DERIVATIVES AND HEDGING ACTIVITIES, Effect on Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Effect of cash flow hedge accounting on Accumulated Other Comprehensive Income (Loss):
Amount of gain (loss) recognized in other comprehensive income	$ 21,453	$ (20,581)
Interest Rate Products | Other Comprehensive Income
Effect of cash flow hedge accounting on Accumulated Other Comprehensive Income (Loss):
Amount of gain (loss) recognized in other comprehensive income	21,453	(20,581)
Interest Rate Products | Other Comprehensive Income | Interest Expense
Effect of cash flow hedge accounting on Accumulated Other Comprehensive Income (Loss):
Amount of gain (loss) reclassified from other comprehensive income into interest expense	$ 854	$ 204