EARNINGS PER COMMON SHARE (DETAILS) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Basic earnings per common share
Net income	$ 73,371	$ 202,259	$ 239,197	$ 350,729
Less: Amounts attributable to noncontrolling interests	0	1,573	0	2,795
Less: preferred share dividends	10,022	10,022	20,044	20,044
Net income available to common shareholders	$ 63,349	$ 190,664	$ 219,153	$ 327,890
Weighted average common shares outstanding - basic	100,274	105,118	100,093	107,075
Basic earnings per common share	$ 0.63	$ 1.81	$ 2.19	$ 3.06
Diluted earnings per common share
Net income available to common shareholders	$ 63,349	$ 190,664	$ 219,153	$ 327,890
Weighted average common shares outstanding - basic	100,274	105,118	100,093	107,075
Stock compensation plans	886	1,171	1,058	1,254
Weighted average common shares outstanding - diluted	101,160	106,289	101,151	108,329
Diluted earnings per common share	$ 0.63	$ 1.79	$ 2.17	$ 3.03
Anti-dilutive shares excluded from the dilutive computation	89	73	329	562