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
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income/(loss)	$ 94,994	$ 58,388
Net income attributable to noncontrolling interest	2,820	2,820
Net income/(loss) attributable to controlling interest	92,174	55,568
Preferred stock dividends	1,550	1,550
Net income/(loss) available to common shareholders	$ 90,624	$ 54,018
Weighted average common shares outstanding - basic (in shares)	326,489	233,076
Effect of dilutive securities (in shares)	3,855	3,779
Weighted average common shares outstanding - diluted (in shares)	330,344	236,855
Net income/(loss) per share available to common shareholders (in dollars per share)	$ 0.28	$ 0.23
Diluted income/(loss) per share available to common shareholders (in dollars per share)	$ 0.27	$ 0.23