CREDIT FACILITIES AND LONG-TERM DEBT (Details) - USD ($)
$ in Thousands |
12 Months Ended |
|
Dec. 31, 2020 |
Dec. 31, 2019 |
| Line of Credit Facility [Line Items] |
|
|
| Borrowing Capacity |
$ 2,905,000
|
|
| Outstanding Amount |
339,173
|
$ 1,073,695
|
| Fully committed borrowing capacity |
1,483,000
|
|
| Revolving Credit Facility [Member] |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Borrowing Capacity |
2,905,000
|
|
| Long-term Debt [Member] |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Outstanding Amount |
140,000
|
|
| Revolving Facility 2016-1 |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Outstanding Amount |
|
$ 39,346
|
| Weighted Average Interest Rate |
|
6.17%
|
| Revolving Facility 2017-1 |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Outstanding Amount |
|
$ 25,758
|
| Weighted Average Interest Rate |
|
7.00%
|
| Revolving Facility 2018-1 |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Borrowing Capacity |
$ 250,000
|
|
| Outstanding Amount |
|
$ 126,450
|
| Weighted Average Interest Rate |
4.28%
|
5.62%
|
| Revolving Facility 2018-2 |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Borrowing Capacity |
$ 750,000
|
|
| Outstanding Amount |
|
$ 194,293
|
| Weighted Average Interest Rate |
4.36%
|
6.00%
|
| Revolving Facility 2018-3 |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Borrowing Capacity |
$ 100,000
|
|
| Outstanding Amount |
$ 25,385
|
$ 111,411
|
| Weighted Average Interest Rate |
4.19%
|
4.65%
|
| Revolving Facility 2019-1 |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Borrowing Capacity |
$ 300,000
|
|
| Outstanding Amount |
$ 32,535
|
$ 206,399
|
| Weighted Average Interest Rate |
3.58%
|
3.81%
|
| Revolving Facility 2019-2 |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Borrowing Capacity |
$ 1,030,000
|
|
| Outstanding Amount |
$ 230,352
|
$ 327,226
|
| Weighted Average Interest Rate |
3.08%
|
3.41%
|
| Revolving Facility 2019-3 |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Borrowing Capacity |
$ 475,000
|
|
| Outstanding Amount |
$ 50,901
|
$ 42,812
|
| Weighted Average Interest Rate |
3.60%
|
3.02%
|
| Minimum |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Revolving period |
12 months
|
|
| Maximum |
|
|
| Line of Credit Facility [Line Items] |
|
|
| Revolving period |
24 months
|
|