DERIVATIVE AND HEDGING INSTRUMENTS - Derivative and Financial Instruments Designated as Hedging Instruments (Details) $ in Thousands	Mar. 31, 2019 USD ($) instrument	Dec. 31, 2018 USD ($)
Assets:
Fair Value	$ 20,940	$ 29,344
Liabilities:
Fair Value	11,926	4,529
Designated as Hedging Instrument
Assets:
Fair Value	20,940	29,344
Liabilities:
Fair Value	$ 105,551	96,229
Designated as Hedging Instrument \| Interest rate swaps \| Cash flow \| Accounts receivable, prepaid expenses and other assets, net
Assets:
Count \| instrument	12
Fair Value	$ 18,057	25,184
Designated as Hedging Instrument \| Interest rate swaps \| Cash flow \| Accounts payable and accrued liabilities
Liabilities:
Count \| instrument	3
Fair Value	$ 11,926	4,529
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	$ 2,883	4,160
Designated as Hedging Instrument \| CAD term loan \| Net investment \| Term loans, net
Liabilities:
Count \| instrument	1
Fair Value	$ 93,625	$ 91,700

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.

+ References

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