CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Treasury Stock	Noncontrolling Interest	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-In Capital	Cumulative Effect, Period of Adoption, Adjustment [Member] Accumulated Deficit
Balance at Dec. 31, 2020	$ 607,837	$ 1,014	$ 1,260,900		$ (722,002)		$ 67,925
Balance (in shares) at Dec. 31, 2020		101,392,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions to noncontrolling interest	(21,285)	$ 0	0	0	0		(21,285)
Equity activity of noncontrolling interest from a consolidated variable interest entity	8	0	0	0	0		8
Exercise of stock options, and issuance of common stock units and stock awards, net of repurchase of shares to satisfy tax withholding	(25)	$ 0	(25)	0	0		0
Exercise of stock options, and issuance of common stock units and stock awards, net of repurchase of shares to satisfy tax withholding (in shares)		16
Stock-based compensation	451	$ 0	451	0	0		0
Net income	109,695	0	0	0	94,123		15,572
Balance at Mar. 31, 2021	696,681	$ 1,014	1,261,326		(627,879)		62,220
Balance (in shares) at Mar. 31, 2021		101,408,000
Balance at Dec. 31, 2021	$ 525,935	$ 696	1,264,024		(456,148)	$ (393,829)	111,192	$ (28,123)	$ (65,361)	$ 37,238
Balance (in shares) at Dec. 31, 2021	69,566,000	69,566,000				32,005,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]								Accounting Standards Update 2020-06 [Member]	Accounting Standards Update 2020-06 [Member]	Accounting Standards Update 2020-06 [Member]
Distributions to noncontrolling interest	$ (6,507)	$ 0	0	0	0	$ 0	(6,507)
Fair value of noncontrolling interest in a consolidated variable interest entity	38,471	0	0	0	0	0	38,471
Exercise of stock options, and issuance of common stock units and stock awards, net of repurchase of shares to satisfy tax withholding	214	$ 0	214	0	0	0	0
Exercise of stock options, and issuance of common stock units and stock awards, net of repurchase of shares to satisfy tax withholding (in shares)		28,000
Stock-based compensation	954		620			0	334
Capped call options associated with convertible senior notes due 2028	(16,585)	0	(16,585)	0	0	0	0
Net income	37,858	0	0	0	15,773	0	22,085
Balance at Mar. 31, 2022	$ 552,217	$ 696	$ 1,182,912		$ (403,137)	$ (393,829)	$ 165,575
Balance (in shares) at Mar. 31, 2022	69,594,000	69,594,000				32,005,000