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Stock Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2024
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, 2024, 2023 and 2022:
Year Ended December 31,
($ in thousands)202420232022
Stock compensation costs$45,535 $39,867 $37,601 
Related net tax benefits for stock compensation plans$997 $8,959 $5,293 
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, 2024. The number of performance-based RSUs stated below reflects the number of awards granted on the grant date:
Time-Based RSUsPerformance-Based RSUs
SharesWeighted-Average Grant Date Fair ValueSharesWeighted-Average Grant Date Fair Value
Outstanding, January 1, 2024
1,206,518 $74.29 276,223 $78.59 
Granted553,398 $76.44 97,798 $80.28 
Vested(329,468)$72.05 (91,960)$77.67 
Forfeited(81,836)$74.53 — $— 
Outstanding, December 31, 2024
1,348,612 $75.70 282,061 $79.48