COMMON STOCK (Details 4) (Stock Unit Plan for directors)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Unit Plan for directors
Assumptions used for estimating fair value of grants outstanding
Number of shares authorized under the plan	400,000
Number of shares accrued in director's accounts	143,058	133,956
Number of shares available for issuance under the plan	258,960	280,282
Units accrued for service and dividends (in shares)	30,426	25,287	33,364
Units redeemed for common stock (in shares)	21,324	31,243	6,347

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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