SHARE-BASED COMPENSATION Stock-Based Compensation - Stock Options (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding	203,903	263,059
Weighted Average Exercise Price	$ 20.27	$ 20.42
Exercised	(38,596)	(59,156)
Outstanding	165,307	203,903
Weighted Average Exercise Price	$ 20.90	$ 20.27
Exercisable	165,307	203,903
Weighted Average Exercise Price Exercisable	$ 20.90	$ 20.27
ShareBasedCompensationArrangementByShareBasedPayment Award Excercises in Period Weighted Average Excercise Price	$ 17.56	$ 20.92