DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING - Schedule of gain or loss recognized on derivative financial instruments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Derivative instruments, gain (loss) recognized
Total Interest expense in which the effects of cash flow hedges are recorded	$ (11,012)	$ (10,852)
Cash flow hedges \| Interest rate swaps
Derivative instruments, gain (loss) recognized
Loss recognized in Other comprehensive income on derivative financial instruments	(19,823)	(5,497)
Total Interest expense in which the effects of cash flow hedges are recorded	(11,012)	(10,852)
Cash flow hedges \| Interest rate swaps \| Interest expense
Derivative instruments, gain (loss) recognized
(Loss) gain reclassified from Other comprehensive income to Interest expense	$ (779)	$ 61

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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