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DEBT (Long-Term Obligations) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2017
--- | --- | --- | ---
Components of the company's debt obligations |  |  |
Consolidated Leverage Ratio | 1.81 |  |
Consolidated Interest Coverage Ratio | 15.92 |  |
Finance Lease, Liability, Noncurrent | $ 30,115 | $ 29,952 |
Long-term Debt and Lease Obligation, Gross | 1,107,798 | 1,153,682 |
Debt Instrument and Lease Obligations Carrying Amount Current Maturities | (66,056) | (65,988) |
Total long-term obligations | 1,041,742 | 1,087,694 |
Deferred Finance Costs, Net, Total | 1,807 | 2,241 |
Deferred debt issuance costs noncurrent | 1,807 | 2,241 |
Long-term obligations including current maturities | 1,105,991 | 1,151,441 |
Current maturities of long-term obligations | (66,056) | (65,988) |
Long-Term Obligations, net of unamortized debt issuance costs | 1,039,935 | 1,085,453 |
Aggregate long-term maturities, excluding finance lease obligations |  |  |
Year One | 62,023 |  |
Year Two | 134,772 |  |
Year Three | 119,655 |  |
Year Four | 510,581 |  |
Year Five | 229 |  |
After Year Five | $ 250,423 |  |
Minimum |  |  |
Components of the company's debt obligations |  |  |
Consolidated Interest Coverage Ratio | 3.00 |  |
Maximum |  |  |
Components of the company's debt obligations |  |  |
Consolidated Leverage Ratio | 3.50 |  |
Notes payable 0.00% – 10.90%, due in monthly and annual installments through 2028 |  |  |
Components of the company's debt obligations |  |  |
Long-term obligations gross including current maturities | $ 13,993 | 19,220 |
Deferred Finance Costs, Net, Total | 0 | 0 |
Long-term debt | $ 13,993 | $ 19,220 |
Notes payable 0.00% – 10.90%, due in monthly and annual installments through 2028 | Minimum |  |  |
Components of the company's debt obligations |  |  |
Interest rate on notes (as a percent) | 0.00% | 0.00% |
Notes payable 0.00% – 10.90%, due in monthly and annual installments through 2028 | Maximum |  |  |
Components of the company's debt obligations |  |  |
Interest rate on notes (as a percent) | 10.90% | 10.90% |
Senior unsecured notes 3.2%, due in 2022 |  |  |
Components of the company's debt obligations |  |  |
Long-term obligations gross including current maturities | $ 75,000 | $ 75,000 |
Deferred Finance Costs, Net, Total | 44 | 64 |
Long-term debt | $ 74,956 | $ 74,936 |
Interest rate on notes (as a percent) | 3.20% | 3.20% |
Senior unsecured debts 1.8% USD floating swapped to 1.36% EUR fixed, equal annual installments through 2022 |  |  |
Components of the company's debt obligations |  |  |
Long-term obligations gross including current maturities | $ 112,000 | $ 168,000 |
Deferred Finance Costs, Net, Total | 277 | 390 |
Long-term debt | $ 111,723 | $ 167,610 |
Interest rate on notes (as a percent) | 1.36% | 1.36% | 1.36%
Floating interest rate prior to conversion to a fixed interest rate | 1.80% | 3.20% |
Senior unsecured notes 3.5%, due in 2023 |  |  |
Components of the company's debt obligations |  |  |
Long-term obligations gross including current maturities | $ 125,000 | $ 125,000 |
Deferred Finance Costs, Net, Total | 116 | 144 |
Long-term debt | $ 124,884 | $ 124,856 |
Interest rate on notes (as a percent) | 3.50% | 3.50% |
Senior unsecured notes 1.0%, due in 2023 |  |  |
Components of the company's debt obligations |  |  |
Long-term obligations gross including current maturities | $ 117,230 | $ 112,170 |
Deferred Finance Costs, Net, Total | 312 | 356 |
Long-term debt | $ 116,918 | $ 111,814 |
Interest rate on notes (as a percent) | 1.00% | 1.00% |
Senior unsecured notes 3.4%, due in 2024 |  |  |
Components of the company's debt obligations |  |  |
Long-term obligations gross including current maturities | $ 50,000 | $ 50,000 |
Deferred Finance Costs, Net, Total | 53 | 63 |
Long-term debt | $ 49,947 | $ 49,937 |
Interest rate on notes (as a percent) | 3.40% | 3.40% |
Senior unsecured notes 3.5%, due in 2024 |  |  |
Components of the company's debt obligations |  |  |
Long-term obligations gross including current maturities | $ 100,000 | $ 100,000 |
Deferred Finance Costs, Net, Total | 116 | 144 |
Long-term debt | $ 99,884 | $ 99,856 |
Interest rate on notes (as a percent) | 3.50% | 3.50% |
Senior unsecured notes 1.2%, due in 2024 |  |  |
Components of the company's debt obligations |  |  |
Long-term obligations gross including current maturities | $ 234,460 | $ 224,340 |
Deferred Finance Costs, Net, Total | 621 | 742 |
Long-term debt | $ 233,839 | $ 223,598 |
Interest rate on notes (as a percent) | 1.20% | 1.20% |
Senior unsecured notes 3.6%, due in 2025 |  |  |
Components of the company's debt obligations |  |  |
Long-term obligations gross including current maturities | $ 125,000 | $ 125,000 |
Deferred Finance Costs, Net, Total | 134 | 169 |
Long-term debt | $ 124,866 | $ 124,831 |
Interest rate on notes (as a percent) | 3.60% | 3.60% |
Senior unsecured notes 3.6%, due in 2026 |  |  |
Components of the company's debt obligations |  |  |
Long-term obligations gross including current maturities | $ 125,000 | $ 125,000 |
Deferred Finance Costs, Net, Total | 134 | 169 |
Long-term debt | $ 124,866 | $ 124,831 |
Interest rate on notes (as a percent) | 3.60% | 3.60% |

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