Basis Of Presentation (Effect On Consolidated Condensed Statements Of Income) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Provision for loan losses	$ 12,516	$ 13,250	$ 26,616	$ 29,800
Net interest income after provision for loan losses	57,506	55,471	112,719	106,301
OREO devaluations	(3,355)	(1,919)	(5,890)	(3,064)
Total other income	15,138	16,647	30,168	33,357
Income before income taxes	40,999	28,632	71,531	56,586
Income taxes	12,046	7,466	20,382	14,641
Net income	28,953	21,166	51,149	41,945
Net income available to common shareholders	27,489	19,715	48,221	39,042
Basic	$ 1.79	$ 1.30	$ 3.13	$ 2.60
Diluted	$ 1.79	$ 1.30	$ 3.13	$ 2.60
As Previously Reported [Member]
Provision for loan losses	23,900		37,400
Net interest income after provision for loan losses	46,122		101,935
OREO devaluations	(5,257)		(9,651)
Total other income	13,236		26,407
Income before income taxes	27,713		56,986
Income taxes	7,396		15,291
Net income	20,317		41,695
Net income available to common shareholders	18,853		38,767
Basic	$ 1.22		$ 2.52
Diluted	$ 1.22		$ 2.52
Effect Of Change [Member]
Provision for loan losses	(11,384)		(10,784)
Net interest income after provision for loan losses	11,384		10,784
OREO devaluations	1,902		3,761
Total other income	1,902		3,761
Income before income taxes	13,286		14,545
Income taxes	4,650		5,091
Net income	8,636		9,454
Net income available to common shareholders	$ 8,636		$ 9,454
Basic	$ 0.57		$ 0.61
Diluted	$ 0.57		$ 0.61