LEASES - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) lease renewal_option	Jan. 01, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of extension options | renewal_option	2
Accounting Standards Update 2018-11
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset		$ 37.8
Operating lease payments	$ 1.5
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease renewal term	1 year
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease renewal term	20 years
Plant
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease renewal term	5 years
Number of operating leases | lease	2
Lease renewal term, total	20 years