Net Income (Loss) Per Share - Schedule of Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ 636,167	$ (21,190)	$ (168,402)	$ (91,913)	$ (79,238)	$ (13,329)	$ 446,575	$ (184,480)
Shares used in computation of per share amounts - basic (in shares)	174,460			168,109			173,409	163,428
Dilutive potential common shares (in shares)	7,417			0			7,530	0
Shares used in computation of per share amounts - diluted (in shares)	181,877			168,109			180,939	163,428
Net income (loss) per share - basic (in dollars per share)	$ 3.65			$ (0.55)			$ 2.58	$ (1.13)
Net income (loss) per share - diluted (in dollars per share)	$ 3.50			$ (0.55)			$ 2.47	$ (1.13)