Net Earnings Per Common Share (Basic And Diluted Net Earnings Per Common Share Based On The Weighted Average Outstanding Shares) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss) applicable to controlling interest	$ (41,472)	$ 111,514	$ 83,026	$ 110,723					$ 263,791	$ 349,516	$ 323,804
Less common and preferred dividends, Basic									6,094	(178,277)	(177,775)
Undistributed earnings (loss), Basic									269,885	171,239	146,029
Less undistributed earnings applicable to nonvested restricted shares, Basic									2,832	1,600	1,300
Undistributed earnings (loss) applicable to nonvested shares, Basic									267,053	169,639	144,729
Distributed earnings applicable to common shares, Basic									23,916	7,321	7,292
Net earnings (loss) applicable to common shareholders									290,969	176,960	152,021
Weighted average common shares outstanding									183,844	183,081	182,393
Net earnings (loss) per common share, Basic	$ (0.32)	$ 1.13	$ 0.30	$ 0.48	$ 0.19	$ 0.34	$ 0.30	$ 0.14	$ 1.58	$ 0.97	$ 0.83
Additional undistributed earnings allocated to incremental shares, Diluted									0	0	41
Diluted earnings (loss) applicable to common shares, Diluted									290,969	176,960	152,062
Additional weighted average dilutive shares, Diluted									453	155	212
Weighted average diluted common shares outstanding, Diluted									184,297	183,236	182,605
Net earnings (loss) per common share, Diluted	$ (0.32)	$ 1.12	$ 0.30	$ 0.48	$ 0.19	$ 0.34	$ 0.30	$ 0.14	$ 1.58	$ 0.97	$ 0.83
Stock Redeemed or Called During Period, Value									799,468	(1,542,500)
Retained Earnings [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock Redeemed or Called During Period, Value									$ (125,700)	$ (3,830)