Segmented Information Net Earned by Line of Business (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Net premiums earned	$ 33,518	$ 31,813	$ 66,440	$ 61,240
Private passenger auto liability [Member]
Segment Reporting Information [Line Items]
Net premiums earned	22,933	21,656	45,309	41,731
Auto physical damage [Member]
Segment Reporting Information [Line Items]
Net premiums earned	10,585	10,157	21,131	19,509
Other Segments [Member]
Segment Reporting Information [Line Items]
Net premiums earned	$ 33,518	$ 31,813	$ 66,440	$ 61,240