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SHAREHOLDERS' EQUITY - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	9 Months Ended
	Oct. 26, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Class of Stock [Line Items]
Repurchase and retirement of common stock			$ 180,897	$ 34,811
Dividends declared (USD per share)			$ 0.01
Other than accelerated share repurchase program
Class of Stock [Line Items]
Remaining authorized repurchase amount (up to)			$ 419,100
Repurchase of common stock (shares)		311,593	1,612,174	376,309
Repurchase and retirement of common stock		$ 29,000	$ 180,900	$ 34,800
Repurchase of common stock (USD per share)		$ 93.09	$ 112.19	$ 92.51
Subsequent Event
Class of Stock [Line Items]
Dividends declared (USD per share)	$ 0.01

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