Other Income And Other Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
All other income and commissions:
Bankcard income	$ 5,303		$ 5,298		$ 15,484		$ 16,618
Other service charges	3,707		3,263		10,296		9,768
Bank-owned life insurance	3,560		4,293		12,978		13,724
ATM interchange fees	2,680		2,579		7,691		7,804
Deferred compensation	2,160	[1]	1,966	[1]	3,475	[1]	4,065	[1]
Electronic banking fees	1,607		1,589		4,754		4,927
Letter of credit fees	1,171		1,072		3,866		3,966
Other	3,996		6,280		11,230		16,535
Total	24,184		26,340		69,774		77,407
All other expense:
Advertising and public relations	5,486		4,121		13,554		11,524
Other insurance and taxes	3,215		1,327		9,337		7,656
Tax credit investments	3,079		5,635		9,040		14,457
Travel and entertainment	2,400		2,009		6,620		6,308
Employee training and dues	1,244		1,032		3,727		3,354
Customer relations	1,204		1,027		3,737		3,230
Supplies	950		881		2,710		2,731
Bank examinations costs	819		816		2,476		2,415
Loan insurance expense	490		578		1,533		1,803
Federal service fees	276		323		840		972
Litigation and regulatory matters	229		6,760		6,299		29,013
Other	7,376		5,478		18,926		25,108
Total	$ 26,768		$ 29,987		$ 78,799		$ 108,571

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