Other Income And Other Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
All other income and commissions:
Bank-owned life insurance	$ 5,472		$ 4,772
Bankcard income	4,882		5,615
Other service charges	3,086		3,293
ATM interchange fees	2,384		2,556
Deferred compensation	1,593	[1]	3,119	[1]
Electronic banking fees	1,562		1,706
Letter of credit fees	1,499		1,334
Other	3,457		5,821
Total	23,935		28,216
All other expense:
Litigation and regulatory matters	5,170		153
Advertising and public relations	3,947		4,250
Other insurance and taxes	3,046		3,199
Tax credit investments	2,972		4,608
Travel and entertainment	1,848		1,864
Customer relations	1,278		855
Employee training and dues	1,254		1,092
Supplies	1,055		1,033
Bank examinations costs	828		799
Loan insurance expense	540		589
Federal service fees	282		321
Other	6,327		5,703
Total	$ 28,547		$ 24,466

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