STOCK-BASED PLANS (Details) (Options, USD $)	3 Months Ended
	Mar. 31, 2013
Options
Stock Options
Stock Options Outstanding at the beginning of the period (in shares)	861,940
Granted (in shares)	36,100
Forfeited (in shares)	(8,000)
Stock Options Outstanding at the end of the period (in shares)	890,040
Weighted Average Exercise Price
Stock Options Outstanding at the beginning of the period (in dollars per share)	$ 59.17
Granted (in dollars per share)	$ 81.80
Forfeited (in dollars per share)	$ 59.37
Stock Options Outstanding at the end of the period (in dollars per share)	$ 60.08
Vesting period of options granted	5 years
Expiration period	10 years
Excercisable period	5 years