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Basis of Presentation (Tables) | 3 Months Ended
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Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Investment Contract And Life Policy Reserves | This table summarizes the Company’s investment contract and life policy reserves.
($ in thousands) |  | March 31, 2018 |  | December 31, 2017
Investment contract reserves |  | $ | 4,471,733 |  |  | $ | 4,452,972 |
Life policy reserves |  | 1,126,945 |  |  | 1,120,763 |
Total |  | $ | 5,598,678 |  |  | $ | 5,573,735 |
Accumulated Other Comprehensive Income (Loss) | The following tables reconcile these components.
($ in thousands) |  | Net Unrealized Investment Gains and Losses on Securities (1)(2) |  | Defined Benefit Plans (1) |  | Total (1)
Beginning balance, January 1, 2018 |  | $ | 300,177 |  |  | $ | (13,217 | ) |  | $ | 286,960 |
Other comprehensive income (loss) before reclassifications |  | (109,539 | ) |  | — |  |  | (109,539 | )
Amounts reclassified from accumulated other comprehensive income (loss) |  | 2,443 |  |  | — |  |  | 2,443 |
Cumulative effect of change in accounting principle (3) |  | (15,041 | ) |  | — |  |  | (15,041 | )
Net current period other comprehensive income (loss) |  | (122,137 | ) |  | — |  |  | (122,137 | )
Ending balance, March 31, 2018 |  | $ | 178,040 |  |  | $ | (13,217 | ) |  | $ | 164,823 |
Beginning balance, January 1, 2017 |  | $ | 175,738 |  |  | $ | (11,817 | ) |  | $ | 163,921 |
Other comprehensive income (loss) before reclassifications |  | 22,330 |  |  | — |  |  | 22,330 |
Amounts reclassified from accumulated other comprehensive income (loss) |  | 203 |  |  | — |  |  | 203 |
Net current period other comprehensive income (loss) |  | 22,533 |  |  | — |  |  | 22,533 |
Ending balance, March 31, 2017 |  | $ | 198,271 |  |  | $ | (11,817 | ) |  | $ | 186,454 |
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(1) | All amounts are net of tax.
(2) | The pretax amounts reclassified from accumulated other comprehensive income (loss), $(3,092) thousand and $(313) thousand, are included in net investment gains and losses and the related income tax expenses, $(649) thousand and $(110) thousand, are included in income tax expense in the Consolidated Statements of Operations for the three month periods ended March 31, 2018 and 2017, respectively.
(3) The Company adopted guidance on January 1, 2018 that resulted in reclassifying $15,041 thousand of after tax unrealized gains on equity securities from AOCI to Retained earnings.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + 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=84228862&loc=SL7669686-108580 + Details
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