ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Summary of Changes in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands			3 Months Ended				9 Months Ended
		Jan. 01, 2018	Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period		$ 3,188,551					$ 3,188,551		$ 2,571,510
Other comprehensive income before reclassifications			$ 2		$ 72		14,327		(2,630)
(Gain) loss reclassified from accumulated other comprehensive loss to net income			(394)		68		(1,262)		399
Adjustment related to adoption of ASU 2018-02		(1,100)	0	[1]	0	[1]	(1,148)	[1]	0	[1]
Adjustment related to adoption of ASU 2017-12	[2]		0		0		(739)		0
Pension adjustment	[3]		2,566		0		556		0
Terminated swap amortization			(239)		0		(319)		0
Net current-period other comprehensive income			1,935		140		11,415		(2,231)
Balance at the end of the period			3,181,026		3,030,382		3,181,026		3,030,382
Accumulated Other Comprehensive (Loss) Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period		$ (6,965)	2,515		(9,157)		(6,965)		(6,786)
Adjustment related to adoption of ASU 2018-02							(1,148)
Adjustment related to adoption of ASU 2017-12							(739)
Pension adjustment							556
Terminated swap amortization							(319)
Balance at the end of the period			$ 4,450		$ (9,017)		$ 4,450		$ (9,017)

[1] The Company adopted Accounting Standards Update ("ASU") 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, as of January 1, 2018. See Note 2 - Accounting Policies and Pronouncements for further discussion.

[2] The Company adopted ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, as of January 1, 2018. See Note 2 - Accounting Policies and Pronouncements for further discussion.

[3] Net of deferred tax benefit of zero and $0.6 million, for the three and nine months ended September 30, 2018, respectively.