STOCK-BASED COMPENSATION (Details) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Jun. 30, 2011
Awards granted
Shares		224,162	224,162
Authorized stock split declared, number of shares per each share held	2		2
Restricted stock awards
Awards granted
Shares		154,214	154,214
Weighted-Average Grant-Date Fair Value (in dollars per share)		$ 48.43	$ 48.43
Performance stock awards
Awards granted
Shares		69,948	69,948
Weighted-Average Grant-Date Fair Value (in dollars per share)		$ 48.13	$ 48.13