Other Income And Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
All other income and commissions:
Other service charges	$ 3,728	$ 3,109	$ 8,076	$ 6,093
ATM and interchange fees	3,413	3,083	6,680	5,861
Dividend income	3,124	0	5,373	0
Mortgage banking	2,431	1,268	4,977	2,529
Letter of credit fees	1,295	1,122	2,544	2,158
Electronic banking fees	1,228	1,306	2,432	2,629
Deferred compensation	991	1,491	1,442	3,318
Insurance commissions	476	592	1,233	1,475
Other	2,748	2,646	9,920	4,945
Total	19,434	14,617	42,677	29,008
All other expense:
Travel and entertainment	5,131	3,162	8,114	5,510
Other insurance and taxes	2,752	2,443	5,417	4,833
Supplies	1,987	1,093	3,823	1,956
Employee training and dues	1,849	1,453	3,628	2,996
Non-service components of net periodic pension and post-retirement cost	1,530	851	2,034	1,328
Customer relations	1,358	1,543	2,421	2,879
Tax credit investments	1,079	942	2,216	1,884
Miscellaneous loan costs	1,035	699	2,177	1,321
OREO	810	446	918	650
Litigation and regulatory matters	16	533	2,150	241
Other	33,452	12,051	53,433	20,843
Total	$ 50,999	$ 25,216	$ 86,331	$ 44,441