Other Income And Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
All other income and commissions:
Other service charges	$ 3,109	$ 2,996	$ 6,093	$ 5,709
ATM interchange fees	3,083	2,879	5,861	5,837
Deferred compensation	1,491	795	3,318	1,124
Electronic banking fees	1,306	1,381	2,629	2,778
Mortgage banking	1,268	598	2,529	1,871
Letter of credit fees	1,122	1,115	2,158	2,176
Insurance commissions	592	552	1,475	1,039
Other	2,646	2,005	4,945	5,076
Total	14,617	12,321	29,008	25,610
All other expense:
Travel and entertainment	3,162	2,495	5,510	4,557
Other insurance and taxes	2,443	3,014	4,833	6,327
Customer relations	1,543	1,483	2,879	3,362
Employee training and dues	1,453	1,338	2,996	2,728
Supplies	1,093	930	1,956	1,956
Tax credit investments	942	831	1,884	1,537
Miscellaneous loan costs	699	565	1,321	1,282
Litigation and regulatory matters	533	26,000	241	25,525
Foreclosed real estate	446	(432)	650	(690)
Other	12,090	10,624	20,921	22,343
Total	$ 24,404	$ 46,848	$ 43,191	$ 68,927