SHARE INCENTIVE PLANS (Employee Stock Purchase Plan activity) (Details) - $ / shares	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Share-based Payment Arrangement [Abstract]
Stock issued during period, employee stock ownership plan (in shares)	162,573	288,017
Average price per share (in USD per share)	$ 68.00	$ 39.40

Number of shares of capital stock issued (purchased by employees) in connection with an employee stock ownership plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration