EQUITY - Treasury Stock (Details)	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Treasury Stock
Repurchase of common stock (in shares)	6,589
Average cost of repurchase (in dollars per share) | $ / shares	$ 40.95
Number of options exercised (in shares)	13,939
Exercised (in dollars per share) | $ / shares	$ 23.25
Number of options exercised via share settlement	2,083
Restricted stock
Treasury Stock
Issuance of restricted stock from treasury stock (in shares)	10,412
Average cost (in dollars per share) | $ / shares	$ 39.82