LOANS, Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for loan losses [Roll Forward]
Balance, beginning of period	$ 44,319	$ 42,888
Charge-offs	(11,815)	(11,831)
Recoveries	5,659	5,270
Provision	7,178	7,992	9,108
Balance, end of period	45,341	44,319	42,888
Consumer Mortgage [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	8,994	7,070
Charge-offs	(1,075)	(1,012)
Recoveries	205	36
Provision	2,162	2,900
Balance, end of period	10,286	8,994
Business Lending [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	17,507	18,013
Charge-offs	(1,558)	(2,788)
Recoveries	750	692
Provision	(912)	1,590
Balance, end of period	15,787	17,507
Home Equity [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	1,830	1,451
Charge-offs	(765)	(650)
Recoveries	85	20
Provision	1,551	1,009
Balance, end of period	2,701	1,830
Consumer Indirect [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	10,248	9,606
Charge-offs	(6,784)	(4,544)
Recoveries	3,773	3,488
Provision	4,307	1,698
Balance, end of period	11,544	10,248
Consumer Direct [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	3,181	3,303
Charge-offs	(1,595)	(1,954)
Recoveries	846	1,034
Provision	651	798
Balance, end of period	3,083	3,181
Unallocated [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	2,029	2,666
Charge-offs	0	0
Recoveries	0	0
Provision	(262)	(637)
Balance, end of period	1,767	2,029
Acquired Impaired [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	530	779
Charge-offs	(38)	(883)
Recoveries	0	0
Provision	(319)	634
Balance, end of period	$ 173	$ 530