LOANS, Amount of Business Lending Loans by Credit Quality Category (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 4,217,244	$ 4,109,083
Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,251,178	1,260,364
Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,931,311	3,771,875
Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,107,652	1,086,025
Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,823,659	2,685,850
Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	285,933	337,208
Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	143,526	174,339
Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	142,407	162,869
Pass [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,022,794	1,025,156
Pass [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	927,154	908,885
Pass [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	95,640	116,271
Special Mention [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	124,920	117,864
Special Mention [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	104,353	93,600
Special Mention [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	20,567	24,264
Classified [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	97,977	110,093
Classified [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	76,145	83,379
Classified [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	21,832	26,714
Doubtful [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	161
Doubtful [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	161
Doubtful [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Impaired [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,487	7,090
Acquired Impaired [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Acquired Impaired [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,487	7,090
Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,806,873	2,670,614
Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	139,672	160,796
Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	16,786	15,236
Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,735	2,073
Consumer Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,598,298	1,582,058
Consumer Mortgage [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,526,146	1,502,259
Consumer Mortgage [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	72,152	79,799
Consumer Mortgage [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,511,844	1,489,909
Consumer Mortgage [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	70,066	78,251
Consumer Mortgage [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	14,302	12,350
Consumer Mortgage [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,086	1,548
Consumer Indirect [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	841,975	740,002
Consumer Indirect [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	840,395	736,277
Consumer Indirect [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,580	3,725
Consumer Indirect [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	840,269	735,525
Consumer Indirect [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,580	3,708
Consumer Indirect [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	126	752
Consumer Indirect [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	17
Consumer Direct [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	186,672	180,139
Consumer Direct [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	180,388	171,404
Consumer Direct [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,284	8,735
Consumer Direct [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	180,366	171,310
Consumer Direct [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,266	8,708
Consumer Direct [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	22	94
Consumer Direct [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	18	27
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	339,121	346,520
Home Equity [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	276,730	275,910
Home Equity [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	62,391	70,610
Home Equity [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	274,394	273,870
Home Equity [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	61,760	70,129
Home Equity [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,336	2,040
Home Equity [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 631	$ 481