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Investments (Unrealized Gains on Investments) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Net unrealized gains | $ 64,804 | $ 69,224 | $ 123,683
Deferred income tax expense | (22,681) | (24,228) | (43,289)
Net unrealized gains, net of deferred income tax | 42,123 | 44,996 | 80,394
(Decrease) increase in net unrealized gains in OCI, net of deferred income tax | (2,873) | (35,398) | 28,890
AFS Fixed Income Securities [Member] |  |  |
Net unrealized gains | 38,781 | 55,689 | 90,336
Equity Securities [Member] |  |  |
Net unrealized gains | 25,864 | 13,235 | 32,389
Available-for-sale Securities [Member] |  |  |
Net unrealized gains | 64,645 | 68,924 | 122,725
Total HTM Securities [Member] |  |  |
Net unrealized gains | $ 159 | $ 300 | $ 958

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- Definition Tax effect of unrealized gain (loss) on investments in accumulated other comprehensive income. + References No definition available. + Details
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- Definition This item represents the net unrealized gains (losses) on investments in other comprehensive income, net of deferred income tax. + References No definition available. + Details
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- Definition Total change in unrealized gains/losses on investment securities net of tax. + References No definition available. + Details
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- Definition This item represents the net unrealized gains (losses) on investments in other comprehensive income. + References No definition available. + Details
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- Details
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