LEASES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Lease initial direct cost expense commencement	$ 1.8
Gain (loss) on termination of lease	3.1
Operating lease revenue including variable revenue	158.4	$ 142.0
Total undiscounted cash flows	19.3
2022	18.3
2023	$ 1.0
Commercial Real Estate Property
Lessee, Lease, Description [Line Items]
Renewal term	15 years
Land at Gremp Campus
Lessee, Lease, Description [Line Items]
Gain (loss) on sale of land	$ 0.0
Minimum
Lessee, Lease, Description [Line Items]
Renewal term	60 days
Maximum
Lessee, Lease, Description [Line Items]
Renewal term	5 years