Capital Stock - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income (loss) available to common shareholders - Basic	$ 313,030	$ 348,891	$ 597,067	$ (113,694)
Effect of dilutive securities:	238	1,495	2,274	0
Net income (loss) available to common shareholders - Diluted	$ 313,268	$ 350,386	$ 599,341	$ (113,694)
Denominator:
Weighted average basic shares (shares)	235,887,296	232,127,224	232,717,010	206,237,705
Effect of dilutive securities (shares)	4,475,306	33,219,135	14,641,813	0
Weighted average dilutive shares (shares)	240,362,602	265,346,359	247,358,823	206,237,705
Net income (loss) per average share attributable to common stockholders - Basic (usd per share)	$ 1.33	$ 1.50	$ 2.57	$ (0.55)
Net income (loss) per average share attributable to common stockholders - Diluted (usd per share)	$ 1.30	$ 1.32	$ 2.42	$ (0.55)