Claims Reserve (Details) Claims Loss Roll-forward - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Subscription business
Supplementary Insurance Information, by Segment [Line Items]
Claims Reserve	$ 9,609	$ 6,559	$ 8,538	$ 5,384
Current Year Claims Incurred	74,244	58,162
Prior Year Claims Incurred	(257)	459
Total Claims Incurred	73,987	58,621
Current Year Claims Paid	65,549	51,844
Prior Years Claims Paid	7,138	5,415
Total Claims Paid	72,687	57,259
Claims expense non-cash	229	187
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	9,609
Other business
Supplementary Insurance Information, by Segment [Line Items]
Claims Reserve	1,211	1,023	$ 983	$ 890
Current Year Claims Incurred	6,337	4,427
Prior Year Claims Incurred	(128)	22
Total Claims Incurred	6,209	4,449
Current Year Claims Paid	5,217	3,484
Prior Years Claims Paid	764	832
Total Claims Paid	5,981	4,316
Claims expense non-cash	0	$ 0
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	1,211
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Subscription business
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	229
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Other business
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	2
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Subscription business
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	913
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Other business
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	88
Short duration insurance contracts accident year 2017 [Member] | Subscription business
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	8,467
Short duration insurance contracts accident year 2017 [Member] | Other business
Claims Reserve by Loss Year
Incurred but Not Reported (IBNR) Claims Liability	$ 1,121