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Investments (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) Securities	Dec. 31, 2017 USD ($) Securities	Dec. 31, 2016 USD ($)
Investments [Abstract]
Percentage of fixed maturity portfolio rated investment grade based on NAIC designations	97.00%	97.00%
Number of securities in unrealized loss position | Securities	2,715	955
Percentage of unrealized losses on fixed maturity securities where securities are rated investment grade	87.00%	83.00%
Proceeds from sales of available for sale securities	$ 2,500,000	$ 700,000	$ 1,000,000
Principal repayments, calls and tenders of available for sale securities	1,400,000	1,200,000	$ 1,700,000
Assets held by insurance regulators	49,200,000	47,500,000
Fair value, concentration of risk, investments	$ 0	$ 0

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This item represents the percentage of unrealized losses on fixed maturity securities that is on securities classified as investment grade.

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Represents the percentage of fixed income securities at fair value rated investment grade (NAIC 1 or 2) compared to the entire fixed income security portfolio at fair value.

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 825
-Section 50
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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position.

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This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties.

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Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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