CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical)	Dec. 31, 2021	Jan. 07, 2021	Dec. 31, 2020	May 31, 2020	May 29, 2020	May 18, 2020	Mar. 31, 2018
3.75% Convertible Senior Notes
Interest rate (as a percent)	3.75%		3.75%	3.75%	3.75%	3.75%	3.75%
5.5% Convertible Senior Notes
Interest rate (as a percent)	5.50%	5.50%	5.50%				5.50%