BASIS OF PRESENTATION - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended
	May 31, 2018	Sep. 30, 2019	Jan. 01, 2019
New Accounting Pronouncement, Early Adoption [Line Items]
Lease liabilities		$ 108,655
ROU assets		$ 97,738
Accounting Standards Update 2016-02
New Accounting Pronouncement, Early Adoption [Line Items]
Lease liabilities			$ 76,400
ROU assets			$ 67,300
Public Offering
New Accounting Pronouncement, Early Adoption [Line Items]
Stock issued during the period (in shares)	6,000,000.0
Stock issued during the period, value	$ 349,600