STOCK BASED COMPENSATION PLANS (Details) (Stock options, USD $) Share data in Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Stock options
Stock based compensation plans
Intrinsic value of options outstanding and exercisable	$ 17,000	$ 12,000
Number of Options
Outstanding at the beginning of the period (in shares)	54,223
Forfeited	(2,386)
Outstanding at the end of the period (in shares)	51,837
Vested and Exercisable at the end of the period (in shares)	51,837
Weighted Average Exercise Price
Outstanding at beginning of the period (in dollars per share)	$ 25.05
Forfeited (in dollars per share)	$ 25.27
Outstanding at the end of the period (in dollars per share)	$ 25.04
Vested and Exercisable at the end of the period (in dollars per share)	$ 25.04
Weighted Average Remaining Contractual Life
Outstanding at the end of the period (in years)	3 years 9 months 29 days
Vested and Exercisable at the end of the period (in years)	3 years 9 months 29 days
Aggregate Intrinsic Value
Outstanding at the end of the period	17,000
Vested and Exercisable at the end of the period	$ 17,000	$ 12,000