DERIVATIVE AND HEDGING INSTRUMENTS - Summary of Derivative Instruments Designated as Hedging Instruments (Details) $ in Thousands, CAD in Millions	Jun. 30, 2015 USD ($) instrument	Jun. 30, 2015 CAD instrument	Dec. 31, 2014 USD ($)
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 3,066
Derivative Liability	1,301
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	$ 74,147		$ 0
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability | CAD		CAD 90.0
Designated as Hedging Instrument [Member] | Interest Rate Cap [Member] | Cash Flow Hedging [Member] | Prepaid Expenses, Deferred Financing Costs And Other Assets, Net [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Count | instrument	1	1
Derivative Asset	$ 3,066		4,618
Designated as Hedging Instrument [Member] | Interest Rate Cap [Member] | Cash Flow Hedging [Member] | Accounts Payable and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Count | instrument	1	1
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Accounts Payable and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	$ 1,137		0
Designated as Hedging Instrument [Member] | Cross Currency Interest Rate Swaps [Member] | Net Investment Hedging [Member] | Accounts Payable and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Count | instrument	2	2
Derivative Liability	$ 164		0
Designated as Hedging Instrument [Member] | CAD Term Loan [Member] | Net Investment Hedging [Member] | Term Loan [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Count | instrument	1	1
Derivative Liability	$ 72,846		$ 0