CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest Income
Interest and fees on loans	$ 291,889	$ 257,316	$ 218,530
Interest and dividends on investments:
Taxable interest	29,773	31,264	28,608
Interest exempt from federal income taxes	1,591	1,646	1,622
Dividends	1,608	1,859	1,669
Interest on bank deposits	403	172	121
Total interest income	325,264	292,257	250,550
Interest Expense
Interest on deposits	36,725	21,713	9,415
Interest on short-term borrowings	8,298	10,741	8,799
Interest on subordinated debentures	9,084	6,987	3,000
Interest on other long-term debt	1,016	300	323
Interest Expense, Lessee, Assets under Capital Lease	279	294	233
Total interest expense	55,402	40,035	21,770
Net Interest Income	269,862	252,222	228,780
Provision for credit losses	14,533	12,531	5,087
Net Interest Income after Provision for Credit Losses	255,329	239,691	223,693
Noninterest Income
Net securities gains	22	8,102	5,040
Trust income	8,321	7,901	7,098
Service charges on deposit accounts	18,926	18,175	18,579
Insurance and retail brokerage commissions	7,583	7,426	8,807
Income from bank owned life insurance	6,002	6,686	5,699
Gain on sale of mortgage loans	7,765	5,436	5,366
Gain on sale of other loans and assets	(4,793)	(5,273)	(1,753)
Card related interchange income	21,677	20,187	18,780
Derivative, Gain (Loss) on Derivative, Net	(269)	787	(473)
Swap Fee Income	3,397	1,874	2,005
Other income	7,268	6,790	7,677
Total noninterest income	85,485	88,637	80,331
Noninterest Expense
Salaries and employee benefits	112,237	105,115	103,714
Net occupancy	18,923	17,219	15,648
Furniture and equipment	15,160	14,247	13,508
Data processing	10,692	10,470	9,090
Advertising and promotion	4,250	3,956	3,786
Pennsylvania shares tax	4,602	4,875	4,209
Intangible amortization	3,344	3,217	3,081
Collection and repossession	2,204	2,762	1,905
Other professional fees and services	4,631	4,473	4,761
FDIC insurance	1,219	2,007	3,210
Asset Impairment Charges	1,724	1,080	1,834
Litigation and operational losses	1,687	1,162	2,050
Merger and acquisition related	3,536	1,637	10,213
Other operating expenses	25,756	23,336	23,289
Total noninterest expense	209,965	195,556	200,298
Income before income taxes	130,849	132,772	103,726
Income tax provision	25,516	25,274	48,561
Net Income	$ 105,333	$ 107,498	$ 55,165
Average Shares Outstanding (in shares)	98,317,787	99,036,163	95,220,056
Average Shares Outstanding Assuming Dilution (in shares)	98,588,164	99,223,513	95,331,037
Per Share Data:
Basic Earnings Per Share (in dollars per share)	$ 1.07	$ 1.09	$ 0.58
Diluted Earnings Per Share (in dollars per share)	1.07	1.08	0.58
Cash Dividends Declared per Common Share (in dollars per share)	$ 0.40	$ 0.35	$ 0.32