LOANS, Credit Quality By Past Due Status (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Aged analysis of the company's loans [Abstract]
Total Loans	$ 4,236,206		$ 4,109,083
Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	34,436		35,689
90 + Days Past Due and Still Accruing	2,828		2,418
Nonaccrual	17,676		16,065
Total Past Due	54,940		54,172
Current	3,908,458		3,717,703
Total Loans	3,963,398		3,771,875
Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	3,388		3,522
90 + Days Past Due and Still Accruing	278		137
Nonaccrual	3,055		3,408
Total Past Due	6,721		7,067
Acquired Impaired	5,312	[1]	7,090	[1]
Current	260,775		323,051
Total Loans	272,808		337,208
Consumer Mortgage [Member]
Aged analysis of the company's loans [Abstract]
Total Loans	1,613,384		1,582,058
Consumer Mortgage [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	13,978		16,589
90 + Days Past Due and Still Accruing	2,165		1,253
Nonaccrual	13,201		11,097
Total Past Due	29,344		28,939
Current	1,515,057		1,473,320
Total Loans	1,544,401		1,502,259
Consumer Mortgage [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	1,892		1,857
90 + Days Past Due and Still Accruing	232		85
Nonaccrual	2,122		1,463
Total Past Due	4,246		3,405
Acquired Impaired	0	[1]	0	[1]
Current	64,737		76,394
Total Loans	68,983		79,799
Business Lending [Member]
Aged analysis of the company's loans [Abstract]
Total Loans	1,262,484		1,260,364
Business Lending [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	6,738		2,960
90 + Days Past Due and Still Accruing	350		164
Nonaccrual	2,291		3,083
Total Past Due	9,379		6,207
Current	1,115,215		1,079,818
Total Loans	1,124,594		1,086,025
Business Lending [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	608		531
90 + Days Past Due and Still Accruing	0		0
Nonaccrual	489		1,472
Total Past Due	1,097		2,003
Acquired Impaired	5,312	[1]	7,090	[1]
Current	131,481		165,246
Total Loans	137,890		174,339
Consumer Indirect [Member]
Aged analysis of the company's loans [Abstract]
Total Loans	833,968		740,002
Consumer Indirect [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	10,529		11,647
90 + Days Past Due and Still Accruing	82		738
Nonaccrual	10		14
Total Past Due	10,621		12,399
Current	822,124		723,878
Total Loans	832,745		736,277
Consumer Indirect [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	40		157
90 + Days Past Due and Still Accruing	0		17
Nonaccrual	0		0
Total Past Due	40		174
Acquired Impaired	0	[1]	0	[1]
Current	1,183		3,551
Total Loans	1,223		3,725
Consumer Direct [Member]
Aged analysis of the company's loans [Abstract]
Total Loans	184,028		180,139
Consumer Direct [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	1,389		1,858
90 + Days Past Due and Still Accruing	36		90
Nonaccrual	2		4
Total Past Due	1,427		1,952
Current	177,158		169,452
Total Loans	178,585		171,404
Consumer Direct [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	174		385
90 + Days Past Due and Still Accruing	0		27
Nonaccrual	18		0
Total Past Due	192		412
Acquired Impaired	0	[1]	0	[1]
Current	5,251		8,323
Total Loans	5,443		8,735
Home Equity [Member]
Aged analysis of the company's loans [Abstract]
Total Loans	342,342		346,520
Home Equity [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	1,802		2,635
90 + Days Past Due and Still Accruing	195		173
Nonaccrual	2,172		1,867
Total Past Due	4,169		4,675
Current	278,904		271,235
Total Loans	283,073		275,910
Home Equity [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	674		592
90 + Days Past Due and Still Accruing	46		8
Nonaccrual	426		473
Total Past Due	1,146		1,073
Acquired Impaired	0	[1]	0	[1]
Current	58,123		69,537
Total Loans	$ 59,269		$ 70,610

[1] Acquired impaired loans were not classified as nonperforming assets as the loans are considered to be performing under ASC 310-30. As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cashflows, is being recognized on all acquired impaired loans.