ALLOWANCE FOR CREDIT LOSSES ALLOWANCE FOR CREDIT LOSSES- Additional information (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Receivables [Abstract]
Interest Receivable		$ 41,225		$ 41,225
Reserves for unfunded commitments		14,800		14,800		$ 600
Provision for credit losses	[1]	$ (1,925)	$ (216)	$ 2,013	$ (342)

[1] Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.