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EARNINGS PER SHARE Accelerated Share Repurchase (Details) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 07, 2019	Dec. 31, 2018	Dec. 31, 2017
Accelerated Share Repurchases [Line Items]
Payments for Repurchase of Common Stock	$ (2,572)	$ (1,661)
Stock Repurchase Program, Authorized Amount				$ 400,000	$ 300,000
Treasury Stock, Shares, Acquired	365,272		1,953,167
Stock Repurchase Program Expiration Date	Dec. 31, 2020
Treasury Stock, Common [Member]
Accelerated Share Repurchases [Line Items]
Payments for Repurchase of Common Stock	$ (100,000)

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The cash outflow to reacquire common stock during the period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
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Amount of stock repurchase plan authorized.

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Expiration date for the purchase of an entity's own shares under a stock repurchase plan, in the CCYY-MM-DD format.

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Number of shares that have been repurchased during the period and are being held in treasury.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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