Claims Reserve Claims Reserve (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Subscription business
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 15,776
Claims Reserve	15,776	$ 12,212	$ 13,875	$ 11,059
Current Year Claims Incurred	110,248	91,464
Prior Year Claims Incurred	551	119
Current Year Claims Paid	97,165	80,841
Prior Years Claims Paid	11,364	9,256
Total Claims Paid	108,529	90,097
Claims expense non-cash	369	333
Total Claims Incurred	110,799	91,583
Other business
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	2,504
Claims Reserve	2,504	1,784	$ 2,187	$ 1,697
Current Year Claims Incurred	16,747	10,589
Prior Year Claims Incurred	(331)	(279)
Current Year Claims Paid	14,431	8,916
Prior Years Claims Paid	1,668	1,307
Total Claims Paid	16,099	10,223
Claims expense non-cash	0	0
Total Claims Incurred	16,416	$ 10,310
Short-duration Insurance Contracts, Accident Year 2017 [Member] | Subscription business
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	862
Short-duration Insurance Contracts, Accident Year 2017 [Member] | Other business
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	9
Shortduration insurance contracts for accident year 2018 [Member] | Subscription business
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	2,201
Shortduration insurance contracts for accident year 2018 [Member] | Other business
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	179
Short-duration Insurance Contracts, Accident Year 2019 [Member] | Subscription business
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	12,713
Short-duration Insurance Contracts, Accident Year 2019 [Member] | Other business
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 2,316