LOANS, Amount of Business Lending Loans by Credit Quality Category (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 3,861,601	$ 3,865,576
Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,222,835	1,233,944
Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,442,528	3,418,221
Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,004,572	1,002,854
Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,437,956	2,415,367
Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	419,073	447,355
Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	218,263	231,090
Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	200,810	216,265
Pass [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	954,648	963,338
Pass [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	818,639	818,469
Pass [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	136,009	144,869
Special Mention [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	132,210	125,067
Special Mention [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	101,301	92,739
Special Mention [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	30,909	32,328
Classified [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	121,255	130,167
Classified [Member] | Legacy Loan [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	83,345	90,035
Classified [Member] | Acquired Loans [Member] | Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	37,910	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	13,435	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	13,435	13,761
Performing [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,425,345	2,403,261
Performing [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	197,550	213,201
Nonperforming [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	12,611	12,106
Nonperforming [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,260	3,064
Consumer Mortgage [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,382,702	1,345,287
Consumer Mortgage [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,382,702	1,345,287
Consumer Mortgage [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	97,490	103,128
Consumer Mortgage [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	97,490	103,128
Consumer Mortgage [Member] | Performing [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,372,297	1,334,868
Consumer Mortgage [Member] | Performing [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	94,898	100,443
Consumer Mortgage [Member] | Nonperforming [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	10,405	10,419
Consumer Mortgage [Member] | Nonperforming [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,592	2,685
Consumer Indirect [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	631,440	637,357
Consumer Indirect [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	631,440	637,357
Consumer Indirect [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	8,120	10,161
Consumer Indirect [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	8,120	10,161
Consumer Indirect [Member] | Performing [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	631,249	637,284
Consumer Indirect [Member] | Performing [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	8,096	10,161
Consumer Indirect [Member] | Nonperforming [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	191	73
Consumer Indirect [Member] | Nonperforming [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	24	0
Consumer Direct [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	152,917	156,266
Consumer Direct [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	152,917	156,266
Consumer Direct [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	12,732	15,208
Consumer Direct [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	12,732	15,208
Consumer Direct [Member] | Performing [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	152,863	156,187
Consumer Direct [Member] | Performing [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	12,721	15,208
Consumer Direct [Member] | Nonperforming [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	54	79
Consumer Direct [Member] | Nonperforming [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	11	0
Home Equity [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	270,897	276,457
Home Equity [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	270,897	276,457
Home Equity [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	82,468	87,768
Home Equity [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	82,468	87,768
Home Equity [Member] | Performing [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	268,936	274,922
Home Equity [Member] | Performing [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	81,835	87,389
Home Equity [Member] | Nonperforming [Member] | Legacy Loan [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,961	1,535
Home Equity [Member] | Nonperforming [Member] | Acquired Loans [Member] | All Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 633	$ 379