Segmented Information - Revenue by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Service fee and commission income	$ 12,904	$ 9,871	$ 34,491	$ 28,382
Other income	110	(17)	368	304
Rental income	3,341	3,341	10,023	10,034
Total revenues	16,355	13,195	44,882	38,720
Operating Segments
Segment Reporting Information [Line Items]
Total revenues	16,355	13,195	44,882	38,709
Not allocated to segments
Segment Reporting Information [Line Items]
Rental income	0		0
Rental income		0		11
Extended Warranty | Operating Segments
Segment Reporting Information [Line Items]
Service fee and commission income	12,904	9,871	34,491	28,382
Other income	43	34	159	136
Total revenues	12,947	9,905	34,650	28,518
Leased Real Estate | Operating Segments
Segment Reporting Information [Line Items]
Other income	67	(51)	209	168
Rental income	3,341		10,023
Rental income		3,341		10,023
Total revenues	$ 3,408	$ 3,290	$ 10,232	$ 10,191