Other Income And Other Expense (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
All other income and commissions:
ATM interchange fees		$ 3,025,000	$ 2,746,000	$ 5,786,000	$ 5,243,000
Letter of credit fees		1,532,000	1,173,000	2,655,000	2,836,000
Electronic banking fees		1,459,000	1,535,000	2,887,000	3,069,000
Deferred compensation	[1]	(35,000)	1,184,000	998,000	1,841,000
Gains/(loss) on extinguishment of debt		0	0	0	(4,350,000)
Other		6,421,000	2,597,000	9,546,000	5,490,000
Total		12,402,000	9,235,000	21,872,000	14,129,000
All other expense:
Other insurance and taxes		3,455,000	3,209,000	6,784,000	6,269,000
Travel and entertainment		2,632,000	2,645,000	4,246,000	4,469,000
Customer relations		1,505,000	1,680,000	2,819,000	2,923,000
Employee training and dues		1,449,000	1,200,000	2,581,000	2,066,000
Supplies		880,000	804,000	1,807,000	1,920,000
Miscellaneous loan costs		734,000	839,000	1,095,000	1,553,000
Tax credit investments		549,000	862,000	944,000	1,187,000
Litigation and regulatory matters		0	(38,200,000)	162,500,000	(38,110,000)
Other		9,307,000	8,902,000	17,730,000	18,147,000
Total		$ 20,511,000	$ (18,059,000)	$ 200,506,000	$ 424,000

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