DERIVATIVES AND HEDGING ACTIVITIES - Effect on Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effect of cash flow hedge accounting on Accumulated Other Comprehensive Income (Loss):
Gain (loss) recognized in other comprehensive income	$ 5,277	$ (24,449)	$ (8,254)
Gain recognized on termination of derivatives	(16,505)	(6,596)
Interest Rate Products [Member] | Other Comprehensive Income
Effect of cash flow hedge accounting on Accumulated Other Comprehensive Income (Loss):
Gain (loss) recognized in other comprehensive income	5,277	(24,449)	(8,254)
Interest Rate Products [Member] | Other Comprehensive Income | Interest Expense
Effect of cash flow hedge accounting on Accumulated Other Comprehensive Income (Loss):
Loss reclassified from other comprehensive income into interest expense	(940)	(6,127)	$ 955
Interest Rate Products [Member] | Other Comprehensive Income | Derivatives.
Effect of cash flow hedge accounting on Accumulated Other Comprehensive Income (Loss):
Gain recognized on termination of derivatives	$ 16,505	$ 6,596