Other Income And Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
All other income and commissions:
Other service charges	$ 5,124	$ 2,984
ATM and interchange fees	3,267	2,778
Dividend income	2,249	0
Mortgage banking	1,770	1,261
Letter of credit fees	1,249	1,036
Electronic banking fees	1,204	1,323
Insurance commissions	757	883
Deferred compensation	451	1,827
Other	7,172	2,299
Total	23,243	14,391
All other expense:
Travel and entertainment	2,983	2,348
Other insurance and taxes	2,665	2,390
Litigation and regulatory matters	2,134	(292)
Supplies	1,836	863
Employee training and dues	1,779	1,543
Miscellaneous loan costs	1,142	622
Tax credit investments	1,137	942
Customer relations	1,063	1,336
Non-service components of net periodic pension and post-retirement cost	504	477
OREO	108	204
Other	19,981	8,792
Total	$ 35,332	$ 19,225