DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments and Securities (Details) - USD ($) $ in Thousands |
Mar. 31, 2022 |
Dec. 31, 2021 |
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Reported Value Measurement | ||
Accounting Policies [Line Items] | ||
Long-term debt instruments, excluding finance lease obligations | $ 9,771,351 | $ 9,599,610 |
Estimate of Fair Value Measurement | ||
Accounting Policies [Line Items] | ||
Long-term debt instruments, excluding finance lease obligations | $ 9,802,804 | $ 10,043,877 |