USE OF DERIVATIVES, OFFSETTING DISCLOSURES AND CHANGES IN OTHER COMPREHENSIVE INCOME BY COMPONENT - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2010
Derivative Instruments And Hedging Activities Disclosures [Line Items]
SWAP agreement notional amount during period	$ 1,030.0	$ 1,280.0	$ 100.0
SWAP agreement average interest rate during period		0.29%	4.09%
Derivative instruments unrealized gains to be recognized		$ 4.8
Interest Rate Swap Agreements [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Payment term of SOFR interest rate agreement			20 years
Interest Rate Swap Agreements [Member] | Minimum [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Payment term of SOFR interest rate agreement		18 months
Interest Rate Swap Agreements [Member] | Maximum [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Payment term of SOFR interest rate agreement		3 years