CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Income
Interest and fees on loans	$ 171,196	$ 176,129	$ 187,258
Interest and dividends on investments:
Taxable interest	28,767	29,916	31,695
Interest exempt from federal income taxes	311	4	12
Dividends	1,895	302	104
Interest on bank deposits	12	7	6
Total interest income	202,181	206,358	219,075
Interest Expense
Interest on deposits	12,453	15,596	21,454
Interest on short-term borrowings	2,449	1,262	1,070
Interest on subordinated debentures	2,292	3,128	5,684
Interest on other long-term debt	1,307	1,721	1,938
Total interest expense	18,501	21,707	30,146
Net Interest Income	183,680	184,651	188,929
Provision for credit losses	11,196	19,227	20,544
Net Interest Income after Provision for Credit Losses	172,484	165,424	168,385
Noninterest Income
Net securities gains (losses)	550	(1,158)	192
Trust income	6,000	6,166	6,206
Service charges on deposit accounts	15,661	15,652	14,743
Insurance and retail brokerage commissions	6,483	6,005	6,272
Bank Owned Life Insurance Income	5,502	5,539	5,850
Gain on sale of assets	4,996	2,153	4,607
Card related interchange income	14,222	13,746	13,199
Other income	7,445	12,060	14,365
Total noninterest income	60,859	60,163	65,434
Noninterest Expense
Salaries and employee benefits	87,223	86,012	86,069
Net occupancy expense	13,119	13,607	13,255
Furniture and equipment expense	17,812	15,118	12,460
Data processing expense	6,124	6,009	7,054
Marketing and Advertising Expense	2,953	3,129	4,157
Contributions	1,431	784	1,195
Pennsylvania shares tax expense	3,776	5,638	5,706
Intangible amortization	631	1,064	1,467
Collection and repossession expense	2,754	3,836	5,756
Other professional fees and services	3,986	3,731	4,329
FDIC insurance	4,054	4,366	5,032
Loss on sale or write-down of assets	1,595	1,054	7,394
Litigation and operational losses	6,786	1,115	4,367
Loss on early redemption of subordinated debt	0	1,629	0
Conversion related expenses	1,788	2,588	0
Other operating expenses	17,178	19,144	18,966
Total noninterest expense	171,210	168,824	177,207
Income before income taxes	62,133	56,763	56,612
Income tax provision	17,680	15,281	14,658
Net Income	$ 44,453	$ 41,482	$ 41,954
Average Shares Outstanding (in shares)	93,114,654	97,028,157	103,885,396
Average Shares Outstanding Assuming Dilution (in shares)	93,114,654	97,029,832	103,885,663
Per Share Data:
Basic Earnings Per Share (in dollars per share)	$ 0.48	$ 0.43	$ 0.40
Diluted Earnings Per Share (in dollars per share)	$ 0.48	$ 0.43	$ 0.40
Cash Dividends Declared per Common Share (in dollars per share)	$ 0.28	$ 0.23	$ 0.18