Vested |  | (543,032) |  |  | $ | 40.93 |  |  | (152,558) |  |  | $ | 39.79 |
Forfeited |  | (62,534) |  |  | $ | 74.04 |  |  | — |  |  | $ | — |
Outstanding, December 31, 2023 |  | 1,206,518 |  |  | $ | 74.29 |  |  | 276,223 |  |  | $ | 78.59 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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