Earnings Per Share (Information Related to EPS Calculation) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income (loss)
Net income (loss)	$ 164,002	$ 30,043	$ 4,817	$ 75,296
Net (income) loss attributable to noncontrolling interests	(24,292)	(285)	(24,325)	(240)
Net income (loss) attributable to common stockholders	$ 139,710	$ 29,758	$ (19,508)	$ 75,056
Shares
Weighted-average common shares outstanding - basic (in shares)	55,542	43,134	51,493	43,118
Restricted stock and stock options (in shares)	43	208	0	171
Warrants (in shares)	0	86	0	86
Weighted-average common shares outstanding - diluted (in shares)	55,585	43,428	51,493	43,375
Net income (loss) per common share
Basic income (loss) per share (in dollars per share)	$ 2.52	$ 0.69	$ (0.38)	$ 1.74
Diluted income (loss) per share (in dollars per share)	$ 2.51	$ 0.69	$ (0.38)	$ 1.73