Shareholders' Equity - Share Repurchase and Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	May 31, 2021	May 31, 2019
Shareholders' Equity
Aggregate cost of common stock repurchased during the period				$ 0.1
Dividend declared per common share (in dollars per share)		$ 0.16
Subsequent Event [Member]
Shareholders' Equity
Dividend declared per common share (in dollars per share)	$ 0.20
May 2019 Repurchase Program
Shareholders' Equity
Amount approved for repurchase of common stock						$ 300.0
Common stock repurchased during the period (in shares)		555,602	2,711,952
Aggregate cost of common stock repurchased during the period		$ 34.5	$ 123.2
May 2021 Repurchase Program
Shareholders' Equity
Amount approved for repurchase of common stock					$ 500.0
Common stock repurchased during the period (in shares)		1,537,217
Aggregate cost of common stock repurchased during the period		$ 118.9
Remaining authorization amount for repurchase of common stock		$ 381.1