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Investments - Amortized Cost and Fair Value of Available-for-sale Fixed-maturity Securities in Default (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Investments Debt And Equity Securities [Abstract]
Available-for-sale fixed-maturity securities in default, amortized cost	$ 10	$ 503
Available-for-sale fixed-maturity securities in default, fair value	$ 201	$ 654

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- Definition

Available for sale fixed maturity securities in default amortized cost.

+ References

No definition available.

+ Details

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- Definition

Available for sale fixed maturity securities in default fair value.

+ References

No definition available.

+ Details

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- References

No definition available.

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