DERIVATIVE INSTRUMENTS - Pre-tax Gain (Loss) on Derivative Instruments (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative [Line Items]
Pre-tax gains (losses) on interest rate derivatives recognized		$ 4,199	$ 4,576	$ 8,280	$ (12,056)
Total gain (loss) on derivatives		(4,247)	(7,156)	(8,397)	(8,190)
Interest Rate Swap
Derivative [Line Items]
Pre-tax gains (losses) on interest rate derivatives recognized		4,199	830	8,280	(15,802)
Interest rate swaps that discontinued hedge accounting		0	3,746	0	3,746
Interest Rate Swap | Interest Expense
Derivative [Line Items]
Gain (loss) location of derivative instruments	$ 3,700	(4,246)	(3,654)	(8,395)	(4,453)
Gain (loss) location of derivative instruments not designated		(1)	244	(2)	9
Gain (loss) location of discontinued derivative instruments		$ 0	$ (3,746)	$ 0	$ (3,746)