GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS - SUMMARY OF INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 30,418	$ 21,600
Accumulated Amortization	(13,160)	(7,733)
Identifiable Intangible Assets, Net	17,258	13,867
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Cost	6,900	2,400
Accumulated Amortization	(338)	(53)
Identifiable Intangible Assets, Net	6,562	2,347
AMA
Finite-Lived Intangible Assets [Line Items]
Gross Cost	19,200	19,200
Accumulated Amortization	(12,800)	(7,680)
Identifiable Intangible Assets, Net	6,400	$ 11,520
Annadale Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Cost	4,318
Accumulated Amortization	(22)
Identifiable Intangible Assets, Net	$ 4,296