Consolidated Condensed Statements Of Equity (USD $) In Thousands	Controlling Interest [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2009	$ 3,007,303	$ 295,165	$ 3,302,468
Adjustment to reflect adoption of amendments to ASC 810	(10,562)		(10,562)
Net income	35,733	8,563	44,296
Unrealized fair value adjustments, net of tax:
Securities available for sale	(3,089)		(3,089)
Recognized pension and other employee benefit plans net periodic benefit costs	7,339		7,339
Comprehensive income	39,983	8,563	48,546
Preferred stock - (CPP) accretion	12,289		12,289
Preferred stock - (CPP) dividends	(44,784)		(44,784)
Common stock repurchased	(1,340)		(1,340)
Common stock issued related to stock-based compensation arrangements	177		177
Stock-based compensation expense	10,287		10,287
Dividends paid to noncontrolling interest of subsidiary preferred stock		(8,563)	(8,563)
Other changes in equity	(1,630)		(1,630)
Balance at Sep. 30, 2010	3,011,723	295,165	3,306,888
Balance at Dec. 31, 2010	2,382,840	295,165	2,678,005
Net income	96,255	8,563	104,818
Unrealized fair value adjustments, net of tax:
Securities available for sale	33,992		33,992
Recognized pension and other employee benefit plans net periodic benefit costs	10,001		10,001
Comprehensive income	140,248	8,563	148,811
Common stock repurchased	(920)		(920)
Cash dividends declared ($.01/share)	(7,770)		(7,770)
Stock-based compensation expense	9,514		9,514
Dividends paid to noncontrolling interest of subsidiary preferred stock		(8,563)	(8,563)
Repurchase of common stock warrant - CPP	(79,700)		(79,700)
Other changes in equity	3,853		3,853
Balance at Sep. 30, 2011	$ 2,448,065	$ 295,165	$ 2,743,230