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Summary of Investments (Unrealized Appreciation) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Change in net unrealized investment appreciation |  |
Available-for-sale fixed maturities | $ 52,556 | $ 21,008
Available-for-sale equity securities | 1,359 | (2,879)
Deferred policy acquisition costs | (11,685) | (6,911)
Income tax effect | (14,781) | (3,926)
Total change in net unrealized investment appreciation, net of tax | $ 27,449 | $ 7,292

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- Definition Amount of increase (decrease) in deferred policy acquisition cost (DAC) due to unrealized investment gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 35 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=49177698&loc=d3e10138-158409 + Details
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- Definition Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 + Details
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