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Nature of Operations and Basis of Presentation (Deferred Policy Acquisition Costs) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Recorded asset at beginning of period | $ 168,264 |
Underwriting costs deferred | 53,810 |
Amortization of deferred policy acquisition costs | (50,231) |
Ending unamortized deferred policy acquisition costs | 171,843 |
Impact of unrealized gains and losses on available-for-sale securities | (11,685) | $ (6,911)
Recorded asset at end of period | 160,158 |
Property and Casualty Insurance [Member] |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Recorded asset at beginning of period | 90,547 |
Underwriting costs deferred | 52,540 |
Amortization of deferred policy acquisition costs | (48,412) |
Ending unamortized deferred policy acquisition costs | 94,675 |
Impact of unrealized gains and losses on available-for-sale securities | 0 |
Recorded asset at end of period | 94,675 |
Life Insurance [Member] |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Recorded asset at beginning of period | 77,717 |
Underwriting costs deferred | 1,270 |
Amortization of deferred policy acquisition costs | (1,819) |
Ending unamortized deferred policy acquisition costs | 77,168 |
Impact of unrealized gains and losses on available-for-sale securities | (11,685) |
Recorded asset at end of period | $ 65,483 |

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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 Net amount of deferred policy acquisition costs capitalized on contracts remaining in force as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 825 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6487548&loc=d3e32546-158582 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 55 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51660407&loc=d3e11446-158418 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6481648&loc=d3e11198-158413 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),7) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 16 -Article 12 + Details
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- Definition Total amount of policy acquisition costs capitalized during the income statement period. + 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 (a) -URI http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415 + Details
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