Other Income And Other Expense (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
All other income and commissions:
ATM interchange fees		$ 2,879	$ 3,025	$ 5,837	$ 5,786
Electronic banking fees		1,381	1,459	2,778	2,887
Letter of credit fees		1,115	1,532	2,176	2,655
Deferred compensation	[1]	795	(35)	1,124	998
Mortgage banking		598	376	1,871	1,960
Other		2,005	6,421	5,076	9,546
Total		8,773	12,778	18,862	23,832
All other expense:
Litigation and regulatory matters		26,000	0	25,525	162,500
Travel and entertainment		2,495	2,632	4,557	4,246
Customer relations		1,483	1,505	3,362	2,819
Employee training and dues		1,338	1,449	2,728	2,581
Supplies		930	880	1,956	1,807
Tax credit investments		831	549	1,537	944
Miscellaneous loan costs		565	734	1,282	1,095
Other		10,624	9,307	22,343	17,730
Total		$ 44,266	$ 17,056	$ 63,290	$ 193,722

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