DERIVATIVE AND HEDGING INSTRUMENTS - Summary of Derivative and Financial Instruments Designated as Hedging Instruments (Details) $ in Thousands, CAD in Millions	Sep. 30, 2015 USD ($) instrument	Sep. 30, 2015 CAD instrument	Dec. 31, 2014 USD ($)
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 6,083
Derivative Liability	1,542
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	6,083		$ 4,618
Derivative Liability	68,655		0
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	$ 67,100	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	$ 1,683		4,618
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, Count | instrument	1	1
Derivative Liability	$ 1,542		0
Designated as Hedging Instrument [Member] | Cross Currency Interest Rate Swaps [Member] | Net Investment Hedging [Member] | Prepaid Expenses, Deferred Financing Costs And Other Assets, Net [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Count | instrument	2	2
Derivative Asset	$ 4,400		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	$ 67,113		$ 0