STOCK BASED COMPENSATION PLANS (Details 3) (Restricted stock awards, USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Y Numerator Denominator	Jun. 30, 2011 Y
Restricted stock awards
Stock based compensation plan
Vesting period (in years)			5 years	5 years
Numerator for the fraction of awards that vest during a vesting time period			1
Denominator for the fraction of awards that vest during a vesting time period			3
Period of time during which one-third of the awards vest, period one			3	3
Period of time during which one-third of the awards vest, period two			4	4
Period of time during which one-third of the awards vest, period three			5	5
Compensation expense	$ 293,000	$ 220,000	$ 620,000	$ 447,000
Shares
Unvested at the beginning of the period (in shares)			211,371
Granted (in shares)			21,993	13,688
Vested (in shares)			(30,100)
Forfeited (in shares)			(150)
Unvested at the end of the period (in shares)	203,114		203,114
Weighted Average Grant-Date Fair Value
Unvested at the beginning of the period (in dollars per share)			$ 21.56
Granted (in dollars per share)			$ 19.82
Vested (in dollars per share)			$ 21.44
Forfeited (in dollars per share)			$ 20.32
Unvested at the end of the period (in dollars per share)	$ 21.39		$ 21.39