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Basis of Presentation (Details 1) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Net Unrealized Investment Gains and Losses on Fixed Maturity and Equity Securities |  |  |
Beginning balance | [1],[2] | $ 175,738 | $ 175,167
Other comprehensive income (loss) before reclassifications | [1],[2] | 22,330 | 69,971
Amounts reclassified from accumulated other comprehensive income (loss) | [1],[2] | 203 | (481)
Net current period other comprehensive income (loss) | [1],[2] | 22,533 | 69,490
Ending balance | [1],[2] | 198,271 | 244,657
Defined Benefit Plans |  |  |
Beginning balance | [1] | (11,817) | (11,794)
Other comprehensive income (loss) before reclassifications | [1] | 0 | 0
Amounts reclassified from accumulated other comprehensive income (loss) | [1] | 0 | 0
Net current period other comprehensive income | [1] | 0 | 0
Ending balance | [1] | (11,817) | (11,794)
Beginning balance | [1] | 163,921 | 163,373
Other comprehensive income (loss) before reclassifications | [1] | 22,330 | 69,971
Amounts reclassified from accumulated other comprehensive income (loss) | [1] | 203 | (481)
Other comprehensive income | [1] | 22,533 | 69,490
Ending balance | [1] | $ 186,454 | $ 232,863
[1] | All amounts are net of tax.
[2] | The pretax amounts reclassified from accumulated other comprehensive income (loss), $(313) and $740, are included in net realized investment gains and losses and the related income tax expenses, $(110) and $259, are included in income tax expense in the Consolidated Statements of Operations for the three months ended March 31, 2017 and 2016, respectively.

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- Definition Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 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=66004124&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580 Reference 4: 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=66004124&loc=SL7669646-108580 + Details
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- Definition The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + 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 (j-k) -URI http://asc.fasb.org/extlink&oid=66004124&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=66004124&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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