DERIVATIVE INSTRUMENTS - Pre-tax Gain (Loss) on Derivative Instruments (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative [Line Items]
Pre-tax gains (losses) on interest rate derivatives recognized		$ 2,892	$ 4,022	$ 11,172	$ (8,034)
Total gain (loss) on derivatives		(2,903)	(4,193)	(11,300)	(12,382)
Interest Rate Swap
Derivative [Line Items]
Pre-tax gains (losses) on interest rate derivatives recognized		2,892	4,022	11,172	(11,780)
Interest rate swaps that discontinued hedge accounting		0	0	0	3,746
Interest Rate Swap | Interest expense
Derivative [Line Items]
Gain (loss) location of derivative instruments	$ (3,700)	(2,903)	(4,152)	(11,298)	(8,604)
Gain (loss) location of derivative instruments not designated		0	(41)	(2)	(32)
Gain (loss) location of discontinued derivative instruments		$ 0	$ 0	$ 0	$ (3,746)