LEASES (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) renewalOption	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Number of renewal options | renewalOption	1
Operating lease right-of-use assets	$ 84,109	$ 25,519
Operating lease, liability	97,738	28,200
Operating lease cost	11,226	6,346
Short-term lease cost	59	86
Total lease cost	$ 11,285	$ 6,432
Weighted average remaining lease term	13 years	5 years
Weighted average discount rate	5.00%	4.70%
Operating cash flows from operating leases	$ 2,359	$ 6,779
Right-of-use assets obtained in exchange for new operating lease liabilities	66,881	21,969
2021	9,147
2022	12,823
2023	12,617
2024	10,973
2025	9,336
Thereafter	96,062
Total lease payments	150,958
Less: Interest	44,959
Less: Tenant improvement allowances	8,261
Present value of lease liabilities	$ 97,738	28,200
Rental expense			$ 3,400
Rental income		$ 300	$ 900
Principal Executive Offices
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets				$ 65,700
Operating lease, liability				65,700
Present value of lease liabilities				$ 65,700
Minimum
Lessee, Lease, Description [Line Items]
Renewal term	2 years
Maximum
Lessee, Lease, Description [Line Items]
Renewal term	5 years