CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning Balance at Dec. 31, 2020	$ 2,016,059	$ 2,710	$ 2,902,236	$ 472,014	$ 5,412	$ (1,366,313)
Beginning Balance (in shares) at Dec. 31, 2020		271,029
Net loss	(106,413)			(106,413)
Foreign currency translation adjustment	418				418
Vesting of restricted stock units		$ 2	(2)
Vesting of restricted stock units (in shares)		163
Stock-based compensation	5,891		5,891
Payment of cash dividends	(3,754)			(3,754)
Dividend equivalents	(55)			(55)
Ending Balance at Mar. 31, 2021	1,912,146	$ 2,712	2,908,125	361,792	5,830	(1,366,313)
Ending Balance (in shares) at Mar. 31, 2021		271,192
Beginning Balance at Dec. 31, 2021	$ 1,609,487	$ 2,993	3,171,536	(198,316)	5,915	(1,372,641)
Beginning Balance (in shares) at Dec. 31, 2021	299,268,967	299,269
Net loss	$ (28,777)			(28,777)
Foreign currency translation adjustment	115				115
Vesting of restricted stock units		$ 1	(1)
Vesting of restricted stock units (in shares)		150
Stock-based compensation	4,642		4,642
Payment of cash dividends	(8,611)			(8,611)
Dividend equivalents	(144)			(144)
Purchase of treasury stock	(13)					13
Ending Balance at Mar. 31, 2022	$ 1,576,699	$ 2,994	$ 3,176,177	$ (235,848)	$ 6,030	$ (1,372,654)
Ending Balance (in shares) at Mar. 31, 2022	299,418,814	299,419