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, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net income/(loss)	$ 58,388	$ 52,213
Net income attributable to noncontrolling interest	2,820	2,851
Net income/(loss) attributable to controlling interest	55,568	49,362
Preferred stock dividends	1,550	1,550
Net income/(loss) available to common shareholders	$ 54,018	$ 47,812
Weighted average common shares outstanding - basic	233,076	234,651
Effect of dilutive securities	3,779	2,015
Weighted average common shares outstanding - diluted	236,855	236,666
Net income/(loss) per share available to common shareholders	$ 0.23	$ 0.2
Diluted income/(loss) per share available to common shareholders	$ 0.23	$ 0.2