FAIR VALUE OF ASSETS AND LIABILITIES - Carrying values and estimated fair values of financial instruments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Carrying value
Financial Assets
Cash and due from banks	$ 23,719	$ 43,574
Interest-bearing time deposits	5,220
Securities available-for-sale	99,816	126,287
Federal Home Loan Bank stock	5,340	5,747
Loans held-for-sale	708	1,879
Loans receivable net	420,306	388,758
Accrued interest receivable	1,823	1,818
Financial Liabilities
Demand (non-interest-bearing)	83,892	98,850
Demand (interest-bearing)	79,232	65,991
Money market	125,070	128,501
Savings and other	107,380	103,985
Certificates of deposit	84,295	93,888
Deposits	479,869	491,215
FHLBB advances	30,801	31,980
Repurchase agreements	3,870	1,784
Accrued interest payable	166	196
Estimated fair value
Financial Assets
Cash and due from banks	23,719
Interest-bearing time deposits	5,220
Securities available-for-sale	99,816
Federal Home Loan Bank stock	5,340
Loans held-for-sale	713
Loans receivable net	413,809
Accrued interest receivable	1,823
Financial Liabilities
Demand (non-interest-bearing)	83,892
Demand (interest-bearing)	79,232
Money market	125,070
Savings and other	107,380
Certificates of deposit	84,950
Deposits	480,524
FHLBB advances	33,692
Repurchase agreements	3,870
Accrued interest payable	166
Fair Value Measurements Using, Level 1
Financial Assets
Cash and due from banks	23,719
Interest-bearing time deposits
Securities available-for-sale	536
Federal Home Loan Bank stock
Loans held-for-sale
Loans receivable net
Accrued interest receivable
Financial Liabilities
Demand (non-interest-bearing)
Demand (interest-bearing)
Money market
Savings and other
Certificates of deposit
Deposits
FHLBB advances
Repurchase agreements
Accrued interest payable
Fair Value Measurements Using, Level 2
Financial Assets
Cash and due from banks
Interest-bearing time deposits
Securities available-for-sale	99,280
Federal Home Loan Bank stock	5,340
Loans held-for-sale
Loans receivable net
Accrued interest receivable
Financial Liabilities
Demand (non-interest-bearing)
Demand (interest-bearing)
Money market
Savings and other
Certificates of deposit
Deposits
FHLBB advances
Repurchase agreements
Accrued interest payable
Fair Value Measurements Using, Level 3
Financial Assets
Cash and due from banks
Interest-bearing time deposits	5,220
Securities available-for-sale
Federal Home Loan Bank stock
Loans held-for-sale	713
Loans receivable net	413,809
Accrued interest receivable	1,823
Financial Liabilities
Demand (non-interest-bearing)	83,892
Demand (interest-bearing)	79,232
Money market	125,070
Savings and other	107,380
Certificates of deposit	84,950
Deposits	480,524
FHLBB advances	33,692
Repurchase agreements	3,870
Accrued interest payable	166
Estimated fair value
Financial Assets
Cash and due from banks		43,574
Interest-bearing time deposits
Securities available-for-sale		126,287
Federal Home Loan Bank stock		5,747
Loans held-for-sale		1,893
Loans receivable net		389,292
Accrued interest receivable		1,818
Financial Liabilities
Demand (non-interest-bearing)		98,850
Demand (interest-bearing)		65,991
Money market		128,501
Savings and other		103,985
Certificates of deposit		94,894
Deposits		492,221
FHLBB advances		35,363
Repurchase agreements		1,784
Accrued interest payable		196
Fair Value Measurements Using, Level 1
Financial Assets
Cash and due from banks		43,574
Interest-bearing time deposits
Securities available-for-sale		167
Federal Home Loan Bank stock
Loans held-for-sale
Loans receivable net
Accrued interest receivable
Financial Liabilities
Demand (non-interest-bearing)
Demand (interest-bearing)
Money market
Savings and other
Certificates of deposit
Deposits
FHLBB advances
Repurchase agreements
Accrued interest payable
Fair Value Measurements Using, Level 2
Financial Assets
Cash and due from banks
Interest-bearing time deposits
Securities available-for-sale		126,120
Federal Home Loan Bank stock		5,747
Loans held-for-sale
Loans receivable net
Accrued interest receivable
Financial Liabilities
Demand (non-interest-bearing)
Demand (interest-bearing)
Money market
Savings and other
Certificates of deposit
Deposits
FHLBB advances
Repurchase agreements
Accrued interest payable
Fair Value Measurements Using, Level 3
Financial Assets
Cash and due from banks
Interest-bearing time deposits
Securities available-for-sale
Federal Home Loan Bank stock
Loans held-for-sale		1,893
Loans receivable net		389,292
Accrued interest receivable		1,818
Financial Liabilities
Demand (non-interest-bearing)		98,850
Demand (interest-bearing)		65,991
Money market		128,501
Savings and other		103,985
Certificates of deposit		94,894
Deposits		492,221
FHLBB advances		35,363
Repurchase agreements		1,784
Accrued interest payable		$ 196

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SavingsAndOther

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Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.

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A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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A bank's noninterest bearing demand deposits in other banks (such as correspondents).

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Amount of money in interest-bearing domestic accounts that entitle the depositor to withdraw funds at any time without prior notice, also known as demand deposits.

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Amount of interest-bearing domestic deposit liabilities for time deposit liabilities other than certificates of deposit.

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Amount of interest payable on debt, including, but not limited to, trade payables.

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Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Amount of money in noninterest-bearing domestic accounts that entitle the depositor to withdraw funds at any time without prior notice, also known as demand deposits.

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An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

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The amount at risk under repurchase agreements is defined as the excess of carrying amount (or market value, if higher than the carrying amount or if there is no carrying amount) of the securities or other assets sold under agreement to repurchase, including accrued interest plus any cash or other assets on deposit to secure the repurchase obligation, over the amount of the repurchase liability (adjusted for accrued interest).

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