SENIOR NOTES PAYABLE - Additional information (Details) - Senior Notes - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Jan. 05, 2022
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 20,073,000	$ 12,858,000
Outstanding balance	1,627,649,000		$ 1,606,560,000
Net of unamortized debt issue costs	$ 20,474,000		$ 21,489,000
Debt, weighted average interest rate	5.69%		5.69%
Interest expense on senior notes total	$ 24,409,000	$ 18,706,000
Senior notes payable	1,648,123,000		$ 1,628,049,000
Sales Agreement Prospectus
Debt Instrument [Line Items]
Outstanding notes payable	$ 91,838,000		$ 111,911,000
Sales Agreement Prospectus | Maximum
Debt Instrument [Line Items]
Senior notes payable				$ 250,000,000