ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Leases (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) renewal_option	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Lessee, Lease, Description [Line Items]
Right-of-use asset	$ 161.3
Lease liability	$ 139.9		$ 71.2
Number of options to renew | renewal_option	1
Minimum
Lessee, Lease, Description [Line Items]
Lease renewal term (years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease renewal term (years)	20 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Right-of-use asset		$ 76.9
Lease liability		$ 79.2