LOANS, Amount of Business Lending Loans by Credit Quality Category (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 3,935,998	$ 3,865,576
Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,225,671	1,233,944
Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,539,418	3,418,221
Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,016,340	1,002,854
Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,523,078	2,415,367
Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	396,580	447,355
Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	209,331	231,090
Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	187,249	216,265
Pass [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	952,608	963,338
Pass [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	825,147	818,469
Pass [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	127,461	144,869
Special Mention [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	139,527	125,067
Special Mention [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	108,281	92,739
Special Mention [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	31,246	32,328
Classified [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	120,141	130,167
Classified [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	81,625	90,035
Classified [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	38,516	40,132
Doubtful [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,287	1,611
Doubtful [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,287	1,611
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	12,108	13,761
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	12,108	13,761
Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,509,943	2,403,261
Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	184,564	213,201
Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	13,135	12,106
Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,685	3,064
Consumer Mortgage [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,435,170	1,345,287
Consumer Mortgage [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	92,171	103,128
Consumer Mortgage [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,424,515	1,334,868
Consumer Mortgage [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	89,940	100,443
Consumer Mortgage [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	10,655	10,419
Consumer Mortgage [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,231	2,685
Consumer Indirect [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	657,667	637,357
Consumer Indirect [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,257	10,161
Consumer Indirect [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	657,486	637,284
Consumer Indirect [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,257	10,161
Consumer Indirect [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	181	73
Consumer Indirect [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Consumer Direct [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	160,642	156,266
Consumer Direct [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	11,085	15,208
Consumer Direct [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	160,559	156,187
Consumer Direct [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	11,085	15,208
Consumer Direct [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	83	79
Consumer Direct [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Home Equity [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	269,599	276,457
Home Equity [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	77,736	87,768
Home Equity [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	267,383	274,922
Home Equity [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	77,282	87,389
Home Equity [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,216	1,535
Home Equity [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 454	$ 379