Earnings Per Share -Schedule Of Reconciliation Of Net Income/(Loss) to Net Income/(Loss) Available to Common Shareholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income/(loss)	$ 274,716	$ 71,769	$ 455,702	$ 225,361
Net income attributable to noncontrolling interest	2,883	2,883	8,555	8,555
Net income/(loss) attributable to controlling interest	271,833	68,886	447,147	216,806
Preferred stock dividends	1,550	1,550	4,650	4,650
Net income/(loss) available to common shareholders	$ 270,283	$ 67,336	$ 442,497	$ 212,156
Weighted average common shares outstanding - basic (in shares)	324,406	233,749	325,341	233,438
Effect of dilutive securities (in shares)	2,846	2,591	3,304	2,934
Weighted average common shares outstanding - diluted (in shares)	327,252	236,340	328,645	236,372
Net income/(loss) per share available to common shareholders (in dollars per share)	$ 0.83	$ 0.29	$ 1.36	$ 0.91
Diluted income/(loss) per share available to common shareholders (in dollars per share)	$ 0.83	$ 0.28	$ 1.35	$ 0.90