LOANS, Credit Quality By Past Due Status (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Aged analysis of the company's loans [Abstract]
Total Loans		$ 4,313,547	$ 4,236,206
Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		20,504	17,676
Total Past Due		46,638	54,940
Current		4,028,757	3,908,458
Total Loans		4,075,395	3,963,398
Legacy Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		24,258	34,436
Legacy Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		1,876	2,828
Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		2,629	3,055
Total Past Due		4,888	6,721
Current		228,589	260,775
Acquired Impaired	[1]	4,675	5,312
Total Loans		238,152	272,808
Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		2,060	3,388
Acquired Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		199	278
Consumer Mortgage [Member] | Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		1,562,089	1,544,401
Consumer Mortgage [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		59,773	68,983
Business Lending [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		1,288,772	1,262,484
Business Lending [Member] | Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		1,167,952	1,124,594
Business Lending [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		120,820	137,890
Consumer Indirect [Member] | Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		872,414	832,745
Consumer Indirect [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		574	1,223
Consumer Direct [Member] | Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		180,618	178,585
Consumer Direct [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		3,861	5,443
Home Equity [Member] | Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		292,322	283,073
Home Equity [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		53,124	59,269
Residential Portfolio Segment [Member] | Consumer Mortgage [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		1,621,862	1,613,384
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		12,108	13,201
Total Past Due		23,574	29,344
Current		1,538,515	1,515,057
Total Loans		1,562,089	1,544,401
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Legacy Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		10,115	13,978
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Legacy Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		1,351	2,165
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		1,473	2,122
Total Past Due		2,874	4,246
Current		56,899	64,737
Acquired Impaired	[1]	0	0
Total Loans		59,773	68,983
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		1,271	1,892
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Acquired Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		130	232
Commercial Portfolio Segment [Member] | Business Lending [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		1,288,772	1,262,484
Commercial Portfolio Segment [Member] | Business Lending [Member] | Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		6,402	2,291
Total Past Due		8,724	9,379
Current		1,159,228	1,115,215
Total Loans		1,167,952	1,124,594
Commercial Portfolio Segment [Member] | Business Lending [Member] | Legacy Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		2,187	6,738
Commercial Portfolio Segment [Member] | Business Lending [Member] | Legacy Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		135	350
Commercial Portfolio Segment [Member] | Business Lending [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		710	489
Total Past Due		902	1,097
Current		115,243	131,481
Acquired Impaired	[1]	4,675	5,312
Total Loans		120,820	137,890
Commercial Portfolio Segment [Member] | Business Lending [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		192	608
Commercial Portfolio Segment [Member] | Business Lending [Member] | Acquired Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		0	0
Consumer Portfolio Segment [Member] | Consumer Indirect [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		872,988	833,968
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		0	10
Total Past Due		9,843	10,621
Current		862,571	822,124
Total Loans		872,414	832,745
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Legacy Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		9,785	10,529
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Legacy Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		58	82
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		0	0
Total Past Due		25	40
Current		549	1,183
Acquired Impaired	[1]	0	0
Total Loans		574	1,223
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		25	40
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Acquired Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		0	0
Consumer Portfolio Segment [Member] | Consumer Direct [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		184,479	184,028
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		1	2
Total Past Due		1,190	1,427
Current		179,428	177,158
Total Loans		180,618	178,585
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Legacy Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		1,148	1,389
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Legacy Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		41	36
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		14	18
Total Past Due		140	192
Current		3,721	5,251
Acquired Impaired	[1]	0	0
Total Loans		3,861	5,443
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		126	174
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Acquired Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		0	0
Consumer Portfolio Segment [Member] | Home Equity [Member]
Aged analysis of the company's loans [Abstract]
Total Loans		345,446	342,342
Consumer Portfolio Segment [Member] | Home Equity [Member] | Legacy Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		1,993	2,172
Total Past Due		3,307	4,169
Current		289,015	278,904
Total Loans		292,322	283,073
Consumer Portfolio Segment [Member] | Home Equity [Member] | Legacy Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		1,023	1,802
Consumer Portfolio Segment [Member] | Home Equity [Member] | Legacy Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		291	195
Consumer Portfolio Segment [Member] | Home Equity [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Nonaccrual		432	426
Total Past Due		947	1,146
Current		52,177	58,123
Acquired Impaired	[1]	0	0
Total Loans		53,124	59,269
Consumer Portfolio Segment [Member] | Home Equity [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total Past Due		446	674
Consumer Portfolio Segment [Member] | Home Equity [Member] | Acquired Loans [Member] | 90+ Days Past Due [Member]
Aged analysis of the company's loans [Abstract]
90 + Days Past Due and Still Accruing		$ 69	$ 46

[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.