Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS - Interest Swap Derivatives (Details)

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FAIR VALUE MEASUREMENTS - Interest Swap Derivatives (Details) - Interest Rate Swap - Level 2 - Designated as Hedging Instrument - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis [Roll Forward]    
Fair value at beginning of period $ (77,918) $ (18,963)
Swap ineffectiveness 17 17
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss 4,957 612
Unrealized losses on interest rate swaps included in accumulated other comprehensive (loss) income 20,900 (66,369)
Fair value of end of period $ (52,044) $ (84,703)