SHAREHOLDERS' EQUITY (Treasury Shares) (Details) - Common stocks - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Treasury Shares [Line Items]
Total shares (in shares)	8	3	197	153
Total cost	$ 439	$ 110	$ 9,819	$ 8,602
Average price per share (in usd per share)	$ 53.08	$ 36.77	$ 49.87	$ 56.05
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)	8	3	197	153
Total cost	$ 439	$ 110	$ 9,819	$ 8,602
Average price per share (in usd per share)	$ 53.08	$ 36.77	$ 49.87	$ 56.05