RESTRICTED CASH - Schedule of Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash shown in the Consolidated Balance Sheets	$ 475	$ 1,233
Cash and cash equivalents	132,362	68,735
Total cash, cash equivalents and restricted cash shown in the Consolidated Statements of Cash Flows	132,837	$ 69,968	$ 164,480	$ 156,454
Restricted cash held in escrow
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash shown in the Consolidated Balance Sheets	$ 475