Condensed Consolidated Statements of Changes in Equity Statement - USD ($) $ in Thousands		Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total Equity	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2018			0	85,928,127		456,540
Beginning balance at Dec. 31, 2018		$ 870,981	$ 0	$ 864	$ 1,405,392	$ (19,485)	$ 157	$ (517,727)	$ 869,201	$ 1,780
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation		42,387			42,387				42,387
Net issuances under equity incentive plans, net of tax (in shares)				1,067,916
Net issuances under equity incentive plans, net of tax		(10,935)		$ 10	(10,945)				(10,935)
Employee stock purchase plan (ESPP) purchase shares (in shares)				163,970
Employee stock purchase plan (ESPP) purchase shares		2,412		$ 2	2,410				2,412
Net unrealized gain (loss) on securities available for sale, net of tax		1,173					1,156		1,156	17
Dividends paid and return of capital to noncontrolling interests		(1,165)								(1,165)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		(30,532)						(30,596)	(30,596)	64
Ending balance (in shares) at Jun. 30, 2019			0	87,160,013		456,540
Ending balance at Jun. 30, 2019		874,321	$ 0	$ 876	1,439,244	$ (19,485)	1,313	(548,323)	873,625	696
Beginning balance (in shares) at Mar. 31, 2019			0	86,384,050		456,540
Beginning balance at Mar. 31, 2019		865,874	$ 0	$ 868	1,420,838	$ (19,485)	225	(537,662)	864,784	1,090
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation		22,274			22,274				22,274
Net issuances under equity incentive plans, net of tax (in shares)				611,993
Net issuances under equity incentive plans, net of tax		(6,272)		$ 6	(6,278)				(6,272)
Employee stock purchase plan (ESPP) purchase shares (in shares)				163,970
Employee stock purchase plan (ESPP) purchase shares		2,412		$ 2	2,410				2,412
Net unrealized gain (loss) on securities available for sale, net of tax		1,105					1,088		1,088	17
Dividends paid and return of capital to noncontrolling interests		(440)								(440)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		(10,632)						(10,661)	(10,661)	29
Ending balance (in shares) at Jun. 30, 2019			0	87,160,013		456,540
Ending balance at Jun. 30, 2019		874,321	$ 0	$ 876	1,439,244	$ (19,485)	1,313	(548,323)	873,625	696
Beginning balance (in shares) at Dec. 31, 2019			0	88,757,406		461,391
Beginning balance at Dec. 31, 2019		900,187	$ 0	$ 892	1,467,882	$ (19,550)	(565)	(548,472)	900,187	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation		35,211			35,211				35,211
Net issuances under equity incentive plans, net of tax (in shares)	[1]			1,744,210		5,658
Net issuances under equity incentive plans, net of tax	[1]	(5,477)		$ 17	(5,423)	$ (71)			(5,477)
Issuance of preferred stock in exchange for common stock (in shares)	[2]		195,627	(19,562,781)
Issuance of preferred stock in exchange for common stock	[2]	(50,204)	$ 2	$ (196)	194			(50,204)	(50,204)
Retirement of treasury stock		(19,600)		$ (4)	(19,617)	$ 19,621
Retirement of treasury stock (in shares)				(467,049)		(467,049)
Net unrealized gain (loss) on securities available for sale, net of tax		(7,017)					(7,017)		(7,017)	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		(126,558)						(126,558)	(126,558)	0
Ending balance (in shares) at Jun. 30, 2020			195,627	70,938,835		0
Ending balance at Jun. 30, 2020		746,142	$ 2	$ 709	1,478,247	$ 0	(7,582)	(725,234)	746,142	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment of deemed dividend due to beneficial conversion feature		50,200
Beginning balance (in shares) at Mar. 31, 2020			195,628	69,869,214		0
Beginning balance at Mar. 31, 2020		796,546	$ 2	$ 699	1,463,535	$ 0	(20,927)	(646,763)	796,546	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation		15,512			15,512				15,512
Net issuances under equity incentive plans, net of tax (in shares)	[1]			1,069,521
Net issuances under equity incentive plans, net of tax	[1]	(790)		$ 10	(800)				(790)
Issuance of preferred stock in exchange for common stock (in shares)			(1)	100
Net unrealized gain (loss) on securities available for sale, net of tax		13,345					13,345		13,345
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		(78,471)						(78,471)	(78,471)
Ending balance (in shares) at Jun. 30, 2020			195,627	70,938,835		0
Ending balance at Jun. 30, 2020		$ 746,142	$ 2	$ 709	$ 1,478,247	$ 0	$ (7,582)	$ (725,234)	$ 746,142	$ 0

[1] Includes shares that were transferred to the Company to satisfy payment of all or a portion of the exercise price in connection with the exercise of stock options.

[2] Includes a payment of $50.2 million that was recorded as a deemed dividend within accumulated deficit related to the beneficial conversion feature of the Series A Preferred Stock issued on March 20, 2020, which would convert into common stock upon a sale by the preferred stockholder to a third party. See “Note 14. Stockholders' Equity” for additional information.