ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Summary of Changes in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands			12 Months Ended
		Jan. 01, 2018	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period		$ 3,188,551	$ 3,188,551		$ 2,571,510		$ 2,363,889
Other comprehensive income (loss) before reclassifications			2,120		(1,084)
Loss reclassified from accumulated other comprehensive loss to net income (loss)			(1,135)		905
Adoption of ASU 2018-02		(1,100)	(1,148)	[1]	0	[1]	0	[1]
Adoption of ASU 2017-12	[2]		(739)		0		0
Pension adjustment, net of tax	[3]		759		0		(890)
Terminated swap amortization			(1,018)		0		0
Other comprehensive (loss) income			(1,161)		(179)		1,103
Balance at the end of the period			3,238,126		3,188,551		2,571,510
Accumulated Other Comprehensive (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period		$ (6,965)	(6,965)		(6,786)		(7,889)
Adoption of ASU 2018-02			(1,148)
Adoption of ASU 2017-12			(739)
Pension adjustment, net of tax			759				(890)
Terminated swap amortization			(1,018)
Balance at the end of the period			$ (8,126)		$ (6,965)		$ (6,786)

[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 1 - Summary of Significant Accounting Policies 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 1 - Summary of Significant Accounting Policies for further discussion.

[3] Net of deferred tax expense of $0.5 million for the year ended December 31, 2018 and deferred tax benefit of zero and $0.5 million for the years ended December 31, 2017 and 2016, respectively.