Stock Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2020

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 (deficiencies) benefits associated with the Company’s various employee share-based compensation plans for the three months ended March 31, 2020 and 2019:

($ in thousands)	Three Months Ended March 31,
	2020			2019
Stock compensation costs	$	7,209		$	7,444
Related net tax (deficiencies) benefits for stock compensation plans	$	(1,566	)	$	4,707

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, 2020. The number of outstanding performance-based RSUs stated below assumes the associated performance targets will be met at the 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, 2020	1,139,868		$	57.78	386,483		$	60.13
Granted	606,327		41.76		165,084		39.79
Vested	(250,160	)	54.47		(131,597	)	56.59
Forfeited	(22,182	)	52.82		—		—
Outstanding, March 31, 2020	1,473,853		$	51.83	419,970		$	53.24

The following table presents a summary of the activities for the Company’s time-based RSUs that will be settled in cash for the three months ended March 31, 2020:

	Shares
Outstanding, January 1, 2020	11,638
Granted	5,639
Vested	(600	)
Forfeited	—
Outstanding, March 31, 2020	16,677