Earnings Per Share - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Interest expense attributable to antidilutive convertible notes excluded from computation of earnings per share		$ 18.1	$ 18.0
Antidilutive convertible notes excluded from computation of earnings per share (in shares)	13,717,782		13,670,796
Deferred debt issuance cost, accretion period		5 years
Deferred debt issuance cost, adjustments		$ 0.1
Antidilutive securities excluded from computation of earnings per share, additional warrants, number (in shares)		1,100,000