Stock-Based Compensation - Restricted Stock Activity (Details) - Restricted Stock - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Shares
Balance at the beginning of the period (in shares)	1,018,020	1,082,844
Granted (in shares)	210,222	291,832	439,633
Vested (in shares)	(399,362)	(352,585)
Forfeited (in shares)	(5,407)	(4,071)
Balance at the end of the period (in shares)	823,473	1,018,020	1,082,844
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 70.03	$ 56.26
Granted (in dollars per share)	146.48	100.53
Vested (in dollars per share)	58.62	53.07
Forfeited (in dollars per share)	87.40	62.91
Balance at the end of the period (in dollars per share)	$ 94.98	$ 70.03	$ 56.26
Aggregate Intrinsic Value
Balance at the end of the period	$ 132.2	$ 117.0