Stock Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2021

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 (deficiencies) associated with the Company’s various employee share-based compensation plans for the years ended December 31, 2021, 2020 and 2019:

($ in thousands)	Year Ended December 31,
	2021		2020		2019
Stock compensation costs	$	32,567	$	29,237	$	30,761
Related net tax benefits (deficiencies) for stock compensation plans	$	1,760	$	(1,839)	$	4,792

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- and performance-based RSUs that will be settled in shares for the year ended December 31, 2021. The number of outstanding performance-based RSUs provided below assumes that performance will be met at the 100% target level.

	Time-Based RSUs			Performance-Based RSUs
	Shares	Weighted- Average Grant Date Fair Value		Shares	Weighted- Average Grant Date Fair Value
Outstanding, January 1, 2021	1,345,635	$	50.22	398,057	$	53.66
Granted	417,900	71.88		91,960	77.67
Vested	(301,800)	66.85		(120,286)	70.13
Forfeited	(131,789)	56.26		—	—
Outstanding, December 31, 2021	1,329,946	$	52.65	369,731	$	54.28

Summary of time-based RSU's that will be settled in cash

The following table presents a summary of the activities for the Company’s time-based RSUs that will be settled in cash for the year ended December 31, 2021:

	Shares
Outstanding, January 1, 2021	21,802
Granted	24,073
Vested	—
Forfeited	(13,228)
Outstanding, December 31, 2021	32,647