DERIVATIVE AND HEDGING INSTRUMENTS - Narrative (Details)	1 Months Ended	12 Months Ended
	May 31, 2019 USD ($) derivative	Dec. 31, 2019 USD ($) derivative	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 CAD ($) derivative	Dec. 31, 2018 CAD ($)
Derivative [Line Items]
Interest		$ 126,610,000	$ 147,106,000	$ 88,440,000
Fair value of derivatives in a net liability position		626,000	4,529,000
Forward Starting Interest Rate Swaps
Derivative [Line Items]
Number of derivative contracts terminated | derivative	3
Payments for termination of derivative instruments	$ 12,600,000
Credit-Risk-Related Contingent Features
Derivative [Line Items]
Fair value of derivatives in a net liability position		100,000
Termination value		100,000
Cash Flow Hedges | Interest Rate Swap
Derivative [Line Items]
Hedge ineffectiveness recorded in earnings		0	0	22,000
Designated as Hedging Instrument
Derivative [Line Items]
Fair value of derivatives in a net liability position		96,651,000	96,229,000
Designated as Hedging Instrument | Cash Flow Hedges
Derivative [Line Items]
Losses included in accumulated other comprehensive loss		1,200,000
Notional amount		$ 1,490,000,000	1,045,000,000
Designated as Hedging Instrument | Cash Flow Hedges | Cross Currency Interest Rate Swaps
Derivative [Line Items]
Notional amount					$ 125,000,000	$ 125,000,000
Not Designated as Hedging Instrument | Cross Currency Interest Rate Swaps
Derivative [Line Items]
Derivative instruments | derivative		1			1
Fair value of derivative asset		$ 105,000
Other income (expense)		$ 5,000	$ 34,000	$ (8,000)