Other Income And Other Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Other Income And Other Expense [Abstract]
Bankcard income	$ 5,705		$ 5,151		$ 11,320		$ 9,871
Bank-owned life insurance	4,659		4,920		9,431		9,735
Other service charges	3,212		2,819		6,505		5,672
Deferred compensation	(1,020)	[1]	221	[1]	2,099	[1]	1,200	[1]
ATM interchange fees	2,669		3,791		5,225		7,326
Electronic banking fees	1,632		1,536		3,338		3,070
Letter of credit fees	1,560		1,869		2,894		3,645
Gains on extinguishment of debt			0		0		5,761
Other	4,434		7,427		10,255		11,726
Low income housing expense	4,214		4,973		8,822		9,670
Advertising and public relations	3,153		3,558		7,403		7,348
Other insurance and taxes	3,130		3,507		6,329		6,974
Travel and entertainment	2,435		2,137		4,299		3,907
Employee training and dues	1,230		1,342		2,322		2,589
Supplies	817		792		1,850		1,755
Customer relations	1,348		1,152		2,203		2,422
Bank examinations costs	800		1,117		1,599		2,235
Loan insurance expense	636		706		1,225		1,487
Federal service fees	328		291		649		755
Losses from litigation and regulatory matters	22,100		38,260		22,253		40,585
Other	$ 13,927		$ 16,904		$ 19,630		$ 22,595

[1] Deferred compensation market value adjustments are mirrored by adjustments to employee compensation, incentives, and benefits expense.