Stock-Based Compensation and Other Benefit Plans - Stock Options - Narratives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement [Abstract]
Granted (in shares)	1,327,795	3,000,000
Number of stock options vested (in shares)	100,000	0
Number of stock options forfeited (in shares)	556,497	0	0
Unrecognized compensation cost related to stock options	$ 3.6