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SHAREHOLDERS' EQUITY (Treasury Shares) (Details) - Common stocks - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Treasury Shares [Line Items]
Total shares (in shares)	157	149
Total cost	$ 9,003	$ 7,163
Average price per share (in usd per share)	$ 57.17	$ 48.08
In the Open Market
Treasury Shares [Line Items]
Total shares (in shares)	0	0
Total cost	$ 0	$ 0
Average price per share (in usd per share)	$ 0.00	$ 0.00
From Employees
Treasury Shares [Line Items]
Total shares (in shares)	157	149
Total cost	$ 9,003	$ 7,163
Average price per share (in usd per share)	$ 57.17	$ 48.08

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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