Stock Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement [Abstract]

Summary of Stock Compensation Expense and Related Net Tax (Deficiency) Benefit

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, 2024 and 2023:

	Three Months Ended March 31,
($ in thousands)	2024		2023
Stock compensation costs	$	12,988	$	11,075
Related net tax benefits for stock compensation plans	$	783	$	8,290

Summary of Activity for Time-Based and Performance-Based Restricted Stock Units

The following table presents a summary of the activities for the Company’s time- and performance-based RSUs that were settled in shares for the three months ended March 31, 2024. 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, 2024	1,206,518	$	74.29	276,223	$	78.59
Granted	515,235	75.79		97,798	80.28
Vested	(299,381)	71.68		(91,960)	77.67
Forfeited	(12,163)	75.24		—	—
Outstanding, March 31, 2024	1,410,209	$	75.39	282,061	$	79.48