GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS - SUMMARY OF INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 30,320	$ 30,418
Accumulated Amortization	(14,619)	(13,160)
Identifiable Intangible Assets, Net	15,701	17,258
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Cost	6,900	6,900
Accumulated Amortization	(453)	(338)
Identifiable Intangible Assets, Net	6,447	6,562
AMA
Finite-Lived Intangible Assets [Line Items]
Gross Cost	19,200	19,200
Accumulated Amortization	(14,080)	(12,800)
Identifiable Intangible Assets, Net	5,120	6,400
Annadale
Finite-Lived Intangible Assets [Line Items]
Gross Cost	4,220	4,318
Accumulated Amortization	(86)	(22)
Identifiable Intangible Assets, Net	$ 4,134	$ 4,296