GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS - SUMMARY OF INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 26,100	$ 21,600
Accumulated Amortization	(11,743)	(7,733)
Identifiable Intangible Assets, Net	14,357	13,867
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Cost	6,900	2,400
Accumulated Amortization	(223)	(53)
Identifiable Intangible Assets, Net	6,677	2,347
AMA
Finite-Lived Intangible Assets [Line Items]
Gross Cost	19,200	19,200
Accumulated Amortization	(11,520)	(7,680)
Identifiable Intangible Assets, Net	$ 7,680	$ 11,520