Stock Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Stock Compensation Expense and Related Net Tax 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, 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

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-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