BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	$ 29,884
Lease liabilities	$ 19,604
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets		$ 23,600
Lease liabilities		$ 23,600