Claims Reserve (Details) Claims Loss Roll-forward - Other business - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Supplementary Insurance Information, by Segment [Line Items]
Claims Reserve	$ 2,528	$ 1,802	$ 2,187	$ 1,697
Current Year Claims Incurred	7,995	5,218
Prior Year Claims Incurred	(351)	(242)
Total Claims Incurred	7,644	4,976
Current Year Claims Paid	5,856	3,734
Prior Years Claims Paid	1,447	1,137
Total Claims Paid	7,303	4,871
Claims expense non-cash	0	$ 0
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	2,528
Short-duration Insurance Contracts, Accident Year 2017 [Member]
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	12
Shortduration insurance contracts for accident year 2018 [Member]
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	377
Short-duration Insurance Contracts, Accident Year 2019 [Member]
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	$ 2,139