Earnings Per Share (Schedule Of Reconciliation Of Net Income/(Loss) to Net Income/(Loss) Available to Common Shareholders) (Details) - USD ($)		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income/(loss)		$ 52,213,000	$ (72,405,000)
Net income attributable to noncontrolling interest		2,851,000	2,758,000
Net income/(loss) attributable to controlling interest		49,362,000	(75,163,000)
Preferred stock dividends		1,550,000	1,550,000
Net income/(loss) available to common shareholders		$ 47,812,000	$ (76,713,000)
Weighted average common shares outstanding - basic		234,651,000	232,816,000
Effect of dilutive securities	[1]	2,015,000	0
Weighted average common shares outstanding - diluted		236,666,000	232,816,000
Net income/(loss) per share available to common shareholders		$ 0.2	$ (0.33)
Diluted income/(loss) per share available to common shareholders		$ 0.2	$ (0.33)

[1] (a) For the three months ended March 31, 2015 all potential common shares were antidilutive due to the net loss available to common shareholders.