Other Income And Other Expense (Details) (USD $)	3 Months Ended					6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Mar. 31, 2010	Jun. 30, 2011		Jun. 30, 2010
Other Income And Other Expense
Bankcard income	$ 5,151,000		$ 5,271,000			$ 9,871,000		$ 9,819,000
Bank owned life insurance	4,920,000		5,784,000			9,735,000		12,253,000
ATM interchange fees	3,791,000		3,232,000			7,326,000		6,889,000
Other service charges	2,821,000		2,382,000			5,675,000		4,765,000
Letter of credit fees	1,869,000		1,802,000			3,645,000		3,441,000
Electronic banking fees	1,536,000		1,887,000			3,070,000		3,612,000
Deferred compensation	221,000		(771,000)			1,200,000		239,000
Gains on extinguishment of debt						5,761,000		17,060,000
Other	9,722,000		6,866,000			16,067,000		14,493,000
Other income, total	30,031,000		26,453,000			62,350,000		72,571,000
Loss accruals from litigation and regulatory matters	38,260,000		1,270,000			40,585,000		1,270,000
Low income housing expense	4,973,000		5,364,000			9,670,000		10,830,000
Advertising and public relations	3,631,000		5,574,000			7,493,000		10,824,000
Other insurance and taxes	3,511,000		3,589,000			6,986,000		6,742,000
Travel and entertainment	2,178,000		2,627,000			3,979,000		4,998,000
Employee training and dues	1,350,000		965,000			2,601,000		2,407,000
Customer relations	1,155,000		1,838,000			2,425,000		3,805,000
Bank examinations costs	1,117,000		1,142,000			2,235,000		2,284,000
Supplies	801,000		1,083,000			1,782,000		2,231,000
Loan insurance expense	706,000	[1]	682,000	[1]		1,487,000	[1]	(2,192,000)	[1]
Federal service fees	291,000		712,000			755,000		1,619,000
Other	17,026,000	[2]	(1,839,000)	[2]		22,827,000	[2]	5,923,000	[2]
Other expenses, total	74,999,000		23,007,000			102,825,000		50,741,000
Cancellation of contract, premiums returned					3,800,000
Termination of technology services contract charge	9,000,000
Contingent liability, expense reversal			$ 5,000,000

[1] First quarter 2010 includes the cancellation of an HLTV insurance contract and return of $3.8 million of premiums.

[2] Second quarter 2011 includes $9.0 million charge to terminate a technology services contract. Second quarter 2010 includes $5.0 million expense reversal related to the Visa contingent liability.