Other Income And Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
All other income and commissions:
Other service charges	$ 5,624	$ 3,728	$ 9,493	$ 7,851
ATM and interchange fees	4,262	3,413	7,503	6,680
Mortgage banking	2,572	2,431	4,458	4,977
Deferred compensation	1,938	991	7,412	1,442
Dividend income	1,809	3,124	4,122	5,373
Electronic banking fees	1,267	1,228	2,538	2,432
Letter of credit fees	1,253	1,295	2,621	2,544
Insurance commissions	566	476	1,190	1,233
Gain/(loss) on extinguishment of debt	0	0	(1)	0
Other	6,376	2,188	10,962	9,235
Total	25,667	18,874	50,298	41,767
All other expense:
Travel and entertainment	2,906	5,131	5,618	8,114
Other insurance and taxes	2,495	2,752	5,189	5,417
Customer relations	1,540	1,358	3,139	2,421
Supplies	1,342	1,987	3,146	3,823
Employee training and dues	1,251	1,849	2,708	3,628
Miscellaneous loan costs	857	1,035	1,884	2,177
Non-service components of net periodic pension and post-retirement cost	559	1,530	991	2,034
Tax credit investments	267	1,079	942	2,216
OREO	25	810	(341)	918
Litigation and regulatory matters	(8,230)	16	(8,217)	2,150
Other	26,199	33,452	33,938	53,433
Total	29,211	50,999	48,997	86,331
Non-Strategic
All other income and commissions:
Total	629	$ (336)	1,580	$ 314
All other expense:
Litigation and regulatory matters	$ 8,300		$ 8,300