Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement [Abstract]

Summary of Nonvested RSU's and Changes During the Period

Nonvested RSU's as of March 31, 2024, and changes during the three months ended March 31, 2024 (unaudited) were as follows:

	Shares			Weighted Average Grant-Date Fair Value
Nonvested as of December 31, 2023		290,787		$	32.89
Granted		158,343			54.00
Vested		(4,694	)		31.96
Nonvested as of March 31, 2024		444,436		$	40.39

Schedule of Stock-Based Compensation Expense

The Company's stock-based compensation expense related to RSU's during the three months ended March 31, 2024 and 2023 (unaudited), which was included in General and administrative expenses within the Condensed Consolidated Statements of Income, was as follows:

	Three Months Ended
(millions)	March 31, 2024		March 31, 2023
Stock-based compensation expense	$	1.4	$	1.1

The Company's stock-based compensation expense related to PSU's during the three months ended March 31, 2024 and 2023 (unaudited), which was included in General and administrative expenses within the Condensed Consolidated Statements of Income, was as follows:

	Three Months Ended
(millions)	March 31, 2024		March 31, 2023
Stock-based compensation expense	$	0.9	$	1.1