DERIVATIVE AND HEDGING INSTRUMENTS - Derivative and Financial Instruments Designated as Hedging Instruments (Details) $ in Thousands	Mar. 31, 2018 USD ($) instrument	Dec. 31, 2017 USD ($)
Assets:
Fair Value	$ 34,647	$ 25,895
Liabilities:
Fair Value	0	0
Designated as Hedging Instrument
Assets:
Fair Value	34,647	25,895
Liabilities:
Fair Value	$ 96,912	99,588
Designated as Hedging Instrument \| Interest rate swap \| Cash flow \| Accounts receivable, prepaid expenses and other assets, net
Assets:
Count \| instrument	12
Fair Value	$ 33,374	25,221
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	$ 1,273	674
Designated as Hedging Instrument \| CAD term loan \| Net investment \| Term loans, net
Liabilities:
Count \| instrument	1
Fair Value	$ 96,912	$ 99,588

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959

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-Publisher FASB
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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226008-175313

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- Definition

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

+ References

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-Topic 815
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