LOANS, Credit Quality By Past Due Status (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Aged analysis of the company's loans [Abstract]
Total Loans	$ 4,163,911		$ 4,236,206
Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	23,544		34,436
90 + Days Past Due and Still Accruing	1,325		2,828
Nonaccrual	18,278		17,676
Total Past Due	43,147		54,940
Current	3,858,109		3,908,458
Total Loans	3,901,256		3,963,398
Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	3,120		3,388
90 + Days Past Due and Still Accruing	374		278
Nonaccrual	2,706		3,055
Total Past Due	6,200		6,721
Acquired Impaired	5,280	[1]	5,312	[1]
Current	251,175		260,775
Total Loans	262,655		272,808
Consumer Mortgage [Member]
Aged analysis of the company's loans [Abstract]
Total Loans	1,605,019		1,613,384
Consumer Mortgage [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	9,841		13,978
90 + Days Past Due and Still Accruing	1,105		2,165
Nonaccrual	13,467		13,201
Total Past Due	24,413		29,344
Current	1,514,128		1,515,057
Total Loans	1,538,541		1,544,401
Consumer Mortgage [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	1,671		1,892
90 + Days Past Due and Still Accruing	210		232
Nonaccrual	1,974		2,122
Total Past Due	3,855		4,246
Acquired Impaired	0	[1]	0	[1]
Current	62,623		64,737
Total Loans	66,478		68,983
Business Lending [Member]
Aged analysis of the company's loans [Abstract]
Total Loans	1,239,529		1,262,484
Business Lending [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	4,779		6,738
90 + Days Past Due and Still Accruing	90		350
Nonaccrual	2,731		2,291
Total Past Due	7,600		9,379
Current	1,099,128		1,115,215
Total Loans	1,106,728		1,124,594
Business Lending [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	939		608
90 + Days Past Due and Still Accruing	0		0
Nonaccrual	300		489
Total Past Due	1,239		1,097
Acquired Impaired	5,280	[1]	5,312	[1]
Current	126,282		131,481
Total Loans	132,801		137,890
Consumer Indirect [Member]
Aged analysis of the company's loans [Abstract]
Total Loans	804,300		833,968
Consumer Indirect [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	6,419		10,529
90 + Days Past Due and Still Accruing	51		82
Nonaccrual	0		10
Total Past Due	6,470		10,621
Current	796,892		822,124
Total Loans	803,362		832,745
Consumer Indirect [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	29		40
90 + Days Past Due and Still Accruing	0		0
Nonaccrual	0		0
Total Past Due	29		40
Acquired Impaired	0	[1]	0	[1]
Current	909		1,183
Total Loans	938		1,223
Consumer Direct [Member]
Aged analysis of the company's loans [Abstract]
Total Loans	176,084		184,028
Consumer Direct [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	863		1,389
90 + Days Past Due and Still Accruing	29		36
Nonaccrual	2		2
Total Past Due	894		1,427
Current	170,276		177,158
Total Loans	171,170		178,585
Consumer Direct [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	80		174
90 + Days Past Due and Still Accruing	0		0
Nonaccrual	18		18
Total Past Due	98		192
Acquired Impaired	0	[1]	0	[1]
Current	4,816		5,251
Total Loans	4,914		5,443
Home Equity [Member]
Aged analysis of the company's loans [Abstract]
Total Loans	338,979		342,342
Home Equity [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	1,642		1,802
90 + Days Past Due and Still Accruing	50		195
Nonaccrual	2,078		2,172
Total Past Due	3,770		4,169
Current	277,685		278,904
Total Loans	281,455		283,073
Home Equity [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	401		674
90 + Days Past Due and Still Accruing	164		46
Nonaccrual	414		426
Total Past Due	979		1,146
Acquired Impaired	0	[1]	0	[1]
Current	56,545		58,123
Total Loans	$ 57,524		$ 59,269

[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.