USE OF DERIVATIVES, OFFSETTING DISCLOSURES AND CHANGES IN OTHER COMPREHENSIVE INCOME BY COMPONENT - Schedule of Swap Agreements Expiration Period and Characteristics (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 4,400,000
Interest Rate SWAP Currently-Paying Contracts Expiring Fourth Quarter 2021 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 900,000
Average Fixed Rates	1.61%
Interest Rate SWAP Currently-Paying Contracts Expiring Second Quarter 2020 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 200,000
Average Fixed Rates	2.56%
Interest Rate SWAP Currently-Paying Contracts Expiring Third Quarter 2020 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 200,000
Average Fixed Rates	1.64%
Interest Rate SWAP Currently-Paying Contracts Expiring Fourth Quarter 2020 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 200,000
Average Fixed Rates	2.04%
Interest Rate SWAP Currently-Paying Contracts Expiring Third Quarter 2021 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 2,500,000
Average Fixed Rates	1.25%
Interest Rate SWAP Currently-Paying Contracts Expiring First Quarter 2022 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 400,000
Average Fixed Rates	1.37%