DERIVATIVE AND HEDGING INSTRUMENTS - Narrative (Details) $ in Thousands, CAD in Millions	6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2016 CAD	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CAD
Derivative [Line Items]
Financial liability	$ 1,896		$ 1,468
Fair value of derivatives in a net liability position	800
Termination value of derivatives in a net liability position	800
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Financial liability	98,371		66,358
Designated as Hedging Instrument [Member] | Cash Flow Hedges [Member] | Interest Rate Cap [Member]
Derivative [Line Items]
Notional amount	200,000		200,000
Losses included in accumulated other comprehensive loss which are expected to be reclassified into earnings in the next 12 months	1,500
Designated as Hedging Instrument [Member] | Cash Flow Hedges [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	69,500	CAD 90.0	64,900	CAD 90.0
Designated as Hedging Instrument [Member] | Net Investment Hedges [Member]
Derivative [Line Items]
Financial liability	96,500	125.0
Designated as Hedging Instrument [Member] | Net Investment Hedges [Member] | Cross Currency Interest Rate Swaps [Member]
Derivative [Line Items]
Notional amount	$ 43,500	CAD 56.3	$ 40,600	CAD 56.3