SHAREHOLDERS' EQUITY (Treasury Shares) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Treasury Shares [Line Items]
Total shares (in shares)	1	0	165	175
Total cost	$ 31	$ 0	$ 9,445	$ 8,699
Average price per share (in usd per share)	$ 61.23	$ 0	$ 57.23	$ 49.57
In the open market
Treasury Shares [Line Items]
Total shares (in shares)	0	0	0	0
Total cost	$ 0	$ 0	$ 0	$ 0
Average price per share (in usd per share)	$ 0	$ 0	$ 0	$ 0
From employees
Treasury Shares [Line Items]
Total shares (in shares)	1	0	165	175
Total cost	$ 31	$ 0	$ 9,445	$ 8,699
Average price per share (in usd per share)	$ 61.23	$ 0	$ 57.23	$ 49.57