SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES , RECENT ACCOUNTING PRONOUCEMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease right-of-use assets	$ 112,042		$ 0
Lease liability	$ 145,234
Cumulative effect of adoption of new accounting standard, net of tax		$ 12,057		$ 54,464
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease right-of-use assets		116,000
Lease liability		150,000
Cumulative effect of adoption of new accounting standard, net of tax		$ 12,000