Fair Value Quantitative Information about Level 3 Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Future policy benefits-index annuity embedded derivatives		$ 9,374
Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 47,398	$ 33,508
Fair Value Measurements, Valuation Techniques	Discounted cash flow	Discounted cash flow
Fair Value Measurements, Significant Assumptions	Credit spread	Credit spread
Input range and weighted average	0.58% - 4.25% (2.81%)	1.16% - 17.50% (11.26%)
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 81,434	$ 71,100
Fair Value Measurements, Valuation Techniques	Discounted cash flow	Discounted cash flow
Fair Value Measurements, Significant Assumptions	Credit spread	Credit spread
Input range and weighted average	1.10% - 4.15% (2.95%)	1.10% - 4.15% (3.12%)
Other asset-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 6,461	$ 13,737
Fair Value Measurements, Valuation Techniques	Discounted cash flow	Discounted cash flow
Fair Value Measurements, Significant Assumptions	Credit spread	Credit spread
Input range and weighted average	1.08% - 4.87% (3.45%)	1.25% - 7.90% (5.61%)
United States Government and agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 8,726
Fair Value Measurements, Valuation Techniques		Discounted cash flow
Fair Value Measurements, Significant Assumptions		Credit spread
Input range and weighted average		2.59% (2.59%)
Non-redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 7,411	$ 7,471
Fair Value Measurements, Valuation Techniques	Discounted cash flow	Discounted cash flow
Fair Value Measurements, Significant Assumptions	Credit spread	Credit spread
Input range and weighted average	4.05% (4.05%)	4.55% (4.55%)
Asset fair value by technique [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 142,704	$ 134,542
Index Annuity Embedded Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Future policy benefits-index annuity embedded derivatives	$ 15,778	$ 9,374
Fair Value Measurements, Valuation Techniques	Discounted cash flow	Discounted cash flow
Fair Value Measurements, Significant Assumptions	Credit risk Risk margin	Credit risk Risk margin
Input range and weighted average	0.80% - 2.00% (1.25%) 0.15% - 0.40% (0.25%)	0.80% - 2.25% (1.45%) 0.15% - 0.40% (0.25%)