Investments, Gain (Loss) on Investments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Gain (Loss) on Investments [Line Items]
Net realized investment gains (losses) and OTTI on investments	$ 26,327us-gaap_GainLossOnInvestments	$ (231)us-gaap_GainLossOnInvestments
Gross realized gains, gross realized losses and impairment losses [Abstract]
Gains on sales	27,206	805
Losses on sales	(879)	(1,036)
Total net realized gains (losses)	26,327us-gaap_GainLossOnInvestments	(231)us-gaap_GainLossOnInvestments
Fixed Maturities [Member]
Gain (Loss) on Investments [Line Items]
Net realized investment gains (losses) and OTTI on investments	26,324	(234)
Gross realized gains, gross realized losses and impairment losses [Abstract]
Total net realized gains (losses)	26,324	(234)
Equity Securities [Member]
Gain (Loss) on Investments [Line Items]
Net realized investment gains (losses) and OTTI on investments	3	3
Gross realized gains, gross realized losses and impairment losses [Abstract]
Total net realized gains (losses)	$ 3	$ 3

- Definition

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

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