SHARE-BASED COMPENSATION - Weighted Average Assumptions Used in Estimating the Value of Stock Options Granted (Details) (Stock options, USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	40.41%	38.56%	37.62%
Expected dividends	2.94%	2.48%	0.51%
Expected term (in years)	5 years 120 days	5 years 266 days	5 years 58 days
Risk-free rate	1.01%	2.65%	2.52%
Weighted average grant date fair value	$ 5.72	$ 7.54	$ 5.28