Claims Reserve Incurred claims and claim adjustment expense (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Segments [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	$ 79,934
Liability for Unpaid Claims and Claims Adjustment Expense, Net	5,653	$ 2,187	$ 1,697	$ 983
Other Segments [Member] | Short-duration Insurance Contracts, Accident Year 2018 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	23,351	21,613
Other Segments [Member] | Short-duration Insurance Contracts, Accident Year 2016 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	8,861	8,852	8,832	8,048
Other Segments [Member] | Short-duration Insurance Contracts, Accident Year 2017 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	14,466	14,408	13,053
Other Segments [Member] | Short-duration Insurance Contracts, Accident Year 2019 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	33,256
Subscription business [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	687,535
Liability for Unpaid Claims and Claims Adjustment Expense, Net	15,541	13,875	11,059	8,538
Subscription business [Member] | Short-duration Insurance Contracts, Accident Year 2018 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	189,439	177,714
Subscription business [Member] | Short-duration Insurance Contracts, Accident Year 2016 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	123,902	123,764	123,422	$ 115,965
Subscription business [Member] | Short-duration Insurance Contracts, Accident Year 2017 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	155,217	$ 154,679	$ 145,087
Subscription business [Member] | Short-duration Insurance Contracts, Accident Year 2019 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	$ 218,977