Investments - Loan-to-Value and Debt-Service Coverage (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Investments
Net commercial mortgage loans	$ 15,311	$ 19,772
Fixed maturity securities
Investments
Fixed maturity securities on deposit with various governmental authorities	$ 813	797
70% and less \| Maximum
Investments
Loan-to-value percentage	70.00%
71 - 80% \| Minimum
Investments
Loan-to-value percentage	71.00%
71 - 80% \| Maximum
Investments
Loan-to-value percentage	80.00%
81 - 95% \| Minimum
Investments
Loan-to-value percentage	81.00%
81 - 95% \| Maximum
Investments
Loan-to-value percentage	95.00%
Commercial mortgage loans
Investments
Decrease in loan valuation allowance	$ 266	12
Commercial mortgage loans \| Minimum
Investments
Carrying Value	340	373
Commercial mortgage loans \| Maximum
Investments
Carrying Value	$ 1,832	1,880
Commercial mortgage loans \| Investment portfolio \| Geographic Concentration Risk \| Washington, Colorado and California
Investments
Concentration percentage	52.00%
Commercial Portfolio Segment
Investments
Less valuation allowance	$ (120)	(386)
Net commercial mortgage loans	15,311	19,772
Commercial Portfolio Segment \| Commercial mortgage loans
Investments
Carrying Value	$ 15,431	$ 20,158
% of Gross Mortgage Loans	100.00%	100.00%
Debt-Service Coverage ratio	2.17	2.00
Commercial Portfolio Segment \| Commercial mortgage loans \| 70% and less
Investments
Carrying Value	$ 12,682	$ 15,073
% of Gross Mortgage Loans	82.20%	74.80%
Debt-Service Coverage ratio	2.39	2.28
Commercial Portfolio Segment \| Commercial mortgage loans \| 71 - 80%
Investments
Carrying Value	$ 2,749	$ 2,266
% of Gross Mortgage Loans	17.80%	11.20%
Debt-Service Coverage ratio	1.17	1.15
Commercial Portfolio Segment \| Commercial mortgage loans \| 81 - 95%
Investments
Carrying Value		$ 2,819
% of Gross Mortgage Loans		14.00%
Debt-Service Coverage ratio		1.15

Represents percentage of classified loans to total gross commercial mortgage loans.

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Represents the ratio of cash available for debt servicing of interest, principal and lease payments for commercial mortgage loans.

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No definition available.

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Represents the ratio of a loan underwritten to a value of an asset purchased.

+ References

No definition available.

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Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The increase (decrease) in the allowance for credit losses related to financing receivables.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of mortgage loans on existing land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

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The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

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