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STOCK AWARD PLANS, Employee Plan Stock Option Activity (Details) - Employee Stock Award Plan [Member]
 6 Months Ended
Jun. 30, 2017
$ / shares
shares
Stock Award Plan Information [Abstract]  
Shares available for future grants (in shares) 1,741,076
Stock Options [Member]  
Stock Award Plan Information [Abstract]  
Term of grant 7 years
Vesting period 3 years
Outstanding Non-Qualified or Nonincentive Stock Awards [Roll Forward]  
Outstanding at Period Start (in shares) 601,121
Granted (in shares) 121,908
Exercised (in shares) (16,910)
Outstanding at Period End (in shares) 706,119
Weighted Average Exercise Price [Abstract]  
Outstanding at Period Start (in dollars per share) | $ / shares $ 65.33
Granted (in dollars per share) | $ / shares 68.50
Exercised (in dollars per share) | $ / shares 32.82
Outstanding at Period End (in dollars per share) | $ / shares $ 66.66
Stock Appreciation Rights [Member]  
Outstanding Non-Qualified or Nonincentive Stock Awards [Roll Forward]  
Outstanding at Period End (in shares) 0