Consolidated Condensed Statements Of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest and dividend income:
Interest and fees on loans	$ 64,402	$ 59,908
Interest and dividends on:
Obligations of U.S. Government, its agencies and other securities	6,767	7,138
Interest Income, Securities, State and Municipal	2,174	1,460
Other interest income	371	249
Total interest and dividend income	73,714	68,755
Interest on deposits:
Demand and savings deposits	3,290	1,614
Time deposits	2,551	2,161
Interest on borrowings:
Short-term borrowings	575	235
Long-term debt	2,448	5,793
Total interest expense	8,864	9,803
Net interest income	64,850	58,952
Provision for loan losses	260	876
Net interest income after provision for loan losses	64,590	58,076
Other income:
Income from fiduciary activities	6,395	5,514
Service charges on deposit accounts	2,922	3,139
Other service income	4,172	2,804
Checkcard fee income	4,002	3,761
Bank owned life insurance income	1,009	1,103
ATM Fees	524	542
OREO valuation adjustments	(207)	(73)
Gain on sale of OREO, net	4,321	100
Gain (Loss) on Sale of Investments	(2,271)	0
Unrealized gain loss on equity securities	3,489	0
Other components of net periodic benefit income	1,705	1,448
Other	842	617
Total other income	26,903	18,955
Other expense:
Salaries and employee benefits	25,320	22,717
Employee Benefits and Share-based Compensation	7,029	6,468
Occupancy expense	2,936	2,635
Furniture and equipment expense	4,149	3,618
Data processing fees	1,773	1,965
Professional fees and services	6,190	4,829
Marketing	1,218	1,056
Insurance	1,428	1,570
Communication	1,250	1,333
Excise and Sales Taxes	1,105	1,063
Other expense	1,910	1,656
Total other expense	54,308	48,910
Income before income taxes	37,185	28,121
Income taxes	6,062	7,854
Net income	31,123	20,267
Net income available to common shareholders	$ 31,123	$ 20,267
Net income available to common shareholders
Basic	$ 2.04	$ 1.32
Diluted	$ 2.02	$ 1.31
Weighted average common shares outstanding
Basic	15,288,332	15,312,059
Diluted	15,431,328	15,432,769
Cash dividends declared	$ 0.94	$ 0.94