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TREASURY STOCK (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Nov. 06, 2019	Feb. 26, 2019	Aug. 07, 2018
Treasury Stock Purchase
Common stock repurchased	$ 254,308	$ 621	$ 222,792	$ 553,200	$ 251,949
Number of shares repurchased of common stock from employees in lieu of cash or withholding taxes due	0
August 2018 Repurchase Plan
Treasury Stock Purchase
Share repurchase program, authorized amount								$ 500,000
Common stock repurchased (in shares)	400,000
Average purchase price (in dollars per share)	$ 58.32
Common stock repurchased	$ 20,600
February 2019 Repurchase Plan
Treasury Stock Purchase
Common stock repurchased (in shares)	4.0
Average purchase price (in dollars per share)	$ 58.62
Common stock repurchased	$ 233,700
Share repurchase program, authorized remaining amount						$ 36,600
February 2019 Repurchase Plan | Maximum
Treasury Stock Purchase
Share repurchase program, authorized amount							$ 500,000

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

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