ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Summary of Changes in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period		$ 3,188,551	$ 2,571,510
Other comprehensive income before reclassifications		8,271	160
Loss (gain) reclassified from accumulated other comprehensive loss to net income (loss)		(216)	198
Adjustment related to adoption of ASU 2018-02	[1]	(1,148)	0
Adjustment related to adoption of ASU 2017-12	[2]	(739)	0
Net current-period other comprehensive income		6,168	358
Balance at the end of the period		3,079,363	2,617,306
Accumulated Other Comprehensive (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period		(6,965)	(6,786)
Adjustment related to adoption of ASU 2018-02		(1,148)
Adjustment related to adoption of ASU 2017-12		(739)
Balance at the end of the period		$ (797)	$ (6,428)

[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.