DERIVATIVES - Net Gains (Losses) Relating to the Cash Flow Derivative Instruments (Details) - Derivative designated as a cash flow hedge - Interest rate swaps - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net gains (losses) recorded in accumulated other comprehensive income and the Consolidated Statements of Income
Interest rate contracts, Amount of (loss) gain recognized in OCI included component	$ 14	$ (657)	$ (11,059)	$ (5,360)
Interest rate contracts, Amount of gain (loss) reclassified from Accumulated OCI into income included component	$ (4,325)	$ 331	$ (4,414)	$ 1,353