LOANS, Credit Quality By Past Due Status (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Aged analysis of the company's loans [Abstract]
Total Loans	$ 3,861,601		$ 3,865,576
Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	29,108		37,938
90 + Days Past Due and Still Accruing	2,164		2,355
Nonaccrual	19,756		21,928
Total Past Due	51,028		62,221
Current	3,391,500		3,356,000
Total Loans	3,442,528		3,418,221
Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	3,276		7,254
90 + Days Past Due and Still Accruing	396		393
Nonaccrual	5,050		4,432
Total Past Due	8,722		12,079
Acquired Impaired	13,435	[1]	13,761	[1]
Current	396,916		421,515
Total Loans	419,073		447,355
Consumer Mortgage [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	12,106		16,334
90 + Days Past Due and Still Accruing	1,591		1,553
Nonaccrual	8,814		8,866
Total Past Due	22,511		26,753
Current	1,360,191		1,318,534
Total Loans	1,382,702		1,345,287
Consumer Mortgage [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	1,051		1,726
90 + Days Past Due and Still Accruing	75		265
Nonaccrual	2,517		2,420
Total Past Due	3,643		4,411
Acquired Impaired	0	[1]	0	[1]
Current	93,847		98,717
Total Loans	97,490		103,128
Business Lending [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	6,659		6,012
90 + Days Past Due and Still Accruing	71		167
Nonaccrual	9,238		12,010
Total Past Due	15,968		18,189
Current	988,604		984,665
Total Loans	1,004,572		1,002,854
Business Lending [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	1,282		3,665
90 + Days Past Due and Still Accruing	52		80
Nonaccrual	2,134		1,681
Total Past Due	3,468		5,426
Acquired Impaired	13,435	[1]	13,761	[1]
Current	201,360		211,903
Total Loans	218,263		231,090
Consumer Indirect [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	7,133		9,743
90 + Days Past Due and Still Accruing	191		73
Nonaccrual	0		0
Total Past Due	7,324		9,816
Current	624,116		627,541
Total Loans	631,440		637,357
Consumer Indirect [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	310		434
90 + Days Past Due and Still Accruing	24		0
Nonaccrual	0		0
Total Past Due	334		434
Acquired Impaired	0	[1]	0	[1]
Current	7,786		9,727
Total Loans	8,120		10,161
Consumer Direct [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	1,311		1,725
90 + Days Past Due and Still Accruing	48		71
Nonaccrual	6		8
Total Past Due	1,365		1,804
Current	151,552		154,462
Total Loans	152,917		156,266
Consumer Direct [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	326		470
90 + Days Past Due and Still Accruing	11		0
Nonaccrual	0		0
Total Past Due	337		470
Acquired Impaired	0	[1]	0	[1]
Current	12,395		14,738
Total Loans	12,732		15,208
Home Equity [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	1,899		4,124
90 + Days Past Due and Still Accruing	263		491
Nonaccrual	1,698		1,044
Total Past Due	3,860		5,659
Current	267,037		270,798
Total Loans	270,897		276,457
Home Equity [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Past Due 30 - 89 Days	307		959
90 + Days Past Due and Still Accruing	234		48
Nonaccrual	399		331
Total Past Due	940		1,338
Acquired Impaired	0	[1]	0	[1]
Current	81,528		86,430
Total Loans	$ 82,468		$ 87,768

[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.