DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2010
Derivative [Line Items]
Derivative, fixed interest rate					4.11%					4.11%
Interest rate cash flow hedge liability at fair value					$ 187					$ 187
Interest (income) expense, net	$ (163,456)	$ (162,538)	$ (163,814)	$ (147,945)	(155,351)	$ (148,769)	$ (101,651)	$ (99,395)	$ (637,753)	(505,166)	$ (343,392)
Mortgages
Derivative [Line Items]
Derivative asset	51,800				7,800				51,800	7,800
Derivative liability	16,400				4,500				16,400	4,500
Interest rate lock commitments | Mortgages
Derivative [Line Items]
Derivative asset, notional amount	$ 1,200,000				288,500				$ 1,200,000	288,500
Interest Rate Swap
Derivative [Line Items]
Derivative liability, notional amount												$ 37,100
Derivative, fixed interest rate	4.11%								4.11%
Interest (income) expense, net									$ 420	(10)	$ 122
Forward contracts related to mortgage loans held for sale | Mortgages
Derivative [Line Items]
Derivative, notional amount	$ 2,130,000				$ 1,810,000				$ 2,130,000	$ 1,810,000
London Interbank Offered Rate (LIBOR) | Interest Rate Swap
Derivative [Line Items]
Derivative, basis spread on variable rate	1.63%								1.63%