CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Common stock held in treasury	Additional paid-in capital	Retained deficit	Accumulated other comprehensive loss
Beginning balance at Dec. 31, 2020	$ 1,637,535	$ 2,563	$ (30,132)	$ 5,684,268	$ (4,018,685)	$ (479)
Beginning balance Shares at Dec. 31, 2020		256,354,000
Issuance of common stock	(7,621)	$ 33	0	(7,654)	0	0
Issuance of common stock, shares		3,205,000
Issuance of common stock upon vesting of PSUs	0	$ 0	0	148	(148)	0
Issuance of common stock upon vesting of PSUs, shares		13,000
Stock-based compensation expense	6,713	$ 0	0	6,713	0	0
Treasury stock	0	0	47	(47)	0	0
Other comprehensive income	70	0	0		0	70
Net (loss) income	27,151	0	0	0	27,151	0
Ending balance at Mar. 31, 2021	1,663,848	$ 2,596	(30,085)	5,683,428	(3,991,682)	(409)
Ending balance Shares at Mar. 31, 2021		259,572,000
Beginning balance at Dec. 31, 2020	1,637,535	$ 2,563	(30,132)	5,684,268	(4,018,685)	(479)
Beginning balance Shares at Dec. 31, 2020		256,354,000
Ending balance at Dec. 31, 2021	$ 2,085,663	$ 2,598	(30,007)	5,720,277	(3,607,055)	(150)
Ending balance Shares at Dec. 31, 2021	259,795,554	259,796,000
Issuance of common stock	$ (21,247)	$ 29	0	(21,276)	0	0
Issuance of common stock, shares		2,980,000
Issuance of common stock upon vesting of PSUs	0	$ 0	0	78	(78)	0
Issuance of common stock upon vesting of PSUs, shares		2,000
Stock-based compensation expense	8,619	$ 0	0	8,619	0	0
Treasury stock	(16,198)	0	(16,152)	(46)	0	0
Other comprehensive income	75	0	0	0	0	75
Net (loss) income	(456,808)	0	0	0	(456,808)	0
Ending balance at Mar. 31, 2022	$ 1,600,104	$ 2,627	$ (46,159)	$ 5,707,652	$ (4,063,941)	$ (75)
Ending balance Shares at Mar. 31, 2022	262,777,606	262,778,000