COMMON STOCK (Details 4) (Stock Unit Plan for directors)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
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	133,956	139,912
Number of shares available for issuance under the plan	280,282	311,523
Units accrued for service and dividends (in shares)	25,287	33,364	33,024
Units redeemed for common stock (in shares)	31,243	6,347	34,853

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).

+ References+ Details

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.

+ References+ Details