Earnings (Loss) per Share - Calculation of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator:
Numerator for basic EPS - Net income (loss)	$ 130,428	$ 273,877	$ 148,662	$ (11,988)
Effect of dilutive securities:
Interest expense associated with convertible debt instruments	8,485	30,195	8,986	0
Numerator for diluted EPS - net income (loss) available to common stockholders after the effect of dilutive securities	138,913	304,072	157,648	(11,988)
Numerator for diluted EPS - net income (loss) available to common stockholders after the effect of dilutive securities	$ 138,913	$ 304,072	$ 157,648	$ (11,988)
Denominator:
Denominator for basic EPS - weighted average number of shares of common stock outstanding (in shares)	103,829	94,834	103,337	94,461
Effect of dilutive securities:
Convertible debt instruments (in shares)	15,537	22,279	12,293	0
Dilutive potential common shares (in shares)	18,263	25,098	15,303	0
Denominator for diluted EPS - adjusted weighted-average number of shares of common stock outstanding after the effect of dilutive securities (in shares)	122,092	119,932	118,640	94,461
Earnings (loss) per share:
Basic (in usd per share)	$ 1.26	$ 2.89	$ 1.44	$ (0.13)
Diluted (in usd per share)	$ 1.14	$ 2.54	$ 1.33	$ (0.13)
Employee stock options
Effect of dilutive securities:
Incremental common shares attributable to dilutive effect of share-based payment award (in shares)	4	31	9	0
Restricted stock units
Effect of dilutive securities:
Incremental common shares attributable to dilutive effect of share-based payment award (in shares)	2,722	2,788	3,001	0