LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Loan Aging Analysis by Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days Past Due	$ 6,318	$ 6,006
60-89 days Past Due	2,017	3,699
Greater Than 90 Days	17,258	18,123
Total Past Due	25,593	27,828
Current	1,552,574	1,536,038
Loans ending balance	1,578,167	1,563,866	1,516,181
Loans > 90 Days Past Due and Accruing	49	611
Non-Accrual Loans	21,568	22,483
Residential real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days Past Due	1,404	1,459
60-89 days Past Due	615	850
Greater Than 90 Days	7,955	8,410
Total Past Due	9,974	10,719
Current	561,960	561,454
Loans ending balance	571,934	572,173	573,284
Loans > 90 Days Past Due and Accruing		193
Non-Accrual Loans	10,311	10,584
Commercial real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days Past Due	3,125	896
60-89 days Past Due	797	2,227
Greater Than 90 Days	4,781	5,380
Total Past Due	8,703	8,503
Current	497,289	497,728
Loans ending balance	505,992	506,231	480,062
Loans > 90 Days Past Due and Accruing	49	138
Non-Accrual Loans	5,782	6,719
Commercial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days Past Due	769	1,079
60-89 days Past Due	490	68
Greater Than 90 Days	2,434	2,969
Total Past Due	3,693	4,116
Current	187,599	186,338
Loans ending balance	191,292	190,454	179,797
Loans > 90 Days Past Due and Accruing		160
Non-Accrual Loans	3,134	3,409
Home equity loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days Past Due	983	2,230
60-89 days Past Due	101	355
Greater Than 90 Days	1,602	1,105
Total Past Due	2,686	3,690
Current	289,004	274,685
Loans ending balance	291,690	278,375	270,322
Loans > 90 Days Past Due and Accruing		118
Non-Accrual Loans	1,855	1,514
Consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days Past Due	37	342
60-89 days Past Due	14	199
Greater Than 90 Days	486	259
Total Past Due	537	800
Current	16,722	15,833
Loans ending balance	17,259	16,633	12,716
Loans > 90 Days Past Due and Accruing		2
Non-Accrual Loans	$ 486	$ 257