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RECLASSIFICATIONS FOR ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset	$ 135,190	$ 0
Operating Lease, Liability	141,117
Retained earnings	2,339,703	2,191,471
Accumulated other comprehensive loss	(302,490)	$ (288,447)	$ (216,840)
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset	151,000
Operating Lease, Liability	151,000
Accounting Standards Update 2018-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	26,257
Accumulated other comprehensive loss	$ (26,257)