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, 2020
Mar. 31, 2019
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis [Roll Forward]    
Fair value at beginning of period $ (19,083) $ 14,195
(Gains) losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive (loss) income 612 (1,276)
Unrealized losses on interest rate swaps included in accumulated other comprehensive (loss) income (66,369) (8,039)
Fair value of end of period $ (84,840) $ 4,880