Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Stockholders' Equity Note [Abstract]

Changes in Restricted Stock Units

Changes in restricted stock units during the year ended December 31, 2022 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, 2022	187	$	48.88
Granted	147	$	47.11
Vested	(108)	$	45.87
Forfeited	(11)	$	52.06
Unvested as of December 31, 2022	215	$	48.89

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)	2022		2021		2020
Weighted average grant date fair value per award	$	47.11	$	77.38	$	34.99
Fair value of awards vested and issued	$	4.7	$	9.3	$	3.8
Tax (expense) benefit for restricted stock compensation expense	$	(0.1)	$	3.8	$	(0.4)

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)	2022		2021		2020
Weighted average grant date fair value per award	$	51.56	$	92.98	$	34.66
Fair value of awards vested and issued	$	1.7	$	4.5	$	—
Tax benefit for performance stock compensation expense	$	0.2	$	2.3	$	—

Share-based Payment Arrangement, Performance Shares, Activity

Changes in PSUs during the year ended December 31, 2022 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, 2022	99	$	63.16
Granted	87	$	51.56
Vested*	(25)	$	34.78
Forfeited	(10)	$	63.13
Unvested as of December 31, 2022	151	$	61.24

* The vested PSUs presented are based on the target amount of the award for the second tranche of the 2020 awards. In accordance with the terms of the underlying award agreements, the actual shares earned and distributed for the two-year performance period ended during 2022 was 121% of the target shares granted, rounded up the nearest whole share.