Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Stockholders' Equity Note [Abstract]

Changes in restricted stock units during the year ended December 31, 2023 are as follows:


(in thousands, except weighted average grant date fair value)	Restricted Stock Units	Weighted Average Grant Date Fair Value
Unvested as of January 1, 2023	215	$	48.89
Granted	112	$	43.50
Vested	(110)	$	44.65
Forfeited	(89)	$	49.20
Unvested as of December 31, 2023	128	$	47.34

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

The following additional activity occurred for the Company's restricted stock units:


	Years Ended December 31,
(in millions, except weighted average grant date fair value per award granted)	2023		2022		2021
Weighted average grant date fair value per award	$	43.50	$	47.11	$	77.38
Fair value of awards vested and issued	$	4.8	$	4.7	$	9.3
Tax (expense) benefit for restricted stock compensation expense	$	(0.4)	$	(0.1)	$	3.8

The following additional activity occurred for the Company's performance stock units:


	Years Ended December 31,
(in millions, except weighted average grant date fair value per award granted)	2023		2022		2021
Weighted average grant date fair value per award	$	43.19	$	51.56	$	92.98
Fair value of awards vested and issued	$	1.6	$	1.7	$	4.5
Tax (expense) benefit for performance stock compensation expense	$	(1.0)	$	0.2	$	2.3

Share-based Payment Arrangement, Performance Shares, Activity

Changes in PSUs during the year ended December 31, 2023 are as follows:


(in thousands, except weighted average grant date fair value)	Performance Stock Units	Weighted Average Grant Date Fair Value
Unvested as of January 1, 2023	151	$	61.24
Granted	75	$	43.19
Vested*	(47)	$	51.43
Forfeited	(73)	$	55.53
Unvested as of December 31, 2023	106	$	56.72

* The vested PSUs presented are based on the target amount of the award for the third tranche of the 2020 awards and for the awards that were modified in conjunction with the termination of the Company's previous Chief Executive Officer and the limited overhead restructuring action implemented in February 2023. In accordance with the terms of the underlying award agreements, the actual shares earned and distributed for the performance periods ended during 2023 was 83% of the target shares granted, rounded to the nearest whole share.