DERIVATIVE AND HEDGING INSTRUMENTS - Derivative and Financial Instruments Designated as Hedging Instruments (Details) $ in Thousands	Sep. 30, 2021 USD ($) instrument	Dec. 31, 2020 USD ($)
Assets:
Fair Value	$ 2,319	$ 12,802
Liabilities:
Fair Value	7,273	37,018
Designated as Hedging Instrument
Assets:
Fair Value	2,319	12,802
Liabilities:
Fair Value	$ 105,611	135,118
Designated as Hedging Instrument \| Interest rate swaps \| Cash flow \| Accounts receivable, prepaid expenses and other assets, net
Assets:
Count \| instrument	2
Fair Value	$ 290	0
Designated as Hedging Instrument \| Interest rate swaps \| Cash flow \| Accounts payable and accrued liabilities
Liabilities:
Count \| instrument	4
Fair Value	$ 6,220	23,849
Designated as Hedging Instrument \| Interest rate collar \| Cash flow \| Accounts payable and accrued liabilities
Liabilities:
Count \| instrument	2
Fair Value	$ 1,053	1,626
Designated as Hedging Instrument \| Forward starting interest rate swaps \| Cash flow \| Accounts receivable, prepaid expenses and other assets, net
Assets:
Count \| instrument	0
Fair Value	$ 0	10,652
Designated as Hedging Instrument \| Forward starting interest rate swaps \| Cash flow \| Accounts payable and accrued liabilities
Liabilities:
Count \| instrument	0
Fair Value	$ 0	10,723
Designated as Hedging Instrument \| Cross currency interest rate swaps \| Net investment \| Accounts receivable, prepaid expenses and other assets, net
Assets:
Count \| instrument	2
Fair Value	$ 2,029	2,150
Designated as Hedging Instrument \| Forward starting interest rate collars \| Cash flow \| Accounts payable and accrued liabilities
Liabilities:
Count \| instrument	0
Fair Value	$ 0	820
Designated as Hedging Instrument \| CAD term loan \| Net investment \| Term loans, net
Liabilities:
Count \| instrument	1
Fair Value	$ 98,338	$ 98,100

The number of derivative instruments of a particular derivative asset or group of derivative assets held by the entity.

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The number of derivative instruments of a particular derivative liability or group of derivative liabilities held by the entity.

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