Derivative Financial Instruments - Summary of Outstanding Interest Rate Derivatives Designated as Cash Flow Hedges of Interest Rate Risk (Detail) - Cash Flow Hedges [Member] - Designated as Hedging Instrument [Member] - CAD [Member] - CDOR [Member] $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020 CAD ($) DerivativeInstrument	Dec. 31, 2019 CAD ($) DerivativeInstrument
Interest Rate Caps [Member]
Derivative [Line Items]
Number of Instruments | DerivativeInstrument	1	1
Notional Amount | $	$ 21,387	$ 21,387
Strike	3.00%	3.00%
Wtd. Avg. Maturity (Years)	8 months 12 days	1 year
Interest Rate Swaps [Member]
Derivative [Line Items]
Number of Instruments | DerivativeInstrument	2	2
Notional Amount | $	$ 17,273	$ 17,273
Strike	1.00%	1.00%
Wtd. Avg. Maturity (Years)	4 months 24 days	8 months 12 days