STOCK-BASED COMPENSATION (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Awards granted
Shares	28,160	144,386
Restricted stock awards
Awards granted
Shares	27,760	75,267
Weighted-Average Grant-Date Fair Value (in dollars per share)	57.35	63.65
Performance stock awards
Awards granted
Shares	400	69,119
Weighted-Average Grant-Date Fair Value (in dollars per share)	54.84	67.26
Performance Goals	3