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SHAREHOLDERS’ EQUITY - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Number of shares repurchased and retired (shares)	2,328	1,927	376
Cost of shares repurchased, including commissions	$ 324,583	$ 212,196	$ 34,811
Average cost per share (USD per share)	$ 139.42	$ 110.11	$ 92.51

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Number of shares that have been repurchased and retired during the period.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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

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