SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - RECENT ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease ROU Assets	$ 220,678		$ 0
Total operating lease liabilities	213,372
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease ROU Assets		$ 227,258
Total operating lease liabilities		216,966
Cumulative effect of new accounting principle in period of adoption	3,913
Accounting Standards Update 2016-02 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	$ 3,913	$ 3,913