Equity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity, Class of Treasury Stock [Line Items]
Dividends declared per common share (in usd per share)	$ 0.20	$ 0.20	$ 0.20
Dividend equivalents paid on outstanding restricted stock units	$ 1.4	$ 1.1	$ 1.3
Restricted stock units
Equity, Class of Treasury Stock [Line Items]
Restricted stock units vested and issued as common stock (in shares)	1,891,362	1,863,885
Repurchased shares for award (in shares)	814,020	764,529
Average repurchase price of shares for award (in usd per share)	$ 15.16	$ 19.42
Common stock
Equity, Class of Treasury Stock [Line Items]
Repurchased common stock (in shares)	2,041,179	489,704
Average repurchase price of common stock (in usd per share)	$ 16.06	$ 17.18