Other Income And Other Expense (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
All other income and commissions:
ATM interchange fees	$ 2,761,000		$ 2,497,000
Electronic banking fees	1,428,000		1,534,000
Letter of credit fees	1,123,000		1,663,000
Deferred compensation	1,033,000	[1]	657,000	[1]
Gains Losses On Extinguishment Of Debt	0		(4,350,000)
Other	3,125,000		2,893,000
Total	9,470,000		4,894,000
All other expense:
Litigation and regulatory matters	162,500,000		90,000
Other insurance and taxes	3,329,000		3,060,000
Travel and entertainment	1,614,000		1,824,000
Customer relations	1,314,000		1,243,000
Employee training and dues	1,132,000		866,000
Supplies	927,000		1,116,000
Tax credit investments	395,000		325,000
Miscellaneous loan costs	361,000		714,000
Other	8,423,000		9,245,000
Total	$ 179,995,000		$ 18,483,000

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