LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Credit Risk Exposure Indicators by Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,578,167	$ 1,563,866	$ 1,516,181
Residential real estate loans
Financing Receivable, Recorded Investment [Line Items]
Loans	571,934	572,173	573,284
Residential real estate loans | Pass (Grades 1-6)
Financing Receivable, Recorded Investment [Line Items]
Loans	554,001	555,444
Residential real estate loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans
Residential real estate loans | Special Mention (Grade 7)
Financing Receivable, Recorded Investment [Line Items]
Loans	2,749	1,291
Residential real estate loans | Substandard (Grade 8)
Financing Receivable, Recorded Investment [Line Items]
Loans	15,184	15,438
Residential real estate loans | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans
Commercial real estate loans
Financing Receivable, Recorded Investment [Line Items]
Loans	505,992	506,231	480,062
Commercial real estate loans | Pass (Grades 1-6)
Financing Receivable, Recorded Investment [Line Items]
Loans	443,508	440,610
Commercial real estate loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans
Commercial real estate loans | Special Mention (Grade 7)
Financing Receivable, Recorded Investment [Line Items]
Loans	16,875	17,069
Commercial real estate loans | Substandard (Grade 8)
Financing Receivable, Recorded Investment [Line Items]
Loans	45,609	48,552
Commercial real estate loans | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans
Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	191,292	190,454	179,797
Commercial loans | Pass (Grades 1-6)
Financing Receivable, Recorded Investment [Line Items]
Loans	167,725	165,460
Commercial loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans
Commercial loans | Special Mention (Grade 7)
Financing Receivable, Recorded Investment [Line Items]
Loans	7,603	7,449
Commercial loans | Substandard (Grade 8)
Financing Receivable, Recorded Investment [Line Items]
Loans	15,964	17,545
Commercial loans | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans
Home equity loans
Financing Receivable, Recorded Investment [Line Items]
Loans	291,690	278,375	270,322
Home equity loans | Pass (Grades 1-6)
Financing Receivable, Recorded Investment [Line Items]
Loans
Home equity loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans	289,835	276,742
Home equity loans | Special Mention (Grade 7)
Financing Receivable, Recorded Investment [Line Items]
Loans
Home equity loans | Substandard (Grade 8)
Financing Receivable, Recorded Investment [Line Items]
Loans
Home equity loans | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans	1,855	1,633
Consumer loans
Financing Receivable, Recorded Investment [Line Items]
Loans	17,259	16,633	12,716
Consumer loans | Pass (Grades 1-6)
Financing Receivable, Recorded Investment [Line Items]
Loans
Consumer loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans	16,773	16,376
Consumer loans | Special Mention (Grade 7)
Financing Receivable, Recorded Investment [Line Items]
Loans
Consumer loans | Substandard (Grade 8)
Financing Receivable, Recorded Investment [Line Items]
Loans
Consumer loans | Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 486	$ 257