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LONG-TERM DEBT (Details) - USD ($) $ in Thousands		3 Months Ended
	Feb. 12, 2018	Mar. 31, 2018	Mar. 31, 2017
Debt Instrument [Line Items]
Cash proceeds received		$ 499,295	$ 0
Senior Notes Due March 01, 2028 [Member]
Debt Instrument [Line Items]
Long term debt, face amount	$ 500,000
Debt instrument, interest rate, stated percentage	4.20%
Credit facility, expiration date	Mar. 01, 2028
Periodic payment, interest	$ 10,500
Periodic payment, interest, exception of first payment	$ 11,550
Cash proceeds received		495,044
Original issue discount		705
Debt issuance costs		$ 4,251

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-SubTopic 30
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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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