SUBSEQUENT EVENTS (Details) (USD $)	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 28, 2015
SUBSEQUENT EVENTS
Cash dividend (in dollars per share)	$ 0.48	$ 0.48	$ 0.44
Subsequent events
SUBSEQUENT EVENTS
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures				248,000
Cash dividend (in dollars per share)				$ 0.12