Liability for Unpaid Claims and Claim Adjustment Expenses Schedule of Net Liability for Unpaid Losses and Loss Adjustment Expenses of Short-Duration Contracts - Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Effects of Reinsurance [Line Items]
Short-duration Insurance Contracts, Historical Claims Duration, Percentage of Full Payout	99.00%
Short-duration Insurance Contracts, Historical Claims Duration, Full Payout, Period	3 years
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Policy liabilities and unpaid claims balance at January 1	$ 80,663	$ 63,364
Policyholder Funds	19,037	21,056
Non-insurance warranty benefit claim liabilities	116	171
Liability for Claims and Claims Adjustment Expense	61,510	42,137
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	19,006	13,870
Policyholder Benefits and Claims Incurred [Abstract]
Current Year Claims and Claims Adjustment Expense	84,178	59,579
Prior Year Claims and Claims Adjustment Expense	(1,599)	(4,152)
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims	82,579	55,427
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year	62,989	41,578
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years	16,033	8,713
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid	79,022	50,291
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	22,603	19,006
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	(63,280)
Liability for Claims and Claims Adjustment Expense	85,883	61,510
Policyholder Funds	17,417	19,037
Non-insurance warranty benefit claim liabilities	91	116
Policy liabilities and unpaid claims balance at December 31	103,391	80,663
Other Short-duration Insurance Product Line [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	(42,341)	(28,089)
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	19,006
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	22,563	19,006
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	(63,112)	(42,341)
Other Insurance Product Line [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	(163)	(178)
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	40
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	$ (208)	$ (163)